./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/bigshot_s.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/bigshot_s.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 4d8c741fd238f074816319de9a9bd5d97cd9b35eb7f53a276be973ea0c31ecbe --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 19:02:41,169 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 19:02:41,254 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 19:02:41,258 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 19:02:41,258 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 19:02:41,277 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 19:02:41,278 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 19:02:41,278 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 19:02:41,279 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 19:02:41,280 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 19:02:41,280 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 19:02:41,281 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 19:02:41,282 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 19:02:41,283 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 19:02:41,284 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 19:02:41,284 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 19:02:41,284 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 19:02:41,285 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 19:02:41,285 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 19:02:41,285 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 19:02:41,289 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 19:02:41,289 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 19:02:41,290 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 19:02:41,290 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 19:02:41,290 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 19:02:41,290 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 19:02:41,291 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 19:02:41,291 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 19:02:41,291 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 19:02:41,291 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 19:02:41,292 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 19:02:41,292 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 19:02:41,292 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:02:41,292 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 19:02:41,292 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 19:02:41,293 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 19:02:41,293 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 19:02:41,293 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 19:02:41,293 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 19:02:41,293 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 19:02:41,294 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 19:02:41,294 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 19:02:41,294 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d8c741fd238f074816319de9a9bd5d97cd9b35eb7f53a276be973ea0c31ecbe [2024-11-16 19:02:41,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 19:02:41,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 19:02:41,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 19:02:41,591 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 19:02:41,591 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 19:02:41,592 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/bigshot_s.i [2024-11-16 19:02:43,017 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 19:02:43,328 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 19:02:43,328 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/bigshot_s.i [2024-11-16 19:02:43,354 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1d216a96/c474570029f147ec8125a37fd191fb94/FLAG1fa34347e [2024-11-16 19:02:43,371 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1d216a96/c474570029f147ec8125a37fd191fb94 [2024-11-16 19:02:43,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 19:02:43,376 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 19:02:43,379 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 19:02:43,380 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 19:02:43,385 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 19:02:43,386 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:02:43" (1/1) ... [2024-11-16 19:02:43,387 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f906c32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:02:43, skipping insertion in model container [2024-11-16 19:02:43,387 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:02:43" (1/1) ... [2024-11-16 19:02:43,436 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 19:02:43,918 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/bigshot_s.i[55202,55215] [2024-11-16 19:02:43,931 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:02:43,939 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 19:02:44,002 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/bigshot_s.i[55202,55215] [2024-11-16 19:02:44,011 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:02:44,066 INFO L204 MainTranslator]: Completed translation [2024-11-16 19:02:44,067 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:02:44 WrapperNode [2024-11-16 19:02:44,067 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 19:02:44,068 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 19:02:44,068 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 19:02:44,069 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 19:02:44,076 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:02:44" (1/1) ... [2024-11-16 19:02:44,096 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:02:44" (1/1) ... [2024-11-16 19:02:44,118 INFO L138 Inliner]: procedures = 322, calls = 23, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 61 [2024-11-16 19:02:44,119 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 19:02:44,119 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 19:02:44,119 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 19:02:44,120 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 19:02:44,127 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:02:44" (1/1) ... [2024-11-16 19:02:44,128 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:02:44" (1/1) ... [2024-11-16 19:02:44,130 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:02:44" (1/1) ... [2024-11-16 19:02:44,143 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 9, 2]. 69 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 1 writes are split as follows [0, 0, 1]. [2024-11-16 19:02:44,144 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:02:44" (1/1) ... [2024-11-16 19:02:44,144 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:02:44" (1/1) ... [2024-11-16 19:02:44,149 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:02:44" (1/1) ... [2024-11-16 19:02:44,150 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:02:44" (1/1) ... [2024-11-16 19:02:44,151 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:02:44" (1/1) ... [2024-11-16 19:02:44,152 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:02:44" (1/1) ... [2024-11-16 19:02:44,154 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 19:02:44,155 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 19:02:44,156 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 19:02:44,156 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 19:02:44,156 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:02:44" (1/1) ... [2024-11-16 19:02:44,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:02:44,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:02:44,184 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-16 19:02:44,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-16 19:02:44,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2024-11-16 19:02:44,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2024-11-16 19:02:44,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2024-11-16 19:02:44,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 19:02:44,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 19:02:44,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-16 19:02:44,224 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-16 19:02:44,224 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-16 19:02:44,224 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-16 19:02:44,224 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-16 19:02:44,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-16 19:02:44,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 19:02:44,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 19:02:44,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 19:02:44,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-16 19:02:44,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 19:02:44,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 19:02:44,226 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-16 19:02:44,347 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 19:02:44,349 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 19:02:44,493 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-16 19:02:44,494 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 19:02:44,611 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 19:02:44,611 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 19:02:44,611 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:02:44 BoogieIcfgContainer [2024-11-16 19:02:44,612 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 19:02:44,614 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 19:02:44,614 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 19:02:44,617 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 19:02:44,618 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:02:43" (1/3) ... [2024-11-16 19:02:44,618 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2607a53f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:02:44, skipping insertion in model container [2024-11-16 19:02:44,618 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:02:44" (2/3) ... [2024-11-16 19:02:44,619 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2607a53f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:02:44, skipping insertion in model container [2024-11-16 19:02:44,619 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:02:44" (3/3) ... [2024-11-16 19:02:44,620 INFO L112 eAbstractionObserver]: Analyzing ICFG bigshot_s.i [2024-11-16 19:02:44,637 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 19:02:44,637 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 19:02:44,637 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-16 19:02:44,687 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-16 19:02:44,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 26 transitions, 66 flow [2024-11-16 19:02:44,744 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2024-11-16 19:02:44,745 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:02:44,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 24 events. 4/24 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 16 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2024-11-16 19:02:44,751 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 26 transitions, 66 flow [2024-11-16 19:02:44,754 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 21 transitions, 54 flow [2024-11-16 19:02:44,764 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:02:44,770 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;@180d7193, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:02:44,770 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-16 19:02:44,778 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:02:44,778 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2024-11-16 19:02:44,778 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:02:44,779 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:02:44,779 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:02:44,780 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:02:44,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:02:44,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1327887776, now seen corresponding path program 1 times [2024-11-16 19:02:44,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:02:44,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348877771] [2024-11-16 19:02:44,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:02:44,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:02:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:02:45,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:02:45,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:02:45,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348877771] [2024-11-16 19:02:45,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348877771] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:02:45,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:02:45,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:02:45,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094835762] [2024-11-16 19:02:45,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:02:45,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:02:45,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:02:45,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:02:45,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:02:45,089 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-11-16 19:02:45,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:02:45,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:02:45,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-11-16 19:02:45,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:02:45,135 INFO L124 PetriNetUnfolderBase]: 7/31 cut-off events. [2024-11-16 19:02:45,136 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:02:45,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68 conditions, 31 events. 7/31 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 21 event pairs, 4 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 47. Up to 24 conditions per place. [2024-11-16 19:02:45,138 INFO L140 encePairwiseOnDemand]: 23/26 looper letters, 16 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2024-11-16 19:02:45,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 20 transitions, 86 flow [2024-11-16 19:02:45,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:02:45,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:02:45,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 37 transitions. [2024-11-16 19:02:45,149 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-11-16 19:02:45,150 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 54 flow. Second operand 3 states and 37 transitions. [2024-11-16 19:02:45,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 20 transitions, 86 flow [2024-11-16 19:02:45,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 20 transitions, 78 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-16 19:02:45,155 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2024-11-16 19:02:45,156 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2024-11-16 19:02:45,159 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, -2 predicate places. [2024-11-16 19:02:45,159 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2024-11-16 19:02:45,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:02:45,159 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:02:45,159 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:02:45,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 19:02:45,160 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:02:45,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:02:45,161 INFO L85 PathProgramCache]: Analyzing trace with hash -594925848, now seen corresponding path program 1 times [2024-11-16 19:02:45,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:02:45,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669479346] [2024-11-16 19:02:45,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:02:45,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:02:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:02:45,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:02:45,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:02:45,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669479346] [2024-11-16 19:02:45,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669479346] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:02:45,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:02:45,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-16 19:02:45,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623429159] [2024-11-16 19:02:45,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:02:45,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-16 19:02:45,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:02:45,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-16 19:02:45,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-16 19:02:45,845 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-11-16 19:02:45,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:02:45,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:02:45,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-11-16 19:02:45,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:02:46,029 INFO L124 PetriNetUnfolderBase]: 12/49 cut-off events. [2024-11-16 19:02:46,029 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-16 19:02:46,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 49 events. 12/49 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 80 event pairs, 4 based on Foata normal form. 1/49 useless extension candidates. Maximal degree in co-relation 82. Up to 24 conditions per place. [2024-11-16 19:02:46,030 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 17 selfloop transitions, 6 changer transitions 4/30 dead transitions. [2024-11-16 19:02:46,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 30 transitions, 121 flow [2024-11-16 19:02:46,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-16 19:02:46,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-16 19:02:46,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 68 transitions. [2024-11-16 19:02:46,032 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3269230769230769 [2024-11-16 19:02:46,033 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 8 states and 68 transitions. [2024-11-16 19:02:46,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 30 transitions, 121 flow [2024-11-16 19:02:46,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 30 transitions, 120 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:02:46,034 INFO L231 Difference]: Finished difference. Result has 32 places, 22 transitions, 75 flow [2024-11-16 19:02:46,035 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=75, PETRI_PLACES=32, PETRI_TRANSITIONS=22} [2024-11-16 19:02:46,036 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 7 predicate places. [2024-11-16 19:02:46,036 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 22 transitions, 75 flow [2024-11-16 19:02:46,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:02:46,037 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:02:46,037 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:02:46,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 19:02:46,038 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:02:46,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:02:46,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1358804919, now seen corresponding path program 1 times [2024-11-16 19:02:46,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:02:46,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841978652] [2024-11-16 19:02:46,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:02:46,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:02:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:02:46,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:02:46,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:02:46,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841978652] [2024-11-16 19:02:46,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841978652] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:02:46,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614077384] [2024-11-16 19:02:46,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:02:46,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:02:46,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:02:46,272 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:02:46,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 19:02:46,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:02:46,380 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-16 19:02:46,385 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:02:46,533 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 15 treesize of output 7 [2024-11-16 19:02:46,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:02:46,553 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:02:46,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:02:46,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614077384] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:02:46,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:02:46,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-11-16 19:02:46,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887281684] [2024-11-16 19:02:46,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:02:46,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-16 19:02:46,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:02:46,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-16 19:02:46,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-16 19:02:46,643 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-11-16 19:02:46,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 22 transitions, 75 flow. Second operand has 14 states, 14 states have (on average 9.0) internal successors, (126), 14 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:02:46,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:02:46,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-11-16 19:02:46,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:02:46,823 INFO L124 PetriNetUnfolderBase]: 14/50 cut-off events. [2024-11-16 19:02:46,823 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-16 19:02:46,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 50 events. 14/50 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 51 event pairs, 6 based on Foata normal form. 2/52 useless extension candidates. Maximal degree in co-relation 125. Up to 30 conditions per place. [2024-11-16 19:02:46,824 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 20 selfloop transitions, 6 changer transitions 1/29 dead transitions. [2024-11-16 19:02:46,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 29 transitions, 147 flow [2024-11-16 19:02:46,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-16 19:02:46,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-16 19:02:46,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 70 transitions. [2024-11-16 19:02:46,829 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2024-11-16 19:02:46,829 INFO L175 Difference]: Start difference. First operand has 32 places, 22 transitions, 75 flow. Second operand 7 states and 70 transitions. [2024-11-16 19:02:46,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 29 transitions, 147 flow [2024-11-16 19:02:46,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 29 transitions, 138 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-16 19:02:46,831 INFO L231 Difference]: Finished difference. Result has 35 places, 24 transitions, 96 flow [2024-11-16 19:02:46,831 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=96, PETRI_PLACES=35, PETRI_TRANSITIONS=24} [2024-11-16 19:02:46,832 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 10 predicate places. [2024-11-16 19:02:46,832 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 24 transitions, 96 flow [2024-11-16 19:02:46,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.0) internal successors, (126), 14 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:02:46,833 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:02:46,833 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:02:46,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-16 19:02:47,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:02:47,041 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:02:47,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:02:47,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1288534452, now seen corresponding path program 2 times [2024-11-16 19:02:47,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:02:47,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607000006] [2024-11-16 19:02:47,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:02:47,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:02:47,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:02:47,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:02:47,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:02:47,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607000006] [2024-11-16 19:02:47,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607000006] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:02:47,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499940085] [2024-11-16 19:02:47,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:02:47,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:02:47,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:02:47,310 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:02:47,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 19:02:47,407 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:02:47,407 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:02:47,410 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-16 19:02:47,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:02:47,535 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 15 treesize of output 7 [2024-11-16 19:02:47,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:02:47,548 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:02:47,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:02:47,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499940085] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:02:47,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:02:47,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-16 19:02:47,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100194712] [2024-11-16 19:02:47,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:02:47,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-16 19:02:47,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:02:47,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-16 19:02:47,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-11-16 19:02:47,641 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-11-16 19:02:47,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 24 transitions, 96 flow. Second operand has 17 states, 17 states have (on average 8.941176470588236) internal successors, (152), 17 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) [2024-11-16 19:02:47,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:02:47,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-11-16 19:02:47,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:02:47,866 INFO L124 PetriNetUnfolderBase]: 16/56 cut-off events. [2024-11-16 19:02:47,866 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-16 19:02:47,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 56 events. 16/56 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 6 based on Foata normal form. 2/58 useless extension candidates. Maximal degree in co-relation 151. Up to 30 conditions per place. [2024-11-16 19:02:47,868 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 22 selfloop transitions, 7 changer transitions 1/32 dead transitions. [2024-11-16 19:02:47,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 32 transitions, 182 flow [2024-11-16 19:02:47,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-16 19:02:47,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-16 19:02:47,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 79 transitions. [2024-11-16 19:02:47,869 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3798076923076923 [2024-11-16 19:02:47,869 INFO L175 Difference]: Start difference. First operand has 35 places, 24 transitions, 96 flow. Second operand 8 states and 79 transitions. [2024-11-16 19:02:47,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 32 transitions, 182 flow [2024-11-16 19:02:47,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 32 transitions, 170 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-16 19:02:47,872 INFO L231 Difference]: Finished difference. Result has 40 places, 26 transitions, 120 flow [2024-11-16 19:02:47,872 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=120, PETRI_PLACES=40, PETRI_TRANSITIONS=26} [2024-11-16 19:02:47,873 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 15 predicate places. [2024-11-16 19:02:47,873 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 26 transitions, 120 flow [2024-11-16 19:02:47,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.941176470588236) internal successors, (152), 17 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) [2024-11-16 19:02:47,873 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:02:47,873 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:02:47,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-16 19:02:48,077 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-16 19:02:48,078 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:02:48,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:02:48,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1108913513, now seen corresponding path program 3 times [2024-11-16 19:02:48,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:02:48,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450694409] [2024-11-16 19:02:48,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:02:48,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:02:48,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:02:48,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:02:48,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:02:48,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450694409] [2024-11-16 19:02:48,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450694409] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:02:48,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458768884] [2024-11-16 19:02:48,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 19:02:48,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:02:48,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:02:48,333 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:02:48,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 19:02:48,424 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-16 19:02:48,424 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:02:48,425 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-16 19:02:48,430 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:02:48,576 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 15 treesize of output 7 [2024-11-16 19:02:48,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:02:48,590 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:02:48,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:02:48,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458768884] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:02:48,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:02:48,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-16 19:02:48,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982595157] [2024-11-16 19:02:48,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:02:48,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-16 19:02:48,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:02:48,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-16 19:02:48,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-11-16 19:02:48,694 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-11-16 19:02:48,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 26 transitions, 120 flow. Second operand has 20 states, 20 states have (on average 8.8) internal successors, (176), 20 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:02:48,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:02:48,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-11-16 19:02:48,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:02:48,991 INFO L124 PetriNetUnfolderBase]: 18/62 cut-off events. [2024-11-16 19:02:48,991 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-16 19:02:48,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 62 events. 18/62 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 6 based on Foata normal form. 2/64 useless extension candidates. Maximal degree in co-relation 189. Up to 30 conditions per place. [2024-11-16 19:02:48,992 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 24 selfloop transitions, 8 changer transitions 1/35 dead transitions. [2024-11-16 19:02:48,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 35 transitions, 220 flow [2024-11-16 19:02:48,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-16 19:02:48,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-16 19:02:48,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 88 transitions. [2024-11-16 19:02:48,997 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37606837606837606 [2024-11-16 19:02:48,997 INFO L175 Difference]: Start difference. First operand has 40 places, 26 transitions, 120 flow. Second operand 9 states and 88 transitions. [2024-11-16 19:02:48,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 35 transitions, 220 flow [2024-11-16 19:02:48,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 35 transitions, 202 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-11-16 19:02:49,001 INFO L231 Difference]: Finished difference. Result has 45 places, 28 transitions, 144 flow [2024-11-16 19:02:49,001 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=144, PETRI_PLACES=45, PETRI_TRANSITIONS=28} [2024-11-16 19:02:49,002 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 20 predicate places. [2024-11-16 19:02:49,002 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 28 transitions, 144 flow [2024-11-16 19:02:49,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.8) internal successors, (176), 20 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:02:49,002 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:02:49,003 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:02:49,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-16 19:02:49,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:02:49,207 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:02:49,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:02:49,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1341030074, now seen corresponding path program 4 times [2024-11-16 19:02:49,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:02:49,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090887499] [2024-11-16 19:02:49,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:02:49,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:02:49,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:02:49,442 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:02:49,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:02:49,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090887499] [2024-11-16 19:02:49,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090887499] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:02:49,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111341771] [2024-11-16 19:02:49,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 19:02:49,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:02:49,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:02:49,445 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:02:49,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 19:02:49,531 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 19:02:49,532 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:02:49,533 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-16 19:02:49,534 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:02:49,698 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 15 treesize of output 7 [2024-11-16 19:02:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:02:49,715 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:02:49,840 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:02:49,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111341771] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:02:49,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:02:49,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-11-16 19:02:49,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947750407] [2024-11-16 19:02:49,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:02:49,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-16 19:02:49,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:02:49,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-16 19:02:49,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-11-16 19:02:49,850 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-11-16 19:02:49,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 28 transitions, 144 flow. Second operand has 23 states, 23 states have (on average 8.695652173913043) internal successors, (200), 23 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:02:49,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:02:49,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-11-16 19:02:49,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:02:50,172 INFO L124 PetriNetUnfolderBase]: 20/68 cut-off events. [2024-11-16 19:02:50,174 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2024-11-16 19:02:50,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 68 events. 20/68 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 69 event pairs, 6 based on Foata normal form. 2/70 useless extension candidates. Maximal degree in co-relation 227. Up to 30 conditions per place. [2024-11-16 19:02:50,176 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 26 selfloop transitions, 9 changer transitions 1/38 dead transitions. [2024-11-16 19:02:50,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 38 transitions, 258 flow [2024-11-16 19:02:50,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-16 19:02:50,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-16 19:02:50,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 97 transitions. [2024-11-16 19:02:50,179 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3730769230769231 [2024-11-16 19:02:50,179 INFO L175 Difference]: Start difference. First operand has 45 places, 28 transitions, 144 flow. Second operand 10 states and 97 transitions. [2024-11-16 19:02:50,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 38 transitions, 258 flow [2024-11-16 19:02:50,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 38 transitions, 234 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-16 19:02:50,183 INFO L231 Difference]: Finished difference. Result has 50 places, 30 transitions, 168 flow [2024-11-16 19:02:50,183 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=168, PETRI_PLACES=50, PETRI_TRANSITIONS=30} [2024-11-16 19:02:50,184 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 25 predicate places. [2024-11-16 19:02:50,184 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 30 transitions, 168 flow [2024-11-16 19:02:50,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 8.695652173913043) internal successors, (200), 23 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:02:50,184 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:02:50,185 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:02:50,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-16 19:02:50,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:02:50,389 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:02:50,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:02:50,389 INFO L85 PathProgramCache]: Analyzing trace with hash -2094738973, now seen corresponding path program 5 times [2024-11-16 19:02:50,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:02:50,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767130563] [2024-11-16 19:02:50,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:02:50,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:02:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:02:50,730 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:02:50,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:02:50,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767130563] [2024-11-16 19:02:50,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767130563] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:02:50,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894289718] [2024-11-16 19:02:50,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 19:02:50,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:02:50,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:02:50,733 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:02:50,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 19:02:50,823 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-16 19:02:50,823 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:02:50,825 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-16 19:02:50,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:02:51,010 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 15 treesize of output 7 [2024-11-16 19:02:51,028 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:02:51,029 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:02:51,176 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:02:51,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894289718] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:02:51,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:02:51,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-11-16 19:02:51,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791788232] [2024-11-16 19:02:51,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:02:51,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-16 19:02:51,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:02:51,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-16 19:02:51,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2024-11-16 19:02:51,187 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-11-16 19:02:51,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 30 transitions, 168 flow. Second operand has 26 states, 26 states have (on average 8.615384615384615) internal successors, (224), 26 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:02:51,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:02:51,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-11-16 19:02:51,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:02:51,619 INFO L124 PetriNetUnfolderBase]: 22/74 cut-off events. [2024-11-16 19:02:51,619 INFO L125 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2024-11-16 19:02:51,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 74 events. 22/74 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs, 6 based on Foata normal form. 2/76 useless extension candidates. Maximal degree in co-relation 265. Up to 30 conditions per place. [2024-11-16 19:02:51,622 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 28 selfloop transitions, 10 changer transitions 1/41 dead transitions. [2024-11-16 19:02:51,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 41 transitions, 296 flow [2024-11-16 19:02:51,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-16 19:02:51,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-16 19:02:51,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 106 transitions. [2024-11-16 19:02:51,626 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3706293706293706 [2024-11-16 19:02:51,626 INFO L175 Difference]: Start difference. First operand has 50 places, 30 transitions, 168 flow. Second operand 11 states and 106 transitions. [2024-11-16 19:02:51,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 41 transitions, 296 flow [2024-11-16 19:02:51,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 41 transitions, 266 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-11-16 19:02:51,629 INFO L231 Difference]: Finished difference. Result has 55 places, 32 transitions, 192 flow [2024-11-16 19:02:51,629 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=192, PETRI_PLACES=55, PETRI_TRANSITIONS=32} [2024-11-16 19:02:51,630 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 30 predicate places. [2024-11-16 19:02:51,630 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 32 transitions, 192 flow [2024-11-16 19:02:51,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 8.615384615384615) internal successors, (224), 26 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:02:51,631 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:02:51,631 INFO L204 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:02:51,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-16 19:02:51,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:02:51,832 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:02:51,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:02:51,833 INFO L85 PathProgramCache]: Analyzing trace with hash -559517888, now seen corresponding path program 6 times [2024-11-16 19:02:51,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:02:51,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558702927] [2024-11-16 19:02:51,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:02:51,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:02:51,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:02:52,138 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:02:52,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:02:52,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558702927] [2024-11-16 19:02:52,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558702927] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:02:52,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644919456] [2024-11-16 19:02:52,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-16 19:02:52,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:02:52,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:02:52,141 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:02:52,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-16 19:02:52,231 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-16 19:02:52,231 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:02:52,233 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-16 19:02:52,234 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:02:52,450 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 15 treesize of output 7 [2024-11-16 19:02:52,466 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:02:52,466 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:02:52,648 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:02:52,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644919456] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:02:52,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:02:52,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2024-11-16 19:02:52,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990344427] [2024-11-16 19:02:52,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:02:52,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-16 19:02:52,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:02:52,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-16 19:02:52,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2024-11-16 19:02:52,653 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2024-11-16 19:02:52,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 32 transitions, 192 flow. Second operand has 29 states, 29 states have (on average 8.551724137931034) internal successors, (248), 29 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:02:52,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:02:52,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2024-11-16 19:02:52,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:02:53,075 INFO L124 PetriNetUnfolderBase]: 24/80 cut-off events. [2024-11-16 19:02:53,075 INFO L125 PetriNetUnfolderBase]: For 255/255 co-relation queries the response was YES. [2024-11-16 19:02:53,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333 conditions, 80 events. 24/80 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 83 event pairs, 6 based on Foata normal form. 2/82 useless extension candidates. Maximal degree in co-relation 303. Up to 30 conditions per place. [2024-11-16 19:02:53,076 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 30 selfloop transitions, 11 changer transitions 1/44 dead transitions. [2024-11-16 19:02:53,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 44 transitions, 334 flow [2024-11-16 19:02:53,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-16 19:02:53,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-16 19:02:53,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 115 transitions. [2024-11-16 19:02:53,078 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3685897435897436 [2024-11-16 19:02:53,078 INFO L175 Difference]: Start difference. First operand has 55 places, 32 transitions, 192 flow. Second operand 12 states and 115 transitions. [2024-11-16 19:02:53,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 44 transitions, 334 flow [2024-11-16 19:02:53,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 44 transitions, 298 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-11-16 19:02:53,080 INFO L231 Difference]: Finished difference. Result has 60 places, 34 transitions, 216 flow [2024-11-16 19:02:53,081 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=216, PETRI_PLACES=60, PETRI_TRANSITIONS=34} [2024-11-16 19:02:53,081 INFO L277 CegarLoopForPetriNet]: 25 programPoint places, 35 predicate places. [2024-11-16 19:02:53,081 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 34 transitions, 216 flow [2024-11-16 19:02:53,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 8.551724137931034) internal successors, (248), 29 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:02:53,082 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:02:53,082 INFO L204 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:02:53,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-16 19:02:53,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:02:53,287 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:02:53,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:02:53,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1614162269, now seen corresponding path program 7 times [2024-11-16 19:02:53,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:02:53,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253207772] [2024-11-16 19:02:53,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:02:53,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:02:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:02:54,520 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 20 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:02:54,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:02:54,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253207772] [2024-11-16 19:02:54,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253207772] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:02:54,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500726576] [2024-11-16 19:02:54,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-16 19:02:54,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:02:54,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:02:54,524 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:02:54,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-16 19:02:54,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:02:54,608 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-16 19:02:54,612 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:02:54,692 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 11 treesize of output 7 [2024-11-16 19:02:54,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-16 19:02:54,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-16 19:02:54,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-16 19:02:54,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 19:02:54,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-16 19:02:55,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 19:02:55,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-16 19:02:55,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 19:02:55,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-16 19:02:55,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 19:02:55,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-16 19:02:55,224 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 9 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:02:55,225 INFO L311 TraceCheckSpWp]: Computing backward predicates...