./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 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-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-dev-a340643-m [2024-01-27 16:17:03,295 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 16:17:03,366 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 16:17:03,377 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 16:17:03,377 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 16:17:03,410 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 16:17:03,410 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 16:17:03,411 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 16:17:03,412 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 16:17:03,417 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 16:17:03,417 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 16:17:03,418 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 16:17:03,419 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 16:17:03,420 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 16:17:03,420 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 16:17:03,421 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 16:17:03,421 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 16:17:03,421 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 16:17:03,421 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 16:17:03,422 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 16:17:03,422 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 16:17:03,422 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 16:17:03,423 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 16:17:03,423 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 16:17:03,423 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 16:17:03,423 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 16:17:03,424 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 16:17:03,424 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 16:17:03,424 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 16:17:03,425 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 16:17:03,426 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 16:17:03,426 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 16:17:03,426 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 16:17:03,426 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 16:17:03,427 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 16:17:03,427 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 16:17:03,427 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 16:17:03,427 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 16:17:03,427 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 16:17:03,428 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 16:17:03,428 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 16:17:03,428 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 16:17:03,428 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 16:17:03,429 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d61eb304445c3cb39dfadfa4748d680ea5f0f4958f8bc176e8bc3c77c47e674 [2024-01-27 16:17:03,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 16:17:03,723 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 16:17:03,725 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 16:17:03,726 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 16:17:03,727 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 16:17:03,728 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2024-01-27 16:17:04,852 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 16:17:05,187 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 16:17:05,188 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2024-01-27 16:17:05,214 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a5c49ed7/198d6563241e4c1a8842511d0e59cb5d/FLAGae3bbe559 [2024-01-27 16:17:05,228 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a5c49ed7/198d6563241e4c1a8842511d0e59cb5d [2024-01-27 16:17:05,230 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 16:17:05,232 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 16:17:05,234 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 16:17:05,234 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 16:17:05,239 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 16:17:05,240 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 04:17:05" (1/1) ... [2024-01-27 16:17:05,240 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7acf985e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:17:05, skipping insertion in model container [2024-01-27 16:17:05,241 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 04:17:05" (1/1) ... [2024-01-27 16:17:05,299 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 16:17:06,034 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-complex/safestack_relacy.i[78860,78873] [2024-01-27 16:17:06,046 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 16:17:06,069 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 16:17:06,130 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-complex/safestack_relacy.i[78860,78873] [2024-01-27 16:17:06,132 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 16:17:06,225 INFO L206 MainTranslator]: Completed translation [2024-01-27 16:17:06,225 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:17:06 WrapperNode [2024-01-27 16:17:06,225 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 16:17:06,226 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 16:17:06,227 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 16:17:06,227 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 16:17:06,233 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:17:06" (1/1) ... [2024-01-27 16:17:06,255 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:17:06" (1/1) ... [2024-01-27 16:17:06,289 INFO L138 Inliner]: procedures = 481, calls = 74, calls flagged for inlining = 19, calls inlined = 19, statements flattened = 288 [2024-01-27 16:17:06,290 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 16:17:06,291 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 16:17:06,291 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 16:17:06,291 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 16:17:06,299 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:17:06" (1/1) ... [2024-01-27 16:17:06,300 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:17:06" (1/1) ... [2024-01-27 16:17:06,306 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:17:06" (1/1) ... [2024-01-27 16:17:06,333 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]. [2024-01-27 16:17:06,334 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:17:06" (1/1) ... [2024-01-27 16:17:06,334 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:17:06" (1/1) ... [2024-01-27 16:17:06,348 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:17:06" (1/1) ... [2024-01-27 16:17:06,352 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:17:06" (1/1) ... [2024-01-27 16:17:06,356 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:17:06" (1/1) ... [2024-01-27 16:17:06,358 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:17:06" (1/1) ... [2024-01-27 16:17:06,364 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 16:17:06,364 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 16:17:06,365 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 16:17:06,365 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 16:17:06,366 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:17:06" (1/1) ... [2024-01-27 16:17:06,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 16:17:06,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:17:06,402 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-27 16:17:06,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-27 16:17:06,442 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 16:17:06,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 16:17:06,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 16:17:06,443 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 16:17:06,443 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 16:17:06,444 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 16:17:06,444 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 16:17:06,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 16:17:06,444 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2024-01-27 16:17:06,444 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2024-01-27 16:17:06,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 16:17:06,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 16:17:06,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 16:17:06,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 16:17:06,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 16:17:06,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 16:17:06,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 16:17:06,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 16:17:06,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 16:17:06,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 16:17:06,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 16:17:06,448 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 16:17:06,761 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 16:17:06,763 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 16:17:07,175 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 16:17:07,175 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 16:17:07,421 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 16:17:07,422 INFO L320 CfgBuilder]: Removed 7 assume(true) statements. [2024-01-27 16:17:07,422 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 04:17:07 BoogieIcfgContainer [2024-01-27 16:17:07,422 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 16:17:07,425 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 16:17:07,425 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 16:17:07,428 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 16:17:07,428 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 04:17:05" (1/3) ... [2024-01-27 16:17:07,429 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be035eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 04:17:07, skipping insertion in model container [2024-01-27 16:17:07,429 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:17:06" (2/3) ... [2024-01-27 16:17:07,430 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be035eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 04:17:07, skipping insertion in model container [2024-01-27 16:17:07,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 04:17:07" (3/3) ... [2024-01-27 16:17:07,432 INFO L112 eAbstractionObserver]: Analyzing ICFG safestack_relacy.i [2024-01-27 16:17:07,442 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 16:17:07,452 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 16:17:07,452 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 16:17:07,453 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 16:17:07,554 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-01-27 16:17:07,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 63 transitions, 133 flow [2024-01-27 16:17:07,632 INFO L124 PetriNetUnfolderBase]: 12/67 cut-off events. [2024-01-27 16:17:07,632 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 16:17:07,636 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 128 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. [2024-01-27 16:17:07,637 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 63 transitions, 133 flow [2024-01-27 16:17:07,642 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 61 transitions, 126 flow [2024-01-27 16:17:07,657 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 16:17:07,666 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;@30f7866b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 16:17:07,667 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 16:17:07,677 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 16:17:07,677 INFO L124 PetriNetUnfolderBase]: 1/24 cut-off events. [2024-01-27 16:17:07,677 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 16:17:07,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:17:07,678 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:17:07,679 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-01-27 16:17:07,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:17:07,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1663881588, now seen corresponding path program 1 times [2024-01-27 16:17:07,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:17:07,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182271590] [2024-01-27 16:17:07,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:17:07,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:17:07,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:17:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 16:17:08,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:17:08,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182271590] [2024-01-27 16:17:08,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182271590] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:17:08,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:17:08,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 16:17:08,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230531113] [2024-01-27 16:17:08,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:17:08,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 16:17:08,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:17:08,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 16:17:08,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-27 16:17:08,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 63 [2024-01-27 16:17:08,146 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) [2024-01-27 16:17:08,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:17:08,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 63 [2024-01-27 16:17:08,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:17:08,403 INFO L124 PetriNetUnfolderBase]: 182/404 cut-off events. [2024-01-27 16:17:08,403 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 16:17:08,406 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 1409 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. [2024-01-27 16:17:08,411 INFO L140 encePairwiseOnDemand]: 54/63 looper letters, 49 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2024-01-27 16:17:08,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 60 transitions, 230 flow [2024-01-27 16:17:08,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 16:17:08,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 16:17:08,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-01-27 16:17:08,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3412698412698413 [2024-01-27 16:17:08,429 INFO L175 Difference]: Start difference. First operand has 53 places, 61 transitions, 126 flow. Second operand 4 states and 86 transitions. [2024-01-27 16:17:08,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 60 transitions, 230 flow [2024-01-27 16:17:08,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 60 transitions, 230 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 16:17:08,438 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 134 flow [2024-01-27 16:17:08,440 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} [2024-01-27 16:17:08,445 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 4 predicate places. [2024-01-27 16:17:08,445 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 134 flow [2024-01-27 16:17:08,446 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) [2024-01-27 16:17:08,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:17:08,446 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:17:08,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 16:17:08,447 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-01-27 16:17:08,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:17:08,448 INFO L85 PathProgramCache]: Analyzing trace with hash -247466052, now seen corresponding path program 1 times [2024-01-27 16:17:08,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:17:08,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393758680] [2024-01-27 16:17:08,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:17:08,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:17:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:17:08,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 16:17:08,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:17:08,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393758680] [2024-01-27 16:17:08,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393758680] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:17:08,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019656131] [2024-01-27 16:17:08,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:17:08,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:17:08,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:17:08,840 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) [2024-01-27 16:17:08,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 16:17:09,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:17:09,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 16:17:09,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:17:09,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 16:17:09,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:17:09,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 16:17:09,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019656131] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:17:09,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:17:09,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-01-27 16:17:09,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801656664] [2024-01-27 16:17:09,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:17:09,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-27 16:17:09,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:17:09,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-27 16:17:09,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-01-27 16:17:09,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 63 [2024-01-27 16:17:09,155 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) [2024-01-27 16:17:09,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:17:09,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 63 [2024-01-27 16:17:09,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:17:09,349 INFO L124 PetriNetUnfolderBase]: 182/405 cut-off events. [2024-01-27 16:17:09,349 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 16:17:09,353 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. [2024-01-27 16:17:09,356 INFO L140 encePairwiseOnDemand]: 57/63 looper letters, 48 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2024-01-27 16:17:09,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 61 transitions, 248 flow [2024-01-27 16:17:09,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 16:17:09,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 16:17:09,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-01-27 16:17:09,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2857142857142857 [2024-01-27 16:17:09,363 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 134 flow. Second operand 5 states and 90 transitions. [2024-01-27 16:17:09,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 61 transitions, 248 flow [2024-01-27 16:17:09,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 61 transitions, 242 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 16:17:09,367 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 154 flow [2024-01-27 16:17:09,367 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} [2024-01-27 16:17:09,368 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 8 predicate places. [2024-01-27 16:17:09,373 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 154 flow [2024-01-27 16:17:09,374 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) [2024-01-27 16:17:09,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:17:09,374 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:17:09,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 16:17:09,588 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 [2024-01-27 16:17:09,589 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-01-27 16:17:09,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:17:09,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1865916276, now seen corresponding path program 2 times [2024-01-27 16:17:09,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:17:09,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994421271] [2024-01-27 16:17:09,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:17:09,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:17:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 16:17:09,638 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 16:17:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 16:17:09,685 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 16:17:09,685 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 16:17:09,686 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-01-27 16:17:09,688 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-01-27 16:17:09,688 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-01-27 16:17:09,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 16:17:09,689 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2024-01-27 16:17:09,692 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 16:17:09,692 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-01-27 16:17:09,807 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 16:17:09,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 108 transitions, 232 flow [2024-01-27 16:17:09,822 INFO L124 PetriNetUnfolderBase]: 24/123 cut-off events. [2024-01-27 16:17:09,822 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-01-27 16:17:09,823 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 414 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. [2024-01-27 16:17:09,823 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 108 transitions, 232 flow [2024-01-27 16:17:09,825 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 108 transitions, 232 flow [2024-01-27 16:17:09,825 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 16:17:09,826 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;@30f7866b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 16:17:09,827 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-27 16:17:09,831 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 16:17:09,832 INFO L124 PetriNetUnfolderBase]: 4/44 cut-off events. [2024-01-27 16:17:09,832 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 16:17:09,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:17:09,832 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:17:09,832 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)] === [2024-01-27 16:17:09,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:17:09,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1326147582, now seen corresponding path program 1 times [2024-01-27 16:17:09,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:17:09,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083693348] [2024-01-27 16:17:09,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:17:09,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:17:09,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:17:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-27 16:17:09,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:17:09,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083693348] [2024-01-27 16:17:09,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083693348] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:17:09,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:17:09,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 16:17:09,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862578943] [2024-01-27 16:17:09,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:17:09,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 16:17:09,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:17:09,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 16:17:09,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-27 16:17:09,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 108 [2024-01-27 16:17:09,976 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) [2024-01-27 16:17:09,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:17:09,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 108 [2024-01-27 16:17:09,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:17:12,213 INFO L124 PetriNetUnfolderBase]: 12511/19356 cut-off events. [2024-01-27 16:17:12,213 INFO L125 PetriNetUnfolderBase]: For 260/260 co-relation queries the response was YES. [2024-01-27 16:17:12,252 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 115965 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. [2024-01-27 16:17:12,352 INFO L140 encePairwiseOnDemand]: 95/108 looper letters, 86 selfloop transitions, 4 changer transitions 0/103 dead transitions. [2024-01-27 16:17:12,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 103 transitions, 402 flow [2024-01-27 16:17:12,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 16:17:12,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 16:17:12,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 151 transitions. [2024-01-27 16:17:12,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34953703703703703 [2024-01-27 16:17:12,358 INFO L175 Difference]: Start difference. First operand has 90 places, 108 transitions, 232 flow. Second operand 4 states and 151 transitions. [2024-01-27 16:17:12,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 103 transitions, 402 flow [2024-01-27 16:17:12,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 103 transitions, 402 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 16:17:12,362 INFO L231 Difference]: Finished difference. Result has 94 places, 101 transitions, 232 flow [2024-01-27 16:17:12,362 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} [2024-01-27 16:17:12,365 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 4 predicate places. [2024-01-27 16:17:12,365 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 101 transitions, 232 flow [2024-01-27 16:17:12,365 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) [2024-01-27 16:17:12,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:17:12,366 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:17:12,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 16:17:12,366 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)] === [2024-01-27 16:17:12,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:17:12,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1482024006, now seen corresponding path program 1 times [2024-01-27 16:17:12,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:17:12,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638792750] [2024-01-27 16:17:12,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:17:12,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:17:12,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:17:12,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-27 16:17:12,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:17:12,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638792750] [2024-01-27 16:17:12,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638792750] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 16:17:12,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205387067] [2024-01-27 16:17:12,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:17:12,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 16:17:12,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:17:12,514 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) [2024-01-27 16:17:12,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 16:17:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:17:12,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 5 conjunts are in the unsatisfiable core [2024-01-27 16:17:12,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 16:17:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-27 16:17:12,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 16:17:12,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-27 16:17:12,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205387067] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 16:17:12,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 16:17:12,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-01-27 16:17:12,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630070385] [2024-01-27 16:17:12,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 16:17:12,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-27 16:17:12,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:17:12,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-27 16:17:12,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-01-27 16:17:12,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 108 [2024-01-27 16:17:12,848 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) [2024-01-27 16:17:12,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:17:12,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 108 [2024-01-27 16:17:12,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 16:17:14,821 INFO L124 PetriNetUnfolderBase]: 12511/19357 cut-off events. [2024-01-27 16:17:14,821 INFO L125 PetriNetUnfolderBase]: For 261/261 co-relation queries the response was YES. [2024-01-27 16:17:14,859 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 115962 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. [2024-01-27 16:17:14,934 INFO L140 encePairwiseOnDemand]: 102/108 looper letters, 85 selfloop transitions, 6 changer transitions 0/104 dead transitions. [2024-01-27 16:17:14,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 104 transitions, 420 flow [2024-01-27 16:17:14,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 16:17:14,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 16:17:14,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-01-27 16:17:14,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29074074074074074 [2024-01-27 16:17:14,936 INFO L175 Difference]: Start difference. First operand has 94 places, 101 transitions, 232 flow. Second operand 5 states and 157 transitions. [2024-01-27 16:17:14,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 104 transitions, 420 flow [2024-01-27 16:17:14,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 104 transitions, 414 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 16:17:14,940 INFO L231 Difference]: Finished difference. Result has 98 places, 102 transitions, 252 flow [2024-01-27 16:17:14,940 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} [2024-01-27 16:17:14,941 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 8 predicate places. [2024-01-27 16:17:14,941 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 102 transitions, 252 flow [2024-01-27 16:17:14,941 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) [2024-01-27 16:17:14,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:17:14,942 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:17:14,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 16:17:15,157 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 [2024-01-27 16:17:15,158 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)] === [2024-01-27 16:17:15,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:17:15,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1946156670, now seen corresponding path program 2 times [2024-01-27 16:17:15,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:17:15,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677864588] [2024-01-27 16:17:15,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:17:15,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:17:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 16:17:15,187 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 16:17:15,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 16:17:15,223 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 16:17:15,224 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 16:17:15,224 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-01-27 16:17:15,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-01-27 16:17:15,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-01-27 16:17:15,225 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-01-27 16:17:15,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 16:17:15,225 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2024-01-27 16:17:15,226 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 16:17:15,226 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-01-27 16:17:15,313 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-01-27 16:17:15,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 153 transitions, 333 flow [2024-01-27 16:17:15,333 INFO L124 PetriNetUnfolderBase]: 39/190 cut-off events. [2024-01-27 16:17:15,333 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-01-27 16:17:15,335 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 777 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. [2024-01-27 16:17:15,335 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 153 transitions, 333 flow [2024-01-27 16:17:15,337 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 153 transitions, 333 flow [2024-01-27 16:17:15,338 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 16:17:15,338 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;@30f7866b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 16:17:15,338 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-01-27 16:17:15,342 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 16:17:15,342 INFO L124 PetriNetUnfolderBase]: 6/48 cut-off events. [2024-01-27 16:17:15,342 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-01-27 16:17:15,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:17:15,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:17:15,343 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-01-27 16:17:15,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:17:15,343 INFO L85 PathProgramCache]: Analyzing trace with hash 236556307, now seen corresponding path program 1 times [2024-01-27 16:17:15,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:17:15,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152309640] [2024-01-27 16:17:15,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:17:15,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:17:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:17:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:17:15,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:17:15,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152309640] [2024-01-27 16:17:15,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152309640] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:17:15,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:17:15,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 16:17:15,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624160122] [2024-01-27 16:17:15,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:17:15,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 16:17:15,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:17:15,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 16:17:15,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-27 16:17:15,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 153 [2024-01-27 16:17:15,443 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) [2024-01-27 16:17:15,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:17:15,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 153 [2024-01-27 16:17:15,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand