./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 17:33:09,924 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 17:33:09,980 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 17:33:09,983 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 17:33:09,986 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 17:33:10,007 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 17:33:10,007 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 17:33:10,007 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 17:33:10,008 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 17:33:10,009 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 17:33:10,009 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 17:33:10,009 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 17:33:10,010 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 17:33:10,010 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 17:33:10,010 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 17:33:10,010 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 17:33:10,010 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 17:33:10,010 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 17:33:10,010 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 17:33:10,010 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 17:33:10,010 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 17:33:10,010 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 17:33:10,010 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 17:33:10,011 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 17:33:10,011 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 17:33:10,011 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 17:33:10,011 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 17:33:10,011 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 17:33:10,011 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 17:33:10,011 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 17:33:10,011 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 17:33:10,011 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 17:33:10,011 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:33:10,011 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 17:33:10,011 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 17:33:10,011 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 17:33:10,011 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 17:33:10,011 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 17:33:10,012 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 17:33:10,012 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 17:33:10,012 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 17:33:10,012 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 17:33:10,012 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 17:33:10,012 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/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 -> 14a9c1cac7f040ebf84fc8e1c821294cab75b8332a1643f6e05ef67dfff453ec [2025-03-08 17:33:10,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 17:33:10,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 17:33:10,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 17:33:10,250 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 17:33:10,250 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 17:33:10,252 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2025-03-08 17:33:11,415 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57937f8af/6b16b05702714141b86ede66c2af13ed/FLAGc6109e1b0 [2025-03-08 17:33:11,655 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 17:33:11,656 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2025-03-08 17:33:11,664 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57937f8af/6b16b05702714141b86ede66c2af13ed/FLAGc6109e1b0 [2025-03-08 17:33:11,976 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57937f8af/6b16b05702714141b86ede66c2af13ed [2025-03-08 17:33:11,977 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 17:33:11,978 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 17:33:11,980 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 17:33:11,980 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 17:33:11,983 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 17:33:11,984 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:33:11" (1/1) ... [2025-03-08 17:33:11,984 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eaf004b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:33:11, skipping insertion in model container [2025-03-08 17:33:11,984 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:33:11" (1/1) ... [2025-03-08 17:33:11,997 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 17:33:12,094 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2297,2310] [2025-03-08 17:33:12,105 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:33:12,112 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 17:33:12,130 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2297,2310] [2025-03-08 17:33:12,134 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:33:12,143 INFO L204 MainTranslator]: Completed translation [2025-03-08 17:33:12,144 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:33:12 WrapperNode [2025-03-08 17:33:12,145 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 17:33:12,146 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 17:33:12,146 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 17:33:12,146 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 17:33:12,151 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:33:12" (1/1) ... [2025-03-08 17:33:12,156 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:33:12" (1/1) ... [2025-03-08 17:33:12,174 INFO L138 Inliner]: procedures = 25, calls = 26, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 123 [2025-03-08 17:33:12,177 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 17:33:12,177 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 17:33:12,178 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 17:33:12,178 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 17:33:12,184 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:33:12" (1/1) ... [2025-03-08 17:33:12,184 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:33:12" (1/1) ... [2025-03-08 17:33:12,185 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:33:12" (1/1) ... [2025-03-08 17:33:12,202 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-03-08 17:33:12,203 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:33:12" (1/1) ... [2025-03-08 17:33:12,203 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:33:12" (1/1) ... [2025-03-08 17:33:12,208 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:33:12" (1/1) ... [2025-03-08 17:33:12,212 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:33:12" (1/1) ... [2025-03-08 17:33:12,213 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:33:12" (1/1) ... [2025-03-08 17:33:12,214 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:33:12" (1/1) ... [2025-03-08 17:33:12,217 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 17:33:12,218 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 17:33:12,220 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 17:33:12,220 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 17:33:12,221 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:33:12" (1/1) ... [2025-03-08 17:33:12,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:33:12,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:33:12,249 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 17:33:12,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 17:33:12,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 17:33:12,272 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-08 17:33:12,272 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-08 17:33:12,272 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-08 17:33:12,272 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-08 17:33:12,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 17:33:12,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 17:33:12,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 17:33:12,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 17:33:12,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-08 17:33:12,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-08 17:33:12,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-08 17:33:12,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 17:33:12,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 17:33:12,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 17:33:12,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 17:33:12,274 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-08 17:33:12,360 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 17:33:12,361 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 17:33:12,595 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-08 17:33:12,595 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 17:33:12,772 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 17:33:12,773 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 17:33:12,773 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:33:12 BoogieIcfgContainer [2025-03-08 17:33:12,773 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 17:33:12,776 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 17:33:12,776 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 17:33:12,779 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 17:33:12,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:33:11" (1/3) ... [2025-03-08 17:33:12,780 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34daf532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:33:12, skipping insertion in model container [2025-03-08 17:33:12,780 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:33:12" (2/3) ... [2025-03-08 17:33:12,780 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34daf532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:33:12, skipping insertion in model container [2025-03-08 17:33:12,781 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:33:12" (3/3) ... [2025-03-08 17:33:12,781 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2025-03-08 17:33:12,792 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 17:33:12,793 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-counter-queue2.wvr.c that has 3 procedures, 22 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-08 17:33:12,793 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-08 17:33:12,830 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-08 17:33:12,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions, 62 flow [2025-03-08 17:33:12,880 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2025-03-08 17:33:12,882 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-08 17:33:12,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 22 events. 3/22 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2025-03-08 17:33:12,886 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 24 transitions, 62 flow [2025-03-08 17:33:12,888 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 21 transitions, 54 flow [2025-03-08 17:33:12,898 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:33:12,909 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;@68e78e33, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:33:12,909 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-08 17:33:12,915 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:33:12,916 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2025-03-08 17:33:12,916 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-08 17:33:12,916 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:12,917 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:33:12,917 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:33:12,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:12,921 INFO L85 PathProgramCache]: Analyzing trace with hash -470529137, now seen corresponding path program 1 times [2025-03-08 17:33:12,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:12,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117369940] [2025-03-08 17:33:12,929 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:33:12,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:13,005 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-08 17:33:13,032 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 17:33:13,033 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:33:13,033 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:13,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:13,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:13,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117369940] [2025-03-08 17:33:13,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117369940] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:33:13,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:33:13,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 17:33:13,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890563148] [2025-03-08 17:33:13,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:33:13,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:33:13,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:13,169 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:33:13,170 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:33:13,172 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-08 17:33:13,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:13,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:13,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-08 17:33:13,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:13,269 INFO L124 PetriNetUnfolderBase]: 93/181 cut-off events. [2025-03-08 17:33:13,269 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2025-03-08 17:33:13,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373 conditions, 181 events. 93/181 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 579 event pairs, 22 based on Foata normal form. 1/177 useless extension candidates. Maximal degree in co-relation 315. Up to 113 conditions per place. [2025-03-08 17:33:13,273 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 25 selfloop transitions, 3 changer transitions 1/32 dead transitions. [2025-03-08 17:33:13,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 32 transitions, 143 flow [2025-03-08 17:33:13,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:33:13,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:33:13,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2025-03-08 17:33:13,281 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2025-03-08 17:33:13,283 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 54 flow. Second operand 3 states and 45 transitions. [2025-03-08 17:33:13,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 32 transitions, 143 flow [2025-03-08 17:33:13,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 32 transitions, 129 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-08 17:33:13,289 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 65 flow [2025-03-08 17:33:13,291 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=24, PETRI_TRANSITIONS=23} [2025-03-08 17:33:13,294 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, -1 predicate places. [2025-03-08 17:33:13,294 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 65 flow [2025-03-08 17:33:13,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:13,295 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:13,295 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:33:13,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 17:33:13,295 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:33:13,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:13,297 INFO L85 PathProgramCache]: Analyzing trace with hash 705641639, now seen corresponding path program 1 times [2025-03-08 17:33:13,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:13,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625379803] [2025-03-08 17:33:13,298 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:33:13,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:13,311 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-08 17:33:13,328 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:33:13,328 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:33:13,328 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:13,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:13,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:13,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625379803] [2025-03-08 17:33:13,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625379803] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:33:13,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:33:13,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:33:13,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066183867] [2025-03-08 17:33:13,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:33:13,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:33:13,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:13,474 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:33:13,474 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-08 17:33:13,481 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-08 17:33:13,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 65 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:13,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:13,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-08 17:33:13,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:13,626 INFO L124 PetriNetUnfolderBase]: 171/329 cut-off events. [2025-03-08 17:33:13,626 INFO L125 PetriNetUnfolderBase]: For 43/46 co-relation queries the response was YES. [2025-03-08 17:33:13,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 739 conditions, 329 events. 171/329 cut-off events. For 43/46 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1320 event pairs, 111 based on Foata normal form. 0/303 useless extension candidates. Maximal degree in co-relation 257. Up to 209 conditions per place. [2025-03-08 17:33:13,630 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 40 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2025-03-08 17:33:13,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 47 transitions, 220 flow [2025-03-08 17:33:13,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:33:13,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:33:13,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2025-03-08 17:33:13,632 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2025-03-08 17:33:13,632 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 65 flow. Second operand 5 states and 62 transitions. [2025-03-08 17:33:13,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 47 transitions, 220 flow [2025-03-08 17:33:13,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 47 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-08 17:33:13,633 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 98 flow [2025-03-08 17:33:13,633 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=98, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2025-03-08 17:33:13,634 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2025-03-08 17:33:13,634 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 98 flow [2025-03-08 17:33:13,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:13,634 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:13,634 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:33:13,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 17:33:13,634 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:33:13,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:13,636 INFO L85 PathProgramCache]: Analyzing trace with hash 488299972, now seen corresponding path program 1 times [2025-03-08 17:33:13,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:13,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508190294] [2025-03-08 17:33:13,637 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:33:13,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:13,646 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-08 17:33:13,656 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:33:13,656 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:33:13,656 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:13,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:13,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:13,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508190294] [2025-03-08 17:33:13,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508190294] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:33:13,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:33:13,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:33:13,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650941810] [2025-03-08 17:33:13,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:33:13,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:33:13,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:13,785 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:33:13,785 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-08 17:33:13,793 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-08 17:33:13,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:13,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:13,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-08 17:33:13,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:13,901 INFO L124 PetriNetUnfolderBase]: 138/264 cut-off events. [2025-03-08 17:33:13,901 INFO L125 PetriNetUnfolderBase]: For 100/114 co-relation queries the response was YES. [2025-03-08 17:33:13,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 664 conditions, 264 events. 138/264 cut-off events. For 100/114 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 969 event pairs, 95 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 509. Up to 205 conditions per place. [2025-03-08 17:33:13,903 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 20 selfloop transitions, 2 changer transitions 15/39 dead transitions. [2025-03-08 17:33:13,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 39 transitions, 209 flow [2025-03-08 17:33:13,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:33:13,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:33:13,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 56 transitions. [2025-03-08 17:33:13,906 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2025-03-08 17:33:13,907 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 98 flow. Second operand 5 states and 56 transitions. [2025-03-08 17:33:13,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 39 transitions, 209 flow [2025-03-08 17:33:13,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 39 transitions, 205 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-08 17:33:13,909 INFO L231 Difference]: Finished difference. Result has 35 places, 24 transitions, 86 flow [2025-03-08 17:33:13,909 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=86, PETRI_PLACES=35, PETRI_TRANSITIONS=24} [2025-03-08 17:33:13,911 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 10 predicate places. [2025-03-08 17:33:13,911 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 24 transitions, 86 flow [2025-03-08 17:33:13,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:13,911 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:13,911 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:33:13,912 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 17:33:13,912 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:33:13,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:13,913 INFO L85 PathProgramCache]: Analyzing trace with hash -535062555, now seen corresponding path program 1 times [2025-03-08 17:33:13,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:13,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61951749] [2025-03-08 17:33:13,913 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:33:13,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:13,921 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 17:33:13,933 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:33:13,934 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:33:13,934 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:14,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:14,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:14,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61951749] [2025-03-08 17:33:14,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61951749] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:33:14,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672851895] [2025-03-08 17:33:14,009 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:33:14,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:14,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:33:14,012 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:33:14,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 17:33:14,056 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 17:33:14,072 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:33:14,072 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:33:14,072 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:14,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 17:33:14,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:33:14,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:14,149 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:33:14,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:14,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672851895] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-08 17:33:14,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-08 17:33:14,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2025-03-08 17:33:14,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618249618] [2025-03-08 17:33:14,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:33:14,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:33:14,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:14,196 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:33:14,196 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-03-08 17:33:14,203 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-08 17:33:14,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 24 transitions, 86 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:14,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:14,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-08 17:33:14,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:14,260 INFO L124 PetriNetUnfolderBase]: 116/210 cut-off events. [2025-03-08 17:33:14,260 INFO L125 PetriNetUnfolderBase]: For 73/89 co-relation queries the response was YES. [2025-03-08 17:33:14,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 564 conditions, 210 events. 116/210 cut-off events. For 73/89 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 687 event pairs, 33 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 547. Up to 109 conditions per place. [2025-03-08 17:33:14,262 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 25 selfloop transitions, 5 changer transitions 0/32 dead transitions. [2025-03-08 17:33:14,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 32 transitions, 173 flow [2025-03-08 17:33:14,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:33:14,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:33:14,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2025-03-08 17:33:14,263 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4 [2025-03-08 17:33:14,263 INFO L175 Difference]: Start difference. First operand has 35 places, 24 transitions, 86 flow. Second operand 5 states and 48 transitions. [2025-03-08 17:33:14,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 32 transitions, 173 flow [2025-03-08 17:33:14,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 149 flow, removed 10 selfloop flow, removed 6 redundant places. [2025-03-08 17:33:14,264 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 91 flow [2025-03-08 17:33:14,264 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2025-03-08 17:33:14,265 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 6 predicate places. [2025-03-08 17:33:14,265 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 91 flow [2025-03-08 17:33:14,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:14,265 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:14,265 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:33:14,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-08 17:33:14,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:14,466 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:33:14,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:14,466 INFO L85 PathProgramCache]: Analyzing trace with hash -2019467290, now seen corresponding path program 1 times [2025-03-08 17:33:14,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:14,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595045774] [2025-03-08 17:33:14,467 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:33:14,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:14,472 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 17:33:14,482 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:33:14,482 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:33:14,482 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:14,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:33:14,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:14,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595045774] [2025-03-08 17:33:14,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595045774] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:33:14,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176715622] [2025-03-08 17:33:14,576 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:33:14,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:14,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:33:14,579 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:33:14,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 17:33:14,620 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-08 17:33:14,635 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-08 17:33:14,636 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:33:14,636 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:14,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 17:33:14,640 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:33:14,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:33:14,669 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:33:14,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:33:14,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176715622] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-08 17:33:14,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-08 17:33:14,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2025-03-08 17:33:14,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116705565] [2025-03-08 17:33:14,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:33:14,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:33:14,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:14,696 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:33:14,696 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-03-08 17:33:14,701 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-08 17:33:14,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:14,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:14,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-08 17:33:14,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:14,764 INFO L124 PetriNetUnfolderBase]: 117/219 cut-off events. [2025-03-08 17:33:14,764 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2025-03-08 17:33:14,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 219 events. 117/219 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 684 event pairs, 35 based on Foata normal form. 0/204 useless extension candidates. Maximal degree in co-relation 563. Up to 113 conditions per place. [2025-03-08 17:33:14,765 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 26 selfloop transitions, 5 changer transitions 0/34 dead transitions. [2025-03-08 17:33:14,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 34 transitions, 186 flow [2025-03-08 17:33:14,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:33:14,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:33:14,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 49 transitions. [2025-03-08 17:33:14,769 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2025-03-08 17:33:14,769 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 91 flow. Second operand 5 states and 49 transitions. [2025-03-08 17:33:14,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 34 transitions, 186 flow [2025-03-08 17:33:14,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 34 transitions, 178 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-08 17:33:14,770 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 108 flow [2025-03-08 17:33:14,770 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2025-03-08 17:33:14,771 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 9 predicate places. [2025-03-08 17:33:14,771 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 108 flow [2025-03-08 17:33:14,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:14,771 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:14,771 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:33:14,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 17:33:14,976 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:14,976 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:33:14,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:14,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1519152560, now seen corresponding path program 1 times [2025-03-08 17:33:14,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:14,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852058292] [2025-03-08 17:33:14,977 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:33:14,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:14,985 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-08 17:33:15,003 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:33:15,003 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:33:15,003 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:15,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:33:15,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:15,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852058292] [2025-03-08 17:33:15,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852058292] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:33:15,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:33:15,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-08 17:33:15,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55345288] [2025-03-08 17:33:15,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:33:15,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 17:33:15,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:15,321 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 17:33:15,321 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-03-08 17:33:15,338 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-08 17:33:15,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 108 flow. Second operand has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:15,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:15,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-08 17:33:15,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:15,438 INFO L124 PetriNetUnfolderBase]: 128/254 cut-off events. [2025-03-08 17:33:15,438 INFO L125 PetriNetUnfolderBase]: For 189/189 co-relation queries the response was YES. [2025-03-08 17:33:15,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 751 conditions, 254 events. 128/254 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 858 event pairs, 29 based on Foata normal form. 1/252 useless extension candidates. Maximal degree in co-relation 727. Up to 157 conditions per place. [2025-03-08 17:33:15,441 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 30 selfloop transitions, 17 changer transitions 1/53 dead transitions. [2025-03-08 17:33:15,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 53 transitions, 311 flow [2025-03-08 17:33:15,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 17:33:15,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-08 17:33:15,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2025-03-08 17:33:15,442 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2025-03-08 17:33:15,442 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 108 flow. Second operand 7 states and 81 transitions. [2025-03-08 17:33:15,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 53 transitions, 311 flow [2025-03-08 17:33:15,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 53 transitions, 300 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-08 17:33:15,445 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 233 flow [2025-03-08 17:33:15,445 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=233, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2025-03-08 17:33:15,446 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 16 predicate places. [2025-03-08 17:33:15,447 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 233 flow [2025-03-08 17:33:15,447 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:15,447 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:15,447 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:33:15,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-08 17:33:15,448 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:33:15,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:15,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1525632578, now seen corresponding path program 2 times [2025-03-08 17:33:15,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:15,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316376918] [2025-03-08 17:33:15,448 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:33:15,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:15,458 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:33:15,474 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:33:15,474 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:33:15,474 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:15,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:15,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:15,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316376918] [2025-03-08 17:33:15,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316376918] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:33:15,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834403787] [2025-03-08 17:33:15,915 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:33:15,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:15,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:33:15,918 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:33:15,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 17:33:15,960 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:33:15,976 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:33:15,976 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:33:15,976 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:15,977 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 17:33:15,979 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:33:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:33:16,066 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:33:16,111 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:33:16,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 14 [2025-03-08 17:33:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:33:16,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834403787] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:33:16,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:33:16,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 13 [2025-03-08 17:33:16,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064138699] [2025-03-08 17:33:16,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:33:16,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 17:33:16,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:16,163 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 17:33:16,164 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2025-03-08 17:33:16,201 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-08 17:33:16,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 233 flow. Second operand has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:16,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:16,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-08 17:33:16,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:16,447 INFO L124 PetriNetUnfolderBase]: 167/331 cut-off events. [2025-03-08 17:33:16,447 INFO L125 PetriNetUnfolderBase]: For 516/520 co-relation queries the response was YES. [2025-03-08 17:33:16,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1175 conditions, 331 events. 167/331 cut-off events. For 516/520 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1281 event pairs, 28 based on Foata normal form. 5/332 useless extension candidates. Maximal degree in co-relation 1146. Up to 161 conditions per place. [2025-03-08 17:33:16,450 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 34 selfloop transitions, 34 changer transitions 1/74 dead transitions. [2025-03-08 17:33:16,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 74 transitions, 538 flow [2025-03-08 17:33:16,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 17:33:16,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-08 17:33:16,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2025-03-08 17:33:16,451 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45416666666666666 [2025-03-08 17:33:16,451 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 233 flow. Second operand 10 states and 109 transitions. [2025-03-08 17:33:16,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 74 transitions, 538 flow [2025-03-08 17:33:16,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 74 transitions, 516 flow, removed 10 selfloop flow, removed 1 redundant places. [2025-03-08 17:33:16,454 INFO L231 Difference]: Finished difference. Result has 50 places, 55 transitions, 414 flow [2025-03-08 17:33:16,454 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=414, PETRI_PLACES=50, PETRI_TRANSITIONS=55} [2025-03-08 17:33:16,455 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 25 predicate places. [2025-03-08 17:33:16,455 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 55 transitions, 414 flow [2025-03-08 17:33:16,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:16,455 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:16,455 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:33:16,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-08 17:33:16,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:16,659 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:33:16,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:16,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1806342762, now seen corresponding path program 3 times [2025-03-08 17:33:16,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:16,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578157190] [2025-03-08 17:33:16,660 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:33:16,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:16,666 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:33:16,686 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:33:16,687 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:33:16,687 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:17,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:17,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:17,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578157190] [2025-03-08 17:33:17,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578157190] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:33:17,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934708917] [2025-03-08 17:33:17,007 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:33:17,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:17,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:33:17,010 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:33:17,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 17:33:17,045 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:33:17,058 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:33:17,058 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:33:17,058 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:17,059 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-08 17:33:17,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:33:17,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:33:17,113 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:33:17,139 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:33:17,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2025-03-08 17:33:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:33:17,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934708917] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:33:17,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:33:17,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 13 [2025-03-08 17:33:17,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946196684] [2025-03-08 17:33:17,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:33:17,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 17:33:17,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:17,157 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 17:33:17,157 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2025-03-08 17:33:17,180 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-08 17:33:17,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 55 transitions, 414 flow. Second operand has 14 states, 14 states have (on average 7.357142857142857) internal successors, (103), 14 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:17,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:17,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-08 17:33:17,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:17,384 INFO L124 PetriNetUnfolderBase]: 224/460 cut-off events. [2025-03-08 17:33:17,384 INFO L125 PetriNetUnfolderBase]: For 978/978 co-relation queries the response was YES. [2025-03-08 17:33:17,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1748 conditions, 460 events. 224/460 cut-off events. For 978/978 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2103 event pairs, 34 based on Foata normal form. 1/460 useless extension candidates. Maximal degree in co-relation 1715. Up to 270 conditions per place. [2025-03-08 17:33:17,388 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 57 selfloop transitions, 29 changer transitions 1/92 dead transitions. [2025-03-08 17:33:17,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 92 transitions, 759 flow [2025-03-08 17:33:17,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 17:33:17,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-08 17:33:17,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2025-03-08 17:33:17,389 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4708333333333333 [2025-03-08 17:33:17,389 INFO L175 Difference]: Start difference. First operand has 50 places, 55 transitions, 414 flow. Second operand 10 states and 113 transitions. [2025-03-08 17:33:17,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 92 transitions, 759 flow [2025-03-08 17:33:17,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 92 transitions, 703 flow, removed 27 selfloop flow, removed 1 redundant places. [2025-03-08 17:33:17,395 INFO L231 Difference]: Finished difference. Result has 59 places, 67 transitions, 527 flow [2025-03-08 17:33:17,395 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=527, PETRI_PLACES=59, PETRI_TRANSITIONS=67} [2025-03-08 17:33:17,395 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 34 predicate places. [2025-03-08 17:33:17,395 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 67 transitions, 527 flow [2025-03-08 17:33:17,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.357142857142857) internal successors, (103), 14 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:17,396 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:17,396 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:33:17,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-08 17:33:17,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:17,597 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:33:17,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:17,598 INFO L85 PathProgramCache]: Analyzing trace with hash -712065166, now seen corresponding path program 4 times [2025-03-08 17:33:17,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:17,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450248478] [2025-03-08 17:33:17,598 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:33:17,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:17,605 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:33:17,622 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:33:17,622 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:33:17,622 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:17,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:33:17,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:17,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450248478] [2025-03-08 17:33:17,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450248478] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:33:17,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248741888] [2025-03-08 17:33:17,818 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:33:17,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:17,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:33:17,820 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:33:17,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 17:33:17,855 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:33:17,867 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:33:17,868 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:33:17,868 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:17,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-08 17:33:17,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:33:17,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:33:17,921 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:33:17,942 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:33:17,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 14 [2025-03-08 17:33:17,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:33:17,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248741888] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:33:17,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:33:17,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2025-03-08 17:33:17,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501329205] [2025-03-08 17:33:17,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:33:17,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 17:33:17,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:17,968 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 17:33:17,968 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-03-08 17:33:17,991 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-08 17:33:17,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 67 transitions, 527 flow. Second operand has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 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) [2025-03-08 17:33:17,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:17,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-08 17:33:17,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:18,128 INFO L124 PetriNetUnfolderBase]: 263/528 cut-off events. [2025-03-08 17:33:18,128 INFO L125 PetriNetUnfolderBase]: For 997/1003 co-relation queries the response was YES. [2025-03-08 17:33:18,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1992 conditions, 528 events. 263/528 cut-off events. For 997/1003 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2486 event pairs, 53 based on Foata normal form. 5/529 useless extension candidates. Maximal degree in co-relation 1955. Up to 381 conditions per place. [2025-03-08 17:33:18,134 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 66 selfloop transitions, 21 changer transitions 1/93 dead transitions. [2025-03-08 17:33:18,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 93 transitions, 820 flow [2025-03-08 17:33:18,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 17:33:18,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-08 17:33:18,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 91 transitions. [2025-03-08 17:33:18,135 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4739583333333333 [2025-03-08 17:33:18,135 INFO L175 Difference]: Start difference. First operand has 59 places, 67 transitions, 527 flow. Second operand 8 states and 91 transitions. [2025-03-08 17:33:18,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 93 transitions, 820 flow [2025-03-08 17:33:18,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 93 transitions, 804 flow, removed 6 selfloop flow, removed 2 redundant places. [2025-03-08 17:33:18,140 INFO L231 Difference]: Finished difference. Result has 67 places, 77 transitions, 650 flow [2025-03-08 17:33:18,141 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=650, PETRI_PLACES=67, PETRI_TRANSITIONS=77} [2025-03-08 17:33:18,141 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 42 predicate places. [2025-03-08 17:33:18,142 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 77 transitions, 650 flow [2025-03-08 17:33:18,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 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) [2025-03-08 17:33:18,142 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:18,142 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:33:18,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 17:33:18,342 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:18,343 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:33:18,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:18,343 INFO L85 PathProgramCache]: Analyzing trace with hash -123130484, now seen corresponding path program 5 times [2025-03-08 17:33:18,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:18,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173540034] [2025-03-08 17:33:18,343 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:33:18,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:18,350 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:33:18,362 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:33:18,362 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:33:18,362 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:18,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:18,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:18,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173540034] [2025-03-08 17:33:18,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173540034] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:33:18,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952512544] [2025-03-08 17:33:18,657 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:33:18,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:18,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:33:18,659 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:33:18,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 17:33:18,696 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:33:18,729 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:33:18,729 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:33:18,729 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:18,730 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-08 17:33:18,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:33:18,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:33:18,801 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:33:18,825 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:33:18,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 14 [2025-03-08 17:33:18,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:33:18,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952512544] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:33:18,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:33:18,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 15 [2025-03-08 17:33:18,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213465796] [2025-03-08 17:33:18,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:33:18,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-08 17:33:18,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:18,860 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-08 17:33:18,861 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2025-03-08 17:33:18,899 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-08 17:33:18,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 77 transitions, 650 flow. Second operand has 16 states, 16 states have (on average 7.375) internal successors, (118), 16 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:18,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:18,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-08 17:33:18,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:19,118 INFO L124 PetriNetUnfolderBase]: 297/601 cut-off events. [2025-03-08 17:33:19,118 INFO L125 PetriNetUnfolderBase]: For 1566/1570 co-relation queries the response was YES. [2025-03-08 17:33:19,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2429 conditions, 601 events. 297/601 cut-off events. For 1566/1570 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3001 event pairs, 58 based on Foata normal form. 5/602 useless extension candidates. Maximal degree in co-relation 2388. Up to 385 conditions per place. [2025-03-08 17:33:19,122 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 66 selfloop transitions, 36 changer transitions 1/108 dead transitions. [2025-03-08 17:33:19,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 108 transitions, 1027 flow [2025-03-08 17:33:19,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 17:33:19,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-08 17:33:19,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2025-03-08 17:33:19,123 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45 [2025-03-08 17:33:19,123 INFO L175 Difference]: Start difference. First operand has 67 places, 77 transitions, 650 flow. Second operand 10 states and 108 transitions. [2025-03-08 17:33:19,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 108 transitions, 1027 flow [2025-03-08 17:33:19,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 108 transitions, 1011 flow, removed 7 selfloop flow, removed 1 redundant places. [2025-03-08 17:33:19,128 INFO L231 Difference]: Finished difference. Result has 76 places, 90 transitions, 846 flow [2025-03-08 17:33:19,128 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=846, PETRI_PLACES=76, PETRI_TRANSITIONS=90} [2025-03-08 17:33:19,129 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 51 predicate places. [2025-03-08 17:33:19,129 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 90 transitions, 846 flow [2025-03-08 17:33:19,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.375) internal successors, (118), 16 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:19,129 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:19,129 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:33:19,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-08 17:33:19,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:19,333 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:33:19,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:19,333 INFO L85 PathProgramCache]: Analyzing trace with hash 764438140, now seen corresponding path program 6 times [2025-03-08 17:33:19,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:19,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312479848] [2025-03-08 17:33:19,334 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:33:19,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:19,339 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-03-08 17:33:19,344 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 20 of 21 statements. [2025-03-08 17:33:19,345 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-08 17:33:19,345 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:19,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:33:19,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:19,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312479848] [2025-03-08 17:33:19,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312479848] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:33:19,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:33:19,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2025-03-08 17:33:19,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263819050] [2025-03-08 17:33:19,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:33:19,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 17:33:19,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:19,502 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 17:33:19,502 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-03-08 17:33:19,528 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-08 17:33:19,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 90 transitions, 846 flow. Second operand has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:19,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:19,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-08 17:33:19,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:19,747 INFO L124 PetriNetUnfolderBase]: 378/756 cut-off events. [2025-03-08 17:33:19,748 INFO L125 PetriNetUnfolderBase]: For 2601/2605 co-relation queries the response was YES. [2025-03-08 17:33:19,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3305 conditions, 756 events. 378/756 cut-off events. For 2601/2605 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3995 event pairs, 70 based on Foata normal form. 5/755 useless extension candidates. Maximal degree in co-relation 3260. Up to 499 conditions per place. [2025-03-08 17:33:19,753 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 78 selfloop transitions, 43 changer transitions 1/127 dead transitions. [2025-03-08 17:33:19,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 127 transitions, 1369 flow [2025-03-08 17:33:19,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 17:33:19,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-08 17:33:19,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2025-03-08 17:33:19,754 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4675925925925926 [2025-03-08 17:33:19,754 INFO L175 Difference]: Start difference. First operand has 76 places, 90 transitions, 846 flow. Second operand 9 states and 101 transitions. [2025-03-08 17:33:19,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 127 transitions, 1369 flow [2025-03-08 17:33:19,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 127 transitions, 1303 flow, removed 31 selfloop flow, removed 2 redundant places. [2025-03-08 17:33:19,761 INFO L231 Difference]: Finished difference. Result has 85 places, 110 transitions, 1155 flow [2025-03-08 17:33:19,761 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1155, PETRI_PLACES=85, PETRI_TRANSITIONS=110} [2025-03-08 17:33:19,762 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 60 predicate places. [2025-03-08 17:33:19,762 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 110 transitions, 1155 flow [2025-03-08 17:33:19,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:19,762 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:19,762 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:33:19,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-08 17:33:19,763 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:33:19,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:19,763 INFO L85 PathProgramCache]: Analyzing trace with hash 63945152, now seen corresponding path program 7 times [2025-03-08 17:33:19,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:19,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746566637] [2025-03-08 17:33:19,763 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:33:19,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:19,767 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-08 17:33:19,773 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:33:19,773 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:33:19,773 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:19,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:19,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:19,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746566637] [2025-03-08 17:33:19,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746566637] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:33:19,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918845302] [2025-03-08 17:33:19,959 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:33:19,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:19,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:33:19,961 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:33:19,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 17:33:19,996 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-03-08 17:33:20,008 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-03-08 17:33:20,008 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:33:20,008 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:20,009 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-08 17:33:20,010 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:33:20,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:33:20,080 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 17:33:20,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918845302] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:33:20,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 17:33:20,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2025-03-08 17:33:20,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926561635] [2025-03-08 17:33:20,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:33:20,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:33:20,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:20,081 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:33:20,081 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2025-03-08 17:33:20,085 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-08 17:33:20,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 110 transitions, 1155 flow. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:20,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:20,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-08 17:33:20,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:20,220 INFO L124 PetriNetUnfolderBase]: 410/819 cut-off events. [2025-03-08 17:33:20,220 INFO L125 PetriNetUnfolderBase]: For 3333/3337 co-relation queries the response was YES. [2025-03-08 17:33:20,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3651 conditions, 819 events. 410/819 cut-off events. For 3333/3337 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4395 event pairs, 83 based on Foata normal form. 1/819 useless extension candidates. Maximal degree in co-relation 3602. Up to 573 conditions per place. [2025-03-08 17:33:20,226 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 96 selfloop transitions, 27 changer transitions 1/129 dead transitions. [2025-03-08 17:33:20,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 129 transitions, 1512 flow [2025-03-08 17:33:20,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:33:20,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:33:20,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 77 transitions. [2025-03-08 17:33:20,227 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5347222222222222 [2025-03-08 17:33:20,227 INFO L175 Difference]: Start difference. First operand has 85 places, 110 transitions, 1155 flow. Second operand 6 states and 77 transitions. [2025-03-08 17:33:20,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 129 transitions, 1512 flow [2025-03-08 17:33:20,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 129 transitions, 1496 flow, removed 7 selfloop flow, removed 1 redundant places. [2025-03-08 17:33:20,236 INFO L231 Difference]: Finished difference. Result has 91 places, 116 transitions, 1286 flow [2025-03-08 17:33:20,236 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1139, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1286, PETRI_PLACES=91, PETRI_TRANSITIONS=116} [2025-03-08 17:33:20,236 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 66 predicate places. [2025-03-08 17:33:20,237 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 116 transitions, 1286 flow [2025-03-08 17:33:20,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:20,237 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:20,237 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:33:20,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-08 17:33:20,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:20,438 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:33:20,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:20,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1392774386, now seen corresponding path program 8 times [2025-03-08 17:33:20,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:20,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574365005] [2025-03-08 17:33:20,438 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:33:20,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:20,443 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-08 17:33:20,449 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 17:33:20,449 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:33:20,449 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:33:20,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:20,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574365005] [2025-03-08 17:33:20,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574365005] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:33:20,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097622560] [2025-03-08 17:33:20,511 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:33:20,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:20,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:33:20,514 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:33:20,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 17:33:20,552 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-08 17:33:20,567 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 17:33:20,567 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:33:20,567 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:20,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 17:33:20,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:33:20,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:33:20,620 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:33:20,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:33:20,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097622560] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:33:20,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:33:20,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-08 17:33:20,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198318171] [2025-03-08 17:33:20,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:33:20,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 17:33:20,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:20,663 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 17:33:20,663 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2025-03-08 17:33:20,681 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-08 17:33:20,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 116 transitions, 1286 flow. Second operand has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:20,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:20,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-08 17:33:20,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:20,948 INFO L124 PetriNetUnfolderBase]: 916/1776 cut-off events. [2025-03-08 17:33:20,948 INFO L125 PetriNetUnfolderBase]: For 8093/8096 co-relation queries the response was YES. [2025-03-08 17:33:20,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8038 conditions, 1776 events. 916/1776 cut-off events. For 8093/8096 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 11064 event pairs, 409 based on Foata normal form. 64/1838 useless extension candidates. Maximal degree in co-relation 6960. Up to 935 conditions per place. [2025-03-08 17:33:20,960 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 207 selfloop transitions, 27 changer transitions 0/237 dead transitions. [2025-03-08 17:33:20,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 237 transitions, 3070 flow [2025-03-08 17:33:20,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 17:33:20,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-08 17:33:20,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2025-03-08 17:33:20,961 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2025-03-08 17:33:20,961 INFO L175 Difference]: Start difference. First operand has 91 places, 116 transitions, 1286 flow. Second operand 7 states and 81 transitions. [2025-03-08 17:33:20,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 237 transitions, 3070 flow [2025-03-08 17:33:20,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 237 transitions, 3034 flow, removed 18 selfloop flow, removed 0 redundant places. [2025-03-08 17:33:20,974 INFO L231 Difference]: Finished difference. Result has 101 places, 141 transitions, 1743 flow [2025-03-08 17:33:20,974 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1268, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1743, PETRI_PLACES=101, PETRI_TRANSITIONS=141} [2025-03-08 17:33:20,974 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 76 predicate places. [2025-03-08 17:33:20,975 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 141 transitions, 1743 flow [2025-03-08 17:33:20,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:20,975 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:20,975 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:33:20,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-08 17:33:21,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-08 17:33:21,176 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:33:21,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:21,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1117359341, now seen corresponding path program 9 times [2025-03-08 17:33:21,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:21,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390628368] [2025-03-08 17:33:21,176 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:33:21,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:21,181 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 2 equivalence classes. [2025-03-08 17:33:21,185 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 17:33:21,185 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:33:21,185 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:33:21,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:21,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390628368] [2025-03-08 17:33:21,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390628368] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:33:21,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036651199] [2025-03-08 17:33:21,240 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:33:21,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:21,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:33:21,242 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:33:21,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 17:33:21,278 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 2 equivalence classes. [2025-03-08 17:33:21,291 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-08 17:33:21,291 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:33:21,291 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:21,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 17:33:21,293 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:33:21,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:33:21,348 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:33:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:33:21,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036651199] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:33:21,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:33:21,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-08 17:33:21,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208112992] [2025-03-08 17:33:21,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:33:21,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 17:33:21,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:21,397 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 17:33:21,397 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2025-03-08 17:33:21,410 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-08 17:33:21,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 141 transitions, 1743 flow. Second operand has 14 states, 14 states have (on average 7.071428571428571) internal successors, (99), 14 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:21,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:21,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-08 17:33:21,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:21,626 INFO L124 PetriNetUnfolderBase]: 796/1549 cut-off events. [2025-03-08 17:33:21,626 INFO L125 PetriNetUnfolderBase]: For 8619/8655 co-relation queries the response was YES. [2025-03-08 17:33:21,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7515 conditions, 1549 events. 796/1549 cut-off events. For 8619/8655 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 9419 event pairs, 390 based on Foata normal form. 71/1619 useless extension candidates. Maximal degree in co-relation 6264. Up to 966 conditions per place. [2025-03-08 17:33:21,635 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 111 selfloop transitions, 3 changer transitions 85/202 dead transitions. [2025-03-08 17:33:21,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 202 transitions, 2814 flow [2025-03-08 17:33:21,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 17:33:21,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-08 17:33:21,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2025-03-08 17:33:21,636 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2025-03-08 17:33:21,636 INFO L175 Difference]: Start difference. First operand has 101 places, 141 transitions, 1743 flow. Second operand 7 states and 78 transitions. [2025-03-08 17:33:21,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 202 transitions, 2814 flow [2025-03-08 17:33:21,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 202 transitions, 2798 flow, removed 6 selfloop flow, removed 2 redundant places. [2025-03-08 17:33:21,655 INFO L231 Difference]: Finished difference. Result has 108 places, 117 transitions, 1370 flow [2025-03-08 17:33:21,655 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1716, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1370, PETRI_PLACES=108, PETRI_TRANSITIONS=117} [2025-03-08 17:33:21,656 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 83 predicate places. [2025-03-08 17:33:21,656 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 117 transitions, 1370 flow [2025-03-08 17:33:21,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.071428571428571) internal successors, (99), 14 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:21,656 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:21,656 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:33:21,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-08 17:33:21,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-08 17:33:21,860 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:33:21,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:21,861 INFO L85 PathProgramCache]: Analyzing trace with hash 584211404, now seen corresponding path program 10 times [2025-03-08 17:33:21,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:21,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574183062] [2025-03-08 17:33:21,861 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:33:21,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:21,867 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-03-08 17:33:21,868 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 19 of 25 statements. [2025-03-08 17:33:21,868 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 17:33:21,868 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:33:21,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:21,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574183062] [2025-03-08 17:33:21,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574183062] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:33:21,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576321089] [2025-03-08 17:33:21,896 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:33:21,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:21,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:33:21,898 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:33:21,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 17:33:21,936 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-03-08 17:33:21,943 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 19 of 25 statements. [2025-03-08 17:33:21,943 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-08 17:33:21,943 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:21,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 17:33:21,944 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:33:21,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:33:21,976 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:33:22,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:33:22,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576321089] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:33:22,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:33:22,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2025-03-08 17:33:22,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712250309] [2025-03-08 17:33:22,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:33:22,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-08 17:33:22,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:22,009 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-08 17:33:22,009 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2025-03-08 17:33:22,018 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-08 17:33:22,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 117 transitions, 1370 flow. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:22,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:22,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-08 17:33:22,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:22,389 INFO L124 PetriNetUnfolderBase]: 894/1533 cut-off events. [2025-03-08 17:33:22,389 INFO L125 PetriNetUnfolderBase]: For 7602/7602 co-relation queries the response was YES. [2025-03-08 17:33:22,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7544 conditions, 1533 events. 894/1533 cut-off events. For 7602/7602 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7822 event pairs, 63 based on Foata normal form. 11/1544 useless extension candidates. Maximal degree in co-relation 7490. Up to 418 conditions per place. [2025-03-08 17:33:22,402 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 178 selfloop transitions, 87 changer transitions 0/266 dead transitions. [2025-03-08 17:33:22,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 266 transitions, 3275 flow [2025-03-08 17:33:22,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 17:33:22,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-08 17:33:22,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 150 transitions. [2025-03-08 17:33:22,405 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2025-03-08 17:33:22,405 INFO L175 Difference]: Start difference. First operand has 108 places, 117 transitions, 1370 flow. Second operand 15 states and 150 transitions. [2025-03-08 17:33:22,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 266 transitions, 3275 flow [2025-03-08 17:33:22,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 266 transitions, 3069 flow, removed 100 selfloop flow, removed 9 redundant places. [2025-03-08 17:33:22,428 INFO L231 Difference]: Finished difference. Result has 114 places, 169 transitions, 2077 flow [2025-03-08 17:33:22,428 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1276, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2077, PETRI_PLACES=114, PETRI_TRANSITIONS=169} [2025-03-08 17:33:22,429 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 89 predicate places. [2025-03-08 17:33:22,429 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 169 transitions, 2077 flow [2025-03-08 17:33:22,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:22,429 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:22,429 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:33:22,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-08 17:33:22,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-08 17:33:22,631 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:33:22,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:22,632 INFO L85 PathProgramCache]: Analyzing trace with hash -619168809, now seen corresponding path program 11 times [2025-03-08 17:33:22,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:22,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346874076] [2025-03-08 17:33:22,632 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:33:22,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:22,636 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 25 statements into 3 equivalence classes. [2025-03-08 17:33:22,640 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 17:33:22,640 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-08 17:33:22,640 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:22,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:33:22,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:22,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346874076] [2025-03-08 17:33:22,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346874076] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:33:22,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606938747] [2025-03-08 17:33:22,694 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:33:22,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:22,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:33:22,698 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:33:22,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 17:33:22,738 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 25 statements into 3 equivalence classes. [2025-03-08 17:33:22,753 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 17:33:22,754 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-08 17:33:22,754 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:22,754 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-08 17:33:22,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:33:22,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:33:22,794 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:33:22,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:33:22,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606938747] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:33:22,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:33:22,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2025-03-08 17:33:22,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673914995] [2025-03-08 17:33:22,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:33:22,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 17:33:22,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:22,817 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 17:33:22,817 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2025-03-08 17:33:22,826 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-08 17:33:22,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 169 transitions, 2077 flow. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:22,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:22,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-08 17:33:22,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:23,089 INFO L124 PetriNetUnfolderBase]: 1109/1893 cut-off events. [2025-03-08 17:33:23,089 INFO L125 PetriNetUnfolderBase]: For 9994/9994 co-relation queries the response was YES. [2025-03-08 17:33:23,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10120 conditions, 1893 events. 1109/1893 cut-off events. For 9994/9994 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 10041 event pairs, 211 based on Foata normal form. 12/1905 useless extension candidates. Maximal degree in co-relation 10054. Up to 643 conditions per place. [2025-03-08 17:33:23,107 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 197 selfloop transitions, 59 changer transitions 5/262 dead transitions. [2025-03-08 17:33:23,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 262 transitions, 3499 flow [2025-03-08 17:33:23,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 17:33:23,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-08 17:33:23,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 94 transitions. [2025-03-08 17:33:23,109 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2025-03-08 17:33:23,109 INFO L175 Difference]: Start difference. First operand has 114 places, 169 transitions, 2077 flow. Second operand 8 states and 94 transitions. [2025-03-08 17:33:23,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 262 transitions, 3499 flow [2025-03-08 17:33:23,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 262 transitions, 3481 flow, removed 9 selfloop flow, removed 0 redundant places. [2025-03-08 17:33:23,137 INFO L231 Difference]: Finished difference. Result has 124 places, 189 transitions, 2477 flow [2025-03-08 17:33:23,137 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2065, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2477, PETRI_PLACES=124, PETRI_TRANSITIONS=189} [2025-03-08 17:33:23,138 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 99 predicate places. [2025-03-08 17:33:23,138 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 189 transitions, 2477 flow [2025-03-08 17:33:23,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:23,138 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:23,138 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:33:23,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-08 17:33:23,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-08 17:33:23,339 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:33:23,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:23,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1588584597, now seen corresponding path program 12 times [2025-03-08 17:33:23,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:23,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653962064] [2025-03-08 17:33:23,339 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:33:23,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:23,345 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 25 statements into 2 equivalence classes. [2025-03-08 17:33:23,359 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 17:33:23,360 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:33:23,360 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:23,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:33:23,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:23,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653962064] [2025-03-08 17:33:23,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653962064] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:33:23,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598663151] [2025-03-08 17:33:23,411 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:33:23,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:23,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:33:23,413 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:33:23,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-08 17:33:23,451 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 25 statements into 2 equivalence classes. [2025-03-08 17:33:23,465 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 17:33:23,465 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:33:23,466 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:23,467 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 17:33:23,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:33:23,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:33:23,513 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:33:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:33:23,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598663151] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:33:23,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:33:23,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-08 17:33:23,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965285803] [2025-03-08 17:33:23,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:33:23,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 17:33:23,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:23,557 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 17:33:23,557 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2025-03-08 17:33:23,573 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-08 17:33:23,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 189 transitions, 2477 flow. Second operand has 14 states, 14 states have (on average 6.5) internal successors, (91), 14 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:23,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:23,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-08 17:33:23,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:23,815 INFO L124 PetriNetUnfolderBase]: 755/1331 cut-off events. [2025-03-08 17:33:23,815 INFO L125 PetriNetUnfolderBase]: For 10222/10240 co-relation queries the response was YES. [2025-03-08 17:33:23,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7889 conditions, 1331 events. 755/1331 cut-off events. For 10222/10240 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 6955 event pairs, 78 based on Foata normal form. 106/1433 useless extension candidates. Maximal degree in co-relation 7819. Up to 572 conditions per place. [2025-03-08 17:33:23,825 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 134 selfloop transitions, 51 changer transitions 0/200 dead transitions. [2025-03-08 17:33:23,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 200 transitions, 2910 flow [2025-03-08 17:33:23,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 17:33:23,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-08 17:33:23,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 85 transitions. [2025-03-08 17:33:23,826 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39351851851851855 [2025-03-08 17:33:23,826 INFO L175 Difference]: Start difference. First operand has 124 places, 189 transitions, 2477 flow. Second operand 9 states and 85 transitions. [2025-03-08 17:33:23,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 200 transitions, 2910 flow [2025-03-08 17:33:23,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 200 transitions, 2718 flow, removed 26 selfloop flow, removed 10 redundant places. [2025-03-08 17:33:23,856 INFO L231 Difference]: Finished difference. Result has 120 places, 177 transitions, 2247 flow [2025-03-08 17:33:23,856 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2145, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2247, PETRI_PLACES=120, PETRI_TRANSITIONS=177} [2025-03-08 17:33:23,856 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 95 predicate places. [2025-03-08 17:33:23,856 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 177 transitions, 2247 flow [2025-03-08 17:33:23,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.5) internal successors, (91), 14 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:23,857 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:23,857 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:33:23,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-08 17:33:24,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-08 17:33:24,058 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:33:24,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:24,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1736493832, now seen corresponding path program 13 times [2025-03-08 17:33:24,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:24,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401089953] [2025-03-08 17:33:24,058 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:33:24,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:24,062 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-08 17:33:24,066 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 17:33:24,066 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:33:24,066 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 17:33:24,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:24,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401089953] [2025-03-08 17:33:24,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401089953] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:33:24,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184772477] [2025-03-08 17:33:24,128 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:33:24,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:24,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:33:24,133 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:33:24,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-08 17:33:24,176 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-08 17:33:24,192 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-08 17:33:24,192 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:33:24,192 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:24,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 17:33:24,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:33:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 17:33:24,263 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:33:24,323 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 17:33:24,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184772477] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:33:24,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:33:24,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-08 17:33:24,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493470203] [2025-03-08 17:33:24,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:33:24,324 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 17:33:24,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:24,324 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 17:33:24,324 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2025-03-08 17:33:24,343 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-08 17:33:24,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 177 transitions, 2247 flow. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:24,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:24,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-08 17:33:24,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:24,574 INFO L124 PetriNetUnfolderBase]: 735/1281 cut-off events. [2025-03-08 17:33:24,574 INFO L125 PetriNetUnfolderBase]: For 8854/8860 co-relation queries the response was YES. [2025-03-08 17:33:24,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7549 conditions, 1281 events. 735/1281 cut-off events. For 8854/8860 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6234 event pairs, 76 based on Foata normal form. 63/1343 useless extension candidates. Maximal degree in co-relation 7484. Up to 549 conditions per place. [2025-03-08 17:33:24,584 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 161 selfloop transitions, 52 changer transitions 0/218 dead transitions. [2025-03-08 17:33:24,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 218 transitions, 3125 flow [2025-03-08 17:33:24,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 17:33:24,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-08 17:33:24,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 82 transitions. [2025-03-08 17:33:24,585 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37962962962962965 [2025-03-08 17:33:24,585 INFO L175 Difference]: Start difference. First operand has 120 places, 177 transitions, 2247 flow. Second operand 9 states and 82 transitions. [2025-03-08 17:33:24,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 218 transitions, 3125 flow [2025-03-08 17:33:24,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 218 transitions, 2904 flow, removed 3 selfloop flow, removed 9 redundant places. [2025-03-08 17:33:24,603 INFO L231 Difference]: Finished difference. Result has 121 places, 188 transitions, 2335 flow [2025-03-08 17:33:24,604 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2000, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2335, PETRI_PLACES=121, PETRI_TRANSITIONS=188} [2025-03-08 17:33:24,604 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 96 predicate places. [2025-03-08 17:33:24,604 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 188 transitions, 2335 flow [2025-03-08 17:33:24,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:24,604 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:24,604 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:33:24,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-08 17:33:24,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-08 17:33:24,805 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:33:24,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:24,805 INFO L85 PathProgramCache]: Analyzing trace with hash -410925041, now seen corresponding path program 14 times [2025-03-08 17:33:24,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:24,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209054996] [2025-03-08 17:33:24,805 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:33:24,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:24,811 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:33:24,829 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:33:24,829 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:33:24,829 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:25,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:25,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:25,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209054996] [2025-03-08 17:33:25,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209054996] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:33:25,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225114586] [2025-03-08 17:33:25,281 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:33:25,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:25,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:33:25,283 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:33:25,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-08 17:33:25,322 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:33:25,337 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:33:25,338 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:33:25,338 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:25,338 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-03-08 17:33:25,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:33:25,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:33:25,545 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:33:25,672 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:33:25,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2025-03-08 17:33:25,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:33:25,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225114586] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:33:25,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:33:25,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 32 [2025-03-08 17:33:25,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655234827] [2025-03-08 17:33:25,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:33:25,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-08 17:33:25,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:25,748 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-08 17:33:25,749 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2025-03-08 17:33:25,865 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-08 17:33:25,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 188 transitions, 2335 flow. Second operand has 33 states, 33 states have (on average 5.9393939393939394) internal successors, (196), 33 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:25,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:25,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-08 17:33:25,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:26,971 INFO L124 PetriNetUnfolderBase]: 1042/1861 cut-off events. [2025-03-08 17:33:26,971 INFO L125 PetriNetUnfolderBase]: For 12273/12283 co-relation queries the response was YES. [2025-03-08 17:33:26,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10570 conditions, 1861 events. 1042/1861 cut-off events. For 12273/12283 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10074 event pairs, 16 based on Foata normal form. 11/1865 useless extension candidates. Maximal degree in co-relation 10505. Up to 852 conditions per place. [2025-03-08 17:33:26,983 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 182 selfloop transitions, 137 changer transitions 1/340 dead transitions. [2025-03-08 17:33:26,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 340 transitions, 4313 flow [2025-03-08 17:33:26,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-08 17:33:26,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-03-08 17:33:27,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 245 transitions. [2025-03-08 17:33:27,009 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2025-03-08 17:33:27,009 INFO L175 Difference]: Start difference. First operand has 121 places, 188 transitions, 2335 flow. Second operand 25 states and 245 transitions. [2025-03-08 17:33:27,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 340 transitions, 4313 flow [2025-03-08 17:33:27,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 340 transitions, 4270 flow, removed 9 selfloop flow, removed 6 redundant places. [2025-03-08 17:33:27,032 INFO L231 Difference]: Finished difference. Result has 148 places, 243 transitions, 3391 flow [2025-03-08 17:33:27,032 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2316, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3391, PETRI_PLACES=148, PETRI_TRANSITIONS=243} [2025-03-08 17:33:27,033 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 123 predicate places. [2025-03-08 17:33:27,033 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 243 transitions, 3391 flow [2025-03-08 17:33:27,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.9393939393939394) internal successors, (196), 33 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:27,033 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:27,033 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:33:27,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-08 17:33:27,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:27,237 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:33:27,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:27,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1293084655, now seen corresponding path program 15 times [2025-03-08 17:33:27,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:27,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996190755] [2025-03-08 17:33:27,238 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:33:27,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:27,242 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:33:27,252 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:33:27,252 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:33:27,252 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:27,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:27,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:27,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996190755] [2025-03-08 17:33:27,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996190755] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:33:27,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630937135] [2025-03-08 17:33:27,679 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:33:27,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:27,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:33:27,683 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:33:27,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-08 17:33:27,723 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:33:27,739 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:33:27,740 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:33:27,740 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:27,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-03-08 17:33:27,742 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:33:27,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 17:33:28,059 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:28,059 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:33:28,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2025-03-08 17:33:28,574 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:33:28,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 56 [2025-03-08 17:33:28,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:28,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630937135] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:33:28,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:33:28,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 39 [2025-03-08 17:33:28,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10728029] [2025-03-08 17:33:28,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:33:28,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-03-08 17:33:28,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:28,673 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-03-08 17:33:28,673 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1369, Unknown=0, NotChecked=0, Total=1560 [2025-03-08 17:33:28,699 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-08 17:33:28,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 243 transitions, 3391 flow. Second operand has 40 states, 40 states have (on average 4.65) internal successors, (186), 40 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:28,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:28,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-08 17:33:28,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:30,275 INFO L124 PetriNetUnfolderBase]: 1796/3031 cut-off events. [2025-03-08 17:33:30,275 INFO L125 PetriNetUnfolderBase]: For 24204/24204 co-relation queries the response was YES. [2025-03-08 17:33:30,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18957 conditions, 3031 events. 1796/3031 cut-off events. For 24204/24204 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 16726 event pairs, 37 based on Foata normal form. 1/3032 useless extension candidates. Maximal degree in co-relation 18884. Up to 1524 conditions per place. [2025-03-08 17:33:30,294 INFO L140 encePairwiseOnDemand]: 9/24 looper letters, 215 selfloop transitions, 314 changer transitions 2/532 dead transitions. [2025-03-08 17:33:30,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 532 transitions, 7553 flow [2025-03-08 17:33:30,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-03-08 17:33:30,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2025-03-08 17:33:30,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 301 transitions. [2025-03-08 17:33:30,296 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34837962962962965 [2025-03-08 17:33:30,296 INFO L175 Difference]: Start difference. First operand has 148 places, 243 transitions, 3391 flow. Second operand 36 states and 301 transitions. [2025-03-08 17:33:30,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 532 transitions, 7553 flow [2025-03-08 17:33:30,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 532 transitions, 7169 flow, removed 167 selfloop flow, removed 8 redundant places. [2025-03-08 17:33:30,353 INFO L231 Difference]: Finished difference. Result has 189 places, 428 transitions, 6761 flow [2025-03-08 17:33:30,354 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=3204, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=6761, PETRI_PLACES=189, PETRI_TRANSITIONS=428} [2025-03-08 17:33:30,354 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 164 predicate places. [2025-03-08 17:33:30,354 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 428 transitions, 6761 flow [2025-03-08 17:33:30,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.65) internal successors, (186), 40 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:30,355 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:30,355 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:33:30,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-08 17:33:30,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:30,555 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:33:30,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:30,556 INFO L85 PathProgramCache]: Analyzing trace with hash 583432593, now seen corresponding path program 16 times [2025-03-08 17:33:30,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:30,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662088377] [2025-03-08 17:33:30,556 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:33:30,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:30,561 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:33:30,569 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:33:30,569 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:33:30,570 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:30,984 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:30,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:30,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662088377] [2025-03-08 17:33:30,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662088377] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:33:30,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824674077] [2025-03-08 17:33:30,985 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:33:30,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:30,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:33:30,987 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:33:30,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-08 17:33:31,030 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:33:31,045 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:33:31,045 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:33:31,045 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:31,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-08 17:33:31,046 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:33:31,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:33:31,186 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:33:31,339 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:33:31,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2025-03-08 17:33:31,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:33:31,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824674077] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:33:31,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:33:31,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 27 [2025-03-08 17:33:31,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531172425] [2025-03-08 17:33:31,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:33:31,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-08 17:33:31,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:31,382 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-08 17:33:31,382 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2025-03-08 17:33:31,537 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-08 17:33:31,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 428 transitions, 6761 flow. Second operand has 28 states, 28 states have (on average 5.785714285714286) internal successors, (162), 28 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:31,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:31,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-08 17:33:31,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:33,254 INFO L124 PetriNetUnfolderBase]: 3333/5749 cut-off events. [2025-03-08 17:33:33,255 INFO L125 PetriNetUnfolderBase]: For 65104/65346 co-relation queries the response was YES. [2025-03-08 17:33:33,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42498 conditions, 5749 events. 3333/5749 cut-off events. For 65104/65346 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 36960 event pairs, 55 based on Foata normal form. 51/5739 useless extension candidates. Maximal degree in co-relation 42053. Up to 2779 conditions per place. [2025-03-08 17:33:33,294 INFO L140 encePairwiseOnDemand]: 12/24 looper letters, 549 selfloop transitions, 387 changer transitions 1/979 dead transitions. [2025-03-08 17:33:33,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 979 transitions, 16562 flow [2025-03-08 17:33:33,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-03-08 17:33:33,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2025-03-08 17:33:33,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 406 transitions. [2025-03-08 17:33:33,297 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41260162601626016 [2025-03-08 17:33:33,297 INFO L175 Difference]: Start difference. First operand has 189 places, 428 transitions, 6761 flow. Second operand 41 states and 406 transitions. [2025-03-08 17:33:33,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 979 transitions, 16562 flow [2025-03-08 17:33:33,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 979 transitions, 15679 flow, removed 371 selfloop flow, removed 11 redundant places. [2025-03-08 17:33:33,582 INFO L231 Difference]: Finished difference. Result has 232 places, 795 transitions, 13255 flow [2025-03-08 17:33:33,582 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=6426, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=13255, PETRI_PLACES=232, PETRI_TRANSITIONS=795} [2025-03-08 17:33:33,583 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 207 predicate places. [2025-03-08 17:33:33,583 INFO L471 AbstractCegarLoop]: Abstraction has has 232 places, 795 transitions, 13255 flow [2025-03-08 17:33:33,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.785714285714286) internal successors, (162), 28 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:33,583 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:33,583 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:33:33,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-08 17:33:33,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:33,783 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:33:33,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:33,784 INFO L85 PathProgramCache]: Analyzing trace with hash 395697771, now seen corresponding path program 17 times [2025-03-08 17:33:33,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:33,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999205990] [2025-03-08 17:33:33,784 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:33:33,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:33,789 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:33:33,798 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:33:33,798 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:33:33,798 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:34,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:34,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:34,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999205990] [2025-03-08 17:33:34,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999205990] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:33:34,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340848535] [2025-03-08 17:33:34,251 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:33:34,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:34,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:33:34,253 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:33:34,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-08 17:33:34,291 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:33:34,308 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:33:34,308 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:33:34,308 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:34,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-08 17:33:34,310 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:33:34,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:33:34,480 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:33:34,589 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:33:34,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2025-03-08 17:33:34,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:33:34,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340848535] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:33:34,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:33:34,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 27 [2025-03-08 17:33:34,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421789814] [2025-03-08 17:33:34,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:33:34,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-08 17:33:34,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:34,621 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-08 17:33:34,622 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2025-03-08 17:33:34,686 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-08 17:33:34,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 795 transitions, 13255 flow. Second operand has 28 states, 28 states have (on average 5.142857142857143) internal successors, (144), 28 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:34,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:34,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-08 17:33:34,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:36,530 INFO L124 PetriNetUnfolderBase]: 4123/6849 cut-off events. [2025-03-08 17:33:36,530 INFO L125 PetriNetUnfolderBase]: For 82067/82067 co-relation queries the response was YES. [2025-03-08 17:33:36,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53038 conditions, 6849 events. 4123/6849 cut-off events. For 82067/82067 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 42721 event pairs, 137 based on Foata normal form. 1/6850 useless extension candidates. Maximal degree in co-relation 52647. Up to 4341 conditions per place. [2025-03-08 17:33:36,586 INFO L140 encePairwiseOnDemand]: 12/24 looper letters, 558 selfloop transitions, 450 changer transitions 1/1010 dead transitions. [2025-03-08 17:33:36,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 1010 transitions, 18216 flow [2025-03-08 17:33:36,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-08 17:33:36,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-03-08 17:33:36,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 218 transitions. [2025-03-08 17:33:36,590 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36333333333333334 [2025-03-08 17:33:36,590 INFO L175 Difference]: Start difference. First operand has 232 places, 795 transitions, 13255 flow. Second operand 25 states and 218 transitions. [2025-03-08 17:33:36,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 1010 transitions, 18216 flow [2025-03-08 17:33:36,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 1010 transitions, 17186 flow, removed 488 selfloop flow, removed 5 redundant places. [2025-03-08 17:33:36,981 INFO L231 Difference]: Finished difference. Result has 260 places, 880 transitions, 15441 flow [2025-03-08 17:33:36,981 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=12239, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=380, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=15441, PETRI_PLACES=260, PETRI_TRANSITIONS=880} [2025-03-08 17:33:36,982 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 235 predicate places. [2025-03-08 17:33:36,982 INFO L471 AbstractCegarLoop]: Abstraction has has 260 places, 880 transitions, 15441 flow [2025-03-08 17:33:36,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.142857142857143) internal successors, (144), 28 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:36,982 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:36,982 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:33:36,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-08 17:33:37,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:37,183 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:33:37,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:37,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1528996037, now seen corresponding path program 18 times [2025-03-08 17:33:37,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:37,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257130733] [2025-03-08 17:33:37,183 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:33:37,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:37,187 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:33:37,193 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:33:37,194 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:33:37,194 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:37,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:37,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:37,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257130733] [2025-03-08 17:33:37,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257130733] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:33:37,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598944092] [2025-03-08 17:33:37,803 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:33:37,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:37,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:33:37,805 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:33:37,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-08 17:33:37,854 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:33:37,870 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:33:37,870 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:33:37,870 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:37,871 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-03-08 17:33:37,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:33:37,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 17:33:38,221 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:33:38,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2025-03-08 17:33:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:38,288 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:33:38,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2025-03-08 17:33:38,646 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:33:38,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 56 [2025-03-08 17:33:38,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:38,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598944092] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:33:38,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:33:38,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 42 [2025-03-08 17:33:38,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499794235] [2025-03-08 17:33:38,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:33:38,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-03-08 17:33:38,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:38,726 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-03-08 17:33:38,726 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1521, Unknown=0, NotChecked=0, Total=1806 [2025-03-08 17:33:38,746 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-08 17:33:38,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 880 transitions, 15441 flow. Second operand has 43 states, 43 states have (on average 4.6976744186046515) internal successors, (202), 43 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:38,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:38,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-08 17:33:38,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:41,704 INFO L124 PetriNetUnfolderBase]: 5044/8370 cut-off events. [2025-03-08 17:33:41,704 INFO L125 PetriNetUnfolderBase]: For 117488/117488 co-relation queries the response was YES. [2025-03-08 17:33:41,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68012 conditions, 8370 events. 5044/8370 cut-off events. For 117488/117488 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 54616 event pairs, 75 based on Foata normal form. 1/8371 useless extension candidates. Maximal degree in co-relation 67611. Up to 4140 conditions per place. [2025-03-08 17:33:41,786 INFO L140 encePairwiseOnDemand]: 10/24 looper letters, 487 selfloop transitions, 882 changer transitions 2/1372 dead transitions. [2025-03-08 17:33:41,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 1372 transitions, 26087 flow [2025-03-08 17:33:41,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2025-03-08 17:33:41,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2025-03-08 17:33:41,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 357 transitions. [2025-03-08 17:33:41,788 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34593023255813954 [2025-03-08 17:33:41,788 INFO L175 Difference]: Start difference. First operand has 260 places, 880 transitions, 15441 flow. Second operand 43 states and 357 transitions. [2025-03-08 17:33:41,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 1372 transitions, 26087 flow [2025-03-08 17:33:42,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 1372 transitions, 25689 flow, removed 120 selfloop flow, removed 13 redundant places. [2025-03-08 17:33:42,553 INFO L231 Difference]: Finished difference. Result has 303 places, 1221 transitions, 24732 flow [2025-03-08 17:33:42,554 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=15094, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=880, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=572, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=24732, PETRI_PLACES=303, PETRI_TRANSITIONS=1221} [2025-03-08 17:33:42,554 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 278 predicate places. [2025-03-08 17:33:42,555 INFO L471 AbstractCegarLoop]: Abstraction has has 303 places, 1221 transitions, 24732 flow [2025-03-08 17:33:42,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.6976744186046515) internal successors, (202), 43 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:42,555 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:42,555 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:33:42,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-08 17:33:42,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:42,755 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:33:42,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:42,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1765790141, now seen corresponding path program 19 times [2025-03-08 17:33:42,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:42,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988296115] [2025-03-08 17:33:42,756 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:33:42,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:42,761 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 17:33:42,766 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:33:42,766 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:33:42,766 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:43,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:43,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:43,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988296115] [2025-03-08 17:33:43,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988296115] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:33:43,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257065628] [2025-03-08 17:33:43,141 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:33:43,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:43,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:33:43,143 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:33:43,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-08 17:33:43,181 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 17:33:43,194 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:33:43,194 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:33:43,194 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:43,195 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-08 17:33:43,196 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:33:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:33:43,311 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:33:43,475 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:33:43,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2025-03-08 17:33:43,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:33:43,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257065628] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:33:43,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:33:43,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2025-03-08 17:33:43,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312676280] [2025-03-08 17:33:43,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:33:43,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-08 17:33:43,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:43,570 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-08 17:33:43,570 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2025-03-08 17:33:43,677 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-08 17:33:43,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 1221 transitions, 24732 flow. Second operand has 29 states, 29 states have (on average 5.827586206896552) internal successors, (169), 29 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:43,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:43,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-08 17:33:43,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:46,620 INFO L124 PetriNetUnfolderBase]: 5026/8603 cut-off events. [2025-03-08 17:33:46,620 INFO L125 PetriNetUnfolderBase]: For 168997/169061 co-relation queries the response was YES. [2025-03-08 17:33:46,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80328 conditions, 8603 events. 5026/8603 cut-off events. For 168997/169061 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 59653 event pairs, 110 based on Foata normal form. 15/8590 useless extension candidates. Maximal degree in co-relation 79977. Up to 4976 conditions per place. [2025-03-08 17:33:46,709 INFO L140 encePairwiseOnDemand]: 13/24 looper letters, 618 selfloop transitions, 710 changer transitions 1/1410 dead transitions. [2025-03-08 17:33:46,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 1410 transitions, 30868 flow [2025-03-08 17:33:46,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-08 17:33:46,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-03-08 17:33:46,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 219 transitions. [2025-03-08 17:33:46,710 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3967391304347826 [2025-03-08 17:33:46,710 INFO L175 Difference]: Start difference. First operand has 303 places, 1221 transitions, 24732 flow. Second operand 23 states and 219 transitions. [2025-03-08 17:33:46,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 1410 transitions, 30868 flow [2025-03-08 17:33:47,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 1410 transitions, 28940 flow, removed 836 selfloop flow, removed 20 redundant places. [2025-03-08 17:33:47,853 INFO L231 Difference]: Finished difference. Result has 312 places, 1325 transitions, 28066 flow [2025-03-08 17:33:47,854 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=23084, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=615, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=28066, PETRI_PLACES=312, PETRI_TRANSITIONS=1325} [2025-03-08 17:33:47,854 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 287 predicate places. [2025-03-08 17:33:47,854 INFO L471 AbstractCegarLoop]: Abstraction has has 312 places, 1325 transitions, 28066 flow [2025-03-08 17:33:47,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.827586206896552) internal successors, (169), 29 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:47,854 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:47,855 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:33:47,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-08 17:33:48,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:48,055 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:33:48,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:48,056 INFO L85 PathProgramCache]: Analyzing trace with hash -995232573, now seen corresponding path program 20 times [2025-03-08 17:33:48,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:48,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941564708] [2025-03-08 17:33:48,056 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:33:48,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:48,060 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:33:48,065 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:33:48,065 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:33:48,065 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:48,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:33:48,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:48,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941564708] [2025-03-08 17:33:48,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941564708] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:33:48,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703703350] [2025-03-08 17:33:48,443 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:33:48,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:48,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:33:48,445 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:33:48,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-08 17:33:48,489 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:33:48,504 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:33:48,504 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:33:48,505 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:48,506 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-03-08 17:33:48,507 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:33:48,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 17:33:48,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:48,743 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:33:48,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:33:48,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703703350] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:33:48,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:33:48,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 12] total 37 [2025-03-08 17:33:48,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380691795] [2025-03-08 17:33:48,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:33:48,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-03-08 17:33:48,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:48,984 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-03-08 17:33:48,985 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2025-03-08 17:33:49,005 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-08 17:33:49,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 1325 transitions, 28066 flow. Second operand has 38 states, 38 states have (on average 4.684210526315789) internal successors, (178), 38 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:49,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:49,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-08 17:33:49,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:53,834 INFO L124 PetriNetUnfolderBase]: 6076/10076 cut-off events. [2025-03-08 17:33:53,834 INFO L125 PetriNetUnfolderBase]: For 191904/191904 co-relation queries the response was YES. [2025-03-08 17:33:53,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94069 conditions, 10076 events. 6076/10076 cut-off events. For 191904/191904 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 68152 event pairs, 105 based on Foata normal form. 2/10078 useless extension candidates. Maximal degree in co-relation 93698. Up to 5326 conditions per place. [2025-03-08 17:33:53,972 INFO L140 encePairwiseOnDemand]: 9/24 looper letters, 531 selfloop transitions, 1251 changer transitions 4/1787 dead transitions. [2025-03-08 17:33:53,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 1787 transitions, 39070 flow [2025-03-08 17:33:53,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2025-03-08 17:33:53,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2025-03-08 17:33:53,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 530 transitions. [2025-03-08 17:33:53,974 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31547619047619047 [2025-03-08 17:33:53,974 INFO L175 Difference]: Start difference. First operand has 312 places, 1325 transitions, 28066 flow. Second operand 70 states and 530 transitions. [2025-03-08 17:33:53,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 1787 transitions, 39070 flow [2025-03-08 17:33:55,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 1787 transitions, 38175 flow, removed 278 selfloop flow, removed 13 redundant places. [2025-03-08 17:33:55,463 INFO L231 Difference]: Finished difference. Result has 388 places, 1663 transitions, 38263 flow [2025-03-08 17:33:55,464 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=27268, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=944, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=38263, PETRI_PLACES=388, PETRI_TRANSITIONS=1663} [2025-03-08 17:33:55,465 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 363 predicate places. [2025-03-08 17:33:55,465 INFO L471 AbstractCegarLoop]: Abstraction has has 388 places, 1663 transitions, 38263 flow [2025-03-08 17:33:55,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.684210526315789) internal successors, (178), 38 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:55,465 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:55,465 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:33:55,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-08 17:33:55,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-03-08 17:33:55,666 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:33:55,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:55,666 INFO L85 PathProgramCache]: Analyzing trace with hash -882159925, now seen corresponding path program 21 times [2025-03-08 17:33:55,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:55,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237908408] [2025-03-08 17:33:55,666 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:33:55,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:55,670 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:33:55,676 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:33:55,676 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:33:55,676 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:56,143 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:56,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:56,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237908408] [2025-03-08 17:33:56,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237908408] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:33:56,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917136166] [2025-03-08 17:33:56,143 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:33:56,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:56,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:33:56,145 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:33:56,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-08 17:33:56,184 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:33:56,198 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:33:56,198 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:33:56,198 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:56,199 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 46 conjuncts are in the unsatisfiable core [2025-03-08 17:33:56,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:33:56,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-08 17:33:56,648 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:33:56,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 14 [2025-03-08 17:33:56,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:56,701 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:33:57,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2025-03-08 17:33:57,242 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:33:57,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 56 [2025-03-08 17:33:57,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:57,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917136166] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:33:57,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:33:57,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 46 [2025-03-08 17:33:57,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155636600] [2025-03-08 17:33:57,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:33:57,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2025-03-08 17:33:57,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:57,337 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2025-03-08 17:33:57,338 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1887, Unknown=0, NotChecked=0, Total=2162 [2025-03-08 17:33:57,360 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-08 17:33:57,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 1663 transitions, 38263 flow. Second operand has 47 states, 47 states have (on average 4.595744680851064) internal successors, (216), 47 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:57,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:57,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-08 17:33:57,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:34:02,167 INFO L124 PetriNetUnfolderBase]: 6314/10484 cut-off events. [2025-03-08 17:34:02,168 INFO L125 PetriNetUnfolderBase]: For 223470/223470 co-relation queries the response was YES. [2025-03-08 17:34:02,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106925 conditions, 10484 events. 6314/10484 cut-off events. For 223470/223470 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 71392 event pairs, 81 based on Foata normal form. 1/10485 useless extension candidates. Maximal degree in co-relation 106497. Up to 5541 conditions per place. [2025-03-08 17:34:02,274 INFO L140 encePairwiseOnDemand]: 9/24 looper letters, 630 selfloop transitions, 1206 changer transitions 4/1841 dead transitions. [2025-03-08 17:34:02,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 1841 transitions, 44524 flow [2025-03-08 17:34:02,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-03-08 17:34:02,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2025-03-08 17:34:02,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 332 transitions. [2025-03-08 17:34:02,275 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32936507936507936 [2025-03-08 17:34:02,275 INFO L175 Difference]: Start difference. First operand has 388 places, 1663 transitions, 38263 flow. Second operand 42 states and 332 transitions. [2025-03-08 17:34:02,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 1841 transitions, 44524 flow [2025-03-08 17:34:04,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 1841 transitions, 43057 flow, removed 602 selfloop flow, removed 15 redundant places. [2025-03-08 17:34:04,640 INFO L231 Difference]: Finished difference. Result has 422 places, 1743 transitions, 42790 flow [2025-03-08 17:34:04,641 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=36826, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=42790, PETRI_PLACES=422, PETRI_TRANSITIONS=1743} [2025-03-08 17:34:04,642 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 397 predicate places. [2025-03-08 17:34:04,642 INFO L471 AbstractCegarLoop]: Abstraction has has 422 places, 1743 transitions, 42790 flow [2025-03-08 17:34:04,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 4.595744680851064) internal successors, (216), 47 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:34:04,642 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:34:04,642 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:34:04,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-08 17:34:04,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-03-08 17:34:04,843 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:34:04,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:34:04,844 INFO L85 PathProgramCache]: Analyzing trace with hash 77852807, now seen corresponding path program 22 times [2025-03-08 17:34:04,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:34:04,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231460050] [2025-03-08 17:34:04,844 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:34:04,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:34:04,849 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:34:04,861 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:34:04,861 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:34:04,861 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:34:05,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:34:05,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:34:05,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231460050] [2025-03-08 17:34:05,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231460050] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:34:05,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012005967] [2025-03-08 17:34:05,276 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:34:05,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:34:05,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:34:05,277 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:34:05,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-08 17:34:05,319 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:34:05,335 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:34:05,335 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:34:05,335 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:34:05,336 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-08 17:34:05,337 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:34:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:34:05,478 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:34:05,607 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:34:05,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2025-03-08 17:34:05,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:34:05,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012005967] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:34:05,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:34:05,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 30 [2025-03-08 17:34:05,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26735497] [2025-03-08 17:34:05,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:34:05,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-08 17:34:05,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:34:05,648 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-08 17:34:05,648 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2025-03-08 17:34:05,666 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-08 17:34:05,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 1743 transitions, 42790 flow. Second operand has 31 states, 31 states have (on average 5.032258064516129) internal successors, (156), 31 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:34:05,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:34:05,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-08 17:34:05,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:34:10,359 INFO L124 PetriNetUnfolderBase]: 6763/11232 cut-off events. [2025-03-08 17:34:10,359 INFO L125 PetriNetUnfolderBase]: For 278024/278024 co-relation queries the response was YES. [2025-03-08 17:34:10,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120902 conditions, 11232 events. 6763/11232 cut-off events. For 278024/278024 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 77485 event pairs, 265 based on Foata normal form. 1/11233 useless extension candidates. Maximal degree in co-relation 120772. Up to 6976 conditions per place. [2025-03-08 17:34:10,498 INFO L140 encePairwiseOnDemand]: 12/24 looper letters, 1152 selfloop transitions, 914 changer transitions 1/2068 dead transitions. [2025-03-08 17:34:10,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 2068 transitions, 53336 flow [2025-03-08 17:34:10,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-03-08 17:34:10,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2025-03-08 17:34:10,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 240 transitions. [2025-03-08 17:34:10,499 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2025-03-08 17:34:10,499 INFO L175 Difference]: Start difference. First operand has 422 places, 1743 transitions, 42790 flow. Second operand 30 states and 240 transitions. [2025-03-08 17:34:10,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 2068 transitions, 53336 flow [2025-03-08 17:34:13,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 2068 transitions, 52210 flow, removed 183 selfloop flow, removed 31 redundant places. [2025-03-08 17:34:13,799 INFO L231 Difference]: Finished difference. Result has 428 places, 1904 transitions, 49249 flow [2025-03-08 17:34:13,800 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=41850, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=755, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=902, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=49249, PETRI_PLACES=428, PETRI_TRANSITIONS=1904} [2025-03-08 17:34:13,800 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 403 predicate places. [2025-03-08 17:34:13,800 INFO L471 AbstractCegarLoop]: Abstraction has has 428 places, 1904 transitions, 49249 flow [2025-03-08 17:34:13,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.032258064516129) internal successors, (156), 31 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:34:13,800 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:34:13,800 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:34:13,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-03-08 17:34:14,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-03-08 17:34:14,001 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:34:14,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:34:14,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1339522253, now seen corresponding path program 23 times [2025-03-08 17:34:14,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:34:14,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382666873] [2025-03-08 17:34:14,001 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:34:14,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:34:14,005 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 3 equivalence classes. [2025-03-08 17:34:14,009 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:34:14,010 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-08 17:34:14,010 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:34:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:34:14,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:34:14,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382666873] [2025-03-08 17:34:14,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382666873] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:34:14,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807648579] [2025-03-08 17:34:14,202 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:34:14,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:34:14,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:34:14,204 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:34:14,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-08 17:34:14,251 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 28 statements into 3 equivalence classes. [2025-03-08 17:34:14,266 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:34:14,266 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-08 17:34:14,266 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:34:14,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-08 17:34:14,268 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:34:14,372 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:34:14,373 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:34:14,435 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:34:14,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2025-03-08 17:34:14,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:34:14,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807648579] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:34:14,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:34:14,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 18 [2025-03-08 17:34:14,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051212678] [2025-03-08 17:34:14,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:34:14,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-08 17:34:14,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:34:14,467 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-08 17:34:14,467 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2025-03-08 17:34:14,539 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2025-03-08 17:34:14,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 1904 transitions, 49249 flow. Second operand has 19 states, 19 states have (on average 6.842105263157895) internal successors, (130), 19 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:34:14,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:34:14,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2025-03-08 17:34:14,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:34:18,552 INFO L124 PetriNetUnfolderBase]: 6089/10747 cut-off events. [2025-03-08 17:34:18,552 INFO L125 PetriNetUnfolderBase]: For 344357/344360 co-relation queries the response was YES. [2025-03-08 17:34:18,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127673 conditions, 10747 events. 6089/10747 cut-off events. For 344357/344360 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 80681 event pairs, 154 based on Foata normal form. 4/10708 useless extension candidates. Maximal degree in co-relation 127216. Up to 7844 conditions per place. [2025-03-08 17:34:18,674 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 1489 selfloop transitions, 191 changer transitions 1/2033 dead transitions. [2025-03-08 17:34:18,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 2033 transitions, 55608 flow [2025-03-08 17:34:18,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 17:34:18,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-08 17:34:18,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 132 transitions. [2025-03-08 17:34:18,675 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2025-03-08 17:34:18,675 INFO L175 Difference]: Start difference. First operand has 428 places, 1904 transitions, 49249 flow. Second operand 12 states and 132 transitions. [2025-03-08 17:34:18,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 2033 transitions, 55608 flow [2025-03-08 17:34:22,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 2033 transitions, 55446 flow, removed 52 selfloop flow, removed 5 redundant places. [2025-03-08 17:34:22,264 INFO L231 Difference]: Finished difference. Result has 438 places, 1984 transitions, 52239 flow [2025-03-08 17:34:22,265 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=49095, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1904, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1722, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=52239, PETRI_PLACES=438, PETRI_TRANSITIONS=1984} [2025-03-08 17:34:22,267 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 413 predicate places. [2025-03-08 17:34:22,268 INFO L471 AbstractCegarLoop]: Abstraction has has 438 places, 1984 transitions, 52239 flow [2025-03-08 17:34:22,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.842105263157895) internal successors, (130), 19 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:34:22,268 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:34:22,268 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:34:22,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-08 17:34:22,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:34:22,470 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:34:22,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:34:22,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1880198575, now seen corresponding path program 24 times [2025-03-08 17:34:22,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:34:22,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132718002] [2025-03-08 17:34:22,471 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:34:22,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:34:22,477 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:34:22,484 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:34:22,485 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:34:22,485 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:34:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:34:22,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:34:22,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132718002] [2025-03-08 17:34:22,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132718002] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:34:22,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553661428] [2025-03-08 17:34:22,746 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:34:22,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:34:22,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:34:22,748 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:34:22,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-08 17:34:22,794 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 28 statements into 2 equivalence classes. [2025-03-08 17:34:22,808 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:34:22,808 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-08 17:34:22,809 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:34:22,810 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-03-08 17:34:22,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:34:22,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 17:34:22,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:34:22,938 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:34:23,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:34:23,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553661428] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:34:23,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:34:23,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 9] total 27 [2025-03-08 17:34:23,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166671507] [2025-03-08 17:34:23,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:34:23,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-08 17:34:23,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:34:23,116 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-08 17:34:23,116 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2025-03-08 17:34:23,124 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-03-08 17:34:23,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 1984 transitions, 52239 flow. Second operand has 28 states, 28 states have (on average 5.214285714285714) internal successors, (146), 28 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:34:23,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:34:23,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-03-08 17:34:23,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:34:29,369 INFO L124 PetriNetUnfolderBase]: 7753/12862 cut-off events. [2025-03-08 17:34:29,369 INFO L125 PetriNetUnfolderBase]: For 357696/357696 co-relation queries the response was YES. [2025-03-08 17:34:29,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146752 conditions, 12862 events. 7753/12862 cut-off events. For 357696/357696 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 89905 event pairs, 178 based on Foata normal form. 2/12864 useless extension candidates. Maximal degree in co-relation 146246. Up to 8663 conditions per place. [2025-03-08 17:34:29,507 INFO L140 encePairwiseOnDemand]: 10/24 looper letters, 1235 selfloop transitions, 1171 changer transitions 2/2409 dead transitions. [2025-03-08 17:34:29,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 2409 transitions, 66811 flow [2025-03-08 17:34:29,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-03-08 17:34:29,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2025-03-08 17:34:29,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 332 transitions. [2025-03-08 17:34:29,509 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33739837398373984 [2025-03-08 17:34:29,509 INFO L175 Difference]: Start difference. First operand has 438 places, 1984 transitions, 52239 flow. Second operand 41 states and 332 transitions. [2025-03-08 17:34:29,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 2409 transitions, 66811 flow [2025-03-08 17:34:33,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 2409 transitions, 66607 flow, removed 45 selfloop flow, removed 6 redundant places. [2025-03-08 17:34:33,917 INFO L231 Difference]: Finished difference. Result has 489 places, 2248 transitions, 64024 flow [2025-03-08 17:34:33,919 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=52053, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1984, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=933, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=955, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=64024, PETRI_PLACES=489, PETRI_TRANSITIONS=2248} [2025-03-08 17:34:33,919 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 464 predicate places. [2025-03-08 17:34:33,919 INFO L471 AbstractCegarLoop]: Abstraction has has 489 places, 2248 transitions, 64024 flow [2025-03-08 17:34:33,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.214285714285714) internal successors, (146), 28 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:34:33,920 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:34:33,920 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:34:33,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2025-03-08 17:34:34,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-03-08 17:34:34,124 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-08 17:34:34,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:34:34,124 INFO L85 PathProgramCache]: Analyzing trace with hash 305457045, now seen corresponding path program 25 times [2025-03-08 17:34:34,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:34:34,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62920185] [2025-03-08 17:34:34,124 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:34:34,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:34:34,128 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 17:34:34,134 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:34:34,134 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:34:34,134 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:34:34,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:34:34,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:34:34,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62920185] [2025-03-08 17:34:34,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62920185] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:34:34,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273274367] [2025-03-08 17:34:34,482 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:34:34,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:34:34,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:34:34,483 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:34:34,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-08 17:34:34,523 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-08 17:34:34,535 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-08 17:34:34,535 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:34:34,535 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:34:34,536 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-08 17:34:34,537 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:34:34,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:34:34,662 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:34:34,774 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:34:34,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2025-03-08 17:34:34,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:34:34,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273274367] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:34:34,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:34:34,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 28 [2025-03-08 17:34:34,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683914700] [2025-03-08 17:34:34,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:34:34,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-08 17:34:34,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:34:34,802 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-08 17:34:34,802 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2025-03-08 17:34:34,881 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 24 [2025-03-08 17:34:34,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 2248 transitions, 64024 flow. Second operand has 29 states, 29 states have (on average 5.931034482758621) internal successors, (172), 29 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:34:34,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:34:34,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 24 [2025-03-08 17:34:34,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:34:41,161 INFO L124 PetriNetUnfolderBase]: 7315/12497 cut-off events. [2025-03-08 17:34:41,162 INFO L125 PetriNetUnfolderBase]: For 441258/441272 co-relation queries the response was YES. [2025-03-08 17:34:41,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156612 conditions, 12497 events. 7315/12497 cut-off events. For 441258/441272 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 91280 event pairs, 138 based on Foata normal form. 1/12478 useless extension candidates. Maximal degree in co-relation 156043. Up to 9948 conditions per place. [2025-03-08 17:34:41,312 INFO L140 encePairwiseOnDemand]: 12/24 looper letters, 1794 selfloop transitions, 394 changer transitions 1/2397 dead transitions. [2025-03-08 17:34:41,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 2397 transitions, 71735 flow [2025-03-08 17:34:41,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-08 17:34:41,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-08 17:34:41,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 197 transitions. [2025-03-08 17:34:41,314 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39087301587301587 [2025-03-08 17:34:41,314 INFO L175 Difference]: Start difference. First operand has 489 places, 2248 transitions, 64024 flow. Second operand 21 states and 197 transitions. [2025-03-08 17:34:41,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 2397 transitions, 71735 flow