./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/stack_longest-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/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 ../../../trunk/examples/svcomp/pthread/stack_longest-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 529fe0895c01c52d9b18b51c32204a307faf547c0c07b22bc1a431308affcf90 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:23:28,970 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:23:29,035 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:23:29,039 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:23:29,039 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:23:29,191 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:23:29,192 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:23:29,192 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:23:29,192 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:23:29,193 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:23:29,193 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:23:29,193 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:23:29,194 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:23:29,194 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:23:29,194 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:23:29,195 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:23:29,195 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:23:29,195 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:23:29,196 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:23:29,196 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:23:29,196 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:23:29,197 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:23:29,197 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:23:29,197 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:23:29,198 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:23:29,198 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:23:29,198 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:23:29,198 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:23:29,199 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:23:29,199 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:23:29,199 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:23:29,200 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:23:29,200 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:23:29,200 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:23:29,201 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:23:29,201 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:23:29,201 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:23:29,201 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:23:29,201 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:23:29,202 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:23:29,202 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:23:29,202 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:23:29,202 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:23:29,203 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 529fe0895c01c52d9b18b51c32204a307faf547c0c07b22bc1a431308affcf90 [2024-06-27 17:23:29,352 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:23:29,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:23:29,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:23:29,382 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:23:29,382 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:23:29,383 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-1.i [2024-06-27 17:23:30,431 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:23:30,624 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:23:30,624 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-1.i [2024-06-27 17:23:30,643 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e69a02f90/23a7bafda2c4481eac69fe5c67aa46e4/FLAG6ba9a2dcd [2024-06-27 17:23:30,652 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e69a02f90/23a7bafda2c4481eac69fe5c67aa46e4 [2024-06-27 17:23:30,654 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:23:30,655 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 17:23:30,656 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:23:30,656 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:23:30,660 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:23:30,660 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:23:30" (1/1) ... [2024-06-27 17:23:30,661 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58e28255 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:23:30, skipping insertion in model container [2024-06-27 17:23:30,661 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:23:30" (1/1) ... [2024-06-27 17:23:30,697 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:23:31,054 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-1.i[41530,41543] [2024-06-27 17:23:31,081 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:23:31,089 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 17:23:31,125 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-1.i[41530,41543] [2024-06-27 17:23:31,147 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:23:31,235 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:23:31,236 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:23:31 WrapperNode [2024-06-27 17:23:31,236 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:23:31,237 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:23:31,237 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:23:31,237 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:23:31,242 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:23:31" (1/1) ... [2024-06-27 17:23:31,267 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:23:31" (1/1) ... [2024-06-27 17:23:31,297 INFO L138 Inliner]: procedures = 277, calls = 31, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 153 [2024-06-27 17:23:31,298 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:23:31,298 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:23:31,299 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:23:31,299 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:23:31,307 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:23:31" (1/1) ... [2024-06-27 17:23:31,308 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:23:31" (1/1) ... [2024-06-27 17:23:31,321 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:23:31" (1/1) ... [2024-06-27 17:23:31,338 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 5, 3]. 50 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 2 writes are split as follows [0, 0, 2]. [2024-06-27 17:23:31,340 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:23:31" (1/1) ... [2024-06-27 17:23:31,340 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:23:31" (1/1) ... [2024-06-27 17:23:31,348 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:23:31" (1/1) ... [2024-06-27 17:23:31,354 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:23:31" (1/1) ... [2024-06-27 17:23:31,360 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:23:31" (1/1) ... [2024-06-27 17:23:31,362 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:23:31" (1/1) ... [2024-06-27 17:23:31,364 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:23:31,366 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:23:31,366 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:23:31,366 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:23:31,367 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:23:31" (1/1) ... [2024-06-27 17:23:31,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:23:31,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:23:31,406 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) [2024-06-27 17:23:31,425 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 [2024-06-27 17:23:31,444 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-06-27 17:23:31,444 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-06-27 17:23:31,445 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-06-27 17:23:31,445 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-06-27 17:23:31,445 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-06-27 17:23:31,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 17:23:31,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 17:23:31,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-06-27 17:23:31,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 17:23:31,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 17:23:31,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-06-27 17:23:31,446 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-06-27 17:23:31,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:23:31,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:23:31,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 17:23:31,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-06-27 17:23:31,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:23:31,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:23:31,448 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 17:23:31,568 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:23:31,570 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:23:31,759 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:23:31,759 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:23:31,886 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:23:31,888 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-06-27 17:23:31,888 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:23:31 BoogieIcfgContainer [2024-06-27 17:23:31,888 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:23:31,891 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:23:31,892 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:23:31,895 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:23:31,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:23:30" (1/3) ... [2024-06-27 17:23:31,895 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cc8bac5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:23:31, skipping insertion in model container [2024-06-27 17:23:31,896 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:23:31" (2/3) ... [2024-06-27 17:23:31,897 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cc8bac5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:23:31, skipping insertion in model container [2024-06-27 17:23:31,897 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:23:31" (3/3) ... [2024-06-27 17:23:31,898 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-1.i [2024-06-27 17:23:31,904 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 17:23:31,911 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:23:31,912 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-27 17:23:31,912 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:23:31,974 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 17:23:32,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 35 transitions, 84 flow [2024-06-27 17:23:32,040 INFO L124 PetriNetUnfolderBase]: 5/33 cut-off events. [2024-06-27 17:23:32,040 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 17:23:32,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 5/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 66 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 30. Up to 3 conditions per place. [2024-06-27 17:23:32,044 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 35 transitions, 84 flow [2024-06-27 17:23:32,049 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 31 transitions, 71 flow [2024-06-27 17:23:32,062 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:23:32,068 INFO L357 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, mHoare=true, 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;@42080ee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:23:32,068 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 17:23:32,076 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:23:32,077 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2024-06-27 17:23:32,077 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-06-27 17:23:32,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:23:32,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:23:32,078 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-06-27 17:23:32,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:23:32,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1494446747, now seen corresponding path program 1 times [2024-06-27 17:23:32,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:23:32,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299392649] [2024-06-27 17:23:32,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:23:32,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:23:32,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:23:32,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:23:32,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:23:32,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299392649] [2024-06-27 17:23:32,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299392649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:23:32,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:23:32,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:23:32,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210598707] [2024-06-27 17:23:32,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:23:32,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:23:32,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:23:32,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:23:32,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:23:32,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-06-27 17:23:32,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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) [2024-06-27 17:23:32,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:23:32,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-06-27 17:23:32,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:23:32,629 INFO L124 PetriNetUnfolderBase]: 342/656 cut-off events. [2024-06-27 17:23:32,629 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2024-06-27 17:23:32,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1268 conditions, 656 events. 342/656 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2999 event pairs, 75 based on Foata normal form. 44/653 useless extension candidates. Maximal degree in co-relation 1176. Up to 358 conditions per place. [2024-06-27 17:23:32,635 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 46 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2024-06-27 17:23:32,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 56 transitions, 228 flow [2024-06-27 17:23:32,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:23:32,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:23:32,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-06-27 17:23:32,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-27 17:23:32,646 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 71 flow. Second operand 4 states and 90 transitions. [2024-06-27 17:23:32,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 56 transitions, 228 flow [2024-06-27 17:23:32,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 56 transitions, 219 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 17:23:32,650 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 82 flow [2024-06-27 17:23:32,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=82, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2024-06-27 17:23:32,654 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 2 predicate places. [2024-06-27 17:23:32,655 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 82 flow [2024-06-27 17:23:32,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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) [2024-06-27 17:23:32,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:23:32,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:23:32,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:23:32,656 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-06-27 17:23:32,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:23:32,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1962996839, now seen corresponding path program 1 times [2024-06-27 17:23:32,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:23:32,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053360936] [2024-06-27 17:23:32,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:23:32,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:23:32,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:23:32,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:23:32,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:23:32,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053360936] [2024-06-27 17:23:32,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053360936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:23:32,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:23:32,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 17:23:32,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089624701] [2024-06-27 17:23:32,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:23:32,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:23:32,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:23:32,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:23:32,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:23:32,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2024-06-27 17:23:32,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2024-06-27 17:23:32,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:23:32,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2024-06-27 17:23:32,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:23:32,816 INFO L124 PetriNetUnfolderBase]: 341/640 cut-off events. [2024-06-27 17:23:32,817 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-06-27 17:23:32,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1348 conditions, 640 events. 341/640 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2798 event pairs, 128 based on Foata normal form. 10/609 useless extension candidates. Maximal degree in co-relation 989. Up to 398 conditions per place. [2024-06-27 17:23:32,821 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 33 selfloop transitions, 2 changer transitions 2/43 dead transitions. [2024-06-27 17:23:32,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 43 transitions, 183 flow [2024-06-27 17:23:32,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:23:32,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:23:32,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2024-06-27 17:23:32,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5904761904761905 [2024-06-27 17:23:32,824 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 82 flow. Second operand 3 states and 62 transitions. [2024-06-27 17:23:32,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 43 transitions, 183 flow [2024-06-27 17:23:32,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 43 transitions, 181 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:23:32,828 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 92 flow [2024-06-27 17:23:32,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2024-06-27 17:23:32,829 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 4 predicate places. [2024-06-27 17:23:32,829 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 92 flow [2024-06-27 17:23:32,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2024-06-27 17:23:32,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:23:32,830 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:23:32,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 17:23:32,831 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-06-27 17:23:32,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:23:32,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1866393854, now seen corresponding path program 1 times [2024-06-27 17:23:32,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:23:32,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970366480] [2024-06-27 17:23:32,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:23:32,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:23:32,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:23:33,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:23:33,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:23:33,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970366480] [2024-06-27 17:23:33,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970366480] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:23:33,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373926014] [2024-06-27 17:23:33,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:23:33,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:23:33,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:23:33,029 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) [2024-06-27 17:23:33,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 17:23:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:23:33,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2024-06-27 17:23:33,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:23:33,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-27 17:23:33,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:23:33,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:23:33,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:23:33,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373926014] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:23:33,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:23:33,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-06-27 17:23:33,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725481180] [2024-06-27 17:23:33,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:23:33,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 17:23:33,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:23:33,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 17:23:33,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-27 17:23:33,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-06-27 17:23:33,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 92 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 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) [2024-06-27 17:23:33,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:23:33,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-06-27 17:23:33,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:23:33,983 INFO L124 PetriNetUnfolderBase]: 1030/1975 cut-off events. [2024-06-27 17:23:33,984 INFO L125 PetriNetUnfolderBase]: For 193/193 co-relation queries the response was YES. [2024-06-27 17:23:33,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4120 conditions, 1975 events. 1030/1975 cut-off events. For 193/193 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 10216 event pairs, 79 based on Foata normal form. 0/1880 useless extension candidates. Maximal degree in co-relation 3565. Up to 390 conditions per place. [2024-06-27 17:23:33,995 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 137 selfloop transitions, 18 changer transitions 2/165 dead transitions. [2024-06-27 17:23:33,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 165 transitions, 729 flow [2024-06-27 17:23:33,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:23:33,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:23:33,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 269 transitions. [2024-06-27 17:23:33,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6404761904761904 [2024-06-27 17:23:33,998 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 92 flow. Second operand 12 states and 269 transitions. [2024-06-27 17:23:33,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 165 transitions, 729 flow [2024-06-27 17:23:33,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 165 transitions, 727 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:23:34,001 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 237 flow [2024-06-27 17:23:34,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=237, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2024-06-27 17:23:34,002 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 19 predicate places. [2024-06-27 17:23:34,002 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 237 flow [2024-06-27 17:23:34,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 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) [2024-06-27 17:23:34,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:23:34,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:23:34,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-27 17:23:34,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:23:34,217 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-06-27 17:23:34,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:23:34,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1687165316, now seen corresponding path program 1 times [2024-06-27 17:23:34,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:23:34,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710682277] [2024-06-27 17:23:34,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:23:34,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:23:34,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:23:34,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:23:34,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:23:34,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710682277] [2024-06-27 17:23:34,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710682277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:23:34,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:23:34,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:23:34,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690597912] [2024-06-27 17:23:34,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:23:34,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 17:23:34,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:23:34,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 17:23:34,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 17:23:34,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-06-27 17:23:34,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 237 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2024-06-27 17:23:34,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:23:34,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-06-27 17:23:34,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:23:34,402 INFO L124 PetriNetUnfolderBase]: 593/1233 cut-off events. [2024-06-27 17:23:34,403 INFO L125 PetriNetUnfolderBase]: For 452/452 co-relation queries the response was YES. [2024-06-27 17:23:34,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2781 conditions, 1233 events. 593/1233 cut-off events. For 452/452 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 5827 event pairs, 204 based on Foata normal form. 60/1278 useless extension candidates. Maximal degree in co-relation 2654. Up to 580 conditions per place. [2024-06-27 17:23:34,408 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 42 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2024-06-27 17:23:34,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 54 transitions, 309 flow [2024-06-27 17:23:34,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 17:23:34,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 17:23:34,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-06-27 17:23:34,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2024-06-27 17:23:34,409 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 237 flow. Second operand 3 states and 61 transitions. [2024-06-27 17:23:34,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 54 transitions, 309 flow [2024-06-27 17:23:34,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 54 transitions, 285 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 17:23:34,417 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 178 flow [2024-06-27 17:23:34,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-06-27 17:23:34,418 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 17 predicate places. [2024-06-27 17:23:34,419 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 178 flow [2024-06-27 17:23:34,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2024-06-27 17:23:34,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:23:34,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:23:34,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:23:34,419 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-06-27 17:23:34,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:23:34,420 INFO L85 PathProgramCache]: Analyzing trace with hash -2116396171, now seen corresponding path program 1 times [2024-06-27 17:23:34,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:23:34,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649641206] [2024-06-27 17:23:34,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:23:34,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:23:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:23:34,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:23:34,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:23:34,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649641206] [2024-06-27 17:23:34,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649641206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:23:34,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:23:34,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 17:23:34,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598898580] [2024-06-27 17:23:34,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:23:34,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 17:23:34,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:23:34,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 17:23:34,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 17:23:34,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-06-27 17:23:34,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 178 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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) [2024-06-27 17:23:34,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:23:34,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-06-27 17:23:34,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:23:34,993 INFO L124 PetriNetUnfolderBase]: 653/1346 cut-off events. [2024-06-27 17:23:34,993 INFO L125 PetriNetUnfolderBase]: For 503/503 co-relation queries the response was YES. [2024-06-27 17:23:34,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3122 conditions, 1346 events. 653/1346 cut-off events. For 503/503 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 6575 event pairs, 145 based on Foata normal form. 0/1326 useless extension candidates. Maximal degree in co-relation 2726. Up to 840 conditions per place. [2024-06-27 17:23:34,999 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 60 selfloop transitions, 5 changer transitions 2/75 dead transitions. [2024-06-27 17:23:34,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 75 transitions, 402 flow [2024-06-27 17:23:35,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:23:35,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:23:35,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-06-27 17:23:35,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5771428571428572 [2024-06-27 17:23:35,006 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 178 flow. Second operand 5 states and 101 transitions. [2024-06-27 17:23:35,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 75 transitions, 402 flow [2024-06-27 17:23:35,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 391 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 17:23:35,010 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 210 flow [2024-06-27 17:23:35,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=210, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-27 17:23:35,012 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 22 predicate places. [2024-06-27 17:23:35,012 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 210 flow [2024-06-27 17:23:35,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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) [2024-06-27 17:23:35,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:23:35,012 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:23:35,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 17:23:35,013 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-06-27 17:23:35,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:23:35,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1881439538, now seen corresponding path program 1 times [2024-06-27 17:23:35,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:23:35,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832249273] [2024-06-27 17:23:35,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:23:35,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:23:35,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:23:35,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:23:35,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:23:35,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832249273] [2024-06-27 17:23:35,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832249273] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:23:35,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092365245] [2024-06-27 17:23:35,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:23:35,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:23:35,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:23:35,340 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) [2024-06-27 17:23:35,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 17:23:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:23:35,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 11 conjunts are in the unsatisfiable core [2024-06-27 17:23:35,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:23:35,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-06-27 17:23:35,475 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 19 treesize of output 1 [2024-06-27 17:23:35,519 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 68 treesize of output 32 [2024-06-27 17:23:35,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:23:35,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:23:35,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2024-06-27 17:23:35,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:23:35,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092365245] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:23:35,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:23:35,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-06-27 17:23:35,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525131844] [2024-06-27 17:23:35,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:23:35,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 17:23:35,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:23:35,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 17:23:35,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-06-27 17:23:35,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2024-06-27 17:23:35,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 210 flow. Second operand has 13 states, 13 states have (on average 12.615384615384615) internal successors, (164), 13 states have internal predecessors, (164), 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) [2024-06-27 17:23:35,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:23:35,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2024-06-27 17:23:35,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:23:36,465 INFO L124 PetriNetUnfolderBase]: 1212/2509 cut-off events. [2024-06-27 17:23:36,466 INFO L125 PetriNetUnfolderBase]: For 1204/1204 co-relation queries the response was YES. [2024-06-27 17:23:36,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5750 conditions, 2509 events. 1212/2509 cut-off events. For 1204/1204 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 13666 event pairs, 231 based on Foata normal form. 0/2477 useless extension candidates. Maximal degree in co-relation 4658. Up to 384 conditions per place. [2024-06-27 17:23:36,477 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 136 selfloop transitions, 27 changer transitions 0/171 dead transitions. [2024-06-27 17:23:36,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 171 transitions, 952 flow [2024-06-27 17:23:36,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 17:23:36,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 17:23:36,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 257 transitions. [2024-06-27 17:23:36,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.611904761904762 [2024-06-27 17:23:36,479 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 210 flow. Second operand 12 states and 257 transitions. [2024-06-27 17:23:36,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 171 transitions, 952 flow [2024-06-27 17:23:36,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 171 transitions, 947 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 17:23:36,485 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 376 flow [2024-06-27 17:23:36,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=376, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2024-06-27 17:23:36,486 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 34 predicate places. [2024-06-27 17:23:36,486 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 376 flow [2024-06-27 17:23:36,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.615384615384615) internal successors, (164), 13 states have internal predecessors, (164), 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) [2024-06-27 17:23:36,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:23:36,486 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:23:36,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-06-27 17:23:36,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-06-27 17:23:36,698 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-06-27 17:23:36,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:23:36,698 INFO L85 PathProgramCache]: Analyzing trace with hash 240433132, now seen corresponding path program 1 times [2024-06-27 17:23:36,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:23:36,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877017795] [2024-06-27 17:23:36,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:23:36,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:23:36,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 17:23:36,729 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 17:23:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 17:23:36,772 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 17:23:36,773 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 17:23:36,774 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2024-06-27 17:23:36,776 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2024-06-27 17:23:36,776 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2024-06-27 17:23:36,777 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-06-27 17:23:36,777 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-06-27 17:23:36,777 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-06-27 17:23:36,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 17:23:36,778 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:23:36,783 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-27 17:23:36,783 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-27 17:23:36,843 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.06 05:23:36 BasicIcfg [2024-06-27 17:23:36,846 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-27 17:23:36,847 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-06-27 17:23:36,847 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-06-27 17:23:36,847 INFO L274 PluginConnector]: Witness Printer initialized [2024-06-27 17:23:36,847 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:23:31" (3/4) ... [2024-06-27 17:23:36,848 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2024-06-27 17:23:36,925 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-06-27 17:23:36,926 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-06-27 17:23:36,926 INFO L158 Benchmark]: Toolchain (without parser) took 6270.99ms. Allocated memory was 180.4MB in the beginning and 335.5MB in the end (delta: 155.2MB). Free memory was 102.8MB in the beginning and 138.0MB in the end (delta: -35.2MB). Peak memory consumption was 120.7MB. Max. memory is 16.1GB. [2024-06-27 17:23:36,927 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 180.4MB. Free memory is still 131.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 17:23:36,927 INFO L158 Benchmark]: CACSL2BoogieTranslator took 580.13ms. Allocated memory was 180.4MB in the beginning and 266.3MB in the end (delta: 86.0MB). Free memory was 102.6MB in the beginning and 225.3MB in the end (delta: -122.7MB). Peak memory consumption was 38.6MB. Max. memory is 16.1GB. [2024-06-27 17:23:36,927 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.06ms. Allocated memory is still 266.3MB. Free memory was 225.3MB in the beginning and 222.1MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 17:23:36,927 INFO L158 Benchmark]: Boogie Preprocessor took 66.90ms. Allocated memory is still 266.3MB. Free memory was 222.1MB in the beginning and 220.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 17:23:36,928 INFO L158 Benchmark]: RCFGBuilder took 522.72ms. Allocated memory is still 266.3MB. Free memory was 220.0MB in the beginning and 178.1MB in the end (delta: 41.9MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. [2024-06-27 17:23:36,928 INFO L158 Benchmark]: TraceAbstraction took 4955.07ms. Allocated memory was 266.3MB in the beginning and 335.5MB in the end (delta: 69.2MB). Free memory was 177.0MB in the beginning and 145.3MB in the end (delta: 31.7MB). Peak memory consumption was 100.9MB. Max. memory is 16.1GB. [2024-06-27 17:23:36,928 INFO L158 Benchmark]: Witness Printer took 79.14ms. Allocated memory is still 335.5MB. Free memory was 145.3MB in the beginning and 138.0MB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2024-06-27 17:23:36,931 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 180.4MB. Free memory is still 131.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 580.13ms. Allocated memory was 180.4MB in the beginning and 266.3MB in the end (delta: 86.0MB). Free memory was 102.6MB in the beginning and 225.3MB in the end (delta: -122.7MB). Peak memory consumption was 38.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.06ms. Allocated memory is still 266.3MB. Free memory was 225.3MB in the beginning and 222.1MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 66.90ms. Allocated memory is still 266.3MB. Free memory was 222.1MB in the beginning and 220.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 522.72ms. Allocated memory is still 266.3MB. Free memory was 220.0MB in the beginning and 178.1MB in the end (delta: 41.9MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. * TraceAbstraction took 4955.07ms. Allocated memory was 266.3MB in the beginning and 335.5MB in the end (delta: 69.2MB). Free memory was 177.0MB in the beginning and 145.3MB in the end (delta: 31.7MB). Peak memory consumption was 100.9MB. Max. memory is 16.1GB. * Witness Printer took 79.14ms. Allocated memory is still 335.5MB. Free memory was 145.3MB in the beginning and 138.0MB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 941]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(800)]; [L936] 0 static unsigned int arr[(800)]; [L937] 0 pthread_mutex_t m; [L937] 0 pthread_mutex_t m; [L937] 0 pthread_mutex_t m; [L937] 0 pthread_mutex_t m; [L937] 0 pthread_mutex_t m; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1020] 0 pthread_t id1, id2; [L1022] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1=0, m={4:0}, top=0] [L989] 1 int i; [L990] 1 unsigned int tmp; [L991] 1 i=0 VAL [\old(arg)={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L991] COND TRUE 1 i<(800) VAL [\old(arg)={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1023] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1=0, id2=1, m={4:0}, top=0] [L1005] 2 int i; [L1006] 2 i=0 VAL [\old(arg)={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L994] 1 tmp = __VERIFIER_nondet_uint() [L995] CALL 1 assume_abort_if_not(tmp < (800)) [L23] COND FALSE 1 !(!cond) [L995] RET 1 assume_abort_if_not(tmp < (800)) [L996] CALL, EXPR 1 push(arr,tmp) [L961] COND FALSE 1 !(top==(800)) [L968] CALL, EXPR 1 get_top() [L953] 1 return top; [L968] RET, EXPR 1 get_top() [L968] 1 stack[get_top()] = x [L969] CALL 1 inc_top() [L945] 1 top++ [L969] RET 1 inc_top() [L971] 1 return 0; [L996] RET, EXPR 1 push(arr,tmp) [L996] COND FALSE 1 !(push(arr,tmp)==(-1)) [L998] 1 flag=(1) VAL [\old(arg)={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=0, top=1] [L1006] COND TRUE 2 i<(800) VAL [\old(arg)={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, top=1] [L1009] COND TRUE 2 \read(flag) [L1011] CALL, EXPR 2 pop(arr) [L975] CALL, EXPR 2 get_top() [L953] 2 return top; [L975] RET, EXPR 2 get_top() [L975] COND FALSE 2 !(get_top()==0) [L982] CALL 2 dec_top() [L949] 2 top-- [L982] RET 2 dec_top() [L983] CALL, EXPR 2 get_top() [L953] 2 return top; [L983] RET, EXPR 2 get_top() [L983] EXPR 2 stack[get_top()] [L983] 2 return stack[get_top()]; [L1011] RET, EXPR 2 pop(arr) [L1011] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1006] 2 i++ VAL [\old(arg)={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1006] COND TRUE 2 i<(800) VAL [\old(arg)={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1009] COND TRUE 2 \read(flag) [L1011] CALL, EXPR 2 pop(arr) [L975] CALL, EXPR 2 get_top() [L953] 2 return top; [L975] RET, EXPR 2 get_top() [L975] COND TRUE 2 get_top()==0 [L978] 2 return (-2); [L1011] RET, EXPR 2 pop(arr) [L1011] COND TRUE 2 !(pop(arr)!=(-2)) [L1012] CALL 2 error() [L941] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: 1023]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 941]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 55 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.8s, OverallIterations: 7, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 512 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 508 mSDsluCounter, 2 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 32 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 890 IncrementalHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 32 mSolverCounterUnsat, 2 mSDtfsCounter, 890 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 106 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=376occurred in iteration=6, InterpolantAutomatonStates: 39, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 159 NumberOfCodeBlocks, 159 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 164 ConstructedInterpolants, 7 QuantifiedInterpolants, 1826 SizeOfPredicates, 21 NumberOfNonLiveVariables, 295 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 0/30 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-06-27 17:23:36,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE