./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.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-ext/26_stack_cas_longest-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7f7f7b6ea5abe354543dc816b244a5041021350ff4076c6fd52a8208b97eac31 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:20:50,043 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:20:50,089 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:20:50,094 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:20:50,096 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:20:50,118 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:20:50,118 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:20:50,119 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:20:50,119 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:20:50,119 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:20:50,120 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:20:50,120 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:20:50,121 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:20:50,121 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:20:50,121 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:20:50,122 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:20:50,122 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:20:50,122 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:20:50,122 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:20:50,123 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:20:50,123 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:20:50,123 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:20:50,124 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:20:50,124 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:20:50,124 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:20:50,125 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:20:50,125 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:20:50,125 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:20:50,125 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:20:50,126 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:20:50,126 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:20:50,126 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:20:50,126 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:20:50,127 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:20:50,127 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:20:50,127 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:20:50,127 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:20:50,128 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:20:50,128 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:20:50,128 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:20:50,128 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:20:50,128 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:20:50,129 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:20:50,129 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f7f7b6ea5abe354543dc816b244a5041021350ff4076c6fd52a8208b97eac31 [2024-06-27 16:20:50,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:20:50,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:20:50,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:20:50,431 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:20:50,431 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:20:50,432 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i [2024-06-27 16:20:51,554 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:20:51,799 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:20:51,800 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i [2024-06-27 16:20:51,812 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1002dfd17/726f0868d6f94571a828815384e6821c/FLAGa0297b5ee [2024-06-27 16:20:51,822 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1002dfd17/726f0868d6f94571a828815384e6821c [2024-06-27 16:20:51,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:20:51,825 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:20:51,826 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:20:51,827 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:20:51,835 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:20:51,838 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:20:51" (1/1) ... [2024-06-27 16:20:51,838 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e9c1aa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:20:51, skipping insertion in model container [2024-06-27 16:20:51,839 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:20:51" (1/1) ... [2024-06-27 16:20:51,880 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:20:52,202 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-ext/26_stack_cas_longest-2.i[31306,31319] [2024-06-27 16:20:52,215 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:20:52,232 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:20:52,277 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-ext/26_stack_cas_longest-2.i[31306,31319] [2024-06-27 16:20:52,280 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:20:52,318 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:20:52,319 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:20:52 WrapperNode [2024-06-27 16:20:52,319 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:20:52,321 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:20:52,321 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:20:52,321 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:20:52,327 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:20:52" (1/1) ... [2024-06-27 16:20:52,340 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:20:52" (1/1) ... [2024-06-27 16:20:52,365 INFO L138 Inliner]: procedures = 179, calls = 46, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 188 [2024-06-27 16:20:52,366 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:20:52,367 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:20:52,367 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:20:52,367 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:20:52,376 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:20:52" (1/1) ... [2024-06-27 16:20:52,377 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:20:52" (1/1) ... [2024-06-27 16:20:52,396 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:20:52" (1/1) ... [2024-06-27 16:20:52,423 INFO L175 MemorySlicer]: Split 24 memory accesses to 4 slices as follows [2, 4, 12, 6]. 50 percent of accesses are in the largest equivalence class. The 6 initializations are split as follows [2, 1, 2, 1]. The 9 writes are split as follows [0, 2, 5, 2]. [2024-06-27 16:20:52,424 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:20:52" (1/1) ... [2024-06-27 16:20:52,424 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:20:52" (1/1) ... [2024-06-27 16:20:52,436 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:20:52" (1/1) ... [2024-06-27 16:20:52,447 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:20:52" (1/1) ... [2024-06-27 16:20:52,449 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:20:52" (1/1) ... [2024-06-27 16:20:52,450 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:20:52" (1/1) ... [2024-06-27 16:20:52,453 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:20:52,454 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:20:52,454 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:20:52,454 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:20:52,454 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:20:52" (1/1) ... [2024-06-27 16:20:52,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:20:52,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:20:52,485 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 16:20:52,488 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 16:20:52,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 16:20:52,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 16:20:52,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-06-27 16:20:52,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-06-27 16:20:52,525 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-06-27 16:20:52,525 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-06-27 16:20:52,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 16:20:52,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 16:20:52,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-06-27 16:20:52,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-06-27 16:20:52,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 16:20:52,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:20:52,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-06-27 16:20:52,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-06-27 16:20:52,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:20:52,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 16:20:52,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-06-27 16:20:52,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-06-27 16:20:52,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 16:20:52,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:20:52,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:20:52,528 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 16:20:52,730 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:20:52,732 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:20:53,033 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:20:53,033 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:20:53,204 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:20:53,205 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-06-27 16:20:53,206 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:20:53 BoogieIcfgContainer [2024-06-27 16:20:53,206 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:20:53,208 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:20:53,208 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:20:53,210 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:20:53,210 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:20:51" (1/3) ... [2024-06-27 16:20:53,211 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b200f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:20:53, skipping insertion in model container [2024-06-27 16:20:53,211 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:20:52" (2/3) ... [2024-06-27 16:20:53,212 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b200f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:20:53, skipping insertion in model container [2024-06-27 16:20:53,212 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:20:53" (3/3) ... [2024-06-27 16:20:53,213 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longest-2.i [2024-06-27 16:20:53,220 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:20:53,227 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:20:53,228 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 16:20:53,228 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:20:53,287 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 16:20:53,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 36 transitions, 76 flow [2024-06-27 16:20:53,332 INFO L124 PetriNetUnfolderBase]: 6/38 cut-off events. [2024-06-27 16:20:53,332 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 16:20:53,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 38 events. 6/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 29 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2024-06-27 16:20:53,334 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 36 transitions, 76 flow [2024-06-27 16:20:53,337 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 36 transitions, 76 flow [2024-06-27 16:20:53,343 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:20:53,348 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;@5f137924, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:20:53,349 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-06-27 16:20:53,352 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:20:53,352 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2024-06-27 16:20:53,352 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 16:20:53,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:20:53,353 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-06-27 16:20:53,353 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-06-27 16:20:53,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:20:53,357 INFO L85 PathProgramCache]: Analyzing trace with hash 88755125, now seen corresponding path program 1 times [2024-06-27 16:20:53,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:20:53,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531714050] [2024-06-27 16:20:53,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:20:53,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:20:53,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:20:53,442 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 16:20:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:20:53,468 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 16:20:53,470 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 16:20:53,471 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-06-27 16:20:53,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-06-27 16:20:53,473 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-06-27 16:20:53,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:20:53,474 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-06-27 16:20:53,476 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 16:20:53,476 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-06-27 16:20:53,516 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 16:20:53,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 67 transitions, 144 flow [2024-06-27 16:20:53,578 INFO L124 PetriNetUnfolderBase]: 12/72 cut-off events. [2024-06-27 16:20:53,580 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:20:53,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 72 events. 12/72 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 130 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 63. Up to 3 conditions per place. [2024-06-27 16:20:53,582 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 67 transitions, 144 flow [2024-06-27 16:20:53,584 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 67 transitions, 144 flow [2024-06-27 16:20:53,586 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:20:53,587 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;@5f137924, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:20:53,587 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-27 16:20:53,595 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:20:53,595 INFO L124 PetriNetUnfolderBase]: 1/23 cut-off events. [2024-06-27 16:20:53,596 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-06-27 16:20:53,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:20:53,596 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-06-27 16:20:53,596 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-06-27 16:20:53,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:20:53,597 INFO L85 PathProgramCache]: Analyzing trace with hash 539980568, now seen corresponding path program 1 times [2024-06-27 16:20:53,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:20:53,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047697148] [2024-06-27 16:20:53,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:20:53,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:20:53,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:20:53,626 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 16:20:53,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:20:53,641 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 16:20:53,641 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 16:20:53,641 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-06-27 16:20:53,642 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-06-27 16:20:53,642 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-06-27 16:20:53,642 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-06-27 16:20:53,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 16:20:53,643 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-06-27 16:20:53,643 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 16:20:53,643 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-06-27 16:20:53,697 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 16:20:53,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 98 transitions, 214 flow [2024-06-27 16:20:53,716 INFO L124 PetriNetUnfolderBase]: 18/106 cut-off events. [2024-06-27 16:20:53,717 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-06-27 16:20:53,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 106 events. 18/106 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 276 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2024-06-27 16:20:53,718 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 98 transitions, 214 flow [2024-06-27 16:20:53,720 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 98 transitions, 214 flow [2024-06-27 16:20:53,721 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:20:53,721 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;@5f137924, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:20:53,722 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 16:20:53,728 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:20:53,728 INFO L124 PetriNetUnfolderBase]: 2/38 cut-off events. [2024-06-27 16:20:53,728 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-06-27 16:20:53,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:20:53,729 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-06-27 16:20:53,729 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 16:20:53,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:20:53,729 INFO L85 PathProgramCache]: Analyzing trace with hash 779248020, now seen corresponding path program 1 times [2024-06-27 16:20:53,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:20:53,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292427247] [2024-06-27 16:20:53,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:20:53,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:20:53,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:20:53,745 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 16:20:53,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:20:53,760 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 16:20:53,761 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 16:20:53,761 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-06-27 16:20:53,761 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-06-27 16:20:53,762 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-06-27 16:20:53,762 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-06-27 16:20:53,762 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-06-27 16:20:53,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 16:20:53,762 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-06-27 16:20:53,763 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 16:20:53,763 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-06-27 16:20:53,824 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 16:20:53,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 129 transitions, 286 flow [2024-06-27 16:20:53,847 INFO L124 PetriNetUnfolderBase]: 24/140 cut-off events. [2024-06-27 16:20:53,847 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-06-27 16:20:53,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 140 events. 24/140 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 429 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 123. Up to 5 conditions per place. [2024-06-27 16:20:53,849 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 129 transitions, 286 flow [2024-06-27 16:20:53,851 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 129 transitions, 286 flow [2024-06-27 16:20:53,852 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:20:53,852 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;@5f137924, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:20:53,853 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 16:20:53,861 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:20:53,861 INFO L124 PetriNetUnfolderBase]: 4/61 cut-off events. [2024-06-27 16:20:53,861 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-06-27 16:20:53,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:20:53,861 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2024-06-27 16:20:53,862 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-06-27 16:20:53,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:20:53,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1153351818, now seen corresponding path program 1 times [2024-06-27 16:20:53,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:20:53,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192800144] [2024-06-27 16:20:53,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:20:53,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:20:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:20:53,879 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 16:20:53,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 16:20:53,893 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 16:20:53,894 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 16:20:53,894 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-06-27 16:20:53,894 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-06-27 16:20:53,894 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2024-06-27 16:20:53,894 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-06-27 16:20:53,895 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-06-27 16:20:53,895 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-06-27 16:20:53,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 16:20:53,895 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-06-27 16:20:53,896 WARN L234 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 16:20:53,896 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-06-27 16:20:53,981 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 16:20:53,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 160 transitions, 360 flow [2024-06-27 16:20:54,004 INFO L124 PetriNetUnfolderBase]: 30/174 cut-off events. [2024-06-27 16:20:54,005 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-06-27 16:20:54,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 174 events. 30/174 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 578 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 158. Up to 6 conditions per place. [2024-06-27 16:20:54,007 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 160 transitions, 360 flow [2024-06-27 16:20:54,009 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 160 transitions, 360 flow [2024-06-27 16:20:54,010 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:20:54,010 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;@5f137924, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:20:54,010 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 16:20:54,018 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:20:54,018 INFO L124 PetriNetUnfolderBase]: 7/77 cut-off events. [2024-06-27 16:20:54,018 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-06-27 16:20:54,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:20:54,018 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 16:20:54,019 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-06-27 16:20:54,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:20:54,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1599247395, now seen corresponding path program 1 times [2024-06-27 16:20:54,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:20:54,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736655277] [2024-06-27 16:20:54,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:20:54,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:20:54,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:20:54,218 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 16:20:54,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:20:54,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736655277] [2024-06-27 16:20:54,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736655277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:20:54,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:20:54,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 16:20:54,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511425742] [2024-06-27 16:20:54,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:20:54,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:20:54,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:20:54,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:20:54,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:20:54,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 160 [2024-06-27 16:20:54,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 160 transitions, 360 flow. Second operand has 5 states, 5 states have (on average 38.0) internal successors, (190), 5 states have internal predecessors, (190), 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 16:20:54,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:20:54,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 160 [2024-06-27 16:20:54,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand