./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/25_stack_longest-2-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f 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/25_stack_longest-2-pthread.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 6bed9188bb7b7687ebd02ffac8f3cae5646a3288850778355d808dde868a6cf7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 16:07:53,655 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 16:07:53,720 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 16:07:53,727 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 16:07:53,728 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 16:07:53,751 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 16:07:53,751 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 16:07:53,752 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 16:07:53,752 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 16:07:53,755 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 16:07:53,755 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 16:07:53,756 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 16:07:53,757 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 16:07:53,758 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 16:07:53,758 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 16:07:53,758 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 16:07:53,758 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 16:07:53,758 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 16:07:53,759 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 16:07:53,759 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 16:07:53,759 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 16:07:53,759 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 16:07:53,760 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 16:07:53,760 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 16:07:53,760 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 16:07:53,760 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 16:07:53,760 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 16:07:53,761 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 16:07:53,761 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 16:07:53,761 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 16:07:53,762 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 16:07:53,762 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 16:07:53,762 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 16:07:53,763 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 16:07:53,763 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 16:07:53,763 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 16:07:53,763 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 16:07:53,763 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 16:07:53,764 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 16:07:53,764 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 16:07:53,764 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 16:07:53,764 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 16:07:53,764 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 16:07:53,765 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6bed9188bb7b7687ebd02ffac8f3cae5646a3288850778355d808dde868a6cf7 [2024-01-27 16:07:53,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 16:07:53,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 16:07:54,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 16:07:54,002 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 16:07:54,003 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 16:07:54,004 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/25_stack_longest-2-pthread.i [2024-01-27 16:07:55,185 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 16:07:55,444 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 16:07:55,446 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/25_stack_longest-2-pthread.i [2024-01-27 16:07:55,465 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdcbb2ef3/a966f5c2e6f141eeb1962ea6089eb5e0/FLAG4ae283fec [2024-01-27 16:07:55,479 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdcbb2ef3/a966f5c2e6f141eeb1962ea6089eb5e0 [2024-01-27 16:07:55,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 16:07:55,482 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 16:07:55,484 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 16:07:55,484 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 16:07:55,488 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 16:07:55,488 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 04:07:55" (1/1) ... [2024-01-27 16:07:55,489 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@105bba30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:07:55, skipping insertion in model container [2024-01-27 16:07:55,489 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 04:07:55" (1/1) ... [2024-01-27 16:07:55,530 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 16:07:55,845 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/25_stack_longest-2-pthread.i[31359,31372] [2024-01-27 16:07:55,863 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 16:07:55,875 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 16:07:55,925 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/25_stack_longest-2-pthread.i[31359,31372] [2024-01-27 16:07:55,928 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 16:07:55,964 INFO L206 MainTranslator]: Completed translation [2024-01-27 16:07:55,966 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:07:55 WrapperNode [2024-01-27 16:07:55,970 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 16:07:55,971 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 16:07:55,971 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 16:07:55,971 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 16:07:55,979 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:07:55" (1/1) ... [2024-01-27 16:07:56,031 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:07:55" (1/1) ... [2024-01-27 16:07:56,059 INFO L138 Inliner]: procedures = 172, calls = 38, calls flagged for inlining = 9, calls inlined = 8, statements flattened = 135 [2024-01-27 16:07:56,059 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 16:07:56,060 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 16:07:56,060 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 16:07:56,060 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 16:07:56,068 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:07:55" (1/1) ... [2024-01-27 16:07:56,069 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:07:55" (1/1) ... [2024-01-27 16:07:56,085 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:07:55" (1/1) ... [2024-01-27 16:07:56,102 INFO L175 MemorySlicer]: Split 13 memory accesses to 4 slices as follows [2, 5, 5, 1]. 38 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 5, 0]. The 1 writes are split as follows [0, 0, 0, 1]. [2024-01-27 16:07:56,106 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:07:55" (1/1) ... [2024-01-27 16:07:56,107 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:07:55" (1/1) ... [2024-01-27 16:07:56,111 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:07:55" (1/1) ... [2024-01-27 16:07:56,124 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:07:55" (1/1) ... [2024-01-27 16:07:56,126 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:07:55" (1/1) ... [2024-01-27 16:07:56,128 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:07:55" (1/1) ... [2024-01-27 16:07:56,131 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 16:07:56,135 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 16:07:56,135 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 16:07:56,135 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 16:07:56,136 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:07:55" (1/1) ... [2024-01-27 16:07:56,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 16:07:56,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:07:56,181 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) [2024-01-27 16:07:56,196 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 [2024-01-27 16:07:56,227 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-01-27 16:07:56,227 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-01-27 16:07:56,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 16:07:56,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 16:07:56,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 16:07:56,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 16:07:56,228 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-27 16:07:56,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 16:07:56,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 16:07:56,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 16:07:56,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 16:07:56,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 16:07:56,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 16:07:56,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 16:07:56,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 16:07:56,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 16:07:56,229 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-27 16:07:56,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 16:07:56,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 16:07:56,231 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 16:07:56,346 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 16:07:56,348 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 16:07:56,578 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 16:07:56,579 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 16:07:56,686 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 16:07:56,687 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-27 16:07:56,687 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 04:07:56 BoogieIcfgContainer [2024-01-27 16:07:56,687 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 16:07:56,688 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 16:07:56,689 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 16:07:56,691 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 16:07:56,691 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 04:07:55" (1/3) ... [2024-01-27 16:07:56,692 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4460eacc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 04:07:56, skipping insertion in model container [2024-01-27 16:07:56,692 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:07:55" (2/3) ... [2024-01-27 16:07:56,692 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4460eacc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 04:07:56, skipping insertion in model container [2024-01-27 16:07:56,692 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 04:07:56" (3/3) ... [2024-01-27 16:07:56,693 INFO L112 eAbstractionObserver]: Analyzing ICFG 25_stack_longest-2-pthread.i [2024-01-27 16:07:56,699 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 16:07:56,706 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 16:07:56,706 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 16:07:56,706 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 16:07:56,740 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 16:07:56,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 35 transitions, 74 flow [2024-01-27 16:07:56,781 INFO L124 PetriNetUnfolderBase]: 4/37 cut-off events. [2024-01-27 16:07:56,781 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 16:07:56,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 37 events. 4/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 27 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2024-01-27 16:07:56,783 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 35 transitions, 74 flow [2024-01-27 16:07:56,785 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 35 transitions, 74 flow [2024-01-27 16:07:56,791 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 16:07:56,796 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;@3595daf6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 16:07:56,797 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 16:07:56,800 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 16:07:56,801 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2024-01-27 16:07:56,801 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 16:07:56,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:07:56,802 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-01-27 16:07:56,802 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-01-27 16:07:56,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:07:56,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1631012329, now seen corresponding path program 1 times [2024-01-27 16:07:56,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:07:56,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027846685] [2024-01-27 16:07:56,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:07:56,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:07:56,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 16:07:56,916 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 16:07:56,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 16:07:56,953 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 16:07:56,955 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 16:07:56,956 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-01-27 16:07:56,957 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-01-27 16:07:56,957 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-01-27 16:07:56,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 16:07:56,958 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-01-27 16:07:56,960 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 16:07:56,960 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-01-27 16:07:56,993 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 16:07:56,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 65 transitions, 140 flow [2024-01-27 16:07:57,030 INFO L124 PetriNetUnfolderBase]: 8/70 cut-off events. [2024-01-27 16:07:57,030 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 16:07:57,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 70 events. 8/70 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 125 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 61. Up to 3 conditions per place. [2024-01-27 16:07:57,031 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 65 transitions, 140 flow [2024-01-27 16:07:57,032 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 65 transitions, 140 flow [2024-01-27 16:07:57,033 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 16:07:57,034 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;@3595daf6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 16:07:57,034 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-27 16:07:57,038 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 16:07:57,038 INFO L124 PetriNetUnfolderBase]: 1/23 cut-off events. [2024-01-27 16:07:57,038 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 16:07:57,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:07:57,038 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-01-27 16:07:57,039 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)] === [2024-01-27 16:07:57,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:07:57,039 INFO L85 PathProgramCache]: Analyzing trace with hash -979987022, now seen corresponding path program 1 times [2024-01-27 16:07:57,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:07:57,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346143049] [2024-01-27 16:07:57,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:07:57,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:07:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 16:07:57,057 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 16:07:57,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 16:07:57,073 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 16:07:57,073 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 16:07:57,073 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-01-27 16:07:57,073 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-01-27 16:07:57,074 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-01-27 16:07:57,074 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-01-27 16:07:57,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 16:07:57,074 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-01-27 16:07:57,075 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 16:07:57,075 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-01-27 16:07:57,113 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 16:07:57,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 95 transitions, 208 flow [2024-01-27 16:07:57,131 INFO L124 PetriNetUnfolderBase]: 12/103 cut-off events. [2024-01-27 16:07:57,131 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-27 16:07:57,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 103 events. 12/103 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 273 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2024-01-27 16:07:57,133 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 95 transitions, 208 flow [2024-01-27 16:07:57,134 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 95 transitions, 208 flow [2024-01-27 16:07:57,134 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 16:07:57,135 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;@3595daf6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 16:07:57,135 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-01-27 16:07:57,141 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 16:07:57,141 INFO L124 PetriNetUnfolderBase]: 2/38 cut-off events. [2024-01-27 16:07:57,141 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-01-27 16:07:57,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:07:57,142 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-01-27 16:07:57,142 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)] === [2024-01-27 16:07:57,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:07:57,142 INFO L85 PathProgramCache]: Analyzing trace with hash -685395754, now seen corresponding path program 1 times [2024-01-27 16:07:57,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:07:57,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647648699] [2024-01-27 16:07:57,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:07:57,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:07:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 16:07:57,161 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 16:07:57,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 16:07:57,178 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 16:07:57,178 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 16:07:57,179 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-01-27 16:07:57,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-01-27 16:07:57,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-01-27 16:07:57,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-01-27 16:07:57,179 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-01-27 16:07:57,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 16:07:57,180 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-01-27 16:07:57,180 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 16:07:57,180 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-01-27 16:07:57,229 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 16:07:57,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 125 transitions, 278 flow [2024-01-27 16:07:57,250 INFO L124 PetriNetUnfolderBase]: 16/136 cut-off events. [2024-01-27 16:07:57,250 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-01-27 16:07:57,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 136 events. 16/136 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 438 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 119. Up to 5 conditions per place. [2024-01-27 16:07:57,252 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 125 transitions, 278 flow [2024-01-27 16:07:57,253 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 125 transitions, 278 flow [2024-01-27 16:07:57,254 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 16:07:57,255 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;@3595daf6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 16:07:57,255 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-01-27 16:07:57,262 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 16:07:57,263 INFO L124 PetriNetUnfolderBase]: 3/56 cut-off events. [2024-01-27 16:07:57,263 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-01-27 16:07:57,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:07:57,263 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2024-01-27 16:07:57,263 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)] === [2024-01-27 16:07:57,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:07:57,264 INFO L85 PathProgramCache]: Analyzing trace with hash -967689049, now seen corresponding path program 1 times [2024-01-27 16:07:57,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:07:57,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92438714] [2024-01-27 16:07:57,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:07:57,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:07:57,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 16:07:57,283 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 16:07:57,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 16:07:57,314 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 16:07:57,314 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 16:07:57,315 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-01-27 16:07:57,315 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-01-27 16:07:57,315 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2024-01-27 16:07:57,315 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-01-27 16:07:57,316 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-01-27 16:07:57,316 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-01-27 16:07:57,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 16:07:57,316 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-01-27 16:07:57,317 WARN L234 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 16:07:57,317 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-01-27 16:07:57,413 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 16:07:57,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 155 transitions, 350 flow [2024-01-27 16:07:57,446 INFO L124 PetriNetUnfolderBase]: 20/169 cut-off events. [2024-01-27 16:07:57,446 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-01-27 16:07:57,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 169 events. 20/169 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 589 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 154. Up to 6 conditions per place. [2024-01-27 16:07:57,448 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 155 transitions, 350 flow [2024-01-27 16:07:57,449 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 146 places, 155 transitions, 350 flow [2024-01-27 16:07:57,450 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 16:07:57,450 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;@3595daf6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 16:07:57,451 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-01-27 16:07:57,459 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 16:07:57,459 INFO L124 PetriNetUnfolderBase]: 7/87 cut-off events. [2024-01-27 16:07:57,459 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-01-27 16:07:57,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:07:57,459 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:07:57,460 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-01-27 16:07:57,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:07:57,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1798449643, now seen corresponding path program 1 times [2024-01-27 16:07:57,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:07:57,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388892272] [2024-01-27 16:07:57,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:07:57,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:07:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 16:07:57,479 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 16:07:57,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 16:07:57,494 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 16:07:57,495 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 16:07:57,495 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-01-27 16:07:57,495 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2024-01-27 16:07:57,495 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2024-01-27 16:07:57,495 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2024-01-27 16:07:57,496 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2024-01-27 16:07:57,496 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2024-01-27 16:07:57,496 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2024-01-27 16:07:57,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 16:07:57,496 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-01-27 16:07:57,497 WARN L234 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 16:07:57,497 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2024-01-27 16:07:57,554 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 16:07:57,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 185 transitions, 424 flow [2024-01-27 16:07:57,581 INFO L124 PetriNetUnfolderBase]: 24/202 cut-off events. [2024-01-27 16:07:57,582 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-01-27 16:07:57,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 202 events. 24/202 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 759 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 194. Up to 7 conditions per place. [2024-01-27 16:07:57,585 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 185 transitions, 424 flow [2024-01-27 16:07:57,586 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 185 transitions, 424 flow [2024-01-27 16:07:57,587 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 16:07:57,588 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;@3595daf6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 16:07:57,588 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-01-27 16:07:57,596 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 16:07:57,597 INFO L124 PetriNetUnfolderBase]: 7/90 cut-off events. [2024-01-27 16:07:57,597 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-01-27 16:07:57,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:07:57,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:07:57,597 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2024-01-27 16:07:57,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:07:57,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1510528092, now seen corresponding path program 1 times [2024-01-27 16:07:57,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:07:57,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060747931] [2024-01-27 16:07:57,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:07:57,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:07:57,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:07:57,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:07:57,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:07:57,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060747931] [2024-01-27 16:07:57,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060747931] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:07:57,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:07:57,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 16:07:57,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617785429] [2024-01-27 16:07:57,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:07:57,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 16:07:57,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:07:57,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 16:07:57,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 16:07:57,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 185 [2024-01-27 16:07:57,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 185 transitions, 424 flow. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 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) [2024-01-27 16:07:57,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:07:57,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 185 [2024-01-27 16:07:57,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand