./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/stack-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/stack-1.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 a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 06:19:15,139 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 06:19:15,199 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-17 06:19:15,202 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 06:19:15,203 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 06:19:15,222 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 06:19:15,223 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 06:19:15,223 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 06:19:15,224 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 06:19:15,224 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 06:19:15,224 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 06:19:15,225 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 06:19:15,225 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 06:19:15,225 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 06:19:15,225 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 06:19:15,225 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 06:19:15,226 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 06:19:15,226 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 06:19:15,226 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 06:19:15,226 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 06:19:15,226 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 06:19:15,226 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 06:19:15,226 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 06:19:15,226 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 06:19:15,226 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 06:19:15,226 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 06:19:15,226 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 06:19:15,227 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 06:19:15,227 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 06:19:15,227 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 06:19:15,227 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 06:19:15,227 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 06:19:15,227 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:19:15,228 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 06:19:15,228 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 06:19:15,228 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 06:19:15,228 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 06:19:15,228 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 06:19:15,228 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 06:19:15,228 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 06:19:15,228 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 06:19:15,228 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 06:19:15,228 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 06:19:15,228 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 [2025-03-17 06:19:15,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 06:19:15,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 06:19:15,472 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 06:19:15,473 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 06:19:15,474 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 06:19:15,475 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/stack-1.i [2025-03-17 06:19:16,622 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8cbc7cad/338cd2f8609a44d7a77685fef53245ad/FLAGff087b68c [2025-03-17 06:19:16,915 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 06:19:16,917 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack-1.i [2025-03-17 06:19:16,932 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8cbc7cad/338cd2f8609a44d7a77685fef53245ad/FLAGff087b68c [2025-03-17 06:19:17,188 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8cbc7cad/338cd2f8609a44d7a77685fef53245ad [2025-03-17 06:19:17,192 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 06:19:17,193 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 06:19:17,194 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 06:19:17,194 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 06:19:17,197 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 06:19:17,198 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:19:17" (1/1) ... [2025-03-17 06:19:17,198 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d98c7f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:17, skipping insertion in model container [2025-03-17 06:19:17,198 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:19:17" (1/1) ... [2025-03-17 06:19:17,227 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 06:19:17,563 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-1.i[41520,41533] [2025-03-17 06:19:17,583 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:19:17,595 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 06:19:17,632 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-1.i[41520,41533] [2025-03-17 06:19:17,641 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:19:17,682 INFO L204 MainTranslator]: Completed translation [2025-03-17 06:19:17,683 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:17 WrapperNode [2025-03-17 06:19:17,683 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 06:19:17,684 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 06:19:17,684 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 06:19:17,684 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 06:19:17,689 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:17" (1/1) ... [2025-03-17 06:19:17,708 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:17" (1/1) ... [2025-03-17 06:19:17,729 INFO L138 Inliner]: procedures = 277, calls = 35, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 144 [2025-03-17 06:19:17,731 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 06:19:17,731 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 06:19:17,731 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 06:19:17,732 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 06:19:17,738 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:17" (1/1) ... [2025-03-17 06:19:17,738 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:17" (1/1) ... [2025-03-17 06:19:17,740 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:17" (1/1) ... [2025-03-17 06:19:17,764 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 5, 7]. 50 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 5]. The 1 writes are split as follows [0, 0, 1]. [2025-03-17 06:19:17,765 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:17" (1/1) ... [2025-03-17 06:19:17,765 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:17" (1/1) ... [2025-03-17 06:19:17,774 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:17" (1/1) ... [2025-03-17 06:19:17,777 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:17" (1/1) ... [2025-03-17 06:19:17,778 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:17" (1/1) ... [2025-03-17 06:19:17,779 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:17" (1/1) ... [2025-03-17 06:19:17,780 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 06:19:17,781 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 06:19:17,781 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 06:19:17,781 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 06:19:17,782 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:17" (1/1) ... [2025-03-17 06:19:17,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:19:17,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:19:17,809 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-17 06:19:17,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-17 06:19:17,828 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-03-17 06:19:17,828 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-03-17 06:19:17,828 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-03-17 06:19:17,828 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-03-17 06:19:17,828 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-03-17 06:19:17,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 06:19:17,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 06:19:17,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-17 06:19:17,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 06:19:17,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 06:19:17,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-17 06:19:17,829 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-03-17 06:19:17,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 06:19:17,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 06:19:17,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 06:19:17,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-17 06:19:17,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 06:19:17,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 06:19:17,830 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 06:19:17,928 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 06:19:17,930 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 06:19:18,137 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L986-1: pop_#res#1 := 0; [2025-03-17 06:19:18,137 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L984: havoc pop_#t~mem37#1; [2025-03-17 06:19:18,138 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L984-1: havoc pop_#t~ret36#1; [2025-03-17 06:19:18,138 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 06:19:18,138 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 06:19:18,280 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 06:19:18,280 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 06:19:18,280 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:19:18 BoogieIcfgContainer [2025-03-17 06:19:18,280 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 06:19:18,283 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 06:19:18,283 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 06:19:18,286 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 06:19:18,286 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 06:19:17" (1/3) ... [2025-03-17 06:19:18,287 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44d1cc7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:19:18, skipping insertion in model container [2025-03-17 06:19:18,287 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:19:17" (2/3) ... [2025-03-17 06:19:18,287 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44d1cc7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:19:18, skipping insertion in model container [2025-03-17 06:19:18,287 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:19:18" (3/3) ... [2025-03-17 06:19:18,288 INFO L128 eAbstractionObserver]: Analyzing ICFG stack-1.i [2025-03-17 06:19:18,298 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 06:19:18,300 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG stack-1.i that has 3 procedures, 30 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2025-03-17 06:19:18,301 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 06:19:18,359 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-17 06:19:18,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 34 transitions, 82 flow [2025-03-17 06:19:18,417 INFO L124 PetriNetUnfolderBase]: 5/32 cut-off events. [2025-03-17 06:19:18,421 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 06:19:18,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 32 events. 5/32 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 29. Up to 3 conditions per place. [2025-03-17 06:19:18,424 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 34 transitions, 82 flow [2025-03-17 06:19:18,429 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 30 transitions, 69 flow [2025-03-17 06:19:18,438 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 06:19:18,447 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;@5127ee1e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 06:19:18,447 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2025-03-17 06:19:18,469 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 06:19:18,469 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2025-03-17 06:19:18,469 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-17 06:19:18,469 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:18,470 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:18,470 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-17 06:19:18,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:18,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1216581928, now seen corresponding path program 1 times [2025-03-17 06:19:18,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:18,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956783027] [2025-03-17 06:19:18,480 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:19:18,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:18,533 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 06:19:18,559 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 06:19:18,560 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:19:18,560 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:18,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:18,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:18,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956783027] [2025-03-17 06:19:18,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956783027] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:19:18,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:19:18,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 06:19:18,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238417688] [2025-03-17 06:19:18,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:19:18,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 06:19:18,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:18,788 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 06:19:18,788 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 06:19:18,793 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-17 06:19:18,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 69 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:19:18,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:18,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-17 06:19:18,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:19,011 INFO L124 PetriNetUnfolderBase]: 395/736 cut-off events. [2025-03-17 06:19:19,011 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2025-03-17 06:19:19,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1440 conditions, 736 events. 395/736 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3212 event pairs, 84 based on Foata normal form. 45/717 useless extension candidates. Maximal degree in co-relation 1358. Up to 343 conditions per place. [2025-03-17 06:19:19,017 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 52 selfloop transitions, 6 changer transitions 2/65 dead transitions. [2025-03-17 06:19:19,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 65 transitions, 268 flow [2025-03-17 06:19:19,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:19:19,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:19:19,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2025-03-17 06:19:19,030 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6058823529411764 [2025-03-17 06:19:19,031 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 69 flow. Second operand 5 states and 103 transitions. [2025-03-17 06:19:19,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 65 transitions, 268 flow [2025-03-17 06:19:19,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 65 transitions, 259 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 06:19:19,038 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 112 flow [2025-03-17 06:19:19,039 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=112, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2025-03-17 06:19:19,043 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 5 predicate places. [2025-03-17 06:19:19,044 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 112 flow [2025-03-17 06:19:19,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:19:19,045 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:19,045 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:19,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 06:19:19,046 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-17 06:19:19,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:19,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1853766851, now seen corresponding path program 1 times [2025-03-17 06:19:19,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:19,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938336064] [2025-03-17 06:19:19,046 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:19:19,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:19,063 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 06:19:19,084 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 06:19:19,084 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:19:19,085 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:19,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:19,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938336064] [2025-03-17 06:19:19,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938336064] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:19:19,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022589668] [2025-03-17 06:19:19,245 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:19:19,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:19,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:19:19,248 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:19:19,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 06:19:19,311 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-17 06:19:19,331 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-17 06:19:19,331 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:19:19,331 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:19,334 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-17 06:19:19,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:19:19,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-17 06:19:19,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:19,472 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:19:19,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:19,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022589668] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:19:19,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:19:19,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2025-03-17 06:19:19,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273385923] [2025-03-17 06:19:19,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:19:19,552 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 06:19:19,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:19,553 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 06:19:19,553 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2025-03-17 06:19:19,556 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-17 06:19:19,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 112 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:19:19,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:19,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-17 06:19:19,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:20,011 INFO L124 PetriNetUnfolderBase]: 1222/2267 cut-off events. [2025-03-17 06:19:20,012 INFO L125 PetriNetUnfolderBase]: For 943/949 co-relation queries the response was YES. [2025-03-17 06:19:20,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5251 conditions, 2267 events. 1222/2267 cut-off events. For 943/949 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 11852 event pairs, 173 based on Foata normal form. 21/2187 useless extension candidates. Maximal degree in co-relation 4660. Up to 507 conditions per place. [2025-03-17 06:19:20,027 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 151 selfloop transitions, 32 changer transitions 2/190 dead transitions. [2025-03-17 06:19:20,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 190 transitions, 949 flow [2025-03-17 06:19:20,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-17 06:19:20,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-17 06:19:20,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 275 transitions. [2025-03-17 06:19:20,032 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6221719457013575 [2025-03-17 06:19:20,032 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 112 flow. Second operand 13 states and 275 transitions. [2025-03-17 06:19:20,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 190 transitions, 949 flow [2025-03-17 06:19:20,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 190 transitions, 949 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-17 06:19:20,038 INFO L231 Difference]: Finished difference. Result has 55 places, 64 transitions, 414 flow [2025-03-17 06:19:20,039 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=414, PETRI_PLACES=55, PETRI_TRANSITIONS=64} [2025-03-17 06:19:20,040 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 23 predicate places. [2025-03-17 06:19:20,040 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 64 transitions, 414 flow [2025-03-17 06:19:20,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:19:20,040 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:20,040 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:20,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-17 06:19:20,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:20,244 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-17 06:19:20,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:20,245 INFO L85 PathProgramCache]: Analyzing trace with hash -765584779, now seen corresponding path program 1 times [2025-03-17 06:19:20,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:20,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279406102] [2025-03-17 06:19:20,245 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:19:20,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:20,258 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-17 06:19:20,264 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 06:19:20,264 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:19:20,264 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:20,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:20,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279406102] [2025-03-17 06:19:20,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279406102] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:19:20,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:19:20,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 06:19:20,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882725807] [2025-03-17 06:19:20,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:19:20,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:19:20,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:20,339 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:19:20,339 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:19:20,340 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-03-17 06:19:20,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 64 transitions, 414 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:19:20,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:20,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-03-17 06:19:20,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:20,465 INFO L124 PetriNetUnfolderBase]: 636/1280 cut-off events. [2025-03-17 06:19:20,465 INFO L125 PetriNetUnfolderBase]: For 851/851 co-relation queries the response was YES. [2025-03-17 06:19:20,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3093 conditions, 1280 events. 636/1280 cut-off events. For 851/851 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 6238 event pairs, 210 based on Foata normal form. 62/1327 useless extension candidates. Maximal degree in co-relation 2944. Up to 605 conditions per place. [2025-03-17 06:19:20,474 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 42 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2025-03-17 06:19:20,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 57 transitions, 372 flow [2025-03-17 06:19:20,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:19:20,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:19:20,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2025-03-17 06:19:20,476 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5686274509803921 [2025-03-17 06:19:20,477 INFO L175 Difference]: Start difference. First operand has 55 places, 64 transitions, 414 flow. Second operand 3 states and 58 transitions. [2025-03-17 06:19:20,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 57 transitions, 372 flow [2025-03-17 06:19:20,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 324 flow, removed 24 selfloop flow, removed 3 redundant places. [2025-03-17 06:19:20,488 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 217 flow [2025-03-17 06:19:20,489 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=217, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2025-03-17 06:19:20,489 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 19 predicate places. [2025-03-17 06:19:20,490 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 217 flow [2025-03-17 06:19:20,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:19:20,490 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:20,490 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:20,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 06:19:20,490 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-17 06:19:20,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:20,492 INFO L85 PathProgramCache]: Analyzing trace with hash -571463648, now seen corresponding path program 1 times [2025-03-17 06:19:20,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:20,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646842094] [2025-03-17 06:19:20,492 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:19:20,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:20,499 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-17 06:19:20,521 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-17 06:19:20,521 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:19:20,521 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:20,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:20,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:20,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646842094] [2025-03-17 06:19:20,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646842094] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:19:20,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:19:20,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 06:19:20,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686419337] [2025-03-17 06:19:20,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:19:20,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:19:20,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:20,896 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:19:20,896 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:19:20,900 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-03-17 06:19:20,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 217 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:19:20,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:20,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-03-17 06:19:20,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:21,121 INFO L124 PetriNetUnfolderBase]: 885/1803 cut-off events. [2025-03-17 06:19:21,121 INFO L125 PetriNetUnfolderBase]: For 897/897 co-relation queries the response was YES. [2025-03-17 06:19:21,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4255 conditions, 1803 events. 885/1803 cut-off events. For 897/897 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 9716 event pairs, 279 based on Foata normal form. 0/1784 useless extension candidates. Maximal degree in co-relation 3874. Up to 996 conditions per place. [2025-03-17 06:19:21,128 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 59 selfloop transitions, 8 changer transitions 5/83 dead transitions. [2025-03-17 06:19:21,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 83 transitions, 492 flow [2025-03-17 06:19:21,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:19:21,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:19:21,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2025-03-17 06:19:21,129 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5647058823529412 [2025-03-17 06:19:21,129 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 217 flow. Second operand 5 states and 96 transitions. [2025-03-17 06:19:21,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 83 transitions, 492 flow [2025-03-17 06:19:21,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 83 transitions, 481 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 06:19:21,133 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 297 flow [2025-03-17 06:19:21,133 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=297, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2025-03-17 06:19:21,134 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 24 predicate places. [2025-03-17 06:19:21,134 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 297 flow [2025-03-17 06:19:21,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:19:21,134 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:21,134 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:21,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 06:19:21,135 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-17 06:19:21,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:21,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1357087785, now seen corresponding path program 1 times [2025-03-17 06:19:21,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:21,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188898468] [2025-03-17 06:19:21,135 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:19:21,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:21,146 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-17 06:19:21,168 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 06:19:21,171 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:19:21,172 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:21,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:21,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:21,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188898468] [2025-03-17 06:19:21,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188898468] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:19:21,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198134999] [2025-03-17 06:19:21,633 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:19:21,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:21,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:19:21,637 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:19:21,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 06:19:21,700 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-17 06:19:21,718 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 06:19:21,718 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:19:21,718 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:21,719 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-17 06:19:21,722 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:19:21,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-17 06:19:21,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2025-03-17 06:19:21,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 32 [2025-03-17 06:19:21,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:21,944 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:19:22,191 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 9 treesize of output 1 [2025-03-17 06:19:22,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:22,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198134999] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:19:22,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:19:22,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2025-03-17 06:19:22,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427639336] [2025-03-17 06:19:22,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:19:22,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-17 06:19:22,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:22,239 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-17 06:19:22,239 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-03-17 06:19:22,244 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-17 06:19:22,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 297 flow. Second operand has 14 states, 14 states have (on average 10.857142857142858) internal successors, (152), 14 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:19:22,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:22,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-17 06:19:22,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:23,220 INFO L124 PetriNetUnfolderBase]: 1525/3015 cut-off events. [2025-03-17 06:19:23,221 INFO L125 PetriNetUnfolderBase]: For 2234/2234 co-relation queries the response was YES. [2025-03-17 06:19:23,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7153 conditions, 3015 events. 1525/3015 cut-off events. For 2234/2234 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 15648 event pairs, 303 based on Foata normal form. 21/3027 useless extension candidates. Maximal degree in co-relation 6216. Up to 490 conditions per place. [2025-03-17 06:19:23,233 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 181 selfloop transitions, 44 changer transitions 22/252 dead transitions. [2025-03-17 06:19:23,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 252 transitions, 1415 flow [2025-03-17 06:19:23,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-17 06:19:23,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-17 06:19:23,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 388 transitions. [2025-03-17 06:19:23,235 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5434173669467787 [2025-03-17 06:19:23,235 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 297 flow. Second operand 21 states and 388 transitions. [2025-03-17 06:19:23,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 252 transitions, 1415 flow [2025-03-17 06:19:23,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 252 transitions, 1411 flow, removed 2 selfloop flow, removed 0 redundant places. [2025-03-17 06:19:23,244 INFO L231 Difference]: Finished difference. Result has 83 places, 77 transitions, 560 flow [2025-03-17 06:19:23,245 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=560, PETRI_PLACES=83, PETRI_TRANSITIONS=77} [2025-03-17 06:19:23,245 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 51 predicate places. [2025-03-17 06:19:23,245 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 77 transitions, 560 flow [2025-03-17 06:19:23,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.857142857142858) internal successors, (152), 14 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:19:23,245 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:23,246 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:23,252 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-17 06:19:23,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:23,446 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-17 06:19:23,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:23,447 INFO L85 PathProgramCache]: Analyzing trace with hash -888309208, now seen corresponding path program 1 times [2025-03-17 06:19:23,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:23,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50661702] [2025-03-17 06:19:23,447 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:19:23,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:23,460 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-17 06:19:23,469 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 06:19:23,469 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:19:23,469 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:23,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:23,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:23,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50661702] [2025-03-17 06:19:23,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50661702] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:19:23,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264886879] [2025-03-17 06:19:23,608 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:19:23,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:23,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:19:23,610 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:19:23,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 06:19:23,672 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-17 06:19:23,692 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 06:19:23,692 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:19:23,692 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:23,693 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 06:19:23,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:19:23,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-17 06:19:23,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-17 06:19:23,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:23,896 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:19:23,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:19:23,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264886879] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 06:19:23,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 06:19:23,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 6] total 11 [2025-03-17 06:19:23,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064106589] [2025-03-17 06:19:23,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:19:23,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:19:23,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:23,932 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:19:23,932 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2025-03-17 06:19:23,936 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-17 06:19:23,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 77 transitions, 560 flow. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:19:23,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:23,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-17 06:19:23,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:24,247 INFO L124 PetriNetUnfolderBase]: 1653/3275 cut-off events. [2025-03-17 06:19:24,248 INFO L125 PetriNetUnfolderBase]: For 3941/3941 co-relation queries the response was YES. [2025-03-17 06:19:24,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8261 conditions, 3275 events. 1653/3275 cut-off events. For 3941/3941 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 17589 event pairs, 338 based on Foata normal form. 12/3285 useless extension candidates. Maximal degree in co-relation 7995. Up to 1292 conditions per place. [2025-03-17 06:19:24,262 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 74 selfloop transitions, 40 changer transitions 2/121 dead transitions. [2025-03-17 06:19:24,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 121 transitions, 951 flow [2025-03-17 06:19:24,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:19:24,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:19:24,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2025-03-17 06:19:24,263 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5490196078431373 [2025-03-17 06:19:24,263 INFO L175 Difference]: Start difference. First operand has 83 places, 77 transitions, 560 flow. Second operand 6 states and 112 transitions. [2025-03-17 06:19:24,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 121 transitions, 951 flow [2025-03-17 06:19:24,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 121 transitions, 916 flow, removed 13 selfloop flow, removed 2 redundant places. [2025-03-17 06:19:24,277 INFO L231 Difference]: Finished difference. Result has 87 places, 84 transitions, 682 flow [2025-03-17 06:19:24,277 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=682, PETRI_PLACES=87, PETRI_TRANSITIONS=84} [2025-03-17 06:19:24,278 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 55 predicate places. [2025-03-17 06:19:24,278 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 84 transitions, 682 flow [2025-03-17 06:19:24,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:19:24,279 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:24,279 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:24,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-17 06:19:24,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:24,483 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-17 06:19:24,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:24,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1616519692, now seen corresponding path program 1 times [2025-03-17 06:19:24,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:24,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940391983] [2025-03-17 06:19:24,484 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:19:24,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:24,494 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-17 06:19:24,518 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 06:19:24,518 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:19:24,519 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:24,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:24,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:24,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940391983] [2025-03-17 06:19:24,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940391983] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:19:24,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319397220] [2025-03-17 06:19:24,939 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:19:24,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:24,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:19:24,941 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:19:24,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 06:19:25,007 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-17 06:19:25,027 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 06:19:25,027 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:19:25,027 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:25,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-17 06:19:25,033 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:19:25,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-03-17 06:19:25,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 19 [2025-03-17 06:19:25,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2025-03-17 06:19:25,299 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:25,300 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:19:25,736 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:19:25,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 12 [2025-03-17 06:19:25,762 INFO L349 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2025-03-17 06:19:25,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 63 [2025-03-17 06:19:25,820 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:25,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319397220] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:19:25,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:19:25,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2025-03-17 06:19:25,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536502914] [2025-03-17 06:19:25,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:19:25,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-17 06:19:25,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:25,822 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-17 06:19:25,823 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2025-03-17 06:19:25,824 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-17 06:19:25,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 84 transitions, 682 flow. Second operand has 17 states, 17 states have (on average 11.058823529411764) internal successors, (188), 17 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:19:25,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:25,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-17 06:19:25,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:27,981 INFO L124 PetriNetUnfolderBase]: 4250/8391 cut-off events. [2025-03-17 06:19:27,981 INFO L125 PetriNetUnfolderBase]: For 14705/14705 co-relation queries the response was YES. [2025-03-17 06:19:27,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21944 conditions, 8391 events. 4250/8391 cut-off events. For 14705/14705 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 53545 event pairs, 847 based on Foata normal form. 91/8480 useless extension candidates. Maximal degree in co-relation 20787. Up to 1391 conditions per place. [2025-03-17 06:19:28,028 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 265 selfloop transitions, 135 changer transitions 48/453 dead transitions. [2025-03-17 06:19:28,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 453 transitions, 3438 flow [2025-03-17 06:19:28,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-17 06:19:28,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2025-03-17 06:19:28,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 559 transitions. [2025-03-17 06:19:28,033 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.530360531309298 [2025-03-17 06:19:28,033 INFO L175 Difference]: Start difference. First operand has 87 places, 84 transitions, 682 flow. Second operand 31 states and 559 transitions. [2025-03-17 06:19:28,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 453 transitions, 3438 flow [2025-03-17 06:19:28,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 453 transitions, 3135 flow, removed 54 selfloop flow, removed 4 redundant places. [2025-03-17 06:19:28,085 INFO L231 Difference]: Finished difference. Result has 122 places, 180 transitions, 1776 flow [2025-03-17 06:19:28,086 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1776, PETRI_PLACES=122, PETRI_TRANSITIONS=180} [2025-03-17 06:19:28,086 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 90 predicate places. [2025-03-17 06:19:28,086 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 180 transitions, 1776 flow [2025-03-17 06:19:28,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.058823529411764) internal successors, (188), 17 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:19:28,086 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:28,086 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2025-03-17 06:19:28,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-17 06:19:28,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:28,291 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-17 06:19:28,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:28,291 INFO L85 PathProgramCache]: Analyzing trace with hash 545832468, now seen corresponding path program 2 times [2025-03-17 06:19:28,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:28,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080577626] [2025-03-17 06:19:28,292 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:19:28,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:28,305 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-17 06:19:28,317 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-17 06:19:28,317 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:19:28,317 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:28,523 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:28,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:28,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080577626] [2025-03-17 06:19:28,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080577626] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:19:28,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184552295] [2025-03-17 06:19:28,524 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:19:28,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:28,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:19:28,526 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:19:28,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 06:19:28,596 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-17 06:19:28,619 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-17 06:19:28,620 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:19:28,620 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:28,621 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 06:19:28,624 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:19:28,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-17 06:19:28,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-17 06:19:28,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-17 06:19:28,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-17 06:19:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:28,789 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:19:29,060 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:29,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184552295] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:19:29,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:19:29,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2025-03-17 06:19:29,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329055747] [2025-03-17 06:19:29,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:19:29,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-17 06:19:29,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:29,061 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-17 06:19:29,061 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2025-03-17 06:19:29,063 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-17 06:19:29,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 180 transitions, 1776 flow. Second operand has 19 states, 19 states have (on average 10.894736842105264) internal successors, (207), 19 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:19:29,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:29,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-17 06:19:29,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:30,965 INFO L124 PetriNetUnfolderBase]: 7528/14792 cut-off events. [2025-03-17 06:19:30,965 INFO L125 PetriNetUnfolderBase]: For 29150/29150 co-relation queries the response was YES. [2025-03-17 06:19:31,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39702 conditions, 14792 events. 7528/14792 cut-off events. For 29150/29150 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 106969 event pairs, 1964 based on Foata normal form. 150/14940 useless extension candidates. Maximal degree in co-relation 38510. Up to 2538 conditions per place. [2025-03-17 06:19:31,046 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 306 selfloop transitions, 251 changer transitions 18/580 dead transitions. [2025-03-17 06:19:31,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 580 transitions, 5155 flow [2025-03-17 06:19:31,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-03-17 06:19:31,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2025-03-17 06:19:31,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 596 transitions. [2025-03-17 06:19:31,049 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5008403361344538 [2025-03-17 06:19:31,049 INFO L175 Difference]: Start difference. First operand has 122 places, 180 transitions, 1776 flow. Second operand 35 states and 596 transitions. [2025-03-17 06:19:31,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 580 transitions, 5155 flow [2025-03-17 06:19:31,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 580 transitions, 5023 flow, removed 64 selfloop flow, removed 1 redundant places. [2025-03-17 06:19:31,222 INFO L231 Difference]: Finished difference. Result has 164 places, 316 transitions, 3740 flow [2025-03-17 06:19:31,223 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1722, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3740, PETRI_PLACES=164, PETRI_TRANSITIONS=316} [2025-03-17 06:19:31,223 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 132 predicate places. [2025-03-17 06:19:31,224 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 316 transitions, 3740 flow [2025-03-17 06:19:31,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.894736842105264) internal successors, (207), 19 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:19:31,225 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:31,225 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2025-03-17 06:19:31,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-17 06:19:31,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:31,429 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-17 06:19:31,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:31,429 INFO L85 PathProgramCache]: Analyzing trace with hash -986642257, now seen corresponding path program 3 times [2025-03-17 06:19:31,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:31,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136545029] [2025-03-17 06:19:31,429 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:19:31,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:31,443 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 38 statements into 6 equivalence classes. [2025-03-17 06:19:31,474 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 38 of 38 statements. [2025-03-17 06:19:31,474 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-17 06:19:31,474 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:31,577 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 55 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:31,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:31,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136545029] [2025-03-17 06:19:31,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136545029] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:19:31,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650148313] [2025-03-17 06:19:31,578 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:19:31,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:31,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:19:31,580 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:19:31,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 06:19:31,659 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 38 statements into 6 equivalence classes. [2025-03-17 06:19:31,710 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 38 of 38 statements. [2025-03-17 06:19:31,710 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-17 06:19:31,710 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:31,712 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-17 06:19:31,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:19:31,752 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:31,752 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 06:19:31,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650148313] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:19:31,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 06:19:31,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2025-03-17 06:19:31,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917090549] [2025-03-17 06:19:31,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:19:31,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 06:19:31,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:31,754 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 06:19:31,755 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2025-03-17 06:19:31,757 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-17 06:19:31,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 316 transitions, 3740 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:19:31,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:31,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-17 06:19:31,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:33,851 INFO L124 PetriNetUnfolderBase]: 10552/19810 cut-off events. [2025-03-17 06:19:33,852 INFO L125 PetriNetUnfolderBase]: For 36651/36651 co-relation queries the response was YES. [2025-03-17 06:19:33,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53066 conditions, 19810 events. 10552/19810 cut-off events. For 36651/36651 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 146713 event pairs, 712 based on Foata normal form. 0/18821 useless extension candidates. Maximal degree in co-relation 52532. Up to 6408 conditions per place. [2025-03-17 06:19:33,946 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 349 selfloop transitions, 10 changer transitions 92/509 dead transitions. [2025-03-17 06:19:33,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 509 transitions, 6254 flow [2025-03-17 06:19:33,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 06:19:33,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 06:19:33,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2025-03-17 06:19:33,948 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6213235294117647 [2025-03-17 06:19:33,948 INFO L175 Difference]: Start difference. First operand has 164 places, 316 transitions, 3740 flow. Second operand 8 states and 169 transitions. [2025-03-17 06:19:33,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 509 transitions, 6254 flow [2025-03-17 06:19:34,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 509 transitions, 5733 flow, removed 96 selfloop flow, removed 14 redundant places. [2025-03-17 06:19:34,165 INFO L231 Difference]: Finished difference. Result has 154 places, 227 transitions, 2338 flow [2025-03-17 06:19:34,166 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2452, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2338, PETRI_PLACES=154, PETRI_TRANSITIONS=227} [2025-03-17 06:19:34,166 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 122 predicate places. [2025-03-17 06:19:34,166 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 227 transitions, 2338 flow [2025-03-17 06:19:34,166 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:19:34,166 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:34,167 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:34,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-17 06:19:34,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:34,367 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-17 06:19:34,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:34,368 INFO L85 PathProgramCache]: Analyzing trace with hash -347160202, now seen corresponding path program 2 times [2025-03-17 06:19:34,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:34,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279260777] [2025-03-17 06:19:34,368 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:19:34,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:34,380 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-17 06:19:34,408 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-17 06:19:34,408 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:19:34,408 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:35,141 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:35,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:35,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279260777] [2025-03-17 06:19:35,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279260777] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:19:35,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462895809] [2025-03-17 06:19:35,142 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:19:35,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:35,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:19:35,147 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:19:35,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 06:19:35,229 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-03-17 06:19:35,264 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-03-17 06:19:35,264 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:19:35,264 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:35,269 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-17 06:19:35,278 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:19:35,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-17 06:19:35,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 14 [2025-03-17 06:19:35,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 14 [2025-03-17 06:19:35,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2025-03-17 06:19:35,629 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:35,630 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:19:36,432 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:36,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462895809] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:19:36,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:19:36,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2025-03-17 06:19:36,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597331282] [2025-03-17 06:19:36,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:19:36,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-17 06:19:36,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:36,435 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-17 06:19:36,435 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2025-03-17 06:19:36,439 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-17 06:19:36,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 227 transitions, 2338 flow. Second operand has 26 states, 26 states have (on average 10.807692307692308) internal successors, (281), 26 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:19:36,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:36,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-17 06:19:36,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:38,586 INFO L124 PetriNetUnfolderBase]: 4847/9719 cut-off events. [2025-03-17 06:19:38,586 INFO L125 PetriNetUnfolderBase]: For 31543/31903 co-relation queries the response was YES. [2025-03-17 06:19:38,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28068 conditions, 9719 events. 4847/9719 cut-off events. For 31543/31903 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 65768 event pairs, 780 based on Foata normal form. 370/10088 useless extension candidates. Maximal degree in co-relation 27383. Up to 1695 conditions per place. [2025-03-17 06:19:38,622 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 179 selfloop transitions, 43 changer transitions 182/408 dead transitions. [2025-03-17 06:19:38,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 408 transitions, 3298 flow [2025-03-17 06:19:38,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-17 06:19:38,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-03-17 06:19:38,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 423 transitions. [2025-03-17 06:19:38,623 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47850678733031676 [2025-03-17 06:19:38,623 INFO L175 Difference]: Start difference. First operand has 154 places, 227 transitions, 2338 flow. Second operand 26 states and 423 transitions. [2025-03-17 06:19:38,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 408 transitions, 3298 flow [2025-03-17 06:19:38,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 408 transitions, 3250 flow, removed 5 selfloop flow, removed 5 redundant places. [2025-03-17 06:19:38,714 INFO L231 Difference]: Finished difference. Result has 160 places, 89 transitions, 835 flow [2025-03-17 06:19:38,714 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1315, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=835, PETRI_PLACES=160, PETRI_TRANSITIONS=89} [2025-03-17 06:19:38,715 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 128 predicate places. [2025-03-17 06:19:38,715 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 89 transitions, 835 flow [2025-03-17 06:19:38,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 10.807692307692308) internal successors, (281), 26 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:19:38,715 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:38,715 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:38,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-17 06:19:38,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:38,916 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-17 06:19:38,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:38,917 INFO L85 PathProgramCache]: Analyzing trace with hash 867286622, now seen corresponding path program 3 times [2025-03-17 06:19:38,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:38,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606709825] [2025-03-17 06:19:38,918 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:19:38,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:38,931 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 56 statements into 4 equivalence classes. [2025-03-17 06:19:38,964 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 56 of 56 statements. [2025-03-17 06:19:38,965 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-17 06:19:38,965 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:39,833 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:39,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:39,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606709825] [2025-03-17 06:19:39,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606709825] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:19:39,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982413355] [2025-03-17 06:19:39,833 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:19:39,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:39,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:19:39,835 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:19:39,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 06:19:39,913 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 56 statements into 4 equivalence classes. [2025-03-17 06:19:39,982 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 56 of 56 statements. [2025-03-17 06:19:39,982 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-17 06:19:39,982 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:39,984 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 39 conjuncts are in the unsatisfiable core [2025-03-17 06:19:39,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:19:40,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-17 06:19:40,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2025-03-17 06:19:40,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2025-03-17 06:19:40,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2025-03-17 06:19:40,503 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:19:40,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 38 [2025-03-17 06:19:40,527 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:40,527 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:19:41,014 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 6 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:41,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982413355] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:19:41,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:19:41,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 33 [2025-03-17 06:19:41,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750319975] [2025-03-17 06:19:41,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:19:41,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-17 06:19:41,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:41,016 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-17 06:19:41,016 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=787, Unknown=0, NotChecked=0, Total=1056 [2025-03-17 06:19:41,017 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-17 06:19:41,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 89 transitions, 835 flow. Second operand has 33 states, 33 states have (on average 10.545454545454545) internal successors, (348), 33 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:19:41,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:41,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-17 06:19:41,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:42,614 INFO L124 PetriNetUnfolderBase]: 1824/3911 cut-off events. [2025-03-17 06:19:42,614 INFO L125 PetriNetUnfolderBase]: For 11936/11990 co-relation queries the response was YES. [2025-03-17 06:19:42,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11348 conditions, 3911 events. 1824/3911 cut-off events. For 11936/11990 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 22274 event pairs, 187 based on Foata normal form. 46/3956 useless extension candidates. Maximal degree in co-relation 11179. Up to 702 conditions per place. [2025-03-17 06:19:42,632 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 113 selfloop transitions, 16 changer transitions 221/354 dead transitions. [2025-03-17 06:19:42,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 354 transitions, 2536 flow [2025-03-17 06:19:42,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-03-17 06:19:42,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2025-03-17 06:19:42,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 519 transitions. [2025-03-17 06:19:42,634 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44896193771626297 [2025-03-17 06:19:42,634 INFO L175 Difference]: Start difference. First operand has 160 places, 89 transitions, 835 flow. Second operand 34 states and 519 transitions. [2025-03-17 06:19:42,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 354 transitions, 2536 flow [2025-03-17 06:19:42,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 354 transitions, 2316 flow, removed 45 selfloop flow, removed 35 redundant places. [2025-03-17 06:19:42,660 INFO L231 Difference]: Finished difference. Result has 144 places, 45 transitions, 316 flow [2025-03-17 06:19:42,660 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=316, PETRI_PLACES=144, PETRI_TRANSITIONS=45} [2025-03-17 06:19:42,660 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 112 predicate places. [2025-03-17 06:19:42,660 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 45 transitions, 316 flow [2025-03-17 06:19:42,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 10.545454545454545) internal successors, (348), 33 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:19:42,661 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:42,661 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:42,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-17 06:19:42,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-03-17 06:19:42,862 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-17 06:19:42,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:42,862 INFO L85 PathProgramCache]: Analyzing trace with hash 457899436, now seen corresponding path program 4 times [2025-03-17 06:19:42,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:42,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357600912] [2025-03-17 06:19:42,863 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:19:42,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:42,878 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 69 statements into 2 equivalence classes. [2025-03-17 06:19:42,924 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 69 of 69 statements. [2025-03-17 06:19:42,924 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:19:42,924 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:44,191 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 54 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:44,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:44,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357600912] [2025-03-17 06:19:44,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357600912] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:19:44,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82046631] [2025-03-17 06:19:44,192 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:19:44,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:44,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:19:44,194 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:19:44,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-17 06:19:44,290 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 69 statements into 2 equivalence classes. [2025-03-17 06:19:44,331 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 69 of 69 statements. [2025-03-17 06:19:44,331 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:19:44,331 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:44,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-17 06:19:44,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:19:44,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-17 06:19:44,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 14 [2025-03-17 06:19:44,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 14 [2025-03-17 06:19:44,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 14 [2025-03-17 06:19:44,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 14 [2025-03-17 06:19:44,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2025-03-17 06:19:44,780 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:44,780 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:19:46,040 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:46,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82046631] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:19:46,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:19:46,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 39 [2025-03-17 06:19:46,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626736215] [2025-03-17 06:19:46,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:19:46,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-03-17 06:19:46,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:46,041 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-03-17 06:19:46,042 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1243, Unknown=0, NotChecked=0, Total=1560 [2025-03-17 06:19:46,044 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2025-03-17 06:19:46,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 45 transitions, 316 flow. Second operand has 40 states, 40 states have (on average 10.975) internal successors, (439), 40 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:19:46,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:46,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2025-03-17 06:19:46,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:47,081 INFO L124 PetriNetUnfolderBase]: 483/1053 cut-off events. [2025-03-17 06:19:47,081 INFO L125 PetriNetUnfolderBase]: For 2121/2121 co-relation queries the response was YES. [2025-03-17 06:19:47,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2964 conditions, 1053 events. 483/1053 cut-off events. For 2121/2121 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 3491 event pairs, 51 based on Foata normal form. 14/1066 useless extension candidates. Maximal degree in co-relation 2936. Up to 174 conditions per place. [2025-03-17 06:19:47,085 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 0 selfloop transitions, 0 changer transitions 137/137 dead transitions. [2025-03-17 06:19:47,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 137 transitions, 841 flow [2025-03-17 06:19:47,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-17 06:19:47,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-17 06:19:47,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 262 transitions. [2025-03-17 06:19:47,086 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42810457516339867 [2025-03-17 06:19:47,086 INFO L175 Difference]: Start difference. First operand has 144 places, 45 transitions, 316 flow. Second operand 18 states and 262 transitions. [2025-03-17 06:19:47,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 137 transitions, 841 flow [2025-03-17 06:19:47,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 137 transitions, 719 flow, removed 15 selfloop flow, removed 50 redundant places. [2025-03-17 06:19:47,089 INFO L231 Difference]: Finished difference. Result has 76 places, 0 transitions, 0 flow [2025-03-17 06:19:47,089 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=0, PETRI_PLACES=76, PETRI_TRANSITIONS=0} [2025-03-17 06:19:47,090 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 44 predicate places. [2025-03-17 06:19:47,090 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 0 transitions, 0 flow [2025-03-17 06:19:47,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 10.975) internal successors, (439), 40 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:19:47,092 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2025-03-17 06:19:47,092 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2025-03-17 06:19:47,092 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2025-03-17 06:19:47,092 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2025-03-17 06:19:47,092 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2025-03-17 06:19:47,092 INFO L782 garLoopResultBuilder]: Registering result SAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2025-03-17 06:19:47,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-17 06:19:47,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:47,293 INFO L422 BasicCegarLoop]: Path program histogram: [4, 3, 1, 1, 1, 1, 1] [2025-03-17 06:19:47,297 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-03-17 06:19:47,297 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-17 06:19:47,300 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 06:19:47 BasicIcfg [2025-03-17 06:19:47,300 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-17 06:19:47,300 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-17 06:19:47,300 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-17 06:19:47,300 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-17 06:19:47,301 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:19:18" (3/4) ... [2025-03-17 06:19:47,302 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-03-17 06:19:47,303 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure t1 [2025-03-17 06:19:47,303 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure t2 [2025-03-17 06:19:47,305 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 31 nodes and edges [2025-03-17 06:19:47,305 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2025-03-17 06:19:47,306 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2025-03-17 06:19:47,306 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2025-03-17 06:19:47,360 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-03-17 06:19:47,360 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2025-03-17 06:19:47,360 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-17 06:19:47,361 INFO L158 Benchmark]: Toolchain (without parser) took 30167.72ms. Allocated memory was 167.8MB in the beginning and 1.6GB in the end (delta: 1.4GB). Free memory was 131.2MB in the beginning and 459.3MB in the end (delta: -328.0MB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. [2025-03-17 06:19:47,361 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 201.3MB. Free memory is still 125.8MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-17 06:19:47,361 INFO L158 Benchmark]: CACSL2BoogieTranslator took 489.37ms. Allocated memory is still 167.8MB. Free memory was 131.2MB in the beginning and 102.0MB in the end (delta: 29.3MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2025-03-17 06:19:47,361 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.99ms. Allocated memory is still 167.8MB. Free memory was 102.0MB in the beginning and 99.8MB in the end (delta: 2.2MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-17 06:19:47,361 INFO L158 Benchmark]: Boogie Preprocessor took 48.87ms. Allocated memory is still 167.8MB. Free memory was 99.8MB in the beginning and 97.7MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-17 06:19:47,361 INFO L158 Benchmark]: IcfgBuilder took 499.49ms. Allocated memory is still 167.8MB. Free memory was 97.7MB in the beginning and 58.5MB in the end (delta: 39.2MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. [2025-03-17 06:19:47,361 INFO L158 Benchmark]: TraceAbstraction took 29017.12ms. Allocated memory was 167.8MB in the beginning and 1.6GB in the end (delta: 1.4GB). Free memory was 58.1MB in the beginning and 463.8MB in the end (delta: -405.7MB). Peak memory consumption was 1.0GB. Max. memory is 16.1GB. [2025-03-17 06:19:47,362 INFO L158 Benchmark]: Witness Printer took 60.12ms. Allocated memory is still 1.6GB. Free memory was 463.8MB in the beginning and 459.3MB in the end (delta: 4.5MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-17 06:19:47,362 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 201.3MB. Free memory is still 125.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 489.37ms. Allocated memory is still 167.8MB. Free memory was 131.2MB in the beginning and 102.0MB in the end (delta: 29.3MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.99ms. Allocated memory is still 167.8MB. Free memory was 102.0MB in the beginning and 99.8MB in the end (delta: 2.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 48.87ms. Allocated memory is still 167.8MB. Free memory was 99.8MB in the beginning and 97.7MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 499.49ms. Allocated memory is still 167.8MB. Free memory was 97.7MB in the beginning and 58.5MB in the end (delta: 39.2MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. * TraceAbstraction took 29017.12ms. Allocated memory was 167.8MB in the beginning and 1.6GB in the end (delta: 1.4GB). Free memory was 58.1MB in the beginning and 463.8MB in the end (delta: -405.7MB). Peak memory consumption was 1.0GB. Max. memory is 16.1GB. * Witness Printer took 60.12ms. Allocated memory is still 1.6GB. Free memory was 463.8MB in the beginning and 459.3MB in the end (delta: 4.5MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 941]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 941]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 53 locations, 62 edges, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 28.9s, OverallIterations: 12, TraceHistogramMax: 6, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 14.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2986 SdHoareTripleChecker+Valid, 4.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2983 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 3.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 291 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7587 IncrementalHoareTripleChecker+Invalid, 7878 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 291 mSolverCounterUnsat, 1 mSDtfsCounter, 7587 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 842 GetRequests, 541 SyntacticMatches, 1 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3096 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3740occurred in iteration=8, InterpolantAutomatonStates: 205, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 11.2s InterpolantComputationTime, 708 NumberOfCodeBlocks, 708 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 975 ConstructedInterpolants, 11 QuantifiedInterpolants, 17272 SizeOfPredicates, 112 NumberOfNonLiveVariables, 2059 ConjunctsInSsa, 156 ConjunctsInUnsatCore, 29 InterpolantComputations, 5 PerfectInterpolantSequences, 252/1030 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-03-17 06:19:47,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE