./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/stack_longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8ab0bd5 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/pthread/stack_longest-2.i -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 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 --- Real Ultimate output --- This is Ultimate 0.3.0-?-f8ab0bd-m [2025-03-13 21:25:53,260 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-13 21:25:53,309 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-13 21:25:53,313 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-13 21:25:53,313 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-13 21:25:53,327 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-13 21:25:53,327 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-13 21:25:53,327 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-13 21:25:53,327 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-13 21:25:53,328 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-13 21:25:53,328 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-13 21:25:53,328 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-13 21:25:53,328 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-13 21:25:53,328 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-13 21:25:53,328 INFO L153 SettingsManager]: * Use SBE=true [2025-03-13 21:25:53,328 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-13 21:25:53,328 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-13 21:25:53,329 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-13 21:25:53,329 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-13 21:25:53,329 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-13 21:25:53,329 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-13 21:25:53,329 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-13 21:25:53,329 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-13 21:25:53,329 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-13 21:25:53,329 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-13 21:25:53,329 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-13 21:25:53,329 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-13 21:25:53,329 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-13 21:25:53,329 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-13 21:25:53,330 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-13 21:25:53,330 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-13 21:25:53,330 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-13 21:25:53,330 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-13 21:25:53,330 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-13 21:25:53,330 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-13 21:25:53,330 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-13 21:25:53,330 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-13 21:25:53,330 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-13 21:25:53,330 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-13 21:25:53,330 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-13 21:25:53,330 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-13 21:25:53,330 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-13 21:25:53,330 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-13 21:25:53,330 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 -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 [2025-03-13 21:25:53,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-13 21:25:53,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-13 21:25:53,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-13 21:25:53,587 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-13 21:25:53,587 INFO L274 PluginConnector]: CDTParser initialized [2025-03-13 21:25:53,588 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/stack_longest-2.i [2025-03-13 21:25:54,774 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c92aafadb/12ec4c79ab0045ceb23c5e423af9501e/FLAG5c458092e [2025-03-13 21:25:55,176 INFO L384 CDTParser]: Found 1 translation units. [2025-03-13 21:25:55,178 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack_longest-2.i [2025-03-13 21:25:55,193 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c92aafadb/12ec4c79ab0045ceb23c5e423af9501e/FLAG5c458092e [2025-03-13 21:25:55,204 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c92aafadb/12ec4c79ab0045ceb23c5e423af9501e [2025-03-13 21:25:55,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-13 21:25:55,207 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-13 21:25:55,208 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-13 21:25:55,208 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-13 21:25:55,212 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-13 21:25:55,212 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.03 09:25:55" (1/1) ... [2025-03-13 21:25:55,213 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35768e98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:25:55, skipping insertion in model container [2025-03-13 21:25:55,215 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.03 09:25:55" (1/1) ... [2025-03-13 21:25:55,240 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-13 21:25:55,604 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/pthread/stack_longest-2.i[41530,41543] [2025-03-13 21:25:55,626 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-13 21:25:55,661 INFO L200 MainTranslator]: Completed pre-run [2025-03-13 21:25:55,685 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/pthread/stack_longest-2.i[41530,41543] [2025-03-13 21:25:55,691 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-13 21:25:55,774 INFO L204 MainTranslator]: Completed translation [2025-03-13 21:25:55,774 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:25:55 WrapperNode [2025-03-13 21:25:55,774 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-13 21:25:55,775 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-13 21:25:55,775 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-13 21:25:55,775 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-13 21:25:55,779 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:25:55" (1/1) ... [2025-03-13 21:25:55,806 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:25:55" (1/1) ... [2025-03-13 21:25:55,849 INFO L138 Inliner]: procedures = 277, calls = 830, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 939 [2025-03-13 21:25:55,849 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-13 21:25:55,850 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-13 21:25:55,850 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-13 21:25:55,850 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-13 21:25:55,856 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:25:55" (1/1) ... [2025-03-13 21:25:55,856 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:25:55" (1/1) ... [2025-03-13 21:25:55,869 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:25:55" (1/1) ... [2025-03-13 21:25:55,902 INFO L175 MemorySlicer]: Split 809 memory accesses to 3 slices as follows [2, 5, 802]. 99 percent of accesses are in the largest equivalence class. The 807 initializations are split as follows [2, 5, 800]. The 1 writes are split as follows [0, 0, 1]. [2025-03-13 21:25:55,907 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:25:55" (1/1) ... [2025-03-13 21:25:55,908 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:25:55" (1/1) ... [2025-03-13 21:25:55,938 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:25:55" (1/1) ... [2025-03-13 21:25:55,942 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:25:55" (1/1) ... [2025-03-13 21:25:55,945 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:25:55" (1/1) ... [2025-03-13 21:25:55,949 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:25:55" (1/1) ... [2025-03-13 21:25:55,958 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-13 21:25:55,958 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-13 21:25:55,958 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-13 21:25:55,959 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-13 21:25:55,959 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:25:55" (1/1) ... [2025-03-13 21:25:55,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-13 21:25:55,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:25:55,988 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) [2025-03-13 21:25:55,991 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 [2025-03-13 21:25:56,008 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-03-13 21:25:56,008 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-03-13 21:25:56,008 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-03-13 21:25:56,008 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-03-13 21:25:56,009 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-03-13 21:25:56,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-13 21:25:56,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-13 21:25:56,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-13 21:25:56,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-13 21:25:56,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-13 21:25:56,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-13 21:25:56,010 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-03-13 21:25:56,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-13 21:25:56,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-13 21:25:56,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-13 21:25:56,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-13 21:25:56,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-13 21:25:56,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-13 21:25:56,011 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-13 21:25:56,128 INFO L256 CfgBuilder]: Building ICFG [2025-03-13 21:25:56,130 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-13 21:25:57,052 INFO L1326 $ProcedureCfgBuilder]: dead code at ProgramPoint L985-1: pop_#res#1 := 0; [2025-03-13 21:25:57,052 INFO L1326 $ProcedureCfgBuilder]: dead code at ProgramPoint L983: havoc pop_#t~mem37#1; [2025-03-13 21:25:57,052 INFO L1326 $ProcedureCfgBuilder]: dead code at ProgramPoint L983-1: havoc pop_#t~ret36#1; [2025-03-13 21:25:57,053 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-13 21:25:57,054 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-13 21:25:57,054 INFO L318 CfgBuilder]: Performing block encoding [2025-03-13 21:26:08,647 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-13 21:26:08,647 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:26:08 BoogieIcfgContainer [2025-03-13 21:26:08,648 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-13 21:26:08,649 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-13 21:26:08,649 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-13 21:26:08,652 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-13 21:26:08,653 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.03 09:25:55" (1/3) ... [2025-03-13 21:26:08,653 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2838984e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.03 09:26:08, skipping insertion in model container [2025-03-13 21:26:08,654 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:25:55" (2/3) ... [2025-03-13 21:26:08,654 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2838984e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.03 09:26:08, skipping insertion in model container [2025-03-13 21:26:08,654 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:26:08" (3/3) ... [2025-03-13 21:26:08,655 INFO L128 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2025-03-13 21:26:08,666 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-13 21:26:08,668 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG stack_longest-2.i that has 3 procedures, 30 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2025-03-13 21:26:08,668 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-13 21:26:08,727 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-13 21:26:08,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 34 transitions, 82 flow [2025-03-13 21:26:08,814 INFO L124 PetriNetUnfolderBase]: 5/32 cut-off events. [2025-03-13 21:26:08,818 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-13 21:26:08,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 32 events. 5/32 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 64 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 29. Up to 3 conditions per place. [2025-03-13 21:26:08,821 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 34 transitions, 82 flow [2025-03-13 21:26:08,824 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 30 transitions, 69 flow [2025-03-13 21:26:08,833 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-13 21:26:08,843 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;@7c315103, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-13 21:26:08,844 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2025-03-13 21:26:08,881 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-13 21:26:08,881 INFO L124 PetriNetUnfolderBase]: 1/19 cut-off events. [2025-03-13 21:26:08,881 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-13 21:26:08,881 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:26:08,882 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:26:08,882 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:26:08,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:26:08,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1317435824, now seen corresponding path program 1 times [2025-03-13 21:26:08,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:26:08,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748698568] [2025-03-13 21:26:08,894 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:26:08,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:26:08,998 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-13 21:26:09,179 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-13 21:26:09,180 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:26:09,180 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:09,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:09,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:26:09,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748698568] [2025-03-13 21:26:09,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748698568] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:26:09,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:26:09,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-13 21:26:09,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255256722] [2025-03-13 21:26:09,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:26:09,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-13 21:26:09,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:26:09,720 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-13 21:26:09,721 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-13 21:26:09,727 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-03-13 21:26:09,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 69 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:26:09,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:26:09,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-03-13 21:26:09,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:26:09,949 INFO L124 PetriNetUnfolderBase]: 307/564 cut-off events. [2025-03-13 21:26:09,949 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2025-03-13 21:26:09,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1120 conditions, 564 events. 307/564 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2467 event pairs, 53 based on Foata normal form. 40/558 useless extension candidates. Maximal degree in co-relation 1043. Up to 358 conditions per place. [2025-03-13 21:26:09,957 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 41 selfloop transitions, 3 changer transitions 2/52 dead transitions. [2025-03-13 21:26:09,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 52 transitions, 214 flow [2025-03-13 21:26:09,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-13 21:26:09,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-13 21:26:09,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2025-03-13 21:26:09,968 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6102941176470589 [2025-03-13 21:26:09,969 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 69 flow. Second operand 4 states and 83 transitions. [2025-03-13 21:26:09,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 52 transitions, 214 flow [2025-03-13 21:26:09,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 52 transitions, 205 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-13 21:26:09,975 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 82 flow [2025-03-13 21:26:09,978 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=82, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2025-03-13 21:26:09,980 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2025-03-13 21:26:09,980 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 82 flow [2025-03-13 21:26:09,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:26:09,981 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:26:09,982 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:26:09,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-13 21:26:09,982 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:26:09,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:26:09,983 INFO L85 PathProgramCache]: Analyzing trace with hash 780898027, now seen corresponding path program 1 times [2025-03-13 21:26:09,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:26:09,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642653870] [2025-03-13 21:26:09,983 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:26:09,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:26:10,021 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-13 21:26:10,060 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-13 21:26:10,061 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:26:10,061 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:10,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:10,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:26:10,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642653870] [2025-03-13 21:26:10,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642653870] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:26:10,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746613175] [2025-03-13 21:26:10,480 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:26:10,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:26:10,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:26:10,482 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) [2025-03-13 21:26:10,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-13 21:26:10,567 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-13 21:26:10,782 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-13 21:26:10,783 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:26:10,783 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:10,791 INFO L256 TraceCheckSpWp]: Trace formula consists of 1719 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-13 21:26:10,797 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:26:10,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-13 21:26:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:10,921 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:26:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:10,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746613175] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:26:10,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:26:10,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2025-03-13 21:26:10,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462021471] [2025-03-13 21:26:10,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:26:10,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-13 21:26:10,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:26:10,991 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-13 21:26:10,991 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2025-03-13 21:26:10,995 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-13 21:26:10,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 82 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 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) [2025-03-13 21:26:10,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:26:10,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-13 21:26:10,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:26:11,550 INFO L124 PetriNetUnfolderBase]: 1257/2332 cut-off events. [2025-03-13 21:26:11,550 INFO L125 PetriNetUnfolderBase]: For 297/299 co-relation queries the response was YES. [2025-03-13 21:26:11,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4920 conditions, 2332 events. 1257/2332 cut-off events. For 297/299 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 12417 event pairs, 153 based on Foata normal form. 48/2272 useless extension candidates. Maximal degree in co-relation 4362. Up to 365 conditions per place. [2025-03-13 21:26:11,565 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 163 selfloop transitions, 32 changer transitions 4/204 dead transitions. [2025-03-13 21:26:11,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 204 transitions, 900 flow [2025-03-13 21:26:11,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-13 21:26:11,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-13 21:26:11,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 313 transitions. [2025-03-13 21:26:11,569 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6137254901960785 [2025-03-13 21:26:11,570 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 82 flow. Second operand 15 states and 313 transitions. [2025-03-13 21:26:11,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 204 transitions, 900 flow [2025-03-13 21:26:11,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 204 transitions, 896 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-13 21:26:11,576 INFO L231 Difference]: Finished difference. Result has 54 places, 66 transitions, 329 flow [2025-03-13 21:26:11,576 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=329, PETRI_PLACES=54, PETRI_TRANSITIONS=66} [2025-03-13 21:26:11,577 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 22 predicate places. [2025-03-13 21:26:11,577 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 66 transitions, 329 flow [2025-03-13 21:26:11,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 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) [2025-03-13 21:26:11,577 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:26:11,577 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:26:11,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-13 21:26:11,778 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:26:11,778 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:26:11,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:26:11,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1405512292, now seen corresponding path program 1 times [2025-03-13 21:26:11,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:26:11,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872110447] [2025-03-13 21:26:11,781 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:26:11,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:26:11,809 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-13 21:26:11,832 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-13 21:26:11,832 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:26:11,832 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:12,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:12,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:26:12,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872110447] [2025-03-13 21:26:12,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872110447] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:26:12,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:26:12,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-13 21:26:12,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374723940] [2025-03-13 21:26:12,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:26:12,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-13 21:26:12,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:26:12,064 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-13 21:26:12,064 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-13 21:26:12,064 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-03-13 21:26:12,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 66 transitions, 329 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2025-03-13 21:26:12,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:26:12,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-03-13 21:26:12,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:26:12,350 INFO L124 PetriNetUnfolderBase]: 669/1351 cut-off events. [2025-03-13 21:26:12,351 INFO L125 PetriNetUnfolderBase]: For 601/601 co-relation queries the response was YES. [2025-03-13 21:26:12,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3062 conditions, 1351 events. 669/1351 cut-off events. For 601/601 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 6861 event pairs, 231 based on Foata normal form. 66/1398 useless extension candidates. Maximal degree in co-relation 2914. Up to 634 conditions per place. [2025-03-13 21:26:12,359 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 43 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2025-03-13 21:26:12,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 59 transitions, 339 flow [2025-03-13 21:26:12,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-13 21:26:12,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-13 21:26:12,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2025-03-13 21:26:12,361 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5686274509803921 [2025-03-13 21:26:12,361 INFO L175 Difference]: Start difference. First operand has 54 places, 66 transitions, 329 flow. Second operand 3 states and 58 transitions. [2025-03-13 21:26:12,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 59 transitions, 339 flow [2025-03-13 21:26:12,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 307 flow, removed 16 selfloop flow, removed 3 redundant places. [2025-03-13 21:26:12,371 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 198 flow [2025-03-13 21:26:12,372 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2025-03-13 21:26:12,372 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 18 predicate places. [2025-03-13 21:26:12,373 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 198 flow [2025-03-13 21:26:12,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2025-03-13 21:26:12,373 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:26:12,373 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:26:12,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-13 21:26:12,373 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:26:12,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:26:12,374 INFO L85 PathProgramCache]: Analyzing trace with hash 461484055, now seen corresponding path program 1 times [2025-03-13 21:26:12,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:26:12,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609113461] [2025-03-13 21:26:12,374 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:26:12,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:26:12,402 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-13 21:26:12,476 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-13 21:26:12,476 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:26:12,476 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:13,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:13,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:26:13,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609113461] [2025-03-13 21:26:13,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609113461] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:26:13,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:26:13,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-13 21:26:13,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187830404] [2025-03-13 21:26:13,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:26:13,823 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:26:13,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:26:13,823 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:26:13,823 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-13 21:26:13,827 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-13 21:26:13,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:26:13,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:26:13,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-13 21:26:13,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:26:14,088 INFO L124 PetriNetUnfolderBase]: 813/1606 cut-off events. [2025-03-13 21:26:14,089 INFO L125 PetriNetUnfolderBase]: For 562/562 co-relation queries the response was YES. [2025-03-13 21:26:14,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3740 conditions, 1606 events. 813/1606 cut-off events. For 562/562 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 8135 event pairs, 244 based on Foata normal form. 0/1550 useless extension candidates. Maximal degree in co-relation 3360. Up to 823 conditions per place. [2025-03-13 21:26:14,099 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 60 selfloop transitions, 13 changer transitions 6/84 dead transitions. [2025-03-13 21:26:14,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 84 transitions, 463 flow [2025-03-13 21:26:14,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-13 21:26:14,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-13 21:26:14,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2025-03-13 21:26:14,102 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5529411764705883 [2025-03-13 21:26:14,102 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 198 flow. Second operand 5 states and 94 transitions. [2025-03-13 21:26:14,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 84 transitions, 463 flow [2025-03-13 21:26:14,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 84 transitions, 452 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-13 21:26:14,108 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 284 flow [2025-03-13 21:26:14,109 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=284, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2025-03-13 21:26:14,110 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 24 predicate places. [2025-03-13 21:26:14,110 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 284 flow [2025-03-13 21:26:14,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-13 21:26:14,110 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:26:14,110 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:26:14,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-13 21:26:14,110 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:26:14,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:26:14,111 INFO L85 PathProgramCache]: Analyzing trace with hash -968181834, now seen corresponding path program 1 times [2025-03-13 21:26:14,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:26:14,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519773366] [2025-03-13 21:26:14,111 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:26:14,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:26:14,140 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-13 21:26:14,189 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-13 21:26:14,190 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:26:14,190 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:15,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:15,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:26:15,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519773366] [2025-03-13 21:26:15,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519773366] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:26:15,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197829368] [2025-03-13 21:26:15,216 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:26:15,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:26:15,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:26:15,218 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) [2025-03-13 21:26:15,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-13 21:26:15,287 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-13 21:26:15,478 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-13 21:26:15,478 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:26:15,478 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:15,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 1764 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-13 21:26:15,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:26:15,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-13 21:26:15,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2025-03-13 21:26:15,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 32 [2025-03-13 21:26:15,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:15,708 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:26:15,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2025-03-13 21:26:15,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:15,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197829368] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:26:15,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:26:15,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2025-03-13 21:26:15,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567486908] [2025-03-13 21:26:15,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:26:15,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-13 21:26:16,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:26:16,000 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-13 21:26:16,001 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2025-03-13 21:26:16,003 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-13 21:26:16,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 284 flow. Second operand has 14 states, 14 states have (on average 10.857142857142858) internal successors, (152), 14 states have internal predecessors, (152), 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) [2025-03-13 21:26:16,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:26:16,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-13 21:26:16,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:26:17,414 INFO L124 PetriNetUnfolderBase]: 2192/4299 cut-off events. [2025-03-13 21:26:17,414 INFO L125 PetriNetUnfolderBase]: For 3081/3081 co-relation queries the response was YES. [2025-03-13 21:26:17,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10084 conditions, 4299 events. 2192/4299 cut-off events. For 3081/3081 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 26270 event pairs, 313 based on Foata normal form. 0/4285 useless extension candidates. Maximal degree in co-relation 9092. Up to 701 conditions per place. [2025-03-13 21:26:17,439 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 277 selfloop transitions, 69 changer transitions 40/391 dead transitions. [2025-03-13 21:26:17,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 391 transitions, 2168 flow [2025-03-13 21:26:17,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-03-13 21:26:17,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2025-03-13 21:26:17,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 615 transitions. [2025-03-13 21:26:17,443 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5320069204152249 [2025-03-13 21:26:17,443 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 284 flow. Second operand 34 states and 615 transitions. [2025-03-13 21:26:17,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 391 transitions, 2168 flow [2025-03-13 21:26:17,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 391 transitions, 2160 flow, removed 3 selfloop flow, removed 1 redundant places. [2025-03-13 21:26:17,461 INFO L231 Difference]: Finished difference. Result has 96 places, 105 transitions, 784 flow [2025-03-13 21:26:17,462 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=784, PETRI_PLACES=96, PETRI_TRANSITIONS=105} [2025-03-13 21:26:17,463 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 64 predicate places. [2025-03-13 21:26:17,463 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 105 transitions, 784 flow [2025-03-13 21:26:17,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.857142857142858) internal successors, (152), 14 states have internal predecessors, (152), 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) [2025-03-13 21:26:17,464 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:26:17,464 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:26:17,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-13 21:26:17,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:26:17,665 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:26:17,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:26:17,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1849627845, now seen corresponding path program 1 times [2025-03-13 21:26:17,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:26:17,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941088130] [2025-03-13 21:26:17,665 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:26:17,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:26:17,687 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-13 21:26:17,702 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-13 21:26:17,702 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:26:17,702 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:18,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-13 21:26:18,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:26:18,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941088130] [2025-03-13 21:26:18,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941088130] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:26:18,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:26:18,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-13 21:26:18,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925426329] [2025-03-13 21:26:18,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:26:18,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-13 21:26:18,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:26:18,007 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-13 21:26:18,007 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-13 21:26:18,008 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-13 21:26:18,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 105 transitions, 784 flow. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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) [2025-03-13 21:26:18,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:26:18,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-13 21:26:18,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:26:18,429 INFO L124 PetriNetUnfolderBase]: 2366/4672 cut-off events. [2025-03-13 21:26:18,429 INFO L125 PetriNetUnfolderBase]: For 5730/5730 co-relation queries the response was YES. [2025-03-13 21:26:18,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11550 conditions, 4672 events. 2366/4672 cut-off events. For 5730/5730 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 29668 event pairs, 599 based on Foata normal form. 18/4683 useless extension candidates. Maximal degree in co-relation 11249. Up to 1553 conditions per place. [2025-03-13 21:26:18,459 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 83 selfloop transitions, 61 changer transitions 2/151 dead transitions. [2025-03-13 21:26:18,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 151 transitions, 1254 flow [2025-03-13 21:26:18,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-13 21:26:18,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-13 21:26:18,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2025-03-13 21:26:18,461 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5490196078431373 [2025-03-13 21:26:18,461 INFO L175 Difference]: Start difference. First operand has 96 places, 105 transitions, 784 flow. Second operand 6 states and 112 transitions. [2025-03-13 21:26:18,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 151 transitions, 1254 flow [2025-03-13 21:26:18,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 151 transitions, 1207 flow, removed 21 selfloop flow, removed 1 redundant places. [2025-03-13 21:26:18,476 INFO L231 Difference]: Finished difference. Result has 102 places, 114 transitions, 988 flow [2025-03-13 21:26:18,476 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=988, PETRI_PLACES=102, PETRI_TRANSITIONS=114} [2025-03-13 21:26:18,477 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 70 predicate places. [2025-03-13 21:26:18,477 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 114 transitions, 988 flow [2025-03-13 21:26:18,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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) [2025-03-13 21:26:18,477 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:26:18,477 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:26:18,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-13 21:26:18,477 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:26:18,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:26:18,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1363535238, now seen corresponding path program 1 times [2025-03-13 21:26:18,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:26:18,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364160624] [2025-03-13 21:26:18,478 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:26:18,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:26:18,496 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-13 21:26:18,549 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-13 21:26:18,550 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:26:18,550 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:19,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:26:19,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364160624] [2025-03-13 21:26:19,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364160624] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:26:19,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690262866] [2025-03-13 21:26:19,494 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:26:19,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:26:19,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:26:19,498 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:26:19,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-13 21:26:19,569 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-13 21:26:19,738 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-13 21:26:19,738 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:26:19,738 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:19,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 1789 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-13 21:26:19,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:26:19,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-03-13 21:26:19,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2025-03-13 21:26:19,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 94 [2025-03-13 21:26:19,886 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:26:19,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 43 [2025-03-13 21:26:20,276 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:26:20,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 57 [2025-03-13 21:26:20,309 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:20,310 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:26:20,723 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:26:20,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 12 [2025-03-13 21:26:20,746 INFO L349 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2025-03-13 21:26:20,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 63 [2025-03-13 21:26:20,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:20,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690262866] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:26:20,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:26:20,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2025-03-13 21:26:20,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541454959] [2025-03-13 21:26:20,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:26:20,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-13 21:26:20,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:26:20,803 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-13 21:26:20,804 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2025-03-13 21:26:20,808 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-13 21:26:20,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 114 transitions, 988 flow. Second operand has 17 states, 17 states have (on average 11.058823529411764) internal successors, (188), 17 states have internal predecessors, (188), 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) [2025-03-13 21:26:20,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:26:20,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-13 21:26:20,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:26:22,921 INFO L124 PetriNetUnfolderBase]: 4276/8447 cut-off events. [2025-03-13 21:26:22,921 INFO L125 PetriNetUnfolderBase]: For 17475/17475 co-relation queries the response was YES. [2025-03-13 21:26:22,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22027 conditions, 8447 events. 4276/8447 cut-off events. For 17475/17475 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 55561 event pairs, 992 based on Foata normal form. 119/8559 useless extension candidates. Maximal degree in co-relation 21187. Up to 1397 conditions per place. [2025-03-13 21:26:22,974 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 225 selfloop transitions, 139 changer transitions 36/405 dead transitions. [2025-03-13 21:26:22,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 405 transitions, 3233 flow [2025-03-13 21:26:22,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-03-13 21:26:22,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-03-13 21:26:22,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 455 transitions. [2025-03-13 21:26:22,976 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5352941176470588 [2025-03-13 21:26:22,976 INFO L175 Difference]: Start difference. First operand has 102 places, 114 transitions, 988 flow. Second operand 25 states and 455 transitions. [2025-03-13 21:26:22,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 405 transitions, 3233 flow [2025-03-13 21:26:23,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 405 transitions, 3143 flow, removed 29 selfloop flow, removed 2 redundant places. [2025-03-13 21:26:23,022 INFO L231 Difference]: Finished difference. Result has 131 places, 188 transitions, 2066 flow [2025-03-13 21:26:23,023 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2066, PETRI_PLACES=131, PETRI_TRANSITIONS=188} [2025-03-13 21:26:23,023 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 99 predicate places. [2025-03-13 21:26:23,023 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 188 transitions, 2066 flow [2025-03-13 21:26:23,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.058823529411764) internal successors, (188), 17 states have internal predecessors, (188), 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) [2025-03-13 21:26:23,024 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:26:23,024 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2025-03-13 21:26:23,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-13 21:26:23,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:26:23,225 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:26:23,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:26:23,225 INFO L85 PathProgramCache]: Analyzing trace with hash 738917660, now seen corresponding path program 2 times [2025-03-13 21:26:23,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:26:23,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424590494] [2025-03-13 21:26:23,225 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:26:23,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:26:23,250 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-13 21:26:23,283 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-13 21:26:23,283 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:26:23,283 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:23,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:26:23,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424590494] [2025-03-13 21:26:23,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424590494] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:26:23,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32406349] [2025-03-13 21:26:23,823 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:26:23,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:26:23,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:26:23,825 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:26:23,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-13 21:26:23,904 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-13 21:26:24,068 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-13 21:26:24,068 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:26:24,068 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:24,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 1800 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-13 21:26:24,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:26:24,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-13 21:26:24,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-13 21:26:24,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-13 21:26:24,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-13 21:26:24,275 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:24,275 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:26:24,392 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:24,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32406349] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:26:24,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:26:24,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 25 [2025-03-13 21:26:24,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876133693] [2025-03-13 21:26:24,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:26:24,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-13 21:26:24,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:26:24,393 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-13 21:26:24,393 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=436, Unknown=0, NotChecked=0, Total=650 [2025-03-13 21:26:24,395 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-13 21:26:24,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 188 transitions, 2066 flow. Second operand has 26 states, 26 states have (on average 9.923076923076923) internal successors, (258), 26 states have internal predecessors, (258), 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) [2025-03-13 21:26:24,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:26:24,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-13 21:26:24,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:26:27,363 INFO L124 PetriNetUnfolderBase]: 11738/22854 cut-off events. [2025-03-13 21:26:27,364 INFO L125 PetriNetUnfolderBase]: For 72119/72119 co-relation queries the response was YES. [2025-03-13 21:26:27,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65887 conditions, 22854 events. 11738/22854 cut-off events. For 72119/72119 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 172009 event pairs, 1878 based on Foata normal form. 270/23117 useless extension candidates. Maximal degree in co-relation 63929. Up to 3792 conditions per place. [2025-03-13 21:26:27,650 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 602 selfloop transitions, 434 changer transitions 28/1069 dead transitions. [2025-03-13 21:26:27,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 1069 transitions, 10142 flow [2025-03-13 21:26:27,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2025-03-13 21:26:27,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2025-03-13 21:26:27,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 1143 transitions. [2025-03-13 21:26:27,654 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5252757352941176 [2025-03-13 21:26:27,654 INFO L175 Difference]: Start difference. First operand has 131 places, 188 transitions, 2066 flow. Second operand 64 states and 1143 transitions. [2025-03-13 21:26:27,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 1069 transitions, 10142 flow [2025-03-13 21:26:28,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 1069 transitions, 9824 flow, removed 155 selfloop flow, removed 3 redundant places. [2025-03-13 21:26:28,112 INFO L231 Difference]: Finished difference. Result has 209 places, 514 transitions, 6921 flow [2025-03-13 21:26:28,113 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2018, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=6921, PETRI_PLACES=209, PETRI_TRANSITIONS=514} [2025-03-13 21:26:28,115 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 177 predicate places. [2025-03-13 21:26:28,115 INFO L471 AbstractCegarLoop]: Abstraction has has 209 places, 514 transitions, 6921 flow [2025-03-13 21:26:28,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.923076923076923) internal successors, (258), 26 states have internal predecessors, (258), 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) [2025-03-13 21:26:28,115 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:26:28,115 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:26:28,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-13 21:26:28,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:26:28,320 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:26:28,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:26:28,320 INFO L85 PathProgramCache]: Analyzing trace with hash -991293339, now seen corresponding path program 2 times [2025-03-13 21:26:28,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:26:28,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166277402] [2025-03-13 21:26:28,321 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:26:28,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:26:28,348 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-13 21:26:28,428 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-13 21:26:28,428 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:26:28,428 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:30,621 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:30,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:26:30,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166277402] [2025-03-13 21:26:30,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166277402] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:26:30,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25233395] [2025-03-13 21:26:30,622 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:26:30,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:26:30,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:26:30,625 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:26:30,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-13 21:26:30,756 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-13 21:26:31,044 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-13 21:26:31,044 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:26:31,044 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:31,052 INFO L256 TraceCheckSpWp]: Trace formula consists of 1841 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-13 21:26:31,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:26:31,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-13 21:26:31,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 50 [2025-03-13 21:26:31,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 72 [2025-03-13 21:26:31,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 15 [2025-03-13 21:26:31,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 48 [2025-03-13 21:26:32,090 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:26:32,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 131 treesize of output 63 [2025-03-13 21:26:32,123 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:32,123 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:26:32,794 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:32,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25233395] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:26:32,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:26:32,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2025-03-13 21:26:32,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742311275] [2025-03-13 21:26:32,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:26:32,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-13 21:26:32,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:26:32,797 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-13 21:26:32,798 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2025-03-13 21:26:32,799 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-13 21:26:32,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 514 transitions, 6921 flow. Second operand has 25 states, 25 states have (on average 10.96) internal successors, (274), 25 states have internal predecessors, (274), 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) [2025-03-13 21:26:32,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:26:32,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-13 21:26:32,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:26:40,095 INFO L124 PetriNetUnfolderBase]: 22623/44022 cut-off events. [2025-03-13 21:26:40,096 INFO L125 PetriNetUnfolderBase]: For 233767/233767 co-relation queries the response was YES. [2025-03-13 21:26:40,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136346 conditions, 44022 events. 22623/44022 cut-off events. For 233767/233767 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 358851 event pairs, 3270 based on Foata normal form. 803/44818 useless extension candidates. Maximal degree in co-relation 134179. Up to 7392 conditions per place. [2025-03-13 21:26:40,470 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 500 selfloop transitions, 805 changer transitions 38/1348 dead transitions. [2025-03-13 21:26:40,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 1348 transitions, 18009 flow [2025-03-13 21:26:40,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-03-13 21:26:40,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2025-03-13 21:26:40,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 677 transitions. [2025-03-13 21:26:40,473 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5105580693815988 [2025-03-13 21:26:40,473 INFO L175 Difference]: Start difference. First operand has 209 places, 514 transitions, 6921 flow. Second operand 39 states and 677 transitions. [2025-03-13 21:26:40,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 1348 transitions, 18009 flow [2025-03-13 21:26:42,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 1348 transitions, 16617 flow, removed 696 selfloop flow, removed 0 redundant places. [2025-03-13 21:26:42,703 INFO L231 Difference]: Finished difference. Result has 273 places, 972 transitions, 14867 flow [2025-03-13 21:26:42,703 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=6337, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=372, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=14867, PETRI_PLACES=273, PETRI_TRANSITIONS=972} [2025-03-13 21:26:42,704 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 241 predicate places. [2025-03-13 21:26:42,704 INFO L471 AbstractCegarLoop]: Abstraction has has 273 places, 972 transitions, 14867 flow [2025-03-13 21:26:42,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 10.96) internal successors, (274), 25 states have internal predecessors, (274), 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) [2025-03-13 21:26:42,704 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:26:42,704 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:26:42,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-13 21:26:42,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:26:42,905 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:26:42,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:26:42,906 INFO L85 PathProgramCache]: Analyzing trace with hash 616857468, now seen corresponding path program 1 times [2025-03-13 21:26:42,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:26:42,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125305956] [2025-03-13 21:26:42,906 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:26:42,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:26:42,933 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-13 21:26:42,951 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-13 21:26:42,951 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:26:42,951 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:26:43,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:26:43,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125305956] [2025-03-13 21:26:43,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125305956] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:26:43,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664558984] [2025-03-13 21:26:43,452 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:26:43,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:26:43,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:26:43,454 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:26:43,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-13 21:26:43,535 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-03-13 21:26:43,676 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-03-13 21:26:43,677 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:26:43,677 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:26:43,682 INFO L256 TraceCheckSpWp]: Trace formula consists of 1868 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-13 21:26:43,688 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:26:43,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-13 21:26:43,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-13 21:26:43,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-13 21:26:44,002 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:26:44,002 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:26:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:26:44,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664558984] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:26:44,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:26:44,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 20 [2025-03-13 21:26:44,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460200304] [2025-03-13 21:26:44,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:26:44,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-13 21:26:44,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:26:44,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-13 21:26:44,096 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2025-03-13 21:26:44,099 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-13 21:26:44,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 972 transitions, 14867 flow. Second operand has 20 states, 20 states have (on average 12.65) internal successors, (253), 20 states have internal predecessors, (253), 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) [2025-03-13 21:26:44,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:26:44,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-13 21:26:44,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:26:56,544 INFO L124 PetriNetUnfolderBase]: 29072/56666 cut-off events. [2025-03-13 21:26:56,544 INFO L125 PetriNetUnfolderBase]: For 406317/406317 co-relation queries the response was YES. [2025-03-13 21:26:57,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187577 conditions, 56666 events. 29072/56666 cut-off events. For 406317/406317 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 474220 event pairs, 3170 based on Foata normal form. 213/56848 useless extension candidates. Maximal degree in co-relation 185423. Up to 9507 conditions per place. [2025-03-13 21:26:57,633 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 473 selfloop transitions, 1101 changer transitions 18/1597 dead transitions. [2025-03-13 21:26:57,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 1597 transitions, 24119 flow [2025-03-13 21:26:57,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-03-13 21:26:57,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2025-03-13 21:26:57,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 652 transitions. [2025-03-13 21:26:57,635 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5326797385620915 [2025-03-13 21:26:57,635 INFO L175 Difference]: Start difference. First operand has 273 places, 972 transitions, 14867 flow. Second operand 36 states and 652 transitions. [2025-03-13 21:26:57,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 1597 transitions, 24119 flow [2025-03-13 21:27:02,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 1597 transitions, 23184 flow, removed 448 selfloop flow, removed 5 redundant places. [2025-03-13 21:27:02,779 INFO L231 Difference]: Finished difference. Result has 317 places, 1279 transitions, 21889 flow [2025-03-13 21:27:02,780 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=14225, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=971, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=811, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=21889, PETRI_PLACES=317, PETRI_TRANSITIONS=1279} [2025-03-13 21:27:02,780 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 285 predicate places. [2025-03-13 21:27:02,780 INFO L471 AbstractCegarLoop]: Abstraction has has 317 places, 1279 transitions, 21889 flow [2025-03-13 21:27:02,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 12.65) internal successors, (253), 20 states have internal predecessors, (253), 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) [2025-03-13 21:27:02,780 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:27:02,780 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:27:02,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-13 21:27:02,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:27:02,981 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-13 21:27:02,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:27:02,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1697695330, now seen corresponding path program 3 times [2025-03-13 21:27:02,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:27:02,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173615176] [2025-03-13 21:27:02,982 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:27:02,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:27:03,010 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 56 statements into 4 equivalence classes. [2025-03-13 21:27:03,836 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 56 of 56 statements. [2025-03-13 21:27:03,836 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-13 21:27:03,836 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:27:05,590 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-13 21:27:05,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:27:05,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173615176] [2025-03-13 21:27:05,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173615176] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:27:05,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258291921] [2025-03-13 21:27:05,591 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:27:05,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:27:05,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:27:05,593 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:27:05,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-13 21:27:05,677 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 56 statements into 4 equivalence classes. [2025-03-13 21:27:05,927 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 56 of 56 statements. [2025-03-13 21:27:05,927 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-13 21:27:05,927 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:27:05,934 INFO L256 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-03-13 21:27:05,940 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:27:05,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-13 21:27:06,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 51 [2025-03-13 21:27:06,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 77 [2025-03-13 21:27:06,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 27 [2025-03-13 21:27:06,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 93 [2025-03-13 21:27:06,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 115 [2025-03-13 21:27:06,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 88 [2025-03-13 21:27:06,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 177 [2025-03-13 21:27:06,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 181 [2025-03-13 21:27:06,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 150 [2025-03-13 21:27:11,184 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-13 21:27:11,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 455 treesize of output 231 [2025-03-13 21:27:11,224 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:27:11,224 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:27:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:27:11,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258291921] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:27:11,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:27:11,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2025-03-13 21:27:11,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711695086] [2025-03-13 21:27:11,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:27:11,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-13 21:27:11,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:27:11,730 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-13 21:27:11,731 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2025-03-13 21:27:11,735 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-13 21:27:11,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 1279 transitions, 21889 flow. Second operand has 32 states, 32 states have (on average 11.03125) internal successors, (353), 32 states have internal predecessors, (353), 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) [2025-03-13 21:27:11,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:27:11,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-13 21:27:11,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand