./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 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-buffer-mult2.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 dbff9cba9b3794b18d55ca52c1abf6279404a7b220f91d79730a04b586f9ee44 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 06:42:31,866 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 06:42:31,920 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-17 06:42:31,924 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 06:42:31,926 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 06:42:31,947 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 06:42:31,947 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 06:42:31,947 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 06:42:31,948 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 06:42:31,948 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 06:42:31,948 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 06:42:31,948 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 06:42:31,948 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 06:42:31,948 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 06:42:31,948 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 06:42:31,948 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 06:42:31,948 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 06:42:31,948 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 06:42:31,948 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 06:42:31,948 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 06:42:31,948 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 06:42:31,949 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 06:42:31,949 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 06:42:31,949 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 06:42:31,949 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 06:42:31,949 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 06:42:31,949 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 06:42:31,949 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 06:42:31,949 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 06:42:31,949 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 06:42:31,949 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 06:42:31,949 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 06:42:31,949 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:42:31,949 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 06:42:31,949 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 06:42:31,949 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 06:42:31,951 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 06:42:31,951 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 06:42:31,951 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 06:42:31,952 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 06:42:31,952 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 06:42:31,952 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 06:42:31,952 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 06:42:31,952 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 -> dbff9cba9b3794b18d55ca52c1abf6279404a7b220f91d79730a04b586f9ee44 [2025-03-17 06:42:32,180 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 06:42:32,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 06:42:32,187 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 06:42:32,189 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 06:42:32,189 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 06:42:32,190 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c [2025-03-17 06:42:33,340 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd2c6d0e1/a99e7311714b4f7890f513b1d7f6c1a7/FLAG235d2956b [2025-03-17 06:42:33,629 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 06:42:33,631 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c [2025-03-17 06:42:33,639 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd2c6d0e1/a99e7311714b4f7890f513b1d7f6c1a7/FLAG235d2956b [2025-03-17 06:42:33,933 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd2c6d0e1/a99e7311714b4f7890f513b1d7f6c1a7 [2025-03-17 06:42:33,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 06:42:33,936 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 06:42:33,937 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 06:42:33,937 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 06:42:33,939 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 06:42:33,940 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:42:33" (1/1) ... [2025-03-17 06:42:33,940 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47167c96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:33, skipping insertion in model container [2025-03-17 06:42:33,940 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:42:33" (1/1) ... [2025-03-17 06:42:33,951 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 06:42:34,092 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-buffer-mult2.wvr.c[4151,4164] [2025-03-17 06:42:34,103 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:42:34,110 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 06:42:34,129 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-buffer-mult2.wvr.c[4151,4164] [2025-03-17 06:42:34,131 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:42:34,140 INFO L204 MainTranslator]: Completed translation [2025-03-17 06:42:34,141 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:34 WrapperNode [2025-03-17 06:42:34,141 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 06:42:34,142 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 06:42:34,142 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 06:42:34,142 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 06:42:34,146 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:34" (1/1) ... [2025-03-17 06:42:34,152 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:34" (1/1) ... [2025-03-17 06:42:34,168 INFO L138 Inliner]: procedures = 26, calls = 56, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 274 [2025-03-17 06:42:34,169 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 06:42:34,170 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 06:42:34,170 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 06:42:34,170 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 06:42:34,175 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:34" (1/1) ... [2025-03-17 06:42:34,175 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:34" (1/1) ... [2025-03-17 06:42:34,177 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:34" (1/1) ... [2025-03-17 06:42:34,187 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-03-17 06:42:34,187 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:34" (1/1) ... [2025-03-17 06:42:34,187 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:34" (1/1) ... [2025-03-17 06:42:34,192 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:34" (1/1) ... [2025-03-17 06:42:34,193 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:34" (1/1) ... [2025-03-17 06:42:34,194 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:34" (1/1) ... [2025-03-17 06:42:34,199 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:34" (1/1) ... [2025-03-17 06:42:34,201 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 06:42:34,202 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 06:42:34,202 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 06:42:34,202 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 06:42:34,203 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:34" (1/1) ... [2025-03-17 06:42:34,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:42:34,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:42:34,225 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) [2025-03-17 06:42:34,226 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 [2025-03-17 06:42:34,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 06:42:34,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 06:42:34,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 06:42:34,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 06:42:34,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 06:42:34,242 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 06:42:34,242 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 06:42:34,242 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 06:42:34,242 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 06:42:34,242 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-17 06:42:34,243 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-17 06:42:34,243 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-03-17 06:42:34,243 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-03-17 06:42:34,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 06:42:34,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 06:42:34,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-17 06:42:34,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-17 06:42:34,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 06:42:34,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 06:42:34,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 06:42:34,244 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 06:42:34,326 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 06:42:34,327 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 06:42:34,656 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 06:42:34,656 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 06:42:34,897 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 06:42:34,897 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 06:42:34,897 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:42:34 BoogieIcfgContainer [2025-03-17 06:42:34,897 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 06:42:34,899 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 06:42:34,899 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 06:42:34,903 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 06:42:34,903 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 06:42:33" (1/3) ... [2025-03-17 06:42:34,904 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@737b7061 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:42:34, skipping insertion in model container [2025-03-17 06:42:34,904 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:34" (2/3) ... [2025-03-17 06:42:34,904 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@737b7061 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:42:34, skipping insertion in model container [2025-03-17 06:42:34,904 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:42:34" (3/3) ... [2025-03-17 06:42:34,905 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult2.wvr.c [2025-03-17 06:42:34,916 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 06:42:34,918 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-buffer-mult2.wvr.c that has 5 procedures, 43 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2025-03-17 06:42:34,918 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 06:42:34,967 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-17 06:42:34,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 48 transitions, 124 flow [2025-03-17 06:42:35,013 INFO L124 PetriNetUnfolderBase]: 6/44 cut-off events. [2025-03-17 06:42:35,015 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-17 06:42:35,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 44 events. 6/44 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 70 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2025-03-17 06:42:35,019 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 48 transitions, 124 flow [2025-03-17 06:42:35,021 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 43 transitions, 110 flow [2025-03-17 06:42:35,030 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 06:42:35,039 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;@69276da5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 06:42:35,039 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-03-17 06:42:35,054 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 06:42:35,054 INFO L124 PetriNetUnfolderBase]: 6/42 cut-off events. [2025-03-17 06:42:35,055 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-17 06:42:35,055 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:35,055 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, 1, 1, 1, 1, 1, 1] [2025-03-17 06:42:35,056 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 2 more)] === [2025-03-17 06:42:35,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:35,059 INFO L85 PathProgramCache]: Analyzing trace with hash 852056897, now seen corresponding path program 1 times [2025-03-17 06:42:35,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:35,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854379226] [2025-03-17 06:42:35,066 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:42:35,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:35,128 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-17 06:42:35,181 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 06:42:35,185 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:42:35,185 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:35,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:42:35,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:35,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854379226] [2025-03-17 06:42:35,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854379226] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:42:35,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:42:35,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 06:42:35,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055825286] [2025-03-17 06:42:35,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:42:35,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:42:35,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:35,403 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:42:35,404 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:42:35,405 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-17 06:42:35,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:42:35,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:35,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-17 06:42:35,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:35,984 INFO L124 PetriNetUnfolderBase]: 3682/5092 cut-off events. [2025-03-17 06:42:35,986 INFO L125 PetriNetUnfolderBase]: For 393/393 co-relation queries the response was YES. [2025-03-17 06:42:35,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10276 conditions, 5092 events. 3682/5092 cut-off events. For 393/393 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 24522 event pairs, 1024 based on Foata normal form. 1/5005 useless extension candidates. Maximal degree in co-relation 9160. Up to 3095 conditions per place. [2025-03-17 06:42:36,023 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 51 selfloop transitions, 3 changer transitions 1/64 dead transitions. [2025-03-17 06:42:36,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 64 transitions, 277 flow [2025-03-17 06:42:36,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:42:36,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:42:36,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2025-03-17 06:42:36,033 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6597222222222222 [2025-03-17 06:42:36,034 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 110 flow. Second operand 3 states and 95 transitions. [2025-03-17 06:42:36,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 64 transitions, 277 flow [2025-03-17 06:42:36,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 64 transitions, 251 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-17 06:42:36,046 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 113 flow [2025-03-17 06:42:36,049 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2025-03-17 06:42:36,052 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -5 predicate places. [2025-03-17 06:42:36,052 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 113 flow [2025-03-17 06:42:36,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:42:36,053 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:36,053 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:42:36,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 06:42:36,054 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 2 more)] === [2025-03-17 06:42:36,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:36,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1008779090, now seen corresponding path program 1 times [2025-03-17 06:42:36,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:36,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025542328] [2025-03-17 06:42:36,056 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:42:36,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:36,072 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-17 06:42:36,098 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-17 06:42:36,098 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:42:36,098 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:42:36,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:36,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025542328] [2025-03-17 06:42:36,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025542328] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:42:36,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:42:36,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 06:42:36,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547941963] [2025-03-17 06:42:36,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:42:36,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:42:36,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:36,257 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:42:36,257 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:42:36,258 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-17 06:42:36,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2025-03-17 06:42:36,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:36,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-17 06:42:36,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:36,754 INFO L124 PetriNetUnfolderBase]: 4690/6606 cut-off events. [2025-03-17 06:42:36,754 INFO L125 PetriNetUnfolderBase]: For 889/889 co-relation queries the response was YES. [2025-03-17 06:42:36,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13877 conditions, 6606 events. 4690/6606 cut-off events. For 889/889 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 34475 event pairs, 1685 based on Foata normal form. 186/6737 useless extension candidates. Maximal degree in co-relation 5583. Up to 3904 conditions per place. [2025-03-17 06:42:36,835 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 59 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2025-03-17 06:42:36,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 70 transitions, 299 flow [2025-03-17 06:42:36,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:42:36,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:42:36,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2025-03-17 06:42:36,836 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6805555555555556 [2025-03-17 06:42:36,837 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 113 flow. Second operand 3 states and 98 transitions. [2025-03-17 06:42:36,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 70 transitions, 299 flow [2025-03-17 06:42:36,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 70 transitions, 295 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 06:42:36,838 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 124 flow [2025-03-17 06:42:36,838 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2025-03-17 06:42:36,838 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -3 predicate places. [2025-03-17 06:42:36,839 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 124 flow [2025-03-17 06:42:36,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2025-03-17 06:42:36,839 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:36,839 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:42:36,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 06:42:36,839 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 2 more)] === [2025-03-17 06:42:36,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:36,840 INFO L85 PathProgramCache]: Analyzing trace with hash 752027850, now seen corresponding path program 1 times [2025-03-17 06:42:36,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:36,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786635478] [2025-03-17 06:42:36,840 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:42:36,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:36,848 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-17 06:42:36,855 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-17 06:42:36,855 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:42:36,855 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:36,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:42:36,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:36,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786635478] [2025-03-17 06:42:36,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786635478] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:42:36,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:42:36,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 06:42:36,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109840723] [2025-03-17 06:42:36,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:42:36,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:42:36,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:36,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:42:36,957 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:42:36,957 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-17 06:42:36,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2025-03-17 06:42:36,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:36,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-17 06:42:36,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:37,527 INFO L124 PetriNetUnfolderBase]: 5824/8348 cut-off events. [2025-03-17 06:42:37,528 INFO L125 PetriNetUnfolderBase]: For 2271/2271 co-relation queries the response was YES. [2025-03-17 06:42:37,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18116 conditions, 8348 events. 5824/8348 cut-off events. For 2271/2271 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 45580 event pairs, 2031 based on Foata normal form. 138/8461 useless extension candidates. Maximal degree in co-relation 11527. Up to 4926 conditions per place. [2025-03-17 06:42:37,572 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 59 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2025-03-17 06:42:37,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 70 transitions, 315 flow [2025-03-17 06:42:37,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:42:37,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:42:37,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2025-03-17 06:42:37,574 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2025-03-17 06:42:37,574 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 124 flow. Second operand 3 states and 96 transitions. [2025-03-17 06:42:37,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 70 transitions, 315 flow [2025-03-17 06:42:37,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 70 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 06:42:37,578 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 136 flow [2025-03-17 06:42:37,578 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2025-03-17 06:42:37,579 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -1 predicate places. [2025-03-17 06:42:37,579 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 136 flow [2025-03-17 06:42:37,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2025-03-17 06:42:37,580 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:37,580 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:42:37,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 06:42:37,580 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 2 more)] === [2025-03-17 06:42:37,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:37,581 INFO L85 PathProgramCache]: Analyzing trace with hash 190990067, now seen corresponding path program 1 times [2025-03-17 06:42:37,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:37,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735554476] [2025-03-17 06:42:37,582 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:42:37,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:37,592 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-17 06:42:37,607 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-17 06:42:37,608 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:42:37,608 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:42:37,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:37,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735554476] [2025-03-17 06:42:37,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735554476] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:42:37,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:42:37,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 06:42:37,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588211842] [2025-03-17 06:42:37,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:42:37,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 06:42:37,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:37,756 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 06:42:37,757 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 06:42:37,757 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-17 06:42:37,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2025-03-17 06:42:37,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:37,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-17 06:42:37,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:38,725 INFO L124 PetriNetUnfolderBase]: 7723/11129 cut-off events. [2025-03-17 06:42:38,725 INFO L125 PetriNetUnfolderBase]: For 4137/4137 co-relation queries the response was YES. [2025-03-17 06:42:38,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25176 conditions, 11129 events. 7723/11129 cut-off events. For 4137/4137 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 64317 event pairs, 6327 based on Foata normal form. 211/11250 useless extension candidates. Maximal degree in co-relation 13290. Up to 7786 conditions per place. [2025-03-17 06:42:38,766 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 66 selfloop transitions, 5 changer transitions 0/80 dead transitions. [2025-03-17 06:42:38,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 80 transitions, 367 flow [2025-03-17 06:42:38,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:42:38,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:42:38,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2025-03-17 06:42:38,767 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5458333333333333 [2025-03-17 06:42:38,767 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 136 flow. Second operand 5 states and 131 transitions. [2025-03-17 06:42:38,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 80 transitions, 367 flow [2025-03-17 06:42:38,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 80 transitions, 364 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 06:42:38,769 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 170 flow [2025-03-17 06:42:38,769 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2025-03-17 06:42:38,770 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2025-03-17 06:42:38,770 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 170 flow [2025-03-17 06:42:38,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2025-03-17 06:42:38,770 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:38,770 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:42:38,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 06:42:38,773 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 2 more)] === [2025-03-17 06:42:38,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:38,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1150626383, now seen corresponding path program 1 times [2025-03-17 06:42:38,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:38,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735905508] [2025-03-17 06:42:38,774 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:42:38,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:38,786 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-17 06:42:38,799 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-17 06:42:38,800 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:42:38,800 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:38,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:42:38,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:38,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735905508] [2025-03-17 06:42:38,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735905508] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:42:38,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:42:38,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 06:42:38,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944719620] [2025-03-17 06:42:38,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:42:38,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 06:42:38,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:38,901 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 06:42:38,901 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 06:42:38,901 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-17 06:42:38,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2025-03-17 06:42:38,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:38,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-17 06:42:38,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:39,668 INFO L124 PetriNetUnfolderBase]: 10316/15076 cut-off events. [2025-03-17 06:42:39,668 INFO L125 PetriNetUnfolderBase]: For 5648/5648 co-relation queries the response was YES. [2025-03-17 06:42:39,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33501 conditions, 15076 events. 10316/15076 cut-off events. For 5648/5648 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 93263 event pairs, 8685 based on Foata normal form. 335/15316 useless extension candidates. Maximal degree in co-relation 25633. Up to 10444 conditions per place. [2025-03-17 06:42:39,748 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 65 selfloop transitions, 5 changer transitions 1/80 dead transitions. [2025-03-17 06:42:39,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 80 transitions, 398 flow [2025-03-17 06:42:39,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 06:42:39,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 06:42:39,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2025-03-17 06:42:39,750 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.59375 [2025-03-17 06:42:39,750 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 170 flow. Second operand 4 states and 114 transitions. [2025-03-17 06:42:39,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 80 transitions, 398 flow [2025-03-17 06:42:39,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 80 transitions, 392 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-03-17 06:42:39,753 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 188 flow [2025-03-17 06:42:39,753 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2025-03-17 06:42:39,754 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 9 predicate places. [2025-03-17 06:42:39,754 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 188 flow [2025-03-17 06:42:39,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2025-03-17 06:42:39,754 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:39,754 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:42:39,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-17 06:42:39,755 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 2 more)] === [2025-03-17 06:42:39,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:39,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1139343320, now seen corresponding path program 1 times [2025-03-17 06:42:39,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:39,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731044689] [2025-03-17 06:42:39,755 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:42:39,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:39,765 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-17 06:42:39,794 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-17 06:42:39,797 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:42:39,798 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:40,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:40,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:40,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731044689] [2025-03-17 06:42:40,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731044689] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:42:40,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:42:40,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:42:40,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117610251] [2025-03-17 06:42:40,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:42:40,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:42:40,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:40,216 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:42:40,217 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-17 06:42:40,224 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2025-03-17 06:42:40,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 188 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:42:40,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:40,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2025-03-17 06:42:40,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:41,889 INFO L124 PetriNetUnfolderBase]: 21444/30133 cut-off events. [2025-03-17 06:42:41,889 INFO L125 PetriNetUnfolderBase]: For 9312/9322 co-relation queries the response was YES. [2025-03-17 06:42:41,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68065 conditions, 30133 events. 21444/30133 cut-off events. For 9312/9322 co-relation queries the response was YES. Maximal size of possible extension queue 1112. Compared 188965 event pairs, 3781 based on Foata normal form. 4/26724 useless extension candidates. Maximal degree in co-relation 51320. Up to 18522 conditions per place. [2025-03-17 06:42:42,023 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 123 selfloop transitions, 11 changer transitions 6/147 dead transitions. [2025-03-17 06:42:42,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 147 transitions, 716 flow [2025-03-17 06:42:42,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:42:42,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:42:42,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2025-03-17 06:42:42,024 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6220238095238095 [2025-03-17 06:42:42,024 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 188 flow. Second operand 7 states and 209 transitions. [2025-03-17 06:42:42,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 147 transitions, 716 flow [2025-03-17 06:42:42,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 147 transitions, 706 flow, removed 3 selfloop flow, removed 1 redundant places. [2025-03-17 06:42:42,030 INFO L231 Difference]: Finished difference. Result has 69 places, 62 transitions, 275 flow [2025-03-17 06:42:42,030 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=275, PETRI_PLACES=69, PETRI_TRANSITIONS=62} [2025-03-17 06:42:42,030 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 19 predicate places. [2025-03-17 06:42:42,030 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 62 transitions, 275 flow [2025-03-17 06:42:42,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:42:42,031 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:42,031 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:42:42,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-17 06:42:42,031 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 2 more)] === [2025-03-17 06:42:42,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:42,031 INFO L85 PathProgramCache]: Analyzing trace with hash 580712924, now seen corresponding path program 1 times [2025-03-17 06:42:42,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:42,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446024898] [2025-03-17 06:42:42,032 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:42:42,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:42,039 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-17 06:42:42,051 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-17 06:42:42,051 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:42:42,051 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:42,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:42,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:42,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446024898] [2025-03-17 06:42:42,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446024898] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:42:42,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525653412] [2025-03-17 06:42:42,449 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:42:42,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:42:42,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:42:42,452 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) [2025-03-17 06:42:42,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 06:42:42,510 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-17 06:42:42,541 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-17 06:42:42,541 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:42:42,542 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:42,544 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 06:42:42,547 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:42:42,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:42:42,738 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 06:42:42,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525653412] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:42:42,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 06:42:42,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2025-03-17 06:42:42,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214559587] [2025-03-17 06:42:42,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:42:42,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:42:42,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:42,739 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:42:42,739 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2025-03-17 06:42:42,746 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2025-03-17 06:42:42,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 62 transitions, 275 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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) [2025-03-17 06:42:42,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:42,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2025-03-17 06:42:42,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:44,718 INFO L124 PetriNetUnfolderBase]: 19946/29336 cut-off events. [2025-03-17 06:42:44,719 INFO L125 PetriNetUnfolderBase]: For 24719/24723 co-relation queries the response was YES. [2025-03-17 06:42:44,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77503 conditions, 29336 events. 19946/29336 cut-off events. For 24719/24723 co-relation queries the response was YES. Maximal size of possible extension queue 1162. Compared 202778 event pairs, 1345 based on Foata normal form. 178/29491 useless extension candidates. Maximal degree in co-relation 57837. Up to 12808 conditions per place. [2025-03-17 06:42:44,929 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 147 selfloop transitions, 10 changer transitions 1/167 dead transitions. [2025-03-17 06:42:44,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 167 transitions, 967 flow [2025-03-17 06:42:44,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:42:44,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:42:44,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2025-03-17 06:42:44,931 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6369047619047619 [2025-03-17 06:42:44,931 INFO L175 Difference]: Start difference. First operand has 69 places, 62 transitions, 275 flow. Second operand 7 states and 214 transitions. [2025-03-17 06:42:44,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 167 transitions, 967 flow [2025-03-17 06:42:45,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 167 transitions, 967 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-17 06:42:45,031 INFO L231 Difference]: Finished difference. Result has 79 places, 65 transitions, 328 flow [2025-03-17 06:42:45,031 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=328, PETRI_PLACES=79, PETRI_TRANSITIONS=65} [2025-03-17 06:42:45,032 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 29 predicate places. [2025-03-17 06:42:45,033 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 65 transitions, 328 flow [2025-03-17 06:42:45,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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) [2025-03-17 06:42:45,035 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:45,035 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:42:45,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-17 06:42:45,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:42:45,236 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 2 more)] === [2025-03-17 06:42:45,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:45,236 INFO L85 PathProgramCache]: Analyzing trace with hash -570841290, now seen corresponding path program 2 times [2025-03-17 06:42:45,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:45,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352221423] [2025-03-17 06:42:45,237 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:42:45,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:45,247 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-03-17 06:42:45,264 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 35 of 36 statements. [2025-03-17 06:42:45,267 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:42:45,267 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:45,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:45,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:45,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352221423] [2025-03-17 06:42:45,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352221423] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:42:45,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:42:45,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 06:42:45,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844221790] [2025-03-17 06:42:45,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:42:45,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:42:45,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:45,541 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:42:45,541 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-17 06:42:45,551 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2025-03-17 06:42:45,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 65 transitions, 328 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 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) [2025-03-17 06:42:45,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:45,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2025-03-17 06:42:45,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:47,814 INFO L124 PetriNetUnfolderBase]: 23706/34480 cut-off events. [2025-03-17 06:42:47,814 INFO L125 PetriNetUnfolderBase]: For 53707/53707 co-relation queries the response was YES. [2025-03-17 06:42:47,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104873 conditions, 34480 events. 23706/34480 cut-off events. For 53707/53707 co-relation queries the response was YES. Maximal size of possible extension queue 1419. Compared 236875 event pairs, 3255 based on Foata normal form. 514/34794 useless extension candidates. Maximal degree in co-relation 81780. Up to 17370 conditions per place. [2025-03-17 06:42:48,110 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 152 selfloop transitions, 17 changer transitions 4/182 dead transitions. [2025-03-17 06:42:48,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 182 transitions, 1094 flow [2025-03-17 06:42:48,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:42:48,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:42:48,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 264 transitions. [2025-03-17 06:42:48,113 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2025-03-17 06:42:48,113 INFO L175 Difference]: Start difference. First operand has 79 places, 65 transitions, 328 flow. Second operand 9 states and 264 transitions. [2025-03-17 06:42:48,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 182 transitions, 1094 flow [2025-03-17 06:42:48,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 182 transitions, 1076 flow, removed 1 selfloop flow, removed 3 redundant places. [2025-03-17 06:42:48,646 INFO L231 Difference]: Finished difference. Result has 88 places, 73 transitions, 445 flow [2025-03-17 06:42:48,647 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=445, PETRI_PLACES=88, PETRI_TRANSITIONS=73} [2025-03-17 06:42:48,647 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 38 predicate places. [2025-03-17 06:42:48,647 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 73 transitions, 445 flow [2025-03-17 06:42:48,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 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) [2025-03-17 06:42:48,647 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:48,648 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:42:48,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-17 06:42:48,648 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 2 more)] === [2025-03-17 06:42:48,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:48,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1744615860, now seen corresponding path program 3 times [2025-03-17 06:42:48,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:48,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438898715] [2025-03-17 06:42:48,648 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:42:48,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:48,656 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 36 statements into 2 equivalence classes. [2025-03-17 06:42:48,667 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-03-17 06:42:48,668 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:42:48,668 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:48,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:42:48,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:48,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438898715] [2025-03-17 06:42:48,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438898715] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:42:48,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690194587] [2025-03-17 06:42:48,924 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:42:48,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:42:48,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:42:48,926 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) [2025-03-17 06:42:48,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 06:42:48,978 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 36 statements into 2 equivalence classes. [2025-03-17 06:42:49,004 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-03-17 06:42:49,004 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:42:49,004 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:49,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-17 06:42:49,008 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:42:49,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:42:49,350 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 06:42:49,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690194587] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:42:49,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 06:42:49,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2025-03-17 06:42:49,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461591546] [2025-03-17 06:42:49,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:42:49,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 06:42:49,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:49,350 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 06:42:49,350 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2025-03-17 06:42:49,360 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2025-03-17 06:42:49,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 73 transitions, 445 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 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) [2025-03-17 06:42:49,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:49,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2025-03-17 06:42:49,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:55,113 INFO L124 PetriNetUnfolderBase]: 46326/65594 cut-off events. [2025-03-17 06:42:55,114 INFO L125 PetriNetUnfolderBase]: For 134339/134339 co-relation queries the response was YES. [2025-03-17 06:42:55,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211754 conditions, 65594 events. 46326/65594 cut-off events. For 134339/134339 co-relation queries the response was YES. Maximal size of possible extension queue 2680. Compared 454793 event pairs, 9623 based on Foata normal form. 687/62266 useless extension candidates. Maximal degree in co-relation 169543. Up to 44451 conditions per place. [2025-03-17 06:42:55,705 INFO L140 encePairwiseOnDemand]: 33/48 looper letters, 168 selfloop transitions, 76 changer transitions 29/279 dead transitions. [2025-03-17 06:42:55,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 279 transitions, 2224 flow [2025-03-17 06:42:55,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-17 06:42:55,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-17 06:42:55,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 373 transitions. [2025-03-17 06:42:55,708 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5180555555555556 [2025-03-17 06:42:55,708 INFO L175 Difference]: Start difference. First operand has 88 places, 73 transitions, 445 flow. Second operand 15 states and 373 transitions. [2025-03-17 06:42:55,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 279 transitions, 2224 flow [2025-03-17 06:42:57,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 279 transitions, 2166 flow, removed 9 selfloop flow, removed 2 redundant places. [2025-03-17 06:42:57,473 INFO L231 Difference]: Finished difference. Result has 112 places, 140 transitions, 1363 flow [2025-03-17 06:42:57,473 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1363, PETRI_PLACES=112, PETRI_TRANSITIONS=140} [2025-03-17 06:42:57,474 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 62 predicate places. [2025-03-17 06:42:57,474 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 140 transitions, 1363 flow [2025-03-17 06:42:57,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 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) [2025-03-17 06:42:57,474 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:57,474 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:42:57,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-17 06:42:57,675 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,SelfDestructingSolverStorable8 [2025-03-17 06:42:57,675 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 2 more)] === [2025-03-17 06:42:57,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:57,675 INFO L85 PathProgramCache]: Analyzing trace with hash -418974866, now seen corresponding path program 4 times [2025-03-17 06:42:57,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:57,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170572700] [2025-03-17 06:42:57,676 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:42:57,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:57,684 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 36 statements into 2 equivalence classes. [2025-03-17 06:42:57,699 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-03-17 06:42:57,699 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:42:57,699 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:42:57,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:57,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170572700] [2025-03-17 06:42:57,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170572700] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:42:57,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:42:57,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:42:57,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984952284] [2025-03-17 06:42:57,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:42:57,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:42:57,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:57,959 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:42:57,959 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-17 06:42:57,979 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2025-03-17 06:42:57,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 140 transitions, 1363 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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) [2025-03-17 06:42:57,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:57,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2025-03-17 06:42:57,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:43:05,231 INFO L124 PetriNetUnfolderBase]: 53402/79916 cut-off events. [2025-03-17 06:43:05,232 INFO L125 PetriNetUnfolderBase]: For 363467/368426 co-relation queries the response was YES. [2025-03-17 06:43:05,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350287 conditions, 79916 events. 53402/79916 cut-off events. For 363467/368426 co-relation queries the response was YES. Maximal size of possible extension queue 3370. Compared 632383 event pairs, 11427 based on Foata normal form. 1770/79046 useless extension candidates. Maximal degree in co-relation 291248. Up to 36475 conditions per place. [2025-03-17 06:43:06,162 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 241 selfloop transitions, 138 changer transitions 9/400 dead transitions. [2025-03-17 06:43:06,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 400 transitions, 4278 flow [2025-03-17 06:43:06,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 06:43:06,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-17 06:43:06,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 324 transitions. [2025-03-17 06:43:06,163 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6136363636363636 [2025-03-17 06:43:06,163 INFO L175 Difference]: Start difference. First operand has 112 places, 140 transitions, 1363 flow. Second operand 11 states and 324 transitions. [2025-03-17 06:43:06,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 400 transitions, 4278 flow [2025-03-17 06:43:11,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 400 transitions, 4248 flow, removed 15 selfloop flow, removed 0 redundant places. [2025-03-17 06:43:11,861 INFO L231 Difference]: Finished difference. Result has 131 places, 231 transitions, 2978 flow [2025-03-17 06:43:11,861 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1351, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2978, PETRI_PLACES=131, PETRI_TRANSITIONS=231} [2025-03-17 06:43:11,864 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 81 predicate places. [2025-03-17 06:43:11,864 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 231 transitions, 2978 flow [2025-03-17 06:43:11,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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) [2025-03-17 06:43:11,864 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:11,864 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:43:11,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-17 06:43:11,864 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 2 more)] === [2025-03-17 06:43:11,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:11,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1833030850, now seen corresponding path program 5 times [2025-03-17 06:43:11,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:11,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182426126] [2025-03-17 06:43:11,865 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:43:11,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:11,879 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-03-17 06:43:11,898 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-03-17 06:43:11,898 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:43:11,898 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:43:12,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:12,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182426126] [2025-03-17 06:43:12,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182426126] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:43:12,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:43:12,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:43:12,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022862739] [2025-03-17 06:43:12,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:43:12,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:43:12,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:12,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:43:12,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-17 06:43:12,119 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2025-03-17 06:43:12,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 231 transitions, 2978 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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) [2025-03-17 06:43:12,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:12,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2025-03-17 06:43:12,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand