./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 e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/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-?-e2fb8be-m [2025-03-08 17:12:34,664 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 17:12:34,715 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 17:12:34,722 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 17:12:34,723 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 17:12:34,745 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 17:12:34,745 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 17:12:34,745 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 17:12:34,746 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 17:12:34,746 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 17:12:34,746 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 17:12:34,746 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 17:12:34,747 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 17:12:34,747 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 17:12:34,747 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 17:12:34,747 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 17:12:34,747 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 17:12:34,747 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 17:12:34,747 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 17:12:34,747 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 17:12:34,747 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 17:12:34,748 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 17:12:34,748 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 17:12:34,748 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 17:12:34,748 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 17:12:34,748 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 17:12:34,748 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 17:12:34,748 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 17:12:34,748 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 17:12:34,748 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 17:12:34,748 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 17:12:34,748 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 17:12:34,748 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:12:34,749 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 17:12:34,749 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 17:12:34,749 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 17:12:34,749 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 17:12:34,749 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 17:12:34,749 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 17:12:34,749 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 17:12:34,749 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 17:12:34,749 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 17:12:34,749 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 17:12:34,749 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 [2025-03-08 17:12:34,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 17:12:35,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 17:12:35,006 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 17:12:35,007 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 17:12:35,007 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 17:12:35,008 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/stack_longest-2.i [2025-03-08 17:12:36,105 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/508cbebb2/3902fefc4f9441eb9a32ac0f092c1631/FLAG7694b2c08 [2025-03-08 17:12:36,408 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 17:12:36,408 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack_longest-2.i [2025-03-08 17:12:36,425 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/508cbebb2/3902fefc4f9441eb9a32ac0f092c1631/FLAG7694b2c08 [2025-03-08 17:12:36,441 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/508cbebb2/3902fefc4f9441eb9a32ac0f092c1631 [2025-03-08 17:12:36,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 17:12:36,444 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 17:12:36,446 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 17:12:36,446 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 17:12:36,449 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 17:12:36,450 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:12:36" (1/1) ... [2025-03-08 17:12:36,450 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dd6f09f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:36, skipping insertion in model container [2025-03-08 17:12:36,451 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:12:36" (1/1) ... [2025-03-08 17:12:36,488 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 17:12:36,703 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] [2025-03-08 17:12:36,728 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:12:36,762 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 17:12:36,805 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] [2025-03-08 17:12:36,814 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:12:36,906 INFO L204 MainTranslator]: Completed translation [2025-03-08 17:12:36,907 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:36 WrapperNode [2025-03-08 17:12:36,907 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 17:12:36,908 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 17:12:36,908 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 17:12:36,908 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 17:12:36,913 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:36" (1/1) ... [2025-03-08 17:12:36,936 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:36" (1/1) ... [2025-03-08 17:12:37,003 INFO L138 Inliner]: procedures = 277, calls = 830, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 939 [2025-03-08 17:12:37,004 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 17:12:37,004 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 17:12:37,004 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 17:12:37,004 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 17:12:37,014 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:36" (1/1) ... [2025-03-08 17:12:37,015 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:36" (1/1) ... [2025-03-08 17:12:37,025 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:36" (1/1) ... [2025-03-08 17:12:37,060 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]. [2025-03-08 17:12:37,061 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:36" (1/1) ... [2025-03-08 17:12:37,061 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:36" (1/1) ... [2025-03-08 17:12:37,091 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:36" (1/1) ... [2025-03-08 17:12:37,093 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:36" (1/1) ... [2025-03-08 17:12:37,095 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:36" (1/1) ... [2025-03-08 17:12:37,097 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:36" (1/1) ... [2025-03-08 17:12:37,107 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 17:12:37,108 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 17:12:37,108 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 17:12:37,108 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 17:12:37,109 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:36" (1/1) ... [2025-03-08 17:12:37,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:12:37,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:12:37,133 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 17:12:37,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 17:12:37,153 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-03-08 17:12:37,153 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-03-08 17:12:37,153 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-03-08 17:12:37,153 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-03-08 17:12:37,153 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-03-08 17:12:37,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 17:12:37,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 17:12:37,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-08 17:12:37,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 17:12:37,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 17:12:37,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-08 17:12:37,154 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-03-08 17:12:37,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 17:12:37,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 17:12:37,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 17:12:37,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-08 17:12:37,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 17:12:37,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 17:12:37,155 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-08 17:12:37,261 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 17:12:37,262 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 17:12:38,251 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L985-1: pop_#res#1 := 0; [2025-03-08 17:12:38,251 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L983: havoc pop_#t~mem37#1; [2025-03-08 17:12:38,252 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L983-1: havoc pop_#t~ret36#1; [2025-03-08 17:12:38,252 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-08 17:12:38,253 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 17:12:47,477 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 17:12:47,478 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 17:12:47,478 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:12:47 BoogieIcfgContainer [2025-03-08 17:12:47,478 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 17:12:47,480 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 17:12:47,480 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 17:12:47,483 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 17:12:47,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:12:36" (1/3) ... [2025-03-08 17:12:47,484 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10832aaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:12:47, skipping insertion in model container [2025-03-08 17:12:47,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:12:36" (2/3) ... [2025-03-08 17:12:47,484 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10832aaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:12:47, skipping insertion in model container [2025-03-08 17:12:47,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:12:47" (3/3) ... [2025-03-08 17:12:47,485 INFO L128 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2025-03-08 17:12:47,497 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 17:12:47,499 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. [2025-03-08 17:12:47,499 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-08 17:12:47,555 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-08 17:12:47,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 34 transitions, 82 flow [2025-03-08 17:12:47,628 INFO L124 PetriNetUnfolderBase]: 5/32 cut-off events. [2025-03-08 17:12:47,630 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-08 17:12:47,633 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. [2025-03-08 17:12:47,634 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 34 transitions, 82 flow [2025-03-08 17:12:47,639 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 30 transitions, 69 flow [2025-03-08 17:12:47,647 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:12:47,656 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;@cf3fc2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:12:47,659 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2025-03-08 17:12:47,687 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:12:47,687 INFO L124 PetriNetUnfolderBase]: 1/19 cut-off events. [2025-03-08 17:12:47,687 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-08 17:12:47,687 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:12:47,688 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:12:47,688 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:12:47,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:12:47,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1317435824, now seen corresponding path program 1 times [2025-03-08 17:12:47,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:12:47,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480109307] [2025-03-08 17:12:47,699 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:47,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:12:47,801 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-08 17:12:47,961 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-08 17:12:47,961 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:47,961 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:48,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:48,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:12:48,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480109307] [2025-03-08 17:12:48,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480109307] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:12:48,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:12:48,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 17:12:48,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994144934] [2025-03-08 17:12:48,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:12:48,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:12:48,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:12:48,450 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:12:48,451 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:12:48,459 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-03-08 17:12:48,462 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) [2025-03-08 17:12:48,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:12:48,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-03-08 17:12:48,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:12:48,659 INFO L124 PetriNetUnfolderBase]: 307/564 cut-off events. [2025-03-08 17:12:48,660 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2025-03-08 17:12:48,664 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. [2025-03-08 17:12:48,668 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 41 selfloop transitions, 3 changer transitions 2/52 dead transitions. [2025-03-08 17:12:48,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 52 transitions, 214 flow [2025-03-08 17:12:48,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:12:48,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:12:48,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2025-03-08 17:12:48,677 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6102941176470589 [2025-03-08 17:12:48,678 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 69 flow. Second operand 4 states and 83 transitions. [2025-03-08 17:12:48,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 52 transitions, 214 flow [2025-03-08 17:12:48,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 52 transitions, 205 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-08 17:12:48,686 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 82 flow [2025-03-08 17:12:48,688 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} [2025-03-08 17:12:48,690 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2025-03-08 17:12:48,691 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 82 flow [2025-03-08 17:12:48,692 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) [2025-03-08 17:12:48,692 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:12:48,692 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:12:48,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 17:12:48,692 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:12:48,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:12:48,693 INFO L85 PathProgramCache]: Analyzing trace with hash 780898027, now seen corresponding path program 1 times [2025-03-08 17:12:48,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:12:48,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618025860] [2025-03-08 17:12:48,694 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:48,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:12:48,723 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-08 17:12:48,756 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 17:12:48,757 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:48,757 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:49,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:49,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:12:49,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618025860] [2025-03-08 17:12:49,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618025860] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:12:49,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039973458] [2025-03-08 17:12:49,252 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:49,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:12:49,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:12:49,254 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:12:49,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 17:12:49,351 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-08 17:12:49,566 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-08 17:12:49,567 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:49,567 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:49,573 INFO L256 TraceCheckSpWp]: Trace formula consists of 1719 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-08 17:12:49,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:12:49,633 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 [2025-03-08 17:12:49,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:49,700 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:12:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:49,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039973458] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:12:49,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:12:49,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2025-03-08 17:12:49,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357452657] [2025-03-08 17:12:49,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:12:49,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-08 17:12:49,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:12:49,775 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-08 17:12:49,775 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-03-08 17:12:49,778 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-08 17:12:49,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 82 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:12:49,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:12:49,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-08 17:12:49,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:12:50,321 INFO L124 PetriNetUnfolderBase]: 1257/2332 cut-off events. [2025-03-08 17:12:50,322 INFO L125 PetriNetUnfolderBase]: For 297/299 co-relation queries the response was YES. [2025-03-08 17:12:50,328 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. [2025-03-08 17:12:50,338 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 163 selfloop transitions, 32 changer transitions 4/204 dead transitions. [2025-03-08 17:12:50,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 204 transitions, 900 flow [2025-03-08 17:12:50,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-08 17:12:50,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-08 17:12:50,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 313 transitions. [2025-03-08 17:12:50,343 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6137254901960785 [2025-03-08 17:12:50,344 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 82 flow. Second operand 15 states and 313 transitions. [2025-03-08 17:12:50,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 204 transitions, 900 flow [2025-03-08 17:12:50,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 204 transitions, 896 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-08 17:12:50,349 INFO L231 Difference]: Finished difference. Result has 54 places, 66 transitions, 329 flow [2025-03-08 17:12:50,350 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} [2025-03-08 17:12:50,350 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 22 predicate places. [2025-03-08 17:12:50,351 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 66 transitions, 329 flow [2025-03-08 17:12:50,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:12:50,351 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:12:50,351 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:12:50,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-08 17:12:50,551 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 [2025-03-08 17:12:50,552 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:12:50,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:12:50,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1405512292, now seen corresponding path program 1 times [2025-03-08 17:12:50,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:12:50,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173606838] [2025-03-08 17:12:50,552 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:50,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:12:50,588 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-08 17:12:50,615 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-08 17:12:50,616 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:50,616 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:50,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:50,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:12:50,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173606838] [2025-03-08 17:12:50,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173606838] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:12:50,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:12:50,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 17:12:50,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121823630] [2025-03-08 17:12:50,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:12:50,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:12:50,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:12:50,849 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:12:50,849 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:12:50,849 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-03-08 17:12:50,849 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) [2025-03-08 17:12:50,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:12:50,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-03-08 17:12:50,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:12:51,018 INFO L124 PetriNetUnfolderBase]: 669/1351 cut-off events. [2025-03-08 17:12:51,019 INFO L125 PetriNetUnfolderBase]: For 601/601 co-relation queries the response was YES. [2025-03-08 17:12:51,022 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 6852 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. [2025-03-08 17:12:51,026 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 43 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2025-03-08 17:12:51,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 59 transitions, 339 flow [2025-03-08 17:12:51,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:12:51,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:12:51,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2025-03-08 17:12:51,027 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5686274509803921 [2025-03-08 17:12:51,027 INFO L175 Difference]: Start difference. First operand has 54 places, 66 transitions, 329 flow. Second operand 3 states and 58 transitions. [2025-03-08 17:12:51,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 59 transitions, 339 flow [2025-03-08 17:12:51,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 307 flow, removed 16 selfloop flow, removed 3 redundant places. [2025-03-08 17:12:51,035 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 198 flow [2025-03-08 17:12:51,035 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} [2025-03-08 17:12:51,036 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 18 predicate places. [2025-03-08 17:12:51,036 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 198 flow [2025-03-08 17:12:51,036 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) [2025-03-08 17:12:51,036 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:12:51,037 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:12:51,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 17:12:51,037 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:12:51,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:12:51,038 INFO L85 PathProgramCache]: Analyzing trace with hash 461484055, now seen corresponding path program 1 times [2025-03-08 17:12:51,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:12:51,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586703290] [2025-03-08 17:12:51,038 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:51,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:12:51,065 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-08 17:12:51,124 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-08 17:12:51,125 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:51,125 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:52,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:52,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:12:52,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586703290] [2025-03-08 17:12:52,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586703290] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:12:52,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:12:52,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:12:52,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390051877] [2025-03-08 17:12:52,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:12:52,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:12:52,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:12:52,240 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:12:52,240 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-08 17:12:52,243 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-03-08 17:12:52,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:12:52,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:12:52,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-03-08 17:12:52,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:12:52,495 INFO L124 PetriNetUnfolderBase]: 840/1690 cut-off events. [2025-03-08 17:12:52,495 INFO L125 PetriNetUnfolderBase]: For 581/581 co-relation queries the response was YES. [2025-03-08 17:12:52,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3871 conditions, 1690 events. 840/1690 cut-off events. For 581/581 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8849 event pairs, 260 based on Foata normal form. 0/1665 useless extension candidates. Maximal degree in co-relation 3491. Up to 971 conditions per place. [2025-03-08 17:12:52,504 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 61 selfloop transitions, 7 changer transitions 4/84 dead transitions. [2025-03-08 17:12:52,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 84 transitions, 451 flow [2025-03-08 17:12:52,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:12:52,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:12:52,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2025-03-08 17:12:52,505 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5705882352941176 [2025-03-08 17:12:52,505 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 198 flow. Second operand 5 states and 97 transitions. [2025-03-08 17:12:52,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 84 transitions, 451 flow [2025-03-08 17:12:52,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 84 transitions, 440 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-08 17:12:52,509 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 254 flow [2025-03-08 17:12:52,509 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=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2025-03-08 17:12:52,510 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 24 predicate places. [2025-03-08 17:12:52,510 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 254 flow [2025-03-08 17:12:52,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:12:52,510 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:12:52,510 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:12:52,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 17:12:52,511 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:12:52,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:12:52,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1338312732, now seen corresponding path program 1 times [2025-03-08 17:12:52,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:12:52,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370527502] [2025-03-08 17:12:52,511 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:52,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:12:52,538 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 17:12:52,572 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:12:52,572 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:52,572 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:53,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:53,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:12:53,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370527502] [2025-03-08 17:12:53,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370527502] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:12:53,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662384627] [2025-03-08 17:12:53,388 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:53,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:12:53,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:12:53,391 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:12:53,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 17:12:53,463 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-08 17:12:53,646 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-08 17:12:53,647 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:53,647 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:53,654 INFO L256 TraceCheckSpWp]: Trace formula consists of 1764 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-08 17:12:53,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:12:53,689 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 [2025-03-08 17:12:53,751 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 [2025-03-08 17:12:53,820 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 [2025-03-08 17:12:53,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:53,870 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:12:54,160 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 [2025-03-08 17:12:54,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:54,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662384627] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:12:54,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:12:54,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2025-03-08 17:12:54,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370099236] [2025-03-08 17:12:54,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:12:54,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 17:12:54,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:12:54,203 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 17:12:54,203 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2025-03-08 17:12:54,206 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-08 17:12:54,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 254 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) [2025-03-08 17:12:54,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:12:54,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-08 17:12:54,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:12:55,542 INFO L124 PetriNetUnfolderBase]: 2548/5013 cut-off events. [2025-03-08 17:12:55,543 INFO L125 PetriNetUnfolderBase]: For 2221/2221 co-relation queries the response was YES. [2025-03-08 17:12:55,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11325 conditions, 5013 events. 2548/5013 cut-off events. For 2221/2221 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 30583 event pairs, 382 based on Foata normal form. 0/4908 useless extension candidates. Maximal degree in co-relation 10240. Up to 821 conditions per place. [2025-03-08 17:12:55,569 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 287 selfloop transitions, 79 changer transitions 38/409 dead transitions. [2025-03-08 17:12:55,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 409 transitions, 2192 flow [2025-03-08 17:12:55,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-03-08 17:12:55,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2025-03-08 17:12:55,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 621 transitions. [2025-03-08 17:12:55,572 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.53719723183391 [2025-03-08 17:12:55,572 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 254 flow. Second operand 34 states and 621 transitions. [2025-03-08 17:12:55,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 409 transitions, 2192 flow [2025-03-08 17:12:55,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 409 transitions, 2183 flow, removed 3 selfloop flow, removed 1 redundant places. [2025-03-08 17:12:55,585 INFO L231 Difference]: Finished difference. Result has 96 places, 116 transitions, 752 flow [2025-03-08 17:12:55,585 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=752, PETRI_PLACES=96, PETRI_TRANSITIONS=116} [2025-03-08 17:12:55,585 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 64 predicate places. [2025-03-08 17:12:55,585 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 116 transitions, 752 flow [2025-03-08 17:12:55,586 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) [2025-03-08 17:12:55,586 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:12:55,586 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] [2025-03-08 17:12:55,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-08 17:12:55,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:12:55,786 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:12:55,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:12:55,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1470961805, now seen corresponding path program 1 times [2025-03-08 17:12:55,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:12:55,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837882684] [2025-03-08 17:12:55,787 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:55,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:12:55,806 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-08 17:12:55,819 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 17:12:55,820 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:55,820 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:56,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:56,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:12:56,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837882684] [2025-03-08 17:12:56,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837882684] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:12:56,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530938792] [2025-03-08 17:12:56,111 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:56,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:12:56,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:12:56,113 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:12:56,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 17:12:56,178 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-08 17:12:56,332 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 17:12:56,332 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:56,332 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:56,339 INFO L256 TraceCheckSpWp]: Trace formula consists of 1791 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-08 17:12:56,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:12:56,360 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 [2025-03-08 17:12:56,398 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 [2025-03-08 17:12:56,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:56,521 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:12:56,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:56,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530938792] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-08 17:12:56,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-08 17:12:56,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 6] total 12 [2025-03-08 17:12:56,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639673330] [2025-03-08 17:12:56,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:12:56,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:12:56,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:12:56,564 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:12:56,565 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2025-03-08 17:12:56,565 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-08 17:12:56,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 116 transitions, 752 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) [2025-03-08 17:12:56,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:12:56,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-08 17:12:56,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:12:57,027 INFO L124 PetriNetUnfolderBase]: 2955/5869 cut-off events. [2025-03-08 17:12:57,027 INFO L125 PetriNetUnfolderBase]: For 5390/5390 co-relation queries the response was YES. [2025-03-08 17:12:57,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13983 conditions, 5869 events. 2955/5869 cut-off events. For 5390/5390 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 37488 event pairs, 840 based on Foata normal form. 24/5851 useless extension candidates. Maximal degree in co-relation 13582. Up to 1930 conditions per place. [2025-03-08 17:12:57,063 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 87 selfloop transitions, 73 changer transitions 2/167 dead transitions. [2025-03-08 17:12:57,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 167 transitions, 1285 flow [2025-03-08 17:12:57,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:12:57,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:12:57,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2025-03-08 17:12:57,066 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5490196078431373 [2025-03-08 17:12:57,066 INFO L175 Difference]: Start difference. First operand has 96 places, 116 transitions, 752 flow. Second operand 6 states and 112 transitions. [2025-03-08 17:12:57,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 167 transitions, 1285 flow [2025-03-08 17:12:57,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 167 transitions, 1231 flow, removed 27 selfloop flow, removed 0 redundant places. [2025-03-08 17:12:57,085 INFO L231 Difference]: Finished difference. Result has 103 places, 130 transitions, 1013 flow [2025-03-08 17:12:57,086 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1013, PETRI_PLACES=103, PETRI_TRANSITIONS=130} [2025-03-08 17:12:57,087 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 71 predicate places. [2025-03-08 17:12:57,087 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 130 transitions, 1013 flow [2025-03-08 17:12:57,087 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) [2025-03-08 17:12:57,088 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:12:57,088 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] [2025-03-08 17:12:57,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-08 17:12:57,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:12:57,289 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:12:57,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:12:57,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1363535238, now seen corresponding path program 1 times [2025-03-08 17:12:57,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:12:57,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604303256] [2025-03-08 17:12:57,290 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:57,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:12:57,312 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-08 17:12:57,369 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 17:12:57,369 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:57,369 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:58,432 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:58,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:12:58,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604303256] [2025-03-08 17:12:58,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604303256] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:12:58,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420999842] [2025-03-08 17:12:58,432 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:12:58,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:12:58,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:12:58,435 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:12:58,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 17:12:58,508 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-08 17:12:58,685 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-08 17:12:58,685 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:12:58,685 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:12:58,691 INFO L256 TraceCheckSpWp]: Trace formula consists of 1789 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-08 17:12:58,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:12:58,727 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 [2025-03-08 17:12:58,795 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 50 treesize of output 19 [2025-03-08 17:12:58,923 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 56 treesize of output 32 [2025-03-08 17:12:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:58,951 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:12:59,316 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-08 17:12:59,316 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 18 treesize of output 14 [2025-03-08 17:12:59,343 INFO L349 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2025-03-08 17:12:59,343 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 78 treesize of output 65 [2025-03-08 17:12:59,403 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:12:59,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420999842] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:12:59,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:12:59,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2025-03-08 17:12:59,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394151087] [2025-03-08 17:12:59,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:12:59,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 17:12:59,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:12:59,405 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 17:12:59,406 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2025-03-08 17:12:59,408 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-08 17:12:59,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 130 transitions, 1013 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) [2025-03-08 17:12:59,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:12:59,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-08 17:12:59,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:13:01,366 INFO L124 PetriNetUnfolderBase]: 5209/10323 cut-off events. [2025-03-08 17:13:01,367 INFO L125 PetriNetUnfolderBase]: For 15780/15780 co-relation queries the response was YES. [2025-03-08 17:13:01,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25821 conditions, 10323 events. 5209/10323 cut-off events. For 15780/15780 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 69478 event pairs, 1211 based on Foata normal form. 105/10386 useless extension candidates. Maximal degree in co-relation 25020. Up to 1715 conditions per place. [2025-03-08 17:13:01,427 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 262 selfloop transitions, 165 changer transitions 46/478 dead transitions. [2025-03-08 17:13:01,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 478 transitions, 3518 flow [2025-03-08 17:13:01,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-03-08 17:13:01,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2025-03-08 17:13:01,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 541 transitions. [2025-03-08 17:13:01,429 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5303921568627451 [2025-03-08 17:13:01,429 INFO L175 Difference]: Start difference. First operand has 103 places, 130 transitions, 1013 flow. Second operand 30 states and 541 transitions. [2025-03-08 17:13:01,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 478 transitions, 3518 flow [2025-03-08 17:13:01,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 478 transitions, 3417 flow, removed 31 selfloop flow, removed 1 redundant places. [2025-03-08 17:13:01,469 INFO L231 Difference]: Finished difference. Result has 138 places, 215 transitions, 2150 flow [2025-03-08 17:13:01,470 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=892, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2150, PETRI_PLACES=138, PETRI_TRANSITIONS=215} [2025-03-08 17:13:01,471 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 106 predicate places. [2025-03-08 17:13:01,471 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 215 transitions, 2150 flow [2025-03-08 17:13:01,472 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) [2025-03-08 17:13:01,472 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:13:01,472 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2025-03-08 17:13:01,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-08 17:13:01,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:13:01,672 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:13:01,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:13:01,673 INFO L85 PathProgramCache]: Analyzing trace with hash 738917660, now seen corresponding path program 2 times [2025-03-08 17:13:01,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:13:01,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716374961] [2025-03-08 17:13:01,673 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:13:01,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:13:01,692 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-08 17:13:01,715 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 17:13:01,716 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:13:01,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:02,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:13:02,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716374961] [2025-03-08 17:13:02,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716374961] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:13:02,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746213313] [2025-03-08 17:13:02,057 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:13:02,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:13:02,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:13:02,059 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:13:02,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 17:13:02,137 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-08 17:13:02,304 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 17:13:02,304 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:13:02,304 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:02,310 INFO L256 TraceCheckSpWp]: Trace formula consists of 1800 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-08 17:13:02,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:13:02,329 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 [2025-03-08 17:13:02,378 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 [2025-03-08 17:13:02,417 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 [2025-03-08 17:13:02,462 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 [2025-03-08 17:13:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:02,502 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:13:02,585 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:02,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746213313] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:13:02,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:13:02,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 22 [2025-03-08 17:13:02,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856565508] [2025-03-08 17:13:02,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:13:02,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 17:13:02,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:13:02,586 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 17:13:02,586 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2025-03-08 17:13:02,587 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-08 17:13:02,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 215 transitions, 2150 flow. Second operand has 23 states, 23 states have (on average 10.130434782608695) internal successors, (233), 23 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:13:02,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:13:02,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-08 17:13:02,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:13:06,009 INFO L124 PetriNetUnfolderBase]: 11634/22754 cut-off events. [2025-03-08 17:13:06,009 INFO L125 PetriNetUnfolderBase]: For 61080/61080 co-relation queries the response was YES. [2025-03-08 17:13:06,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63131 conditions, 22754 events. 11634/22754 cut-off events. For 61080/61080 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 172551 event pairs, 2273 based on Foata normal form. 296/23043 useless extension candidates. Maximal degree in co-relation 61171. Up to 3768 conditions per place. [2025-03-08 17:13:06,280 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 562 selfloop transitions, 414 changer transitions 20/1001 dead transitions. [2025-03-08 17:13:06,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 1001 transitions, 9036 flow [2025-03-08 17:13:06,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2025-03-08 17:13:06,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2025-03-08 17:13:06,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 1043 transitions. [2025-03-08 17:13:06,283 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5289046653144016 [2025-03-08 17:13:06,283 INFO L175 Difference]: Start difference. First operand has 138 places, 215 transitions, 2150 flow. Second operand 58 states and 1043 transitions. [2025-03-08 17:13:06,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 1001 transitions, 9036 flow [2025-03-08 17:13:06,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 1001 transitions, 8764 flow, removed 131 selfloop flow, removed 3 redundant places. [2025-03-08 17:13:06,642 INFO L231 Difference]: Finished difference. Result has 207 places, 499 transitions, 6074 flow [2025-03-08 17:13:06,642 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2100, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=6074, PETRI_PLACES=207, PETRI_TRANSITIONS=499} [2025-03-08 17:13:06,643 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 175 predicate places. [2025-03-08 17:13:06,643 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 499 transitions, 6074 flow [2025-03-08 17:13:06,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.130434782608695) internal successors, (233), 23 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:13:06,643 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:13:06,643 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] [2025-03-08 17:13:06,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 17:13:06,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:13:06,844 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:13:06,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:13:06,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1323272759, now seen corresponding path program 2 times [2025-03-08 17:13:06,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:13:06,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697601524] [2025-03-08 17:13:06,844 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:13:06,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:13:06,870 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-08 17:13:07,061 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-08 17:13:07,062 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:13:07,062 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:09,254 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:09,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:13:09,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697601524] [2025-03-08 17:13:09,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697601524] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:13:09,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060803365] [2025-03-08 17:13:09,254 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:13:09,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:13:09,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:13:09,260 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:13:09,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 17:13:09,357 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-08 17:13:09,609 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-08 17:13:09,610 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:13:09,610 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:09,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 1841 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-08 17:13:09,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:13:09,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 17:13:09,729 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 34 treesize of output 14 [2025-03-08 17:13:09,792 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 34 treesize of output 14 [2025-03-08 17:13:09,956 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 56 treesize of output 32 [2025-03-08 17:13:09,999 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:10,000 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:13:10,579 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:10,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060803365] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:13:10,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:13:10,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 26 [2025-03-08 17:13:10,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552414010] [2025-03-08 17:13:10,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:13:10,580 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-08 17:13:10,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:13:10,582 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-08 17:13:10,582 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2025-03-08 17:13:10,583 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-08 17:13:10,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 499 transitions, 6074 flow. Second operand has 26 states, 26 states have (on average 10.807692307692308) internal successors, (281), 26 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:13:10,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:13:10,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-08 17:13:10,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:13:15,907 INFO L124 PetriNetUnfolderBase]: 15802/30878 cut-off events. [2025-03-08 17:13:15,907 INFO L125 PetriNetUnfolderBase]: For 140758/140758 co-relation queries the response was YES. [2025-03-08 17:13:16,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93156 conditions, 30878 events. 15802/30878 cut-off events. For 140758/140758 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 244070 event pairs, 2914 based on Foata normal form. 504/31375 useless extension candidates. Maximal degree in co-relation 90994. Up to 5175 conditions per place. [2025-03-08 17:13:16,151 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 394 selfloop transitions, 563 changer transitions 28/990 dead transitions. [2025-03-08 17:13:16,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 990 transitions, 11842 flow [2025-03-08 17:13:16,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-03-08 17:13:16,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2025-03-08 17:13:16,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 600 transitions. [2025-03-08 17:13:16,154 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5042016806722689 [2025-03-08 17:13:16,154 INFO L175 Difference]: Start difference. First operand has 207 places, 499 transitions, 6074 flow. Second operand 35 states and 600 transitions. [2025-03-08 17:13:16,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 990 transitions, 11842 flow [2025-03-08 17:13:17,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 990 transitions, 10897 flow, removed 441 selfloop flow, removed 3 redundant places. [2025-03-08 17:13:17,028 INFO L231 Difference]: Finished difference. Result has 246 places, 688 transitions, 9373 flow [2025-03-08 17:13:17,029 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=5052, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=342, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=9373, PETRI_PLACES=246, PETRI_TRANSITIONS=688} [2025-03-08 17:13:17,029 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 214 predicate places. [2025-03-08 17:13:17,029 INFO L471 AbstractCegarLoop]: Abstraction has has 246 places, 688 transitions, 9373 flow [2025-03-08 17:13:17,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 10.807692307692308) internal successors, (281), 26 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:13:17,030 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:13:17,030 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:13:17,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-08 17:13:17,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:13:17,230 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:13:17,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:13:17,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1455211480, now seen corresponding path program 1 times [2025-03-08 17:13:17,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:13:17,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9919375] [2025-03-08 17:13:17,231 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:13:17,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:13:17,253 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-03-08 17:13:17,267 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-03-08 17:13:17,268 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:13:17,268 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:17,730 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 7 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:13:17,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:13:17,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9919375] [2025-03-08 17:13:17,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9919375] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:13:17,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981193979] [2025-03-08 17:13:17,730 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:13:17,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:13:17,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:13:17,732 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:13:17,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 17:13:17,819 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 54 statements into 1 equivalence classes. [2025-03-08 17:13:17,951 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 54 of 54 statements. [2025-03-08 17:13:17,951 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:13:17,951 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:17,955 INFO L256 TraceCheckSpWp]: Trace formula consists of 1897 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-08 17:13:17,964 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:13:17,978 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 [2025-03-08 17:13:18,007 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 [2025-03-08 17:13:18,041 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 [2025-03-08 17:13:18,072 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 [2025-03-08 17:13:18,103 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 [2025-03-08 17:13:18,275 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:18,275 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:13:18,329 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 34 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-03-08 17:13:18,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981193979] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:13:18,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:13:18,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 6] total 20 [2025-03-08 17:13:18,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361217662] [2025-03-08 17:13:18,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:13:18,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-08 17:13:18,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:13:18,330 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-08 17:13:18,330 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2025-03-08 17:13:18,331 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-08 17:13:18,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 688 transitions, 9373 flow. Second operand has 20 states, 20 states have (on average 12.75) internal successors, (255), 20 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:13:18,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:13:18,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-08 17:13:18,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:13:31,655 INFO L124 PetriNetUnfolderBase]: 36609/71379 cut-off events. [2025-03-08 17:13:31,655 INFO L125 PetriNetUnfolderBase]: For 544010/544010 co-relation queries the response was YES. [2025-03-08 17:13:32,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235658 conditions, 71379 events. 36609/71379 cut-off events. For 544010/544010 co-relation queries the response was YES. Maximal size of possible extension queue 747. Compared 600619 event pairs, 4677 based on Foata normal form. 708/72068 useless extension candidates. Maximal degree in co-relation 233526. Up to 11925 conditions per place. [2025-03-08 17:13:32,877 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 681 selfloop transitions, 1498 changer transitions 30/2214 dead transitions. [2025-03-08 17:13:32,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 2214 transitions, 29409 flow [2025-03-08 17:13:32,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2025-03-08 17:13:32,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2025-03-08 17:13:32,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 1142 transitions. [2025-03-08 17:13:32,879 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5167420814479639 [2025-03-08 17:13:32,880 INFO L175 Difference]: Start difference. First operand has 246 places, 688 transitions, 9373 flow. Second operand 65 states and 1142 transitions. [2025-03-08 17:13:32,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 2214 transitions, 29409 flow [2025-03-08 17:13:42,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 2214 transitions, 27079 flow, removed 945 selfloop flow, removed 4 redundant places. [2025-03-08 17:13:42,260 INFO L231 Difference]: Finished difference. Result has 319 places, 1641 transitions, 24185 flow [2025-03-08 17:13:42,260 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=8681, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=590, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=24185, PETRI_PLACES=319, PETRI_TRANSITIONS=1641} [2025-03-08 17:13:42,261 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 287 predicate places. [2025-03-08 17:13:42,261 INFO L471 AbstractCegarLoop]: Abstraction has has 319 places, 1641 transitions, 24185 flow [2025-03-08 17:13:42,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 12.75) internal successors, (255), 20 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:13:42,261 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:13:42,261 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] [2025-03-08 17:13:42,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-08 17:13:42,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:13:42,462 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-08 17:13:42,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:13:42,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1951356356, now seen corresponding path program 3 times [2025-03-08 17:13:42,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:13:42,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475817264] [2025-03-08 17:13:42,463 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:13:42,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:13:42,491 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 56 statements into 4 equivalence classes. [2025-03-08 17:13:43,215 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 56 of 56 statements. [2025-03-08 17:13:43,215 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-08 17:13:43,215 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:44,679 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 35 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:44,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:13:44,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475817264] [2025-03-08 17:13:44,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475817264] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:13:44,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524305386] [2025-03-08 17:13:44,679 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:13:44,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:13:44,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:13:44,681 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 17:13:44,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 17:13:44,773 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 56 statements into 4 equivalence classes. [2025-03-08 17:13:45,136 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 56 of 56 statements. [2025-03-08 17:13:45,137 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-08 17:13:45,137 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:13:45,144 INFO L256 TraceCheckSpWp]: Trace formula consists of 1893 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-08 17:13:45,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:13:45,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-08 17:13:45,200 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 34 treesize of output 14 [2025-03-08 17:13:45,236 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 34 treesize of output 14 [2025-03-08 17:13:45,278 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 34 treesize of output 14 [2025-03-08 17:13:45,438 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 56 treesize of output 32 [2025-03-08 17:13:45,463 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:45,463 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:13:46,123 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 6 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:13:46,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524305386] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:13:46,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:13:46,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2025-03-08 17:13:46,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142927652] [2025-03-08 17:13:46,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:13:46,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-08 17:13:46,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:13:46,124 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-08 17:13:46,125 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2025-03-08 17:13:46,126 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-08 17:13:46,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 1641 transitions, 24185 flow. Second operand has 31 states, 31 states have (on average 11.161290322580646) internal successors, (346), 31 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:13:46,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:13:46,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-08 17:13:46,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand