./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe022_tso.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-wmm/safe022_tso.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 cfc87f4ca115dcc389a4b05cbc106fd8bac1a9e17a58d50108d65580024dc2f5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:10:33,152 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:10:33,222 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:10:33,227 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:10:33,227 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:10:33,251 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:10:33,251 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:10:33,252 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:10:33,253 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:10:33,255 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:10:33,256 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:10:33,256 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:10:33,257 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:10:33,258 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:10:33,258 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:10:33,258 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:10:33,258 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:10:33,259 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:10:33,259 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:10:33,259 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:10:33,260 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:10:33,260 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:10:33,260 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:10:33,261 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:10:33,261 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:10:33,261 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:10:33,261 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:10:33,261 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:10:33,262 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:10:33,262 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:10:33,263 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:10:33,263 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:10:33,263 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:10:33,263 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:10:33,263 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:10:33,264 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:10:33,264 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:10:33,264 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:10:33,264 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:10:33,264 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:10:33,264 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:10:33,265 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:10:33,265 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:10:33,265 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cfc87f4ca115dcc389a4b05cbc106fd8bac1a9e17a58d50108d65580024dc2f5 [2024-01-27 15:10:33,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:10:33,575 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:10:33,578 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:10:33,579 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:10:33,579 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:10:33,580 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe022_tso.i [2024-01-27 15:10:34,616 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:10:34,814 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:10:34,814 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe022_tso.i [2024-01-27 15:10:34,823 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5e6e8511/796abe97d5824473997cd5c730349889/FLAGf022b1bfd [2024-01-27 15:10:34,833 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5e6e8511/796abe97d5824473997cd5c730349889 [2024-01-27 15:10:34,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:10:34,836 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:10:34,836 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:10:34,837 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:10:34,840 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:10:34,840 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:10:34" (1/1) ... [2024-01-27 15:10:34,841 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1434d02e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:10:34, skipping insertion in model container [2024-01-27 15:10:34,841 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:10:34" (1/1) ... [2024-01-27 15:10:34,885 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:10:35,035 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-wmm/safe022_tso.i[945,958] [2024-01-27 15:10:35,178 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:10:35,186 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:10:35,196 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-wmm/safe022_tso.i[945,958] [2024-01-27 15:10:35,244 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:10:35,313 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:10:35,313 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:10:35 WrapperNode [2024-01-27 15:10:35,313 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:10:35,315 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:10:35,315 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:10:35,315 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:10:35,321 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:10:35" (1/1) ... [2024-01-27 15:10:35,344 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:10:35" (1/1) ... [2024-01-27 15:10:35,357 INFO L138 Inliner]: procedures = 175, calls = 40, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 58 [2024-01-27 15:10:35,358 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:10:35,358 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:10:35,358 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:10:35,358 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:10:35,365 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:10:35" (1/1) ... [2024-01-27 15:10:35,366 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:10:35" (1/1) ... [2024-01-27 15:10:35,367 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:10:35" (1/1) ... [2024-01-27 15:10:35,386 INFO L175 MemorySlicer]: Split 4 memory accesses to 3 slices as follows [2, 1, 1]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-01-27 15:10:35,387 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:10:35" (1/1) ... [2024-01-27 15:10:35,387 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:10:35" (1/1) ... [2024-01-27 15:10:35,394 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:10:35" (1/1) ... [2024-01-27 15:10:35,395 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:10:35" (1/1) ... [2024-01-27 15:10:35,396 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:10:35" (1/1) ... [2024-01-27 15:10:35,397 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:10:35" (1/1) ... [2024-01-27 15:10:35,398 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:10:35,398 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:10:35,399 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:10:35,399 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:10:35,399 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:10:35" (1/1) ... [2024-01-27 15:10:35,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:10:35,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:10:35,421 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 15:10:35,426 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 15:10:35,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:10:35,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:10:35,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:10:35,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 15:10:35,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:10:35,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:10:35,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:10:35,454 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-01-27 15:10:35,454 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-01-27 15:10:35,454 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-01-27 15:10:35,455 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-01-27 15:10:35,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:10:35,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:10:35,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:10:35,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 15:10:35,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:10:35,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:10:35,456 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 15:10:35,549 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:10:35,551 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:10:35,650 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:10:35,650 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:10:35,714 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:10:35,714 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-01-27 15:10:35,715 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:10:35 BoogieIcfgContainer [2024-01-27 15:10:35,715 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:10:35,716 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:10:35,719 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:10:35,721 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:10:35,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:10:34" (1/3) ... [2024-01-27 15:10:35,722 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a57e9e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:10:35, skipping insertion in model container [2024-01-27 15:10:35,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:10:35" (2/3) ... [2024-01-27 15:10:35,722 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a57e9e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:10:35, skipping insertion in model container [2024-01-27 15:10:35,723 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:10:35" (3/3) ... [2024-01-27 15:10:35,723 INFO L112 eAbstractionObserver]: Analyzing ICFG safe022_tso.i [2024-01-27 15:10:35,729 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:10:35,735 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:10:35,735 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:10:35,735 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:10:35,758 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 15:10:35,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 35 places, 29 transitions, 66 flow [2024-01-27 15:10:35,807 INFO L124 PetriNetUnfolderBase]: 1/27 cut-off events. [2024-01-27 15:10:35,812 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:10:35,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 1/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 35 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2024-01-27 15:10:35,815 INFO L82 GeneralOperation]: Start removeDead. Operand has 35 places, 29 transitions, 66 flow [2024-01-27 15:10:35,817 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 24 transitions, 54 flow [2024-01-27 15:10:35,829 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:10:35,836 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;@232133c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:10:35,837 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:10:35,853 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:10:35,853 INFO L124 PetriNetUnfolderBase]: 0/23 cut-off events. [2024-01-27 15:10:35,853 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:10:35,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:10:35,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:10:35,854 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:10:35,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:10:35,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1099114732, now seen corresponding path program 1 times [2024-01-27 15:10:35,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:10:35,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348712771] [2024-01-27 15:10:35,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:10:35,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:10:35,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:10:36,232 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 15:10:36,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:10:36,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348712771] [2024-01-27 15:10:36,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348712771] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:10:36,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:10:36,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:10:36,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707823054] [2024-01-27 15:10:36,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:10:36,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:10:36,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:10:36,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:10:36,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:10:36,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 29 [2024-01-27 15:10:36,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 54 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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 15:10:36,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:10:36,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 29 [2024-01-27 15:10:36,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:10:36,382 INFO L124 PetriNetUnfolderBase]: 54/152 cut-off events. [2024-01-27 15:10:36,382 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:10:36,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 152 events. 54/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 600 event pairs, 6 based on Foata normal form. 9/156 useless extension candidates. Maximal degree in co-relation 266. Up to 55 conditions per place. [2024-01-27 15:10:36,386 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 17 selfloop transitions, 4 changer transitions 1/34 dead transitions. [2024-01-27 15:10:36,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 34 transitions, 121 flow [2024-01-27 15:10:36,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:10:36,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:10:36,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2024-01-27 15:10:36,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7241379310344828 [2024-01-27 15:10:36,398 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 54 flow. Second operand 4 states and 84 transitions. [2024-01-27 15:10:36,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 34 transitions, 121 flow [2024-01-27 15:10:36,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 34 transitions, 118 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 15:10:36,403 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 78 flow [2024-01-27 15:10:36,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2024-01-27 15:10:36,407 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2024-01-27 15:10:36,407 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 78 flow [2024-01-27 15:10:36,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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 15:10:36,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:10:36,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:10:36,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:10:36,408 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:10:36,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:10:36,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1007390170, now seen corresponding path program 1 times [2024-01-27 15:10:36,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:10:36,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939390313] [2024-01-27 15:10:36,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:10:36,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:10:36,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:10:36,583 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 15:10:36,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:10:36,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939390313] [2024-01-27 15:10:36,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939390313] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:10:36,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:10:36,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:10:36,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476377207] [2024-01-27 15:10:36,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:10:36,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:10:36,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:10:36,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:10:36,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:10:36,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 29 [2024-01-27 15:10:36,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 78 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 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 15:10:36,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:10:36,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 29 [2024-01-27 15:10:36,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:10:36,673 INFO L124 PetriNetUnfolderBase]: 38/107 cut-off events. [2024-01-27 15:10:36,673 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-01-27 15:10:36,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 107 events. 38/107 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 285 event pairs, 2 based on Foata normal form. 8/111 useless extension candidates. Maximal degree in co-relation 240. Up to 28 conditions per place. [2024-01-27 15:10:36,676 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 16 selfloop transitions, 6 changer transitions 1/35 dead transitions. [2024-01-27 15:10:36,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 35 transitions, 147 flow [2024-01-27 15:10:36,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:10:36,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:10:36,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-01-27 15:10:36,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6896551724137931 [2024-01-27 15:10:36,679 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 78 flow. Second operand 5 states and 100 transitions. [2024-01-27 15:10:36,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 35 transitions, 147 flow [2024-01-27 15:10:36,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 138 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-01-27 15:10:36,684 INFO L231 Difference]: Finished difference. Result has 38 places, 26 transitions, 94 flow [2024-01-27 15:10:36,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=94, PETRI_PLACES=38, PETRI_TRANSITIONS=26} [2024-01-27 15:10:36,684 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2024-01-27 15:10:36,685 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 26 transitions, 94 flow [2024-01-27 15:10:36,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 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 15:10:36,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:10:36,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:10:36,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:10:36,686 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:10:36,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:10:36,688 INFO L85 PathProgramCache]: Analyzing trace with hash 960397710, now seen corresponding path program 1 times [2024-01-27 15:10:36,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:10:36,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465671264] [2024-01-27 15:10:36,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:10:36,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:10:36,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:10:36,850 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 15:10:36,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:10:36,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465671264] [2024-01-27 15:10:36,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465671264] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:10:36,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:10:36,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 15:10:36,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107777546] [2024-01-27 15:10:36,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:10:36,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:10:36,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:10:36,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:10:36,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:10:36,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 29 [2024-01-27 15:10:36,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 26 transitions, 94 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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 15:10:36,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:10:36,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 29 [2024-01-27 15:10:36,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:10:37,003 INFO L124 PetriNetUnfolderBase]: 67/188 cut-off events. [2024-01-27 15:10:37,003 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2024-01-27 15:10:37,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 188 events. 67/188 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 688 event pairs, 26 based on Foata normal form. 4/181 useless extension candidates. Maximal degree in co-relation 418. Up to 61 conditions per place. [2024-01-27 15:10:37,007 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 14 selfloop transitions, 3 changer transitions 15/44 dead transitions. [2024-01-27 15:10:37,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 44 transitions, 202 flow [2024-01-27 15:10:37,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:10:37,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:10:37,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-01-27 15:10:37,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6108374384236454 [2024-01-27 15:10:37,011 INFO L175 Difference]: Start difference. First operand has 38 places, 26 transitions, 94 flow. Second operand 7 states and 124 transitions. [2024-01-27 15:10:37,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 44 transitions, 202 flow [2024-01-27 15:10:37,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 44 transitions, 168 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-01-27 15:10:37,014 INFO L231 Difference]: Finished difference. Result has 42 places, 26 transitions, 81 flow [2024-01-27 15:10:37,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=81, PETRI_PLACES=42, PETRI_TRANSITIONS=26} [2024-01-27 15:10:37,015 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 11 predicate places. [2024-01-27 15:10:37,015 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 26 transitions, 81 flow [2024-01-27 15:10:37,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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 15:10:37,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:10:37,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:10:37,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:10:37,016 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:10:37,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:10:37,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1749020998, now seen corresponding path program 2 times [2024-01-27 15:10:37,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:10:37,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696147357] [2024-01-27 15:10:37,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:10:37,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:10:37,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:10:37,142 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 15:10:37,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:10:37,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696147357] [2024-01-27 15:10:37,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696147357] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:10:37,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:10:37,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 15:10:37,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801807249] [2024-01-27 15:10:37,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:10:37,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:10:37,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:10:37,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:10:37,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:10:37,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 29 [2024-01-27 15:10:37,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 26 transitions, 81 flow. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 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 15:10:37,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:10:37,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 29 [2024-01-27 15:10:37,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:10:37,223 INFO L124 PetriNetUnfolderBase]: 28/92 cut-off events. [2024-01-27 15:10:37,224 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-01-27 15:10:37,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 92 events. 28/92 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 240 event pairs, 5 based on Foata normal form. 4/90 useless extension candidates. Maximal degree in co-relation 188. Up to 33 conditions per place. [2024-01-27 15:10:37,224 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 0 selfloop transitions, 0 changer transitions 30/30 dead transitions. [2024-01-27 15:10:37,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 30 transitions, 125 flow [2024-01-27 15:10:37,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:10:37,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:10:37,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-01-27 15:10:37,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5632183908045977 [2024-01-27 15:10:37,227 INFO L175 Difference]: Start difference. First operand has 42 places, 26 transitions, 81 flow. Second operand 6 states and 98 transitions. [2024-01-27 15:10:37,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 30 transitions, 125 flow [2024-01-27 15:10:37,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 30 transitions, 119 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-01-27 15:10:37,228 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2024-01-27 15:10:37,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2024-01-27 15:10:37,229 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 8 predicate places. [2024-01-27 15:10:37,229 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2024-01-27 15:10:37,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 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 15:10:37,232 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2024-01-27 15:10:37,232 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2024-01-27 15:10:37,232 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2024-01-27 15:10:37,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:10:37,233 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2024-01-27 15:10:37,235 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-01-27 15:10:37,235 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-01-27 15:10:37,239 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 03:10:37 BasicIcfg [2024-01-27 15:10:37,239 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-01-27 15:10:37,239 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-01-27 15:10:37,239 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-01-27 15:10:37,239 INFO L274 PluginConnector]: Witness Printer initialized [2024-01-27 15:10:37,240 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:10:35" (3/4) ... [2024-01-27 15:10:37,241 INFO L137 WitnessPrinter]: Generating witness for correct program [2024-01-27 15:10:37,243 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2024-01-27 15:10:37,243 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2024-01-27 15:10:37,246 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 30 nodes and edges [2024-01-27 15:10:37,246 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2024-01-27 15:10:37,246 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-01-27 15:10:37,246 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-01-27 15:10:37,302 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-01-27 15:10:37,303 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-01-27 15:10:37,303 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-01-27 15:10:37,303 INFO L158 Benchmark]: Toolchain (without parser) took 2467.57ms. Allocated memory is still 163.6MB. Free memory was 92.2MB in the beginning and 100.8MB in the end (delta: -8.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-01-27 15:10:37,303 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 113.2MB. Free memory was 73.4MB in the beginning and 73.4MB in the end (delta: 20.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-01-27 15:10:37,304 INFO L158 Benchmark]: CACSL2BoogieTranslator took 477.04ms. Allocated memory is still 163.6MB. Free memory was 92.0MB in the beginning and 128.8MB in the end (delta: -36.8MB). Peak memory consumption was 21.6MB. Max. memory is 16.1GB. [2024-01-27 15:10:37,304 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.15ms. Allocated memory is still 163.6MB. Free memory was 128.8MB in the beginning and 127.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-01-27 15:10:37,304 INFO L158 Benchmark]: Boogie Preprocessor took 39.94ms. Allocated memory is still 163.6MB. Free memory was 127.1MB in the beginning and 124.6MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-01-27 15:10:37,304 INFO L158 Benchmark]: RCFGBuilder took 316.36ms. Allocated memory is still 163.6MB. Free memory was 124.6MB in the beginning and 104.7MB in the end (delta: 19.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-01-27 15:10:37,304 INFO L158 Benchmark]: TraceAbstraction took 1522.84ms. Allocated memory is still 163.6MB. Free memory was 104.2MB in the beginning and 105.0MB in the end (delta: -790.7kB). Peak memory consumption was 325.0kB. Max. memory is 16.1GB. [2024-01-27 15:10:37,305 INFO L158 Benchmark]: Witness Printer took 63.44ms. Allocated memory is still 163.6MB. Free memory was 105.0MB in the beginning and 100.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-01-27 15:10:37,306 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 113.2MB. Free memory was 73.4MB in the beginning and 73.4MB in the end (delta: 20.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 477.04ms. Allocated memory is still 163.6MB. Free memory was 92.0MB in the beginning and 128.8MB in the end (delta: -36.8MB). Peak memory consumption was 21.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.15ms. Allocated memory is still 163.6MB. Free memory was 128.8MB in the beginning and 127.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.94ms. Allocated memory is still 163.6MB. Free memory was 127.1MB in the beginning and 124.6MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 316.36ms. Allocated memory is still 163.6MB. Free memory was 124.6MB in the beginning and 104.7MB in the end (delta: 19.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 1522.84ms. Allocated memory is still 163.6MB. Free memory was 104.2MB in the beginning and 105.0MB in the end (delta: -790.7kB). Peak memory consumption was 325.0kB. Max. memory is 16.1GB. * Witness Printer took 63.44ms. Allocated memory is still 163.6MB. Free memory was 105.0MB in the beginning and 100.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 45 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1.5s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 122 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 102 mSDsluCounter, 105 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 86 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 231 IncrementalHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 19 mSDtfsCounter, 231 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=2, InterpolantAutomatonStates: 22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 73 NumberOfCodeBlocks, 73 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 69 ConstructedInterpolants, 0 QuantifiedInterpolants, 313 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-01-27 15:10:37,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE