./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.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 1d61eb304445c3cb39dfadfa4748d680ea5f0f4958f8bc176e8bc3c77c47e674 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 17:30:29,633 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 17:30:29,700 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 17:30:29,705 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 17:30:29,705 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 17:30:29,733 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 17:30:29,734 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 17:30:29,734 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 17:30:29,735 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 17:30:29,738 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 17:30:29,738 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 17:30:29,738 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 17:30:29,739 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 17:30:29,740 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 17:30:29,740 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 17:30:29,740 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 17:30:29,741 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 17:30:29,741 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 17:30:29,741 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 17:30:29,741 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 17:30:29,741 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 17:30:29,742 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 17:30:29,742 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 17:30:29,742 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 17:30:29,742 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 17:30:29,743 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 17:30:29,743 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 17:30:29,743 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 17:30:29,744 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 17:30:29,744 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 17:30:29,745 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 17:30:29,745 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 17:30:29,745 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:30:29,745 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 17:30:29,745 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 17:30:29,746 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 17:30:29,746 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 17:30:29,746 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 17:30:29,746 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 17:30:29,746 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 17:30:29,747 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 17:30:29,747 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 17:30:29,747 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 17:30:29,747 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d61eb304445c3cb39dfadfa4748d680ea5f0f4958f8bc176e8bc3c77c47e674 [2024-06-27 17:30:29,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 17:30:29,994 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 17:30:29,996 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 17:30:29,997 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 17:30:29,997 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 17:30:29,998 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2024-06-27 17:30:31,181 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 17:30:31,434 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 17:30:31,434 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2024-06-27 17:30:31,449 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e0a599ca/3f310d5dbd374980ac25ceda29a8c892/FLAGf22774178 [2024-06-27 17:30:31,461 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e0a599ca/3f310d5dbd374980ac25ceda29a8c892 [2024-06-27 17:30:31,463 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 17:30:31,465 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 17:30:31,467 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 17:30:31,468 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 17:30:31,472 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 17:30:31,472 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:30:31" (1/1) ... [2024-06-27 17:30:31,473 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1281fccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:30:31, skipping insertion in model container [2024-06-27 17:30:31,473 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 05:30:31" (1/1) ... [2024-06-27 17:30:31,518 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 17:30:32,048 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i[78860,78873] [2024-06-27 17:30:32,060 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:30:32,072 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 17:30:32,156 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i[78860,78873] [2024-06-27 17:30:32,163 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 17:30:32,244 INFO L206 MainTranslator]: Completed translation [2024-06-27 17:30:32,245 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:30:32 WrapperNode [2024-06-27 17:30:32,245 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 17:30:32,245 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 17:30:32,246 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 17:30:32,246 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 17:30:32,252 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:30:32" (1/1) ... [2024-06-27 17:30:32,273 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:30:32" (1/1) ... [2024-06-27 17:30:32,305 INFO L138 Inliner]: procedures = 481, calls = 74, calls flagged for inlining = 19, calls inlined = 19, statements flattened = 286 [2024-06-27 17:30:32,305 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 17:30:32,306 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 17:30:32,307 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 17:30:32,307 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 17:30:32,315 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:30:32" (1/1) ... [2024-06-27 17:30:32,316 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:30:32" (1/1) ... [2024-06-27 17:30:32,333 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:30:32" (1/1) ... [2024-06-27 17:30:32,348 INFO L175 MemorySlicer]: Split 48 memory accesses to 4 slices as follows [2, 5, 7, 34]. 71 percent of accesses are in the largest equivalence class. The 15 initializations are split as follows [2, 3, 2, 8]. The 15 writes are split as follows [0, 1, 2, 12]. [2024-06-27 17:30:32,369 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:30:32" (1/1) ... [2024-06-27 17:30:32,369 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:30:32" (1/1) ... [2024-06-27 17:30:32,382 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:30:32" (1/1) ... [2024-06-27 17:30:32,386 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:30:32" (1/1) ... [2024-06-27 17:30:32,390 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:30:32" (1/1) ... [2024-06-27 17:30:32,392 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:30:32" (1/1) ... [2024-06-27 17:30:32,408 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 17:30:32,409 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 17:30:32,409 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 17:30:32,409 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 17:30:32,410 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:30:32" (1/1) ... [2024-06-27 17:30:32,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 17:30:32,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:30:32,452 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 17:30:32,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 17:30:32,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 17:30:32,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-06-27 17:30:32,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 17:30:32,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 17:30:32,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 17:30:32,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-06-27 17:30:32,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-06-27 17:30:32,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 17:30:32,514 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2024-06-27 17:30:32,514 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2024-06-27 17:30:32,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 17:30:32,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 17:30:32,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-06-27 17:30:32,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 17:30:32,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 17:30:32,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-06-27 17:30:32,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-06-27 17:30:32,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 17:30:32,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 17:30:32,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-06-27 17:30:32,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-06-27 17:30:32,517 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 17:30:32,781 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 17:30:32,782 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 17:30:33,096 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 17:30:33,096 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 17:30:33,274 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 17:30:33,274 INFO L320 CfgBuilder]: Removed 7 assume(true) statements. [2024-06-27 17:30:33,275 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:30:33 BoogieIcfgContainer [2024-06-27 17:30:33,275 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 17:30:33,277 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 17:30:33,277 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 17:30:33,279 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 17:30:33,279 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 05:30:31" (1/3) ... [2024-06-27 17:30:33,280 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14266d4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:30:33, skipping insertion in model container [2024-06-27 17:30:33,280 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 05:30:32" (2/3) ... [2024-06-27 17:30:33,281 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14266d4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 05:30:33, skipping insertion in model container [2024-06-27 17:30:33,281 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 05:30:33" (3/3) ... [2024-06-27 17:30:33,283 INFO L112 eAbstractionObserver]: Analyzing ICFG safestack_relacy.i [2024-06-27 17:30:33,295 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 17:30:33,302 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 17:30:33,303 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 17:30:33,303 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 17:30:33,358 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-06-27 17:30:33,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 63 transitions, 133 flow [2024-06-27 17:30:33,419 INFO L124 PetriNetUnfolderBase]: 12/67 cut-off events. [2024-06-27 17:30:33,419 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-06-27 17:30:33,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 67 events. 12/67 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 129 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 48. Up to 3 conditions per place. [2024-06-27 17:30:33,423 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 63 transitions, 133 flow [2024-06-27 17:30:33,427 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 61 transitions, 126 flow [2024-06-27 17:30:33,437 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:30:33,442 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;@1e5c001a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:30:33,442 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-06-27 17:30:33,448 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:30:33,448 INFO L124 PetriNetUnfolderBase]: 1/24 cut-off events. [2024-06-27 17:30:33,448 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:30:33,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:30:33,449 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:30:33,449 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-06-27 17:30:33,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:30:33,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1631325735, now seen corresponding path program 1 times [2024-06-27 17:30:33,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:30:33,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76943671] [2024-06-27 17:30:33,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:30:33,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:30:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:30:33,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 17:30:33,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:30:33,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76943671] [2024-06-27 17:30:33,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76943671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:30:33,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:30:33,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:30:33,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811133623] [2024-06-27 17:30:33,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:30:33,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:30:33,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:30:33,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:30:33,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:30:33,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 63 [2024-06-27 17:30:33,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 61 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:30:33,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:30:33,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 63 [2024-06-27 17:30:33,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:30:34,033 INFO L124 PetriNetUnfolderBase]: 182/404 cut-off events. [2024-06-27 17:30:34,033 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 17:30:34,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 776 conditions, 404 events. 182/404 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1408 event pairs, 145 based on Foata normal form. 6/311 useless extension candidates. Maximal degree in co-relation 732. Up to 355 conditions per place. [2024-06-27 17:30:34,037 INFO L140 encePairwiseOnDemand]: 54/63 looper letters, 49 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2024-06-27 17:30:34,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 60 transitions, 230 flow [2024-06-27 17:30:34,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:30:34,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:30:34,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-06-27 17:30:34,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3412698412698413 [2024-06-27 17:30:34,048 INFO L175 Difference]: Start difference. First operand has 53 places, 61 transitions, 126 flow. Second operand 4 states and 86 transitions. [2024-06-27 17:30:34,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 60 transitions, 230 flow [2024-06-27 17:30:34,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 60 transitions, 230 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 17:30:34,053 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 134 flow [2024-06-27 17:30:34,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2024-06-27 17:30:34,057 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 4 predicate places. [2024-06-27 17:30:34,058 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 134 flow [2024-06-27 17:30:34,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:30:34,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:30:34,058 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:30:34,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 17:30:34,059 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-06-27 17:30:34,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:30:34,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1697882588, now seen corresponding path program 1 times [2024-06-27 17:30:34,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:30:34,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975049348] [2024-06-27 17:30:34,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:30:34,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:30:34,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:30:34,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 17:30:34,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:30:34,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975049348] [2024-06-27 17:30:34,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975049348] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:30:34,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603598350] [2024-06-27 17:30:34,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:30:34,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:30:34,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:30:34,214 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:30:34,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 17:30:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:30:34,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 5 conjunts are in the unsatisfiable core [2024-06-27 17:30:34,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:30:34,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 17:30:34,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:30:34,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 17:30:34,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603598350] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:30:34,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:30:34,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-06-27 17:30:34,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002579554] [2024-06-27 17:30:34,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:30:34,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:30:34,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:30:34,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:30:34,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:30:34,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 63 [2024-06-27 17:30:34,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 134 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:30:34,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:30:34,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 63 [2024-06-27 17:30:34,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:30:34,611 INFO L124 PetriNetUnfolderBase]: 182/405 cut-off events. [2024-06-27 17:30:34,612 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-06-27 17:30:34,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 405 events. 182/405 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1405 event pairs, 145 based on Foata normal form. 1/308 useless extension candidates. Maximal degree in co-relation 750. Up to 355 conditions per place. [2024-06-27 17:30:34,614 INFO L140 encePairwiseOnDemand]: 57/63 looper letters, 48 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2024-06-27 17:30:34,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 61 transitions, 248 flow [2024-06-27 17:30:34,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:30:34,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:30:34,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-27 17:30:34,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2857142857142857 [2024-06-27 17:30:34,615 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 134 flow. Second operand 5 states and 90 transitions. [2024-06-27 17:30:34,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 61 transitions, 248 flow [2024-06-27 17:30:34,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 61 transitions, 242 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 17:30:34,617 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 154 flow [2024-06-27 17:30:34,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=154, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2024-06-27 17:30:34,618 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 8 predicate places. [2024-06-27 17:30:34,618 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 154 flow [2024-06-27 17:30:34,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:30:34,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:30:34,619 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:30:34,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-06-27 17:30:34,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:30:34,832 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-06-27 17:30:34,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:30:34,832 INFO L85 PathProgramCache]: Analyzing trace with hash 218199559, now seen corresponding path program 2 times [2024-06-27 17:30:34,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:30:34,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379291063] [2024-06-27 17:30:34,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:30:34,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:30:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 17:30:34,877 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 17:30:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 17:30:34,921 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 17:30:34,921 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 17:30:34,922 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-06-27 17:30:34,924 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-06-27 17:30:34,924 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-06-27 17:30:34,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 17:30:34,924 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2024-06-27 17:30:34,927 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 17:30:34,927 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-06-27 17:30:34,995 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-06-27 17:30:34,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 108 transitions, 232 flow [2024-06-27 17:30:35,020 INFO L124 PetriNetUnfolderBase]: 24/123 cut-off events. [2024-06-27 17:30:35,020 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-06-27 17:30:35,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 123 events. 24/123 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 405 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 96. Up to 6 conditions per place. [2024-06-27 17:30:35,021 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 108 transitions, 232 flow [2024-06-27 17:30:35,022 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 108 transitions, 232 flow [2024-06-27 17:30:35,023 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:30:35,023 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;@1e5c001a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:30:35,023 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-27 17:30:35,027 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:30:35,027 INFO L124 PetriNetUnfolderBase]: 4/44 cut-off events. [2024-06-27 17:30:35,027 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-27 17:30:35,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:30:35,027 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:30:35,027 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-06-27 17:30:35,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:30:35,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1219984579, now seen corresponding path program 1 times [2024-06-27 17:30:35,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:30:35,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009364306] [2024-06-27 17:30:35,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:30:35,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:30:35,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:30:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 17:30:35,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:30:35,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009364306] [2024-06-27 17:30:35,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009364306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:30:35,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:30:35,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:30:35,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396276247] [2024-06-27 17:30:35,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:30:35,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:30:35,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:30:35,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:30:35,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:30:35,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 108 [2024-06-27 17:30:35,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 108 transitions, 232 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:30:35,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:30:35,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 108 [2024-06-27 17:30:35,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:30:36,848 INFO L124 PetriNetUnfolderBase]: 12511/19356 cut-off events. [2024-06-27 17:30:36,848 INFO L125 PetriNetUnfolderBase]: For 260/260 co-relation queries the response was YES. [2024-06-27 17:30:36,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37916 conditions, 19356 events. 12511/19356 cut-off events. For 260/260 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 116030 event pairs, 10774 based on Foata normal form. 395/15619 useless extension candidates. Maximal degree in co-relation 33123. Up to 18390 conditions per place. [2024-06-27 17:30:36,949 INFO L140 encePairwiseOnDemand]: 95/108 looper letters, 86 selfloop transitions, 4 changer transitions 0/103 dead transitions. [2024-06-27 17:30:36,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 103 transitions, 402 flow [2024-06-27 17:30:36,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 17:30:36,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 17:30:36,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 151 transitions. [2024-06-27 17:30:36,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34953703703703703 [2024-06-27 17:30:36,954 INFO L175 Difference]: Start difference. First operand has 90 places, 108 transitions, 232 flow. Second operand 4 states and 151 transitions. [2024-06-27 17:30:36,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 103 transitions, 402 flow [2024-06-27 17:30:36,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 103 transitions, 402 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 17:30:36,958 INFO L231 Difference]: Finished difference. Result has 94 places, 101 transitions, 232 flow [2024-06-27 17:30:36,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=232, PETRI_PLACES=94, PETRI_TRANSITIONS=101} [2024-06-27 17:30:36,960 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 4 predicate places. [2024-06-27 17:30:36,960 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 101 transitions, 232 flow [2024-06-27 17:30:36,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:30:36,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:30:36,961 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:30:36,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 17:30:36,961 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-06-27 17:30:36,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:30:36,961 INFO L85 PathProgramCache]: Analyzing trace with hash 405578324, now seen corresponding path program 1 times [2024-06-27 17:30:36,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:30:36,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74458059] [2024-06-27 17:30:36,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:30:36,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:30:36,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:30:37,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 17:30:37,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:30:37,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74458059] [2024-06-27 17:30:37,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74458059] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 17:30:37,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264127250] [2024-06-27 17:30:37,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:30:37,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:30:37,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 17:30:37,038 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 17:30:37,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 17:30:37,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:30:37,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 5 conjunts are in the unsatisfiable core [2024-06-27 17:30:37,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 17:30:37,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 17:30:37,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 17:30:37,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-06-27 17:30:37,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264127250] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 17:30:37,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 17:30:37,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-06-27 17:30:37,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25846708] [2024-06-27 17:30:37,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 17:30:37,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 17:30:37,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:30:37,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 17:30:37,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-06-27 17:30:37,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 108 [2024-06-27 17:30:37,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 101 transitions, 232 flow. Second operand has 10 states, 10 states have (on average 15.9) internal successors, (159), 10 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:30:37,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:30:37,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 108 [2024-06-27 17:30:37,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 17:30:38,970 INFO L124 PetriNetUnfolderBase]: 12511/19357 cut-off events. [2024-06-27 17:30:38,970 INFO L125 PetriNetUnfolderBase]: For 261/261 co-relation queries the response was YES. [2024-06-27 17:30:38,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37927 conditions, 19357 events. 12511/19357 cut-off events. For 261/261 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 116045 event pairs, 10774 based on Foata normal form. 1/15227 useless extension candidates. Maximal degree in co-relation 37889. Up to 18390 conditions per place. [2024-06-27 17:30:39,048 INFO L140 encePairwiseOnDemand]: 102/108 looper letters, 85 selfloop transitions, 6 changer transitions 0/104 dead transitions. [2024-06-27 17:30:39,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 104 transitions, 420 flow [2024-06-27 17:30:39,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 17:30:39,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 17:30:39,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-06-27 17:30:39,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29074074074074074 [2024-06-27 17:30:39,049 INFO L175 Difference]: Start difference. First operand has 94 places, 101 transitions, 232 flow. Second operand 5 states and 157 transitions. [2024-06-27 17:30:39,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 104 transitions, 420 flow [2024-06-27 17:30:39,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 104 transitions, 414 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 17:30:39,052 INFO L231 Difference]: Finished difference. Result has 98 places, 102 transitions, 252 flow [2024-06-27 17:30:39,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=252, PETRI_PLACES=98, PETRI_TRANSITIONS=102} [2024-06-27 17:30:39,053 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 8 predicate places. [2024-06-27 17:30:39,053 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 102 transitions, 252 flow [2024-06-27 17:30:39,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.9) internal successors, (159), 10 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:30:39,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:30:39,053 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:30:39,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-06-27 17:30:39,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 17:30:39,266 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-06-27 17:30:39,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:30:39,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1793759197, now seen corresponding path program 2 times [2024-06-27 17:30:39,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:30:39,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744951172] [2024-06-27 17:30:39,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:30:39,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:30:39,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 17:30:39,291 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-06-27 17:30:39,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-06-27 17:30:39,324 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-06-27 17:30:39,324 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-06-27 17:30:39,324 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-06-27 17:30:39,324 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-06-27 17:30:39,325 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-06-27 17:30:39,325 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-06-27 17:30:39,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 17:30:39,325 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2024-06-27 17:30:39,326 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-06-27 17:30:39,326 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-06-27 17:30:39,412 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-06-27 17:30:39,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 153 transitions, 333 flow [2024-06-27 17:30:39,435 INFO L124 PetriNetUnfolderBase]: 39/190 cut-off events. [2024-06-27 17:30:39,435 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-27 17:30:39,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 190 events. 39/190 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 775 event pairs, 1 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 151. Up to 12 conditions per place. [2024-06-27 17:30:39,437 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 153 transitions, 333 flow [2024-06-27 17:30:39,439 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 153 transitions, 333 flow [2024-06-27 17:30:39,440 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 17:30:39,441 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;@1e5c001a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 17:30:39,441 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 17:30:39,445 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 17:30:39,445 INFO L124 PetriNetUnfolderBase]: 4/44 cut-off events. [2024-06-27 17:30:39,445 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-27 17:30:39,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 17:30:39,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 17:30:39,445 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-06-27 17:30:39,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 17:30:39,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1986283186, now seen corresponding path program 1 times [2024-06-27 17:30:39,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 17:30:39,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447354640] [2024-06-27 17:30:39,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 17:30:39,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 17:30:39,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 17:30:39,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 17:30:39,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 17:30:39,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447354640] [2024-06-27 17:30:39,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447354640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 17:30:39,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 17:30:39,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 17:30:39,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940170233] [2024-06-27 17:30:39,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 17:30:39,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 17:30:39,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 17:30:39,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 17:30:39,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 17:30:39,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 153 [2024-06-27 17:30:39,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 153 transitions, 333 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 17:30:39,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 17:30:39,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 153 [2024-06-27 17:30:39,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand