./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 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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_1.5.800.v20200727-1323.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 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 10:08:04,259 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 10:08:04,354 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-10 10:08:04,360 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 10:08:04,361 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 10:08:04,407 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 10:08:04,408 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 10:08:04,408 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 10:08:04,409 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 10:08:04,409 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 10:08:04,409 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 10:08:04,409 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 10:08:04,410 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 10:08:04,410 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 10:08:04,415 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 10:08:04,416 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 10:08:04,416 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-10 10:08:04,416 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 10:08:04,416 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 10:08:04,417 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 10:08:04,417 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 10:08:04,420 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-10 10:08:04,421 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 10:08:04,424 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-10 10:08:04,424 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 10:08:04,424 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 10:08:04,425 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-10 10:08:04,425 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 10:08:04,425 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 10:08:04,425 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 10:08:04,425 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 10:08:04,426 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 10:08:04,426 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:08:04,426 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 10:08:04,426 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 10:08:04,426 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-10 10:08:04,427 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 10:08:04,427 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 10:08:04,427 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 10:08:04,433 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 10:08:04,434 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 10:08:04,434 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 10:08:04,434 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 [2024-11-10 10:08:04,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 10:08:04,876 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 10:08:04,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 10:08:04,880 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 10:08:04,881 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 10:08:04,882 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/stack_longest-2.i [2024-11-10 10:08:06,321 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 10:08:06,529 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 10:08:06,529 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack_longest-2.i [2024-11-10 10:08:06,544 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48c88e499/0add6acc97f9484ba214de48a848c6ce/FLAG575843881 [2024-11-10 10:08:06,555 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48c88e499/0add6acc97f9484ba214de48a848c6ce [2024-11-10 10:08:06,558 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 10:08:06,559 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 10:08:06,560 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 10:08:06,560 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 10:08:06,564 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 10:08:06,564 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:08:06" (1/1) ... [2024-11-10 10:08:06,565 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@386898de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:08:06, skipping insertion in model container [2024-11-10 10:08:06,565 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:08:06" (1/1) ... [2024-11-10 10:08:06,602 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 10:08:07,025 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] [2024-11-10 10:08:07,047 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:08:07,099 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 10:08:07,149 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] [2024-11-10 10:08:07,160 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:08:07,245 INFO L204 MainTranslator]: Completed translation [2024-11-10 10:08:07,245 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:08:07 WrapperNode [2024-11-10 10:08:07,245 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 10:08:07,246 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 10:08:07,247 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 10:08:07,247 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 10:08:07,252 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:08:07" (1/1) ... [2024-11-10 10:08:07,279 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:08:07" (1/1) ... [2024-11-10 10:08:07,322 INFO L138 Inliner]: procedures = 277, calls = 830, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 943 [2024-11-10 10:08:07,322 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 10:08:07,323 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 10:08:07,323 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 10:08:07,323 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 10:08:07,331 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:08:07" (1/1) ... [2024-11-10 10:08:07,331 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:08:07" (1/1) ... [2024-11-10 10:08:07,339 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:08:07" (1/1) ... [2024-11-10 10:08:07,379 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]. [2024-11-10 10:08:07,381 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:08:07" (1/1) ... [2024-11-10 10:08:07,381 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:08:07" (1/1) ... [2024-11-10 10:08:07,414 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:08:07" (1/1) ... [2024-11-10 10:08:07,417 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:08:07" (1/1) ... [2024-11-10 10:08:07,419 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:08:07" (1/1) ... [2024-11-10 10:08:07,426 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:08:07" (1/1) ... [2024-11-10 10:08:07,434 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 10:08:07,438 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 10:08:07,438 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 10:08:07,438 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 10:08:07,439 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:08:07" (1/1) ... [2024-11-10 10:08:07,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:08:07,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:08:07,487 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) [2024-11-10 10:08:07,500 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 [2024-11-10 10:08:07,538 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-11-10 10:08:07,538 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-11-10 10:08:07,539 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-11-10 10:08:07,539 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-11-10 10:08:07,539 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-10 10:08:07,539 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 10:08:07,539 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 10:08:07,539 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-10 10:08:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 10:08:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 10:08:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-10 10:08:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-10 10:08:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 10:08:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 10:08:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 10:08:07,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-10 10:08:07,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 10:08:07,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 10:08:07,544 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 10:08:07,675 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 10:08:07,676 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 10:08:08,557 INFO L1247 $ProcedureCfgBuilder]: dead code at ProgramPoint L985-1: pop_#res#1 := 0; [2024-11-10 10:08:08,558 INFO L1247 $ProcedureCfgBuilder]: dead code at ProgramPoint L983: havoc pop_#t~mem37#1; [2024-11-10 10:08:08,558 INFO L1247 $ProcedureCfgBuilder]: dead code at ProgramPoint L983-1: havoc pop_#t~ret36#1; [2024-11-10 10:08:08,559 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 10:08:08,560 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 10:08:22,009 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 10:08:22,011 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 10:08:22,012 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:08:22 BoogieIcfgContainer [2024-11-10 10:08:22,012 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 10:08:22,013 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 10:08:22,013 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 10:08:22,016 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 10:08:22,016 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 10:08:06" (1/3) ... [2024-11-10 10:08:22,018 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@118062ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:08:22, skipping insertion in model container [2024-11-10 10:08:22,018 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:08:07" (2/3) ... [2024-11-10 10:08:22,019 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@118062ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:08:22, skipping insertion in model container [2024-11-10 10:08:22,019 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:08:22" (3/3) ... [2024-11-10 10:08:22,020 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2024-11-10 10:08:22,034 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 10:08:22,034 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-10 10:08:22,034 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 10:08:22,083 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-10 10:08:22,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 40 transitions, 94 flow [2024-11-10 10:08:22,146 INFO L124 PetriNetUnfolderBase]: 7/38 cut-off events. [2024-11-10 10:08:22,146 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 10:08:22,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 38 events. 7/38 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 80 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 35. Up to 3 conditions per place. [2024-11-10 10:08:22,149 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 40 transitions, 94 flow [2024-11-10 10:08:22,151 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 36 transitions, 81 flow [2024-11-10 10:08:22,157 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:08:22,161 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;@4ade456a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:08:22,162 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-11-10 10:08:22,187 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:08:22,187 INFO L124 PetriNetUnfolderBase]: 3/25 cut-off events. [2024-11-10 10:08:22,188 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-10 10:08:22,188 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:08:22,188 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:08:22,189 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:08:22,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:08:22,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1769437690, now seen corresponding path program 1 times [2024-11-10 10:08:22,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:08:22,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590364179] [2024-11-10 10:08:22,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:08:22,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:08:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:08:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:22,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:08:22,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590364179] [2024-11-10 10:08:22,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590364179] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:08:22,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:08:22,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:08:22,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428883694] [2024-11-10 10:08:22,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:08:22,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:08:22,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:08:22,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:08:22,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 10:08:22,795 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-10 10:08:22,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 81 flow. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:08:22,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:08:22,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-10 10:08:22,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:08:23,192 INFO L124 PetriNetUnfolderBase]: 307/633 cut-off events. [2024-11-10 10:08:23,192 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-11-10 10:08:23,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1189 conditions, 633 events. 307/633 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3183 event pairs, 53 based on Foata normal form. 100/661 useless extension candidates. Maximal degree in co-relation 1112. Up to 358 conditions per place. [2024-11-10 10:08:23,198 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 41 selfloop transitions, 3 changer transitions 2/56 dead transitions. [2024-11-10 10:08:23,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 56 transitions, 222 flow [2024-11-10 10:08:23,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 10:08:23,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 10:08:23,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-11-10 10:08:23,208 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-11-10 10:08:23,209 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 81 flow. Second operand 4 states and 104 transitions. [2024-11-10 10:08:23,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 56 transitions, 222 flow [2024-11-10 10:08:23,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 56 transitions, 213 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 10:08:23,214 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 90 flow [2024-11-10 10:08:23,215 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=90, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2024-11-10 10:08:23,218 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2024-11-10 10:08:23,218 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 90 flow [2024-11-10 10:08:23,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:08:23,222 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:08:23,222 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:08:23,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 10:08:23,223 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:08:23,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:08:23,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1461273121, now seen corresponding path program 1 times [2024-11-10 10:08:23,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:08:23,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933667933] [2024-11-10 10:08:23,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:08:23,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:08:23,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:08:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:23,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:08:23,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933667933] [2024-11-10 10:08:23,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933667933] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:08:23,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323674726] [2024-11-10 10:08:23,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:08:23,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:08:23,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:08:23,845 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) [2024-11-10 10:08:23,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 10:08:24,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:08:24,147 INFO L255 TraceCheckSpWp]: Trace formula consists of 1721 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-10 10:08:24,152 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:08:24,201 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 [2024-11-10 10:08:24,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:24,261 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:08:24,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:24,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323674726] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:08:24,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:08:24,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-10 10:08:24,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044519854] [2024-11-10 10:08:24,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:08:24,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-10 10:08:24,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:08:24,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-10 10:08:24,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-10 10:08:24,341 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-10 10:08:24,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 90 flow. Second operand has 10 states, 10 states have (on average 13.9) internal successors, (139), 10 states have internal predecessors, (139), 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) [2024-11-10 10:08:24,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:08:24,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-10 10:08:24,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:08:24,821 INFO L124 PetriNetUnfolderBase]: 1257/2601 cut-off events. [2024-11-10 10:08:24,821 INFO L125 PetriNetUnfolderBase]: For 299/301 co-relation queries the response was YES. [2024-11-10 10:08:24,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5189 conditions, 2601 events. 1257/2601 cut-off events. For 299/301 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 16131 event pairs, 153 based on Foata normal form. 49/2409 useless extension candidates. Maximal degree in co-relation 4592. Up to 365 conditions per place. [2024-11-10 10:08:24,835 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 163 selfloop transitions, 32 changer transitions 4/208 dead transitions. [2024-11-10 10:08:24,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 208 transitions, 908 flow [2024-11-10 10:08:24,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-10 10:08:24,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-10 10:08:24,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 373 transitions. [2024-11-10 10:08:24,839 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6216666666666667 [2024-11-10 10:08:24,839 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 90 flow. Second operand 15 states and 373 transitions. [2024-11-10 10:08:24,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 208 transitions, 908 flow [2024-11-10 10:08:24,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 208 transitions, 904 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:08:24,843 INFO L231 Difference]: Finished difference. Result has 58 places, 70 transitions, 337 flow [2024-11-10 10:08:24,843 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=337, PETRI_PLACES=58, PETRI_TRANSITIONS=70} [2024-11-10 10:08:24,844 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 22 predicate places. [2024-11-10 10:08:24,844 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 70 transitions, 337 flow [2024-11-10 10:08:24,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.9) internal successors, (139), 10 states have internal predecessors, (139), 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) [2024-11-10 10:08:24,844 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:08:24,844 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:08:24,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 10:08:25,045 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 [2024-11-10 10:08:25,046 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:08:25,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:08:25,047 INFO L85 PathProgramCache]: Analyzing trace with hash -300586547, now seen corresponding path program 1 times [2024-11-10 10:08:25,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:08:25,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434343814] [2024-11-10 10:08:25,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:08:25,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:08:25,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:08:25,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:25,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:08:25,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434343814] [2024-11-10 10:08:25,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434343814] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:08:25,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:08:25,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:08:25,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162108323] [2024-11-10 10:08:25,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:08:25,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:08:25,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:08:25,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:08:25,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:08:25,495 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-10 10:08:25,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 70 transitions, 337 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2024-11-10 10:08:25,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:08:25,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-10 10:08:25,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:08:25,703 INFO L124 PetriNetUnfolderBase]: 669/1516 cut-off events. [2024-11-10 10:08:25,704 INFO L125 PetriNetUnfolderBase]: For 603/603 co-relation queries the response was YES. [2024-11-10 10:08:25,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3227 conditions, 1516 events. 669/1516 cut-off events. For 603/603 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 8988 event pairs, 231 based on Foata normal form. 66/1460 useless extension candidates. Maximal degree in co-relation 3079. Up to 634 conditions per place. [2024-11-10 10:08:25,711 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 43 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2024-11-10 10:08:25,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 63 transitions, 347 flow [2024-11-10 10:08:25,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:08:25,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:08:25,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-11-10 10:08:25,713 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-10 10:08:25,713 INFO L175 Difference]: Start difference. First operand has 58 places, 70 transitions, 337 flow. Second operand 3 states and 70 transitions. [2024-11-10 10:08:25,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 63 transitions, 347 flow [2024-11-10 10:08:25,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 63 transitions, 315 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-11-10 10:08:25,719 INFO L231 Difference]: Finished difference. Result has 54 places, 53 transitions, 206 flow [2024-11-10 10:08:25,720 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=54, PETRI_TRANSITIONS=53} [2024-11-10 10:08:25,720 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 18 predicate places. [2024-11-10 10:08:25,720 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 53 transitions, 206 flow [2024-11-10 10:08:25,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2024-11-10 10:08:25,721 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:08:25,721 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:08:25,721 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-10 10:08:25,721 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:08:25,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:08:25,721 INFO L85 PathProgramCache]: Analyzing trace with hash -92203712, now seen corresponding path program 1 times [2024-11-10 10:08:25,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:08:25,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109660058] [2024-11-10 10:08:25,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:08:25,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:08:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:08:27,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:27,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:08:27,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109660058] [2024-11-10 10:08:27,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109660058] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:08:27,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:08:27,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 10:08:27,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613155770] [2024-11-10 10:08:27,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:08:27,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 10:08:27,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:08:27,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 10:08:27,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 10:08:27,272 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-10 10:08:27,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 53 transitions, 206 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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) [2024-11-10 10:08:27,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:08:27,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-10 10:08:27,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:08:27,853 INFO L124 PetriNetUnfolderBase]: 840/1909 cut-off events. [2024-11-10 10:08:27,857 INFO L125 PetriNetUnfolderBase]: For 575/575 co-relation queries the response was YES. [2024-11-10 10:08:27,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4093 conditions, 1909 events. 840/1909 cut-off events. For 575/575 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 11910 event pairs, 260 based on Foata normal form. 0/1777 useless extension candidates. Maximal degree in co-relation 3705. Up to 971 conditions per place. [2024-11-10 10:08:27,879 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 61 selfloop transitions, 7 changer transitions 4/88 dead transitions. [2024-11-10 10:08:27,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 88 transitions, 459 flow [2024-11-10 10:08:27,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 10:08:27,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 10:08:27,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-11-10 10:08:27,885 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.585 [2024-11-10 10:08:27,885 INFO L175 Difference]: Start difference. First operand has 54 places, 53 transitions, 206 flow. Second operand 5 states and 117 transitions. [2024-11-10 10:08:27,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 88 transitions, 459 flow [2024-11-10 10:08:27,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 88 transitions, 448 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:08:27,896 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 262 flow [2024-11-10 10:08:27,896 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=262, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-11-10 10:08:27,897 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 24 predicate places. [2024-11-10 10:08:27,897 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 262 flow [2024-11-10 10:08:27,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 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) [2024-11-10 10:08:27,898 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:08:27,898 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:08:27,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 10:08:27,903 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:08:27,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:08:27,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1478230931, now seen corresponding path program 1 times [2024-11-10 10:08:27,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:08:27,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025045339] [2024-11-10 10:08:27,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:08:27,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:08:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:08:29,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:29,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:08:29,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025045339] [2024-11-10 10:08:29,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025045339] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:08:29,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069644006] [2024-11-10 10:08:29,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:08:29,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:08:29,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:08:29,307 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) [2024-11-10 10:08:29,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 10:08:29,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:08:29,582 INFO L255 TraceCheckSpWp]: Trace formula consists of 1767 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-10 10:08:29,586 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:08:29,614 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 [2024-11-10 10:08:29,684 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 [2024-11-10 10:08:29,775 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 [2024-11-10 10:08:29,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:29,828 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:08:30,072 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 9 treesize of output 1 [2024-11-10 10:08:30,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:30,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069644006] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:08:30,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:08:30,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-11-10 10:08:30,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340816411] [2024-11-10 10:08:30,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:08:30,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 10:08:30,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:08:30,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 10:08:30,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-10 10:08:30,121 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-10 10:08:30,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 262 flow. Second operand has 14 states, 14 states have (on average 14.857142857142858) internal successors, (208), 14 states have internal predecessors, (208), 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) [2024-11-10 10:08:30,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:08:30,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-10 10:08:30,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:08:31,714 INFO L124 PetriNetUnfolderBase]: 2548/5593 cut-off events. [2024-11-10 10:08:31,715 INFO L125 PetriNetUnfolderBase]: For 2150/2150 co-relation queries the response was YES. [2024-11-10 10:08:31,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11905 conditions, 5593 events. 2548/5593 cut-off events. For 2150/2150 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 40836 event pairs, 382 based on Foata normal form. 0/5201 useless extension candidates. Maximal degree in co-relation 10757. Up to 821 conditions per place. [2024-11-10 10:08:31,748 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 287 selfloop transitions, 79 changer transitions 38/413 dead transitions. [2024-11-10 10:08:31,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 413 transitions, 2200 flow [2024-11-10 10:08:31,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-10 10:08:31,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-11-10 10:08:31,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 757 transitions. [2024-11-10 10:08:31,751 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5566176470588236 [2024-11-10 10:08:31,751 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 262 flow. Second operand 34 states and 757 transitions. [2024-11-10 10:08:31,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 413 transitions, 2200 flow [2024-11-10 10:08:31,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 413 transitions, 2191 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-10 10:08:31,771 INFO L231 Difference]: Finished difference. Result has 100 places, 120 transitions, 760 flow [2024-11-10 10:08:31,772 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=760, PETRI_PLACES=100, PETRI_TRANSITIONS=120} [2024-11-10 10:08:31,773 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 64 predicate places. [2024-11-10 10:08:31,773 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 120 transitions, 760 flow [2024-11-10 10:08:31,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.857142857142858) internal successors, (208), 14 states have internal predecessors, (208), 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) [2024-11-10 10:08:31,774 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:08:31,774 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:08:31,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-10 10:08:31,974 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 [2024-11-10 10:08:31,975 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:08:31,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:08:31,976 INFO L85 PathProgramCache]: Analyzing trace with hash -2112537554, now seen corresponding path program 1 times [2024-11-10 10:08:31,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:08:31,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147420535] [2024-11-10 10:08:31,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:08:31,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:08:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:08:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:08:32,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:08:32,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147420535] [2024-11-10 10:08:32,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147420535] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:08:32,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957780846] [2024-11-10 10:08:32,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:08:32,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:08:32,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:08:32,653 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) [2024-11-10 10:08:32,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 10:08:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:08:32,913 INFO L255 TraceCheckSpWp]: Trace formula consists of 1795 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 10:08:32,917 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:08:32,937 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 [2024-11-10 10:08:32,977 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 [2024-11-10 10:08:33,132 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:33,133 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:08:33,171 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:08:33,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957780846] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:08:33,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:08:33,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 12 [2024-11-10 10:08:33,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556394619] [2024-11-10 10:08:33,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:08:33,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-10 10:08:33,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:08:33,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-10 10:08:33,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-11-10 10:08:33,176 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-10 10:08:33,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 120 transitions, 760 flow. Second operand has 12 states, 12 states have (on average 16.416666666666668) internal successors, (197), 12 states have internal predecessors, (197), 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) [2024-11-10 10:08:33,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:08:33,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-10 10:08:33,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:08:34,379 INFO L124 PetriNetUnfolderBase]: 3657/7999 cut-off events. [2024-11-10 10:08:34,380 INFO L125 PetriNetUnfolderBase]: For 6864/6864 co-relation queries the response was YES. [2024-11-10 10:08:34,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17974 conditions, 7999 events. 3657/7999 cut-off events. For 6864/6864 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 62153 event pairs, 520 based on Foata normal form. 78/7589 useless extension candidates. Maximal degree in co-relation 17225. Up to 1181 conditions per place. [2024-11-10 10:08:34,427 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 192 selfloop transitions, 117 changer transitions 8/326 dead transitions. [2024-11-10 10:08:34,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 326 transitions, 2173 flow [2024-11-10 10:08:34,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-10 10:08:34,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-10 10:08:34,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 428 transitions. [2024-11-10 10:08:34,429 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5631578947368421 [2024-11-10 10:08:34,429 INFO L175 Difference]: Start difference. First operand has 100 places, 120 transitions, 760 flow. Second operand 19 states and 428 transitions. [2024-11-10 10:08:34,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 326 transitions, 2173 flow [2024-11-10 10:08:34,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 326 transitions, 2115 flow, removed 29 selfloop flow, removed 0 redundant places. [2024-11-10 10:08:34,473 INFO L231 Difference]: Finished difference. Result has 123 places, 165 transitions, 1323 flow [2024-11-10 10:08:34,474 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1323, PETRI_PLACES=123, PETRI_TRANSITIONS=165} [2024-11-10 10:08:34,474 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 87 predicate places. [2024-11-10 10:08:34,474 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 165 transitions, 1323 flow [2024-11-10 10:08:34,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.416666666666668) internal successors, (197), 12 states have internal predecessors, (197), 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) [2024-11-10 10:08:34,475 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:08:34,475 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:08:34,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-10 10:08:34,680 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 [2024-11-10 10:08:34,681 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:08:34,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:08:34,681 INFO L85 PathProgramCache]: Analyzing trace with hash 14383684, now seen corresponding path program 1 times [2024-11-10 10:08:34,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:08:34,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983123992] [2024-11-10 10:08:34,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:08:34,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:08:34,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:08:36,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:36,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:08:36,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983123992] [2024-11-10 10:08:36,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983123992] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:08:36,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234892293] [2024-11-10 10:08:36,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:08:36,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:08:36,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:08:36,056 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) [2024-11-10 10:08:36,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 10:08:36,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:08:36,322 INFO L255 TraceCheckSpWp]: Trace formula consists of 1793 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-10 10:08:36,329 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:08:36,374 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 [2024-11-10 10:08:36,518 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 [2024-11-10 10:08:36,763 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 [2024-11-10 10:08:36,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:36,835 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:08:37,320 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:08:37,320 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 [2024-11-10 10:08:37,352 INFO L349 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2024-11-10 10:08:37,352 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 [2024-11-10 10:08:37,420 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:37,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234892293] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:08:37,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:08:37,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-10 10:08:37,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886020786] [2024-11-10 10:08:37,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:08:37,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-10 10:08:37,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:08:37,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-10 10:08:37,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2024-11-10 10:08:37,425 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-10 10:08:37,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 165 transitions, 1323 flow. Second operand has 17 states, 17 states have (on average 15.058823529411764) internal successors, (256), 17 states have internal predecessors, (256), 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) [2024-11-10 10:08:37,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:08:37,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-10 10:08:37,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:08:40,228 INFO L124 PetriNetUnfolderBase]: 5795/12782 cut-off events. [2024-11-10 10:08:40,229 INFO L125 PetriNetUnfolderBase]: For 15889/15895 co-relation queries the response was YES. [2024-11-10 10:08:40,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29691 conditions, 12782 events. 5795/12782 cut-off events. For 15889/15895 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 104273 event pairs, 886 based on Foata normal form. 91/12032 useless extension candidates. Maximal degree in co-relation 29087. Up to 1892 conditions per place. [2024-11-10 10:08:40,285 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 281 selfloop transitions, 191 changer transitions 54/535 dead transitions. [2024-11-10 10:08:40,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 535 transitions, 3899 flow [2024-11-10 10:08:40,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-10 10:08:40,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-11-10 10:08:40,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 745 transitions. [2024-11-10 10:08:40,288 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5477941176470589 [2024-11-10 10:08:40,288 INFO L175 Difference]: Start difference. First operand has 123 places, 165 transitions, 1323 flow. Second operand 34 states and 745 transitions. [2024-11-10 10:08:40,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 535 transitions, 3899 flow [2024-11-10 10:08:40,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 535 transitions, 3818 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-11-10 10:08:40,369 INFO L231 Difference]: Finished difference. Result has 158 places, 243 transitions, 2378 flow [2024-11-10 10:08:40,369 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1260, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2378, PETRI_PLACES=158, PETRI_TRANSITIONS=243} [2024-11-10 10:08:40,370 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 122 predicate places. [2024-11-10 10:08:40,370 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 243 transitions, 2378 flow [2024-11-10 10:08:40,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 15.058823529411764) internal successors, (256), 17 states have internal predecessors, (256), 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) [2024-11-10 10:08:40,370 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:08:40,370 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2024-11-10 10:08:40,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-10 10:08:40,571 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 [2024-11-10 10:08:40,571 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:08:40,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:08:40,572 INFO L85 PathProgramCache]: Analyzing trace with hash -443538106, now seen corresponding path program 2 times [2024-11-10 10:08:40,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:08:40,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696642780] [2024-11-10 10:08:40,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:08:40,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:08:40,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:08:41,038 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:41,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:08:41,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696642780] [2024-11-10 10:08:41,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696642780] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:08:41,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603758712] [2024-11-10 10:08:41,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:08:41,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:08:41,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:08:41,044 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) [2024-11-10 10:08:41,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 10:08:41,304 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:08:41,304 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:08:41,309 INFO L255 TraceCheckSpWp]: Trace formula consists of 1805 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-10 10:08:41,315 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:08:41,335 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 [2024-11-10 10:08:41,390 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 [2024-11-10 10:08:41,451 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 [2024-11-10 10:08:41,517 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 [2024-11-10 10:08:41,576 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:41,577 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:08:41,687 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:41,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603758712] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:08:41,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:08:41,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 23 [2024-11-10 10:08:41,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858237056] [2024-11-10 10:08:41,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:08:41,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-10 10:08:41,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:08:41,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-10 10:08:41,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2024-11-10 10:08:41,691 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-10 10:08:41,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 243 transitions, 2378 flow. Second operand has 24 states, 24 states have (on average 14.166666666666666) internal successors, (340), 24 states have internal predecessors, (340), 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) [2024-11-10 10:08:41,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:08:41,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-10 10:08:41,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:08:46,027 INFO L124 PetriNetUnfolderBase]: 13282/28908 cut-off events. [2024-11-10 10:08:46,027 INFO L125 PetriNetUnfolderBase]: For 60457/60457 co-relation queries the response was YES. [2024-11-10 10:08:46,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73244 conditions, 28908 events. 13282/28908 cut-off events. For 60457/60457 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 265606 event pairs, 2407 based on Foata normal form. 230/27432 useless extension candidates. Maximal degree in co-relation 71135. Up to 4302 conditions per place. [2024-11-10 10:08:46,198 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 571 selfloop transitions, 463 changer transitions 20/1063 dead transitions. [2024-11-10 10:08:46,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 1063 transitions, 9364 flow [2024-11-10 10:08:46,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-10 10:08:46,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2024-11-10 10:08:46,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 1314 transitions. [2024-11-10 10:08:46,202 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5475 [2024-11-10 10:08:46,202 INFO L175 Difference]: Start difference. First operand has 158 places, 243 transitions, 2378 flow. Second operand 60 states and 1314 transitions. [2024-11-10 10:08:46,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 1063 transitions, 9364 flow [2024-11-10 10:08:46,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 1063 transitions, 9131 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-11-10 10:08:46,726 INFO L231 Difference]: Finished difference. Result has 227 places, 548 transitions, 6369 flow [2024-11-10 10:08:46,726 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2299, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=6369, PETRI_PLACES=227, PETRI_TRANSITIONS=548} [2024-11-10 10:08:46,727 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 191 predicate places. [2024-11-10 10:08:46,727 INFO L471 AbstractCegarLoop]: Abstraction has has 227 places, 548 transitions, 6369 flow [2024-11-10 10:08:46,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 14.166666666666666) internal successors, (340), 24 states have internal predecessors, (340), 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) [2024-11-10 10:08:46,728 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:08:46,728 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:08:46,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-10 10:08:46,928 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 [2024-11-10 10:08:46,929 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:08:46,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:08:46,929 INFO L85 PathProgramCache]: Analyzing trace with hash 2145394802, now seen corresponding path program 2 times [2024-11-10 10:08:46,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:08:46,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322073243] [2024-11-10 10:08:46,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:08:46,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:08:47,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:08:48,874 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:48,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:08:48,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322073243] [2024-11-10 10:08:48,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322073243] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:08:48,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578110404] [2024-11-10 10:08:48,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:08:48,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:08:48,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:08:48,876 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) [2024-11-10 10:08:48,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-10 10:08:49,149 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:08:49,149 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:08:49,156 INFO L255 TraceCheckSpWp]: Trace formula consists of 1847 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-10 10:08:49,163 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:08:49,190 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 [2024-11-10 10:08:49,241 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 [2024-11-10 10:08:49,306 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 [2024-11-10 10:08:49,481 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 [2024-11-10 10:08:49,514 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:49,514 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:08:50,083 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:08:50,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578110404] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:08:50,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:08:50,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 26 [2024-11-10 10:08:50,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818879761] [2024-11-10 10:08:50,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:08:50,085 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-10 10:08:50,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:08:50,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-10 10:08:50,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2024-11-10 10:08:50,093 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-10 10:08:50,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 548 transitions, 6369 flow. Second operand has 26 states, 26 states have (on average 14.807692307692308) internal successors, (385), 26 states have internal predecessors, (385), 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) [2024-11-10 10:08:50,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:08:50,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-10 10:08:50,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:08:57,727 INFO L124 PetriNetUnfolderBase]: 19195/41628 cut-off events. [2024-11-10 10:08:57,728 INFO L125 PetriNetUnfolderBase]: For 147887/147887 co-relation queries the response was YES. [2024-11-10 10:08:58,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115275 conditions, 41628 events. 19195/41628 cut-off events. For 147887/147887 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 383235 event pairs, 3184 based on Foata normal form. 518/39494 useless extension candidates. Maximal degree in co-relation 112964. Up to 6273 conditions per place. [2024-11-10 10:08:58,160 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 397 selfloop transitions, 659 changer transitions 24/1089 dead transitions. [2024-11-10 10:08:58,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 1089 transitions, 12776 flow [2024-11-10 10:08:58,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-10 10:08:58,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-10 10:08:58,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 699 transitions. [2024-11-10 10:08:58,162 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5295454545454545 [2024-11-10 10:08:58,162 INFO L175 Difference]: Start difference. First operand has 227 places, 548 transitions, 6369 flow. Second operand 33 states and 699 transitions. [2024-11-10 10:08:58,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 1089 transitions, 12776 flow [2024-11-10 10:08:59,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 1089 transitions, 11876 flow, removed 429 selfloop flow, removed 2 redundant places. [2024-11-10 10:08:59,699 INFO L231 Difference]: Finished difference. Result has 262 places, 793 transitions, 10405 flow [2024-11-10 10:08:59,700 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4923, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=348, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=10405, PETRI_PLACES=262, PETRI_TRANSITIONS=793} [2024-11-10 10:08:59,700 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 226 predicate places. [2024-11-10 10:08:59,701 INFO L471 AbstractCegarLoop]: Abstraction has has 262 places, 793 transitions, 10405 flow [2024-11-10 10:08:59,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 14.807692307692308) internal successors, (385), 26 states have internal predecessors, (385), 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) [2024-11-10 10:08:59,701 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:08:59,701 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:08:59,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-10 10:08:59,905 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 [2024-11-10 10:08:59,907 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-10 10:08:59,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:08:59,907 INFO L85 PathProgramCache]: Analyzing trace with hash -902378386, now seen corresponding path program 1 times [2024-11-10 10:08:59,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:08:59,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892172195] [2024-11-10 10:08:59,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:08:59,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:08:59,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:09:00,749 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 11 proven. 87 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:09:00,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:09:00,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892172195] [2024-11-10 10:09:00,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892172195] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:09:00,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756601764] [2024-11-10 10:09:00,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:09:00,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:09:00,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:09:00,752 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) [2024-11-10 10:09:00,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-10 10:09:01,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:09:01,075 INFO L255 TraceCheckSpWp]: Trace formula consists of 1905 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-10 10:09:01,082 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:09:01,100 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 [2024-11-10 10:09:01,142 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 [2024-11-10 10:09:01,191 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 [2024-11-10 10:09:01,237 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 [2024-11-10 10:09:01,277 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 [2024-11-10 10:09:01,483 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:09:01,484 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:09:01,550 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 53 proven. 16 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-10 10:09:01,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756601764] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:09:01,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:09:01,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 6] total 20 [2024-11-10 10:09:01,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508713311] [2024-11-10 10:09:01,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:09:01,552 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-10 10:09:01,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:09:01,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-10 10:09:01,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2024-11-10 10:09:01,554 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-10 10:09:01,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 793 transitions, 10405 flow. Second operand has 20 states, 20 states have (on average 16.75) internal successors, (335), 20 states have internal predecessors, (335), 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) [2024-11-10 10:09:01,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:09:01,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-10 10:09:01,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:09:19,485 INFO L124 PetriNetUnfolderBase]: 34176/73654 cut-off events. [2024-11-10 10:09:19,486 INFO L125 PetriNetUnfolderBase]: For 468722/468724 co-relation queries the response was YES. [2024-11-10 10:09:20,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219885 conditions, 73654 events. 34176/73654 cut-off events. For 468722/468724 co-relation queries the response was YES. Maximal size of possible extension queue 917. Compared 714224 event pairs, 4474 based on Foata normal form. 525/70381 useless extension candidates. Maximal degree in co-relation 217634. Up to 11130 conditions per place. [2024-11-10 10:09:21,073 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 689 selfloop transitions, 1324 changer transitions 30/2052 dead transitions. [2024-11-10 10:09:21,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 2052 transitions, 25699 flow [2024-11-10 10:09:21,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-11-10 10:09:21,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2024-11-10 10:09:21,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 1402 transitions. [2024-11-10 10:09:21,076 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5392307692307692 [2024-11-10 10:09:21,076 INFO L175 Difference]: Start difference. First operand has 262 places, 793 transitions, 10405 flow. Second operand 65 states and 1402 transitions. [2024-11-10 10:09:21,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 2052 transitions, 25699 flow