./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 735b3cc8 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-more-array-sum-alt2.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 1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a --- Real Ultimate output --- This is Ultimate 0.3.0-?-735b3cc-m [2025-03-14 01:06:45,896 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-14 01:06:45,956 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-14 01:06:45,964 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-14 01:06:45,964 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-14 01:06:45,985 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-14 01:06:45,985 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-14 01:06:45,986 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-14 01:06:45,986 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-14 01:06:45,986 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-14 01:06:45,987 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-14 01:06:45,987 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-14 01:06:45,987 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-14 01:06:45,987 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-14 01:06:45,988 INFO L153 SettingsManager]: * Use SBE=true [2025-03-14 01:06:45,988 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-14 01:06:45,988 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-14 01:06:45,988 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-14 01:06:45,988 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-14 01:06:45,989 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-14 01:06:45,989 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-14 01:06:45,989 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-14 01:06:45,989 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-14 01:06:45,989 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-14 01:06:45,989 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-14 01:06:45,989 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-14 01:06:45,989 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-14 01:06:45,989 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-14 01:06:45,989 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-14 01:06:45,989 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-14 01:06:45,989 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-14 01:06:45,990 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-14 01:06:45,990 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-14 01:06:45,990 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-14 01:06:45,990 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-14 01:06:45,990 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-14 01:06:45,990 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-14 01:06:45,990 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-14 01:06:45,990 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-14 01:06:45,990 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-14 01:06:45,990 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-14 01:06:45,990 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-14 01:06:45,990 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-14 01:06:45,991 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 -> 1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a [2025-03-14 01:06:46,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-14 01:06:46,199 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-14 01:06:46,202 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-14 01:06:46,202 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-14 01:06:46,202 INFO L274 PluginConnector]: CDTParser initialized [2025-03-14 01:06:46,203 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2025-03-14 01:06:47,303 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e40908b40/75c75c4511ad4be8b65f3c91eb5db508/FLAG58d0f2527 [2025-03-14 01:06:47,542 INFO L384 CDTParser]: Found 1 translation units. [2025-03-14 01:06:47,543 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2025-03-14 01:06:47,548 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e40908b40/75c75c4511ad4be8b65f3c91eb5db508/FLAG58d0f2527 [2025-03-14 01:06:47,883 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e40908b40/75c75c4511ad4be8b65f3c91eb5db508 [2025-03-14 01:06:47,885 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-14 01:06:47,886 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-14 01:06:47,887 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-14 01:06:47,887 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-14 01:06:47,890 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-14 01:06:47,890 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.03 01:06:47" (1/1) ... [2025-03-14 01:06:47,891 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41f9ca31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:06:47, skipping insertion in model container [2025-03-14 01:06:47,891 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.03 01:06:47" (1/1) ... [2025-03-14 01:06:47,903 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-14 01:06:48,036 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-more-array-sum-alt2.wvr.c[2564,2577] [2025-03-14 01:06:48,045 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-14 01:06:48,054 INFO L200 MainTranslator]: Completed pre-run [2025-03-14 01:06:48,068 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-more-array-sum-alt2.wvr.c[2564,2577] [2025-03-14 01:06:48,075 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-14 01:06:48,090 INFO L204 MainTranslator]: Completed translation [2025-03-14 01:06:48,092 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:06:48 WrapperNode [2025-03-14 01:06:48,092 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-14 01:06:48,093 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-14 01:06:48,093 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-14 01:06:48,093 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-14 01:06:48,098 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:06:48" (1/1) ... [2025-03-14 01:06:48,104 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:06:48" (1/1) ... [2025-03-14 01:06:48,126 INFO L138 Inliner]: procedures = 24, calls = 30, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 170 [2025-03-14 01:06:48,128 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-14 01:06:48,129 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-14 01:06:48,130 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-14 01:06:48,130 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-14 01:06:48,136 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:06:48" (1/1) ... [2025-03-14 01:06:48,136 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:06:48" (1/1) ... [2025-03-14 01:06:48,142 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:06:48" (1/1) ... [2025-03-14 01:06:48,156 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 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]. [2025-03-14 01:06:48,156 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:06:48" (1/1) ... [2025-03-14 01:06:48,156 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:06:48" (1/1) ... [2025-03-14 01:06:48,162 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:06:48" (1/1) ... [2025-03-14 01:06:48,167 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:06:48" (1/1) ... [2025-03-14 01:06:48,168 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:06:48" (1/1) ... [2025-03-14 01:06:48,169 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:06:48" (1/1) ... [2025-03-14 01:06:48,170 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-14 01:06:48,173 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-14 01:06:48,173 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-14 01:06:48,173 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-14 01:06:48,174 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:06:48" (1/1) ... [2025-03-14 01:06:48,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-14 01:06:48,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:06:48,199 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) [2025-03-14 01:06:48,201 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 [2025-03-14 01:06:48,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-14 01:06:48,221 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-14 01:06:48,221 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-14 01:06:48,221 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-14 01:06:48,221 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-14 01:06:48,221 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-14 01:06:48,221 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-14 01:06:48,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-14 01:06:48,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-14 01:06:48,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-14 01:06:48,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-14 01:06:48,222 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-14 01:06:48,222 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-14 01:06:48,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-14 01:06:48,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-14 01:06:48,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-14 01:06:48,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-14 01:06:48,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-14 01:06:48,223 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-14 01:06:48,300 INFO L256 CfgBuilder]: Building ICFG [2025-03-14 01:06:48,302 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-14 01:06:48,532 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-14 01:06:48,532 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-14 01:06:48,532 INFO L318 CfgBuilder]: Performing block encoding [2025-03-14 01:06:48,753 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-14 01:06:48,754 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.03 01:06:48 BoogieIcfgContainer [2025-03-14 01:06:48,754 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-14 01:06:48,755 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-14 01:06:48,755 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-14 01:06:48,759 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-14 01:06:48,759 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.03 01:06:47" (1/3) ... [2025-03-14 01:06:48,760 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd8defa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.03 01:06:48, skipping insertion in model container [2025-03-14 01:06:48,760 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 01:06:48" (2/3) ... [2025-03-14 01:06:48,760 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd8defa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.03 01:06:48, skipping insertion in model container [2025-03-14 01:06:48,760 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.03 01:06:48" (3/3) ... [2025-03-14 01:06:48,761 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt2.wvr.c [2025-03-14 01:06:48,770 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-14 01:06:48,771 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-array-sum-alt2.wvr.c that has 4 procedures, 30 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2025-03-14 01:06:48,772 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-14 01:06:48,814 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-03-14 01:06:48,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 33 transitions, 87 flow [2025-03-14 01:06:48,857 INFO L124 PetriNetUnfolderBase]: 4/30 cut-off events. [2025-03-14 01:06:48,858 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-14 01:06:48,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 30 events. 4/30 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 37 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2025-03-14 01:06:48,860 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 33 transitions, 87 flow [2025-03-14 01:06:48,863 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 29 transitions, 76 flow [2025-03-14 01:06:48,871 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-14 01:06:48,879 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;@150c4ba6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-14 01:06:48,880 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-14 01:06:48,887 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-14 01:06:48,887 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2025-03-14 01:06:48,887 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-14 01:06:48,887 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:06:48,887 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 01:06:48,888 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:06:48,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:06:48,891 INFO L85 PathProgramCache]: Analyzing trace with hash 798047629, now seen corresponding path program 1 times [2025-03-14 01:06:48,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:06:48,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953814106] [2025-03-14 01:06:48,896 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:06:48,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:06:48,951 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-14 01:06:48,977 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-14 01:06:48,978 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:06:48,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:06:49,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:06:49,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:06:49,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953814106] [2025-03-14 01:06:49,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953814106] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:06:49,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:06:49,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-14 01:06:49,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808730262] [2025-03-14 01:06:49,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:06:49,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-14 01:06:49,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:06:49,195 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-14 01:06:49,196 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-14 01:06:49,197 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 33 [2025-03-14 01:06:49,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:49,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:06:49,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 33 [2025-03-14 01:06:49,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:06:49,396 INFO L124 PetriNetUnfolderBase]: 617/956 cut-off events. [2025-03-14 01:06:49,397 INFO L125 PetriNetUnfolderBase]: For 87/87 co-relation queries the response was YES. [2025-03-14 01:06:49,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1951 conditions, 956 events. 617/956 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3850 event pairs, 126 based on Foata normal form. 1/952 useless extension candidates. Maximal degree in co-relation 1717. Up to 677 conditions per place. [2025-03-14 01:06:49,409 INFO L140 encePairwiseOnDemand]: 28/33 looper letters, 37 selfloop transitions, 4 changer transitions 1/46 dead transitions. [2025-03-14 01:06:49,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 209 flow [2025-03-14 01:06:49,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-14 01:06:49,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-14 01:06:49,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2025-03-14 01:06:49,418 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6464646464646465 [2025-03-14 01:06:49,420 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 76 flow. Second operand 3 states and 64 transitions. [2025-03-14 01:06:49,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 209 flow [2025-03-14 01:06:49,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 46 transitions, 187 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-14 01:06:49,427 INFO L231 Difference]: Finished difference. Result has 32 places, 32 transitions, 90 flow [2025-03-14 01:06:49,429 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=32, PETRI_TRANSITIONS=32} [2025-03-14 01:06:49,431 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, -3 predicate places. [2025-03-14 01:06:49,431 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 32 transitions, 90 flow [2025-03-14 01:06:49,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:49,432 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:06:49,432 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, 1] [2025-03-14 01:06:49,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-14 01:06:49,432 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:06:49,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:06:49,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1287002738, now seen corresponding path program 1 times [2025-03-14 01:06:49,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:06:49,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323869019] [2025-03-14 01:06:49,433 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:06:49,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:06:49,445 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-14 01:06:49,461 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-14 01:06:49,461 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:06:49,461 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:06:49,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:06:49,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:06:49,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323869019] [2025-03-14 01:06:49,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323869019] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:06:49,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:06:49,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-14 01:06:49,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410905783] [2025-03-14 01:06:49,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:06:49,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-14 01:06:49,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:06:49,569 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-14 01:06:49,569 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-14 01:06:49,577 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-03-14 01:06:49,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 32 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:49,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:06:49,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-03-14 01:06:49,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:06:49,812 INFO L124 PetriNetUnfolderBase]: 1206/1894 cut-off events. [2025-03-14 01:06:49,812 INFO L125 PetriNetUnfolderBase]: For 348/348 co-relation queries the response was YES. [2025-03-14 01:06:49,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4216 conditions, 1894 events. 1206/1894 cut-off events. For 348/348 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 9229 event pairs, 745 based on Foata normal form. 0/1822 useless extension candidates. Maximal degree in co-relation 1088. Up to 1120 conditions per place. [2025-03-14 01:06:49,823 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 63 selfloop transitions, 5 changer transitions 0/71 dead transitions. [2025-03-14 01:06:49,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 71 transitions, 334 flow [2025-03-14 01:06:49,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-14 01:06:49,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-14 01:06:49,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2025-03-14 01:06:49,826 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5575757575757576 [2025-03-14 01:06:49,826 INFO L175 Difference]: Start difference. First operand has 32 places, 32 transitions, 90 flow. Second operand 5 states and 92 transitions. [2025-03-14 01:06:49,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 71 transitions, 334 flow [2025-03-14 01:06:49,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 71 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-14 01:06:49,829 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 122 flow [2025-03-14 01:06:49,829 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2025-03-14 01:06:49,830 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2025-03-14 01:06:49,830 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 122 flow [2025-03-14 01:06:49,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:49,831 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:06:49,831 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, 1] [2025-03-14 01:06:49,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-14 01:06:49,831 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:06:49,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:06:49,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1391260711, now seen corresponding path program 1 times [2025-03-14 01:06:49,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:06:49,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664854115] [2025-03-14 01:06:49,832 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:06:49,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:06:49,840 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-14 01:06:49,845 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-14 01:06:49,845 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:06:49,845 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:06:49,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:06:49,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:06:49,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664854115] [2025-03-14 01:06:49,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664854115] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:06:49,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:06:49,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-14 01:06:49,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507486556] [2025-03-14 01:06:49,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:06:49,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-14 01:06:49,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:06:49,943 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-14 01:06:49,943 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-14 01:06:49,952 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-03-14 01:06:49,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 122 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:49,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:06:49,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-03-14 01:06:49,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:06:50,135 INFO L124 PetriNetUnfolderBase]: 1047/1641 cut-off events. [2025-03-14 01:06:50,135 INFO L125 PetriNetUnfolderBase]: For 677/755 co-relation queries the response was YES. [2025-03-14 01:06:50,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3890 conditions, 1641 events. 1047/1641 cut-off events. For 677/755 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 7555 event pairs, 686 based on Foata normal form. 0/1568 useless extension candidates. Maximal degree in co-relation 2766. Up to 1133 conditions per place. [2025-03-14 01:06:50,141 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 56 selfloop transitions, 5 changer transitions 0/64 dead transitions. [2025-03-14 01:06:50,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 64 transitions, 326 flow [2025-03-14 01:06:50,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-14 01:06:50,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-14 01:06:50,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2025-03-14 01:06:50,142 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2025-03-14 01:06:50,142 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 122 flow. Second operand 5 states and 87 transitions. [2025-03-14 01:06:50,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 64 transitions, 326 flow [2025-03-14 01:06:50,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 64 transitions, 322 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-14 01:06:50,144 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 143 flow [2025-03-14 01:06:50,144 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=143, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2025-03-14 01:06:50,145 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 8 predicate places. [2025-03-14 01:06:50,145 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 143 flow [2025-03-14 01:06:50,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:50,145 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:06:50,145 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, 1] [2025-03-14 01:06:50,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-14 01:06:50,145 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:06:50,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:06:50,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1437167876, now seen corresponding path program 1 times [2025-03-14 01:06:50,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:06:50,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972421176] [2025-03-14 01:06:50,146 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:06:50,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:06:50,153 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-14 01:06:50,159 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-14 01:06:50,160 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:06:50,160 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:06:50,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:06:50,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:06:50,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972421176] [2025-03-14 01:06:50,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972421176] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:06:50,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:06:50,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-14 01:06:50,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280039938] [2025-03-14 01:06:50,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:06:50,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-14 01:06:50,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:06:50,247 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-14 01:06:50,247 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-14 01:06:50,257 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-03-14 01:06:50,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 143 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:50,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:06:50,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-03-14 01:06:50,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:06:50,428 INFO L124 PetriNetUnfolderBase]: 882/1337 cut-off events. [2025-03-14 01:06:50,429 INFO L125 PetriNetUnfolderBase]: For 784/921 co-relation queries the response was YES. [2025-03-14 01:06:50,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3504 conditions, 1337 events. 882/1337 cut-off events. For 784/921 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5569 event pairs, 601 based on Foata normal form. 0/1270 useless extension candidates. Maximal degree in co-relation 2827. Up to 1095 conditions per place. [2025-03-14 01:06:50,438 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 28 selfloop transitions, 2 changer transitions 23/56 dead transitions. [2025-03-14 01:06:50,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 56 transitions, 309 flow [2025-03-14 01:06:50,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-14 01:06:50,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-14 01:06:50,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2025-03-14 01:06:50,441 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2025-03-14 01:06:50,441 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 143 flow. Second operand 5 states and 81 transitions. [2025-03-14 01:06:50,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 56 transitions, 309 flow [2025-03-14 01:06:50,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 56 transitions, 304 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-14 01:06:50,446 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 116 flow [2025-03-14 01:06:50,446 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=116, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2025-03-14 01:06:50,446 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 12 predicate places. [2025-03-14 01:06:50,446 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 116 flow [2025-03-14 01:06:50,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:50,446 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:06:50,447 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, 1, 1] [2025-03-14 01:06:50,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-14 01:06:50,447 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:06:50,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:06:50,447 INFO L85 PathProgramCache]: Analyzing trace with hash -315886043, now seen corresponding path program 1 times [2025-03-14 01:06:50,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:06:50,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658906347] [2025-03-14 01:06:50,447 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:06:50,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:06:50,456 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-14 01:06:50,466 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-14 01:06:50,466 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:06:50,466 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:06:50,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:06:50,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:06:50,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658906347] [2025-03-14 01:06:50,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658906347] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:06:50,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830671578] [2025-03-14 01:06:50,572 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:06:50,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:06:50,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:06:50,574 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) [2025-03-14 01:06:50,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-14 01:06:50,627 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-14 01:06:50,648 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-14 01:06:50,648 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:06:50,648 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:06:50,650 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-14 01:06:50,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:06:50,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:06:50,749 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:06:50,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:06:50,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830671578] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-14 01:06:50,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-14 01:06:50,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2025-03-14 01:06:50,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082202172] [2025-03-14 01:06:50,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:06:50,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-14 01:06:50,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:06:50,812 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-14 01:06:50,812 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-03-14 01:06:50,828 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2025-03-14 01:06:50,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 116 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:50,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:06:50,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2025-03-14 01:06:50,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:06:51,154 INFO L124 PetriNetUnfolderBase]: 1468/2122 cut-off events. [2025-03-14 01:06:51,155 INFO L125 PetriNetUnfolderBase]: For 843/993 co-relation queries the response was YES. [2025-03-14 01:06:51,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5707 conditions, 2122 events. 1468/2122 cut-off events. For 843/993 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 9238 event pairs, 293 based on Foata normal form. 0/1872 useless extension candidates. Maximal degree in co-relation 5688. Up to 668 conditions per place. [2025-03-14 01:06:51,164 INFO L140 encePairwiseOnDemand]: 24/33 looper letters, 87 selfloop transitions, 15 changer transitions 0/104 dead transitions. [2025-03-14 01:06:51,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 104 transitions, 559 flow [2025-03-14 01:06:51,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-14 01:06:51,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-14 01:06:51,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2025-03-14 01:06:51,166 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4612794612794613 [2025-03-14 01:06:51,166 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 116 flow. Second operand 9 states and 137 transitions. [2025-03-14 01:06:51,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 104 transitions, 559 flow [2025-03-14 01:06:51,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 104 transitions, 489 flow, removed 33 selfloop flow, removed 8 redundant places. [2025-03-14 01:06:51,172 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 178 flow [2025-03-14 01:06:51,172 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=178, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2025-03-14 01:06:51,174 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 10 predicate places. [2025-03-14 01:06:51,174 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 178 flow [2025-03-14 01:06:51,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:51,175 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:06:51,175 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, 1, 1] [2025-03-14 01:06:51,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-14 01:06:51,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:06:51,375 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:06:51,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:06:51,376 INFO L85 PathProgramCache]: Analyzing trace with hash -842556523, now seen corresponding path program 2 times [2025-03-14 01:06:51,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:06:51,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924504371] [2025-03-14 01:06:51,376 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:06:51,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:06:51,382 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-14 01:06:51,387 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 22 of 23 statements. [2025-03-14 01:06:51,387 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-14 01:06:51,387 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:06:51,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:06:51,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:06:51,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924504371] [2025-03-14 01:06:51,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924504371] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:06:51,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:06:51,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-14 01:06:51,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540167610] [2025-03-14 01:06:51,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:06:51,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-14 01:06:51,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:06:51,481 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-14 01:06:51,481 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-14 01:06:51,491 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2025-03-14 01:06:51,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 178 flow. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:51,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:06:51,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2025-03-14 01:06:51,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:06:52,041 INFO L124 PetriNetUnfolderBase]: 3201/4657 cut-off events. [2025-03-14 01:06:52,042 INFO L125 PetriNetUnfolderBase]: For 3504/3504 co-relation queries the response was YES. [2025-03-14 01:06:52,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13142 conditions, 4657 events. 3201/4657 cut-off events. For 3504/3504 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 24168 event pairs, 327 based on Foata normal form. 13/4411 useless extension candidates. Maximal degree in co-relation 13119. Up to 1405 conditions per place. [2025-03-14 01:06:52,063 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 196 selfloop transitions, 23 changer transitions 0/221 dead transitions. [2025-03-14 01:06:52,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 221 transitions, 1373 flow [2025-03-14 01:06:52,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-14 01:06:52,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-14 01:06:52,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2025-03-14 01:06:52,064 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5316804407713499 [2025-03-14 01:06:52,065 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 178 flow. Second operand 11 states and 193 transitions. [2025-03-14 01:06:52,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 221 transitions, 1373 flow [2025-03-14 01:06:52,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 221 transitions, 1370 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-14 01:06:52,074 INFO L231 Difference]: Finished difference. Result has 62 places, 66 transitions, 405 flow [2025-03-14 01:06:52,075 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=405, PETRI_PLACES=62, PETRI_TRANSITIONS=66} [2025-03-14 01:06:52,075 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 27 predicate places. [2025-03-14 01:06:52,075 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 66 transitions, 405 flow [2025-03-14 01:06:52,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:52,076 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:06:52,076 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, 1, 1] [2025-03-14 01:06:52,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-14 01:06:52,076 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:06:52,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:06:52,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1637086117, now seen corresponding path program 3 times [2025-03-14 01:06:52,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:06:52,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655889479] [2025-03-14 01:06:52,077 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:06:52,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:06:52,083 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 2 equivalence classes. [2025-03-14 01:06:52,091 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-14 01:06:52,091 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:06:52,091 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:06:52,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:06:52,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:06:52,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655889479] [2025-03-14 01:06:52,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655889479] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:06:52,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062190321] [2025-03-14 01:06:52,179 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:06:52,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:06:52,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:06:52,181 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) [2025-03-14 01:06:52,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-14 01:06:52,228 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 2 equivalence classes. [2025-03-14 01:06:52,246 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-14 01:06:52,247 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:06:52,247 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:06:52,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-14 01:06:52,249 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:06:52,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:06:52,324 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:06:52,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:06:52,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062190321] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-14 01:06:52,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-14 01:06:52,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2025-03-14 01:06:52,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17169323] [2025-03-14 01:06:52,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:06:52,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-14 01:06:52,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:06:52,379 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-14 01:06:52,379 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-03-14 01:06:52,388 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2025-03-14 01:06:52,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 66 transitions, 405 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:52,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:06:52,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2025-03-14 01:06:52,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:06:53,070 INFO L124 PetriNetUnfolderBase]: 4339/6263 cut-off events. [2025-03-14 01:06:53,070 INFO L125 PetriNetUnfolderBase]: For 12931/13294 co-relation queries the response was YES. [2025-03-14 01:06:53,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22272 conditions, 6263 events. 4339/6263 cut-off events. For 12931/13294 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 32858 event pairs, 759 based on Foata normal form. 184/6442 useless extension candidates. Maximal degree in co-relation 22241. Up to 1980 conditions per place. [2025-03-14 01:06:53,101 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 125 selfloop transitions, 40 changer transitions 0/168 dead transitions. [2025-03-14 01:06:53,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 168 transitions, 1272 flow [2025-03-14 01:06:53,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-14 01:06:53,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-14 01:06:53,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2025-03-14 01:06:53,102 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2025-03-14 01:06:53,103 INFO L175 Difference]: Start difference. First operand has 62 places, 66 transitions, 405 flow. Second operand 9 states and 144 transitions. [2025-03-14 01:06:53,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 168 transitions, 1272 flow [2025-03-14 01:06:53,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 168 transitions, 1260 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-14 01:06:53,144 INFO L231 Difference]: Finished difference. Result has 74 places, 82 transitions, 681 flow [2025-03-14 01:06:53,144 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=681, PETRI_PLACES=74, PETRI_TRANSITIONS=82} [2025-03-14 01:06:53,144 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 39 predicate places. [2025-03-14 01:06:53,144 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 82 transitions, 681 flow [2025-03-14 01:06:53,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:53,145 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:06:53,145 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, 1, 1] [2025-03-14 01:06:53,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-14 01:06:53,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-03-14 01:06:53,348 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:06:53,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:06:53,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1166765793, now seen corresponding path program 4 times [2025-03-14 01:06:53,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:06:53,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165331029] [2025-03-14 01:06:53,349 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 01:06:53,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:06:53,355 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-03-14 01:06:53,358 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 20 of 23 statements. [2025-03-14 01:06:53,358 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-14 01:06:53,358 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:06:53,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:06:53,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:06:53,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165331029] [2025-03-14 01:06:53,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165331029] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:06:53,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:06:53,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-14 01:06:53,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263701933] [2025-03-14 01:06:53,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:06:53,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-14 01:06:53,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:06:53,409 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-14 01:06:53,409 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2025-03-14 01:06:53,422 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2025-03-14 01:06:53,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 82 transitions, 681 flow. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:53,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:06:53,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2025-03-14 01:06:53,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:06:54,706 INFO L124 PetriNetUnfolderBase]: 8944/12548 cut-off events. [2025-03-14 01:06:54,707 INFO L125 PetriNetUnfolderBase]: For 50159/50159 co-relation queries the response was YES. [2025-03-14 01:06:54,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52961 conditions, 12548 events. 8944/12548 cut-off events. For 50159/50159 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 65772 event pairs, 958 based on Foata normal form. 24/12115 useless extension candidates. Maximal degree in co-relation 52923. Up to 3364 conditions per place. [2025-03-14 01:06:54,783 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 243 selfloop transitions, 162 changer transitions 0/406 dead transitions. [2025-03-14 01:06:54,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 406 transitions, 3914 flow [2025-03-14 01:06:54,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-14 01:06:54,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-14 01:06:54,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 269 transitions. [2025-03-14 01:06:54,784 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45286195286195285 [2025-03-14 01:06:54,784 INFO L175 Difference]: Start difference. First operand has 74 places, 82 transitions, 681 flow. Second operand 18 states and 269 transitions. [2025-03-14 01:06:54,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 406 transitions, 3914 flow [2025-03-14 01:06:54,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 406 transitions, 3749 flow, removed 20 selfloop flow, removed 4 redundant places. [2025-03-14 01:06:54,987 INFO L231 Difference]: Finished difference. Result has 103 places, 223 transitions, 2598 flow [2025-03-14 01:06:54,988 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2598, PETRI_PLACES=103, PETRI_TRANSITIONS=223} [2025-03-14 01:06:54,988 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 68 predicate places. [2025-03-14 01:06:54,988 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 223 transitions, 2598 flow [2025-03-14 01:06:54,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:54,988 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:06:54,988 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, 1, 1] [2025-03-14 01:06:54,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-14 01:06:54,989 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:06:54,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:06:54,989 INFO L85 PathProgramCache]: Analyzing trace with hash -2122204577, now seen corresponding path program 5 times [2025-03-14 01:06:54,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:06:54,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326230116] [2025-03-14 01:06:54,989 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 01:06:54,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:06:54,996 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-14 01:06:55,001 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-14 01:06:55,001 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:06:55,001 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:06:55,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:06:55,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:06:55,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326230116] [2025-03-14 01:06:55,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326230116] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:06:55,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779811104] [2025-03-14 01:06:55,075 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 01:06:55,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:06:55,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:06:55,077 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) [2025-03-14 01:06:55,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-14 01:06:55,124 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-14 01:06:55,141 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-14 01:06:55,142 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:06:55,142 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:06:55,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-14 01:06:55,144 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:06:55,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:06:55,214 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:06:55,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:06:55,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779811104] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:06:55,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:06:55,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2025-03-14 01:06:55,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429515059] [2025-03-14 01:06:55,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:06:55,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-14 01:06:55,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:06:55,290 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-14 01:06:55,290 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2025-03-14 01:06:55,298 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2025-03-14 01:06:55,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 223 transitions, 2598 flow. Second operand has 16 states, 16 states have (on average 7.0) internal successors, (112), 16 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:55,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:06:55,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2025-03-14 01:06:55,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:06:58,092 INFO L124 PetriNetUnfolderBase]: 15903/22433 cut-off events. [2025-03-14 01:06:58,092 INFO L125 PetriNetUnfolderBase]: For 163556/163556 co-relation queries the response was YES. [2025-03-14 01:06:58,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115271 conditions, 22433 events. 15903/22433 cut-off events. For 163556/163556 co-relation queries the response was YES. Maximal size of possible extension queue 854. Compared 129219 event pairs, 1556 based on Foata normal form. 62/22494 useless extension candidates. Maximal degree in co-relation 115218. Up to 5067 conditions per place. [2025-03-14 01:06:58,270 INFO L140 encePairwiseOnDemand]: 19/33 looper letters, 419 selfloop transitions, 413 changer transitions 1/834 dead transitions. [2025-03-14 01:06:58,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 834 transitions, 9852 flow [2025-03-14 01:06:58,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-03-14 01:06:58,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2025-03-14 01:06:58,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 435 transitions. [2025-03-14 01:06:58,273 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2025-03-14 01:06:58,273 INFO L175 Difference]: Start difference. First operand has 103 places, 223 transitions, 2598 flow. Second operand 30 states and 435 transitions. [2025-03-14 01:06:58,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 834 transitions, 9852 flow [2025-03-14 01:06:59,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 834 transitions, 9576 flow, removed 138 selfloop flow, removed 0 redundant places. [2025-03-14 01:06:59,949 INFO L231 Difference]: Finished difference. Result has 141 places, 509 transitions, 7194 flow [2025-03-14 01:06:59,949 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=2490, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=7194, PETRI_PLACES=141, PETRI_TRANSITIONS=509} [2025-03-14 01:06:59,949 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 106 predicate places. [2025-03-14 01:06:59,949 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 509 transitions, 7194 flow [2025-03-14 01:06:59,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.0) internal successors, (112), 16 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:06:59,950 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:06:59,950 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, 1, 1] [2025-03-14 01:06:59,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-14 01:07:00,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:07:00,150 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:07:00,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:00,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1623356617, now seen corresponding path program 6 times [2025-03-14 01:07:00,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:00,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939149949] [2025-03-14 01:07:00,151 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-14 01:07:00,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:00,158 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 23 statements into 2 equivalence classes. [2025-03-14 01:07:00,163 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 22 of 23 statements. [2025-03-14 01:07:00,163 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-14 01:07:00,163 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:00,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:07:00,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:00,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939149949] [2025-03-14 01:07:00,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939149949] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:07:00,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:07:00,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-14 01:07:00,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330069836] [2025-03-14 01:07:00,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:07:00,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-14 01:07:00,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:00,239 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-14 01:07:00,239 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-14 01:07:00,246 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2025-03-14 01:07:00,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 509 transitions, 7194 flow. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:00,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:00,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2025-03-14 01:07:00,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:03,449 INFO L124 PetriNetUnfolderBase]: 19750/27758 cut-off events. [2025-03-14 01:07:03,450 INFO L125 PetriNetUnfolderBase]: For 264777/264777 co-relation queries the response was YES. [2025-03-14 01:07:03,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157140 conditions, 27758 events. 19750/27758 cut-off events. For 264777/264777 co-relation queries the response was YES. Maximal size of possible extension queue 1105. Compared 165309 event pairs, 5136 based on Foata normal form. 16/27774 useless extension candidates. Maximal degree in co-relation 157074. Up to 17364 conditions per place. [2025-03-14 01:07:03,747 INFO L140 encePairwiseOnDemand]: 21/33 looper letters, 891 selfloop transitions, 254 changer transitions 0/1146 dead transitions. [2025-03-14 01:07:03,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 1146 transitions, 17944 flow [2025-03-14 01:07:03,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-14 01:07:03,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-14 01:07:03,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 210 transitions. [2025-03-14 01:07:03,750 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5303030303030303 [2025-03-14 01:07:03,750 INFO L175 Difference]: Start difference. First operand has 141 places, 509 transitions, 7194 flow. Second operand 12 states and 210 transitions. [2025-03-14 01:07:03,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 1146 transitions, 17944 flow [2025-03-14 01:07:07,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 1146 transitions, 16721 flow, removed 550 selfloop flow, removed 3 redundant places. [2025-03-14 01:07:07,700 INFO L231 Difference]: Finished difference. Result has 158 places, 708 transitions, 10697 flow [2025-03-14 01:07:07,700 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=6733, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10697, PETRI_PLACES=158, PETRI_TRANSITIONS=708} [2025-03-14 01:07:07,701 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 123 predicate places. [2025-03-14 01:07:07,701 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 708 transitions, 10697 flow [2025-03-14 01:07:07,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:07,701 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:07,701 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, 1, 1] [2025-03-14 01:07:07,701 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-14 01:07:07,701 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:07:07,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:07,702 INFO L85 PathProgramCache]: Analyzing trace with hash -582138042, now seen corresponding path program 1 times [2025-03-14 01:07:07,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:07,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218968270] [2025-03-14 01:07:07,703 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:07:07,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:07,708 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-14 01:07:07,712 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-14 01:07:07,713 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:07:07,713 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:07:07,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:07,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218968270] [2025-03-14 01:07:07,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218968270] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:07:07,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643385110] [2025-03-14 01:07:07,763 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 01:07:07,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:07:07,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:07:07,765 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) [2025-03-14 01:07:07,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-14 01:07:07,805 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-14 01:07:07,819 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-14 01:07:07,820 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:07:07,820 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:07,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-14 01:07:07,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:07:07,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:07:07,842 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:07:07,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 01:07:07,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643385110] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-14 01:07:07,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-14 01:07:07,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2025-03-14 01:07:07,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068667967] [2025-03-14 01:07:07,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:07:07,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-14 01:07:07,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:07,867 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-14 01:07:07,867 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-03-14 01:07:07,872 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 33 [2025-03-14 01:07:07,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 708 transitions, 10697 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:07,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:07,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 33 [2025-03-14 01:07:07,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:10,789 INFO L124 PetriNetUnfolderBase]: 15765/22593 cut-off events. [2025-03-14 01:07:10,789 INFO L125 PetriNetUnfolderBase]: For 273879/276394 co-relation queries the response was YES. [2025-03-14 01:07:10,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133555 conditions, 22593 events. 15765/22593 cut-off events. For 273879/276394 co-relation queries the response was YES. Maximal size of possible extension queue 1194. Compared 142636 event pairs, 3076 based on Foata normal form. 1152/23184 useless extension candidates. Maximal degree in co-relation 133482. Up to 11223 conditions per place. [2025-03-14 01:07:11,009 INFO L140 encePairwiseOnDemand]: 27/33 looper letters, 693 selfloop transitions, 43 changer transitions 0/874 dead transitions. [2025-03-14 01:07:11,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 874 transitions, 14979 flow [2025-03-14 01:07:11,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-14 01:07:11,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-14 01:07:11,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 72 transitions. [2025-03-14 01:07:11,011 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2025-03-14 01:07:11,011 INFO L175 Difference]: Start difference. First operand has 158 places, 708 transitions, 10697 flow. Second operand 5 states and 72 transitions. [2025-03-14 01:07:11,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 874 transitions, 14979 flow [2025-03-14 01:07:13,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 874 transitions, 14773 flow, removed 90 selfloop flow, removed 1 redundant places. [2025-03-14 01:07:13,608 INFO L231 Difference]: Finished difference. Result has 161 places, 683 transitions, 10306 flow [2025-03-14 01:07:13,609 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=10220, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=640, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=10306, PETRI_PLACES=161, PETRI_TRANSITIONS=683} [2025-03-14 01:07:13,609 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 126 predicate places. [2025-03-14 01:07:13,609 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 683 transitions, 10306 flow [2025-03-14 01:07:13,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:13,609 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:13,609 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, 1, 1] [2025-03-14 01:07:13,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-14 01:07:13,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:07:13,810 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:07:13,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:13,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1545178559, now seen corresponding path program 7 times [2025-03-14 01:07:13,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:13,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207315112] [2025-03-14 01:07:13,811 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-14 01:07:13,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:13,816 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-14 01:07:13,824 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-14 01:07:13,824 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:07:13,824 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:13,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:07:13,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:13,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207315112] [2025-03-14 01:07:13,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207315112] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:07:13,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444476250] [2025-03-14 01:07:13,895 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-14 01:07:13,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:07:13,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:07:13,898 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) [2025-03-14 01:07:13,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-14 01:07:13,944 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-14 01:07:13,960 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-14 01:07:13,960 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 01:07:13,960 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:13,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-14 01:07:13,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:07:14,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:07:14,033 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:07:14,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:07:14,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444476250] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-14 01:07:14,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-14 01:07:14,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2025-03-14 01:07:14,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843899024] [2025-03-14 01:07:14,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:07:14,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-14 01:07:14,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:14,144 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-14 01:07:14,144 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2025-03-14 01:07:14,152 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2025-03-14 01:07:14,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 683 transitions, 10306 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:14,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:14,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2025-03-14 01:07:14,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:17,986 INFO L124 PetriNetUnfolderBase]: 18488/26249 cut-off events. [2025-03-14 01:07:17,986 INFO L125 PetriNetUnfolderBase]: For 275798/276927 co-relation queries the response was YES. [2025-03-14 01:07:18,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153807 conditions, 26249 events. 18488/26249 cut-off events. For 275798/276927 co-relation queries the response was YES. Maximal size of possible extension queue 1227. Compared 161818 event pairs, 2604 based on Foata normal form. 421/26513 useless extension candidates. Maximal degree in co-relation 153731. Up to 9185 conditions per place. [2025-03-14 01:07:18,249 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 636 selfloop transitions, 386 changer transitions 0/1031 dead transitions. [2025-03-14 01:07:18,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 1031 transitions, 16933 flow [2025-03-14 01:07:18,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-14 01:07:18,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-14 01:07:18,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2025-03-14 01:07:18,250 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2025-03-14 01:07:18,250 INFO L175 Difference]: Start difference. First operand has 161 places, 683 transitions, 10306 flow. Second operand 9 states and 143 transitions. [2025-03-14 01:07:18,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 1031 transitions, 16933 flow [2025-03-14 01:07:21,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 1031 transitions, 16831 flow, removed 6 selfloop flow, removed 3 redundant places. [2025-03-14 01:07:21,655 INFO L231 Difference]: Finished difference. Result has 170 places, 809 transitions, 13831 flow [2025-03-14 01:07:21,655 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=10250, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13831, PETRI_PLACES=170, PETRI_TRANSITIONS=809} [2025-03-14 01:07:21,655 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 135 predicate places. [2025-03-14 01:07:21,656 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 809 transitions, 13831 flow [2025-03-14 01:07:21,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:21,656 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:21,656 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, 1, 1] [2025-03-14 01:07:21,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-14 01:07:21,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-14 01:07:21,856 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:07:21,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:21,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1096939565, now seen corresponding path program 8 times [2025-03-14 01:07:21,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:21,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018829996] [2025-03-14 01:07:21,857 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-14 01:07:21,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:21,862 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-14 01:07:21,871 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 22 of 23 statements. [2025-03-14 01:07:21,872 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-14 01:07:21,872 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:21,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:07:21,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:21,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018829996] [2025-03-14 01:07:21,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018829996] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 01:07:21,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 01:07:21,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-14 01:07:21,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094027121] [2025-03-14 01:07:21,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:07:21,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-14 01:07:21,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:21,942 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-14 01:07:21,942 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-14 01:07:21,951 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2025-03-14 01:07:21,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 809 transitions, 13831 flow. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:21,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:21,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2025-03-14 01:07:21,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:27,333 INFO L124 PetriNetUnfolderBase]: 21421/30001 cut-off events. [2025-03-14 01:07:27,334 INFO L125 PetriNetUnfolderBase]: For 406304/406304 co-relation queries the response was YES. [2025-03-14 01:07:27,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188380 conditions, 30001 events. 21421/30001 cut-off events. For 406304/406304 co-relation queries the response was YES. Maximal size of possible extension queue 1195. Compared 180247 event pairs, 2263 based on Foata normal form. 28/30029 useless extension candidates. Maximal degree in co-relation 188299. Up to 13092 conditions per place. [2025-03-14 01:07:27,602 INFO L140 encePairwiseOnDemand]: 22/33 looper letters, 1138 selfloop transitions, 337 changer transitions 0/1476 dead transitions. [2025-03-14 01:07:27,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 1476 transitions, 26995 flow [2025-03-14 01:07:27,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-14 01:07:27,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-14 01:07:27,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 219 transitions. [2025-03-14 01:07:27,603 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5104895104895105 [2025-03-14 01:07:27,603 INFO L175 Difference]: Start difference. First operand has 170 places, 809 transitions, 13831 flow. Second operand 13 states and 219 transitions. [2025-03-14 01:07:27,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 1476 transitions, 26995 flow [2025-03-14 01:07:32,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 1476 transitions, 26642 flow, removed 175 selfloop flow, removed 2 redundant places. [2025-03-14 01:07:32,061 INFO L231 Difference]: Finished difference. Result has 188 places, 902 transitions, 16761 flow [2025-03-14 01:07:32,061 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=13696, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=809, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=16761, PETRI_PLACES=188, PETRI_TRANSITIONS=902} [2025-03-14 01:07:32,062 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 153 predicate places. [2025-03-14 01:07:32,062 INFO L471 AbstractCegarLoop]: Abstraction has has 188 places, 902 transitions, 16761 flow [2025-03-14 01:07:32,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:32,062 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:32,062 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, 1, 1] [2025-03-14 01:07:32,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-03-14 01:07:32,062 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:07:32,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:32,063 INFO L85 PathProgramCache]: Analyzing trace with hash 601447453, now seen corresponding path program 9 times [2025-03-14 01:07:32,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:32,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296027581] [2025-03-14 01:07:32,063 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:07:32,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:32,067 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 2 equivalence classes. [2025-03-14 01:07:32,076 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-14 01:07:32,076 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:07:32,076 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:32,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:07:32,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:32,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296027581] [2025-03-14 01:07:32,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296027581] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:07:32,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621201941] [2025-03-14 01:07:32,138 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-14 01:07:32,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:07:32,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:07:32,140 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) [2025-03-14 01:07:32,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-14 01:07:32,184 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 2 equivalence classes. [2025-03-14 01:07:32,202 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-14 01:07:32,202 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-14 01:07:32,202 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:32,203 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-14 01:07:32,204 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:07:32,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:07:32,253 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:07:32,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:07:32,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621201941] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-14 01:07:32,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-14 01:07:32,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2025-03-14 01:07:32,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168639475] [2025-03-14 01:07:32,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:07:32,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-14 01:07:32,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:32,305 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-14 01:07:32,305 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2025-03-14 01:07:32,313 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 33 [2025-03-14 01:07:32,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 902 transitions, 16761 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:32,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:32,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 33 [2025-03-14 01:07:32,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:36,885 INFO L124 PetriNetUnfolderBase]: 19115/27267 cut-off events. [2025-03-14 01:07:36,885 INFO L125 PetriNetUnfolderBase]: For 403508/404571 co-relation queries the response was YES. [2025-03-14 01:07:37,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176401 conditions, 27267 events. 19115/27267 cut-off events. For 403508/404571 co-relation queries the response was YES. Maximal size of possible extension queue 1247. Compared 170276 event pairs, 1929 based on Foata normal form. 402/27512 useless extension candidates. Maximal degree in co-relation 176313. Up to 11878 conditions per place. [2025-03-14 01:07:37,151 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 426 selfloop transitions, 604 changer transitions 0/1039 dead transitions. [2025-03-14 01:07:37,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 1039 transitions, 20569 flow [2025-03-14 01:07:37,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-14 01:07:37,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-14 01:07:37,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2025-03-14 01:07:37,155 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2025-03-14 01:07:37,155 INFO L175 Difference]: Start difference. First operand has 188 places, 902 transitions, 16761 flow. Second operand 8 states and 123 transitions. [2025-03-14 01:07:37,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 1039 transitions, 20569 flow [2025-03-14 01:07:41,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 1039 transitions, 20405 flow, removed 48 selfloop flow, removed 2 redundant places. [2025-03-14 01:07:41,999 INFO L231 Difference]: Finished difference. Result has 196 places, 947 transitions, 19556 flow [2025-03-14 01:07:42,000 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=16617, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=902, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=559, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=19556, PETRI_PLACES=196, PETRI_TRANSITIONS=947} [2025-03-14 01:07:42,000 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 161 predicate places. [2025-03-14 01:07:42,000 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 947 transitions, 19556 flow [2025-03-14 01:07:42,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:42,001 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:42,001 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, 1, 1] [2025-03-14 01:07:42,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-14 01:07:42,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:07:42,201 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:07:42,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:42,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1623394721, now seen corresponding path program 10 times [2025-03-14 01:07:42,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:42,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513909152] [2025-03-14 01:07:42,202 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 01:07:42,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:42,208 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-03-14 01:07:42,210 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 20 of 23 statements. [2025-03-14 01:07:42,210 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-14 01:07:42,210 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:42,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:07:42,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:42,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513909152] [2025-03-14 01:07:42,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513909152] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:07:42,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582955160] [2025-03-14 01:07:42,251 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-14 01:07:42,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:07:42,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:07:42,253 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-14 01:07:42,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-14 01:07:42,299 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-03-14 01:07:42,310 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 20 of 23 statements. [2025-03-14 01:07:42,310 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-14 01:07:42,311 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:42,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-14 01:07:42,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:07:42,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:07:42,356 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:07:42,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:07:42,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582955160] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-14 01:07:42,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-14 01:07:42,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 12 [2025-03-14 01:07:42,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527138044] [2025-03-14 01:07:42,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 01:07:42,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-14 01:07:42,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:42,405 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-14 01:07:42,405 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2025-03-14 01:07:42,416 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2025-03-14 01:07:42,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 947 transitions, 19556 flow. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:42,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:42,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2025-03-14 01:07:42,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:07:48,728 INFO L124 PetriNetUnfolderBase]: 22584/31940 cut-off events. [2025-03-14 01:07:48,728 INFO L125 PetriNetUnfolderBase]: For 559386/559386 co-relation queries the response was YES. [2025-03-14 01:07:48,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220941 conditions, 31940 events. 22584/31940 cut-off events. For 559386/559386 co-relation queries the response was YES. Maximal size of possible extension queue 1325. Compared 195767 event pairs, 3144 based on Foata normal form. 22/31962 useless extension candidates. Maximal degree in co-relation 220848. Up to 7529 conditions per place. [2025-03-14 01:07:49,070 INFO L140 encePairwiseOnDemand]: 23/33 looper letters, 627 selfloop transitions, 622 changer transitions 0/1250 dead transitions. [2025-03-14 01:07:49,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 1250 transitions, 26826 flow [2025-03-14 01:07:49,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-14 01:07:49,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-14 01:07:49,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 186 transitions. [2025-03-14 01:07:49,072 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43356643356643354 [2025-03-14 01:07:49,072 INFO L175 Difference]: Start difference. First operand has 196 places, 947 transitions, 19556 flow. Second operand 13 states and 186 transitions. [2025-03-14 01:07:49,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 1250 transitions, 26826 flow [2025-03-14 01:07:55,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 1250 transitions, 26483 flow, removed 58 selfloop flow, removed 3 redundant places. [2025-03-14 01:07:55,036 INFO L231 Difference]: Finished difference. Result has 211 places, 1105 transitions, 23792 flow [2025-03-14 01:07:55,036 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=33, PETRI_DIFFERENCE_MINUEND_FLOW=19290, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=947, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=469, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=23792, PETRI_PLACES=211, PETRI_TRANSITIONS=1105} [2025-03-14 01:07:55,037 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 176 predicate places. [2025-03-14 01:07:55,037 INFO L471 AbstractCegarLoop]: Abstraction has has 211 places, 1105 transitions, 23792 flow [2025-03-14 01:07:55,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-14 01:07:55,037 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 01:07:55,037 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, 1, 1] [2025-03-14 01:07:55,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-14 01:07:55,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:07:55,237 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-03-14 01:07:55,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 01:07:55,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1432136681, now seen corresponding path program 11 times [2025-03-14 01:07:55,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 01:07:55,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391015689] [2025-03-14 01:07:55,238 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 01:07:55,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 01:07:55,243 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-14 01:07:55,246 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-14 01:07:55,246 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:07:55,246 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:55,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:07:55,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 01:07:55,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391015689] [2025-03-14 01:07:55,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391015689] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-14 01:07:55,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393034142] [2025-03-14 01:07:55,298 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-14 01:07:55,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-14 01:07:55,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 01:07:55,300 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) [2025-03-14 01:07:55,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-14 01:07:55,347 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-14 01:07:55,362 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-14 01:07:55,362 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-14 01:07:55,362 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 01:07:55,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-14 01:07:55,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-14 01:07:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:07:55,418 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-14 01:07:55,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-14 01:07:55,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393034142] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-14 01:07:55,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-14 01:07:55,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2025-03-14 01:07:55,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113274922] [2025-03-14 01:07:55,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-14 01:07:55,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-14 01:07:55,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 01:07:55,467 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-14 01:07:55,467 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2025-03-14 01:07:55,472 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 33 [2025-03-14 01:07:55,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 1105 transitions, 23792 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) [2025-03-14 01:07:55,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 01:07:55,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 33 [2025-03-14 01:07:55,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-14 01:08:02,345 INFO L124 PetriNetUnfolderBase]: 22700/32137 cut-off events. [2025-03-14 01:08:02,345 INFO L125 PetriNetUnfolderBase]: For 641523/641523 co-relation queries the response was YES. [2025-03-14 01:08:02,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231944 conditions, 32137 events. 22700/32137 cut-off events. For 641523/641523 co-relation queries the response was YES. Maximal size of possible extension queue 1344. Compared 197145 event pairs, 2039 based on Foata normal form. 69/32206 useless extension candidates. Maximal degree in co-relation 231847. Up to 7622 conditions per place. [2025-03-14 01:08:02,750 INFO L140 encePairwiseOnDemand]: 20/33 looper letters, 413 selfloop transitions, 903 changer transitions 0/1317 dead transitions. [2025-03-14 01:08:02,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 1317 transitions, 29075 flow [2025-03-14 01:08:02,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-14 01:08:02,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-03-14 01:08:02,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 269 transitions. [2025-03-14 01:08:02,752 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37052341597796146 [2025-03-14 01:08:02,752 INFO L175 Difference]: Start difference. First operand has 211 places, 1105 transitions, 23792 flow. Second operand 22 states and 269 transitions. [2025-03-14 01:08:02,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 1317 transitions, 29075 flow