./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_racefree.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/goblint-regression/28-race_reach_87-lists_racefree.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 7be9b237ca4111a24c77c67cce26f31a788af03984af96dee7353f79c789c2c1 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:26:11,914 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:26:11,970 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:26:11,977 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:26:11,977 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:26:11,999 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:26:12,000 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:26:12,001 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:26:12,001 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:26:12,016 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:26:12,016 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:26:12,016 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:26:12,017 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:26:12,017 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:26:12,017 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:26:12,018 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:26:12,018 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:26:12,018 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:26:12,018 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:26:12,018 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:26:12,018 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:26:12,019 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:26:12,019 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:26:12,019 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:26:12,019 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:26:12,019 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:26:12,019 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:26:12,019 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:26:12,020 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:26:12,020 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:26:12,020 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:26:12,020 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:26:12,020 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:26:12,020 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:26:12,020 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:26:12,021 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:26:12,021 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:26:12,021 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:26:12,021 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:26:12,021 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:26:12,021 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:26:12,022 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:26:12,022 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:26:12,022 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7be9b237ca4111a24c77c67cce26f31a788af03984af96dee7353f79c789c2c1 [2024-06-27 16:26:12,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:26:12,276 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:26:12,278 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:26:12,279 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:26:12,280 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:26:12,281 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_racefree.i [2024-06-27 16:26:13,379 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:26:13,620 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:26:13,620 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_racefree.i [2024-06-27 16:26:13,650 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17615af54/6612cb7b721e4d0e8036e6256d9e34c8/FLAG7eb9b6086 [2024-06-27 16:26:13,661 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17615af54/6612cb7b721e4d0e8036e6256d9e34c8 [2024-06-27 16:26:13,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:26:13,664 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:26:13,665 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:26:13,665 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:26:13,671 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:26:13,672 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:26:13" (1/1) ... [2024-06-27 16:26:13,672 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46b95c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:13, skipping insertion in model container [2024-06-27 16:26:13,673 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:26:13" (1/1) ... [2024-06-27 16:26:13,717 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:26:14,047 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_racefree.i[47038,47051] [2024-06-27 16:26:14,093 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:26:14,154 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:26:14,186 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_87-lists_racefree.i[47038,47051] [2024-06-27 16:26:14,205 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:26:14,259 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:26:14,260 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:14 WrapperNode [2024-06-27 16:26:14,260 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:26:14,261 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:26:14,262 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:26:14,262 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:26:14,267 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:14" (1/1) ... [2024-06-27 16:26:14,284 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:14" (1/1) ... [2024-06-27 16:26:14,306 INFO L138 Inliner]: procedures = 279, calls = 68, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 252 [2024-06-27 16:26:14,307 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:26:14,307 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:26:14,308 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:26:14,308 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:26:14,316 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:14" (1/1) ... [2024-06-27 16:26:14,317 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:14" (1/1) ... [2024-06-27 16:26:14,332 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:14" (1/1) ... [2024-06-27 16:26:14,354 INFO L175 MemorySlicer]: Split 35 memory accesses to 8 slices as follows [2, 14, 5, 4, 5, 1, 2, 2]. 40 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 0, 5, 0, 5, 0, 0, 0]. The 13 writes are split as follows [0, 8, 0, 2, 0, 1, 1, 1]. [2024-06-27 16:26:14,357 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:14" (1/1) ... [2024-06-27 16:26:14,358 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:14" (1/1) ... [2024-06-27 16:26:14,366 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:14" (1/1) ... [2024-06-27 16:26:14,370 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:14" (1/1) ... [2024-06-27 16:26:14,373 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:14" (1/1) ... [2024-06-27 16:26:14,376 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:14" (1/1) ... [2024-06-27 16:26:14,379 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:26:14,380 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:26:14,380 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:26:14,380 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:26:14,381 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:14" (1/1) ... [2024-06-27 16:26:14,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:26:14,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:26:14,420 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 16:26:14,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 16:26:14,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-06-27 16:26:14,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-06-27 16:26:14,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-06-27 16:26:14,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-06-27 16:26:14,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-06-27 16:26:14,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2024-06-27 16:26:14,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2024-06-27 16:26:14,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2024-06-27 16:26:14,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#7 [2024-06-27 16:26:14,457 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2024-06-27 16:26:14,457 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2024-06-27 16:26:14,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-06-27 16:26:14,457 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-06-27 16:26:14,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 16:26:14,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 16:26:14,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-06-27 16:26:14,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-06-27 16:26:14,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-06-27 16:26:14,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-06-27 16:26:14,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-06-27 16:26:14,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-06-27 16:26:14,458 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2024-06-27 16:26:14,458 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2024-06-27 16:26:14,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 16:26:14,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 16:26:14,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-06-27 16:26:14,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-06-27 16:26:14,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-06-27 16:26:14,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-06-27 16:26:14,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-06-27 16:26:14,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-06-27 16:26:14,460 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-06-27 16:26:14,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 16:26:14,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:26:14,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-06-27 16:26:14,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-06-27 16:26:14,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-06-27 16:26:14,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-06-27 16:26:14,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2024-06-27 16:26:14,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2024-06-27 16:26:14,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2024-06-27 16:26:14,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#7 [2024-06-27 16:26:14,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:26:14,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 16:26:14,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-06-27 16:26:14,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-06-27 16:26:14,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-06-27 16:26:14,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-06-27 16:26:14,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-06-27 16:26:14,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-06-27 16:26:14,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:26:14,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:26:14,465 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 16:26:14,612 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:26:14,614 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:26:14,916 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:26:14,916 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:26:15,096 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:26:15,096 INFO L320 CfgBuilder]: Removed 16 assume(true) statements. [2024-06-27 16:26:15,097 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:26:15 BoogieIcfgContainer [2024-06-27 16:26:15,097 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:26:15,098 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:26:15,098 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:26:15,101 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:26:15,101 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:26:13" (1/3) ... [2024-06-27 16:26:15,101 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5abec6fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:26:15, skipping insertion in model container [2024-06-27 16:26:15,102 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:14" (2/3) ... [2024-06-27 16:26:15,103 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5abec6fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:26:15, skipping insertion in model container [2024-06-27 16:26:15,103 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:26:15" (3/3) ... [2024-06-27 16:26:15,105 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_87-lists_racefree.i [2024-06-27 16:26:15,112 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:26:15,119 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:26:15,120 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 16:26:15,120 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:26:15,184 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-06-27 16:26:15,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 77 transitions, 174 flow [2024-06-27 16:26:15,310 INFO L124 PetriNetUnfolderBase]: 37/157 cut-off events. [2024-06-27 16:26:15,311 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-06-27 16:26:15,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 157 events. 37/157 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 573 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 80. Up to 8 conditions per place. [2024-06-27 16:26:15,315 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 77 transitions, 174 flow [2024-06-27 16:26:15,320 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 75 transitions, 164 flow [2024-06-27 16:26:15,331 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:26:15,340 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;@22b13d08, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:26:15,340 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-27 16:26:15,348 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:26:15,348 INFO L124 PetriNetUnfolderBase]: 1/21 cut-off events. [2024-06-27 16:26:15,348 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 16:26:15,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:15,349 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-06-27 16:26:15,349 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:26:15,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:15,353 INFO L85 PathProgramCache]: Analyzing trace with hash -2068486777, now seen corresponding path program 1 times [2024-06-27 16:26:15,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:15,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162765832] [2024-06-27 16:26:15,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:15,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:15,622 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 16:26:15,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:15,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162765832] [2024-06-27 16:26:15,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162765832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:26:15,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:26:15,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 16:26:15,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592050642] [2024-06-27 16:26:15,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:26:15,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:26:15,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:15,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:26:15,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:26:15,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 77 [2024-06-27 16:26:15,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 75 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:15,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:15,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 77 [2024-06-27 16:26:15,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:16,241 INFO L124 PetriNetUnfolderBase]: 2345/4510 cut-off events. [2024-06-27 16:26:16,242 INFO L125 PetriNetUnfolderBase]: For 134/134 co-relation queries the response was YES. [2024-06-27 16:26:16,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8332 conditions, 4510 events. 2345/4510 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 27499 event pairs, 2178 based on Foata normal form. 406/4208 useless extension candidates. Maximal degree in co-relation 7099. Up to 3752 conditions per place. [2024-06-27 16:26:16,281 INFO L140 encePairwiseOnDemand]: 62/77 looper letters, 47 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2024-06-27 16:26:16,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 64 transitions, 240 flow [2024-06-27 16:26:16,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:26:16,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:26:16,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-06-27 16:26:16,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46320346320346323 [2024-06-27 16:26:16,292 INFO L175 Difference]: Start difference. First operand has 63 places, 75 transitions, 164 flow. Second operand 3 states and 107 transitions. [2024-06-27 16:26:16,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 64 transitions, 240 flow [2024-06-27 16:26:16,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 64 transitions, 240 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 16:26:16,302 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 152 flow [2024-06-27 16:26:16,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-06-27 16:26:16,307 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2024-06-27 16:26:16,307 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 152 flow [2024-06-27 16:26:16,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:16,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:16,308 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:16,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:26:16,308 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:26:16,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:16,310 INFO L85 PathProgramCache]: Analyzing trace with hash -602517287, now seen corresponding path program 1 times [2024-06-27 16:26:16,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:16,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241191794] [2024-06-27 16:26:16,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:16,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:16,419 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 16:26:16,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:16,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241191794] [2024-06-27 16:26:16,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241191794] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:16,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019428868] [2024-06-27 16:26:16,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:16,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:16,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:26:16,432 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 16:26:16,433 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 16:26:16,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:16,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 3 conjunts are in the unsatisfiable core [2024-06-27 16:26:16,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:26:16,617 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 16:26:16,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:26:16,637 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 16:26:16,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019428868] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:26:16,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:26:16,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-06-27 16:26:16,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909341335] [2024-06-27 16:26:16,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:26:16,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 16:26:16,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:16,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 16:26:16,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 16:26:16,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 77 [2024-06-27 16:26:16,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 152 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:16,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:16,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 77 [2024-06-27 16:26:16,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:17,150 INFO L124 PetriNetUnfolderBase]: 2345/4513 cut-off events. [2024-06-27 16:26:17,150 INFO L125 PetriNetUnfolderBase]: For 134/134 co-relation queries the response was YES. [2024-06-27 16:26:17,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8348 conditions, 4513 events. 2345/4513 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 27500 event pairs, 2178 based on Foata normal form. 0/3805 useless extension candidates. Maximal degree in co-relation 8335. Up to 3752 conditions per place. [2024-06-27 16:26:17,168 INFO L140 encePairwiseOnDemand]: 74/77 looper letters, 47 selfloop transitions, 5 changer transitions 0/67 dead transitions. [2024-06-27 16:26:17,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 67 transitions, 268 flow [2024-06-27 16:26:17,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:26:17,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:26:17,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 16:26:17,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31385281385281383 [2024-06-27 16:26:17,172 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 152 flow. Second operand 6 states and 145 transitions. [2024-06-27 16:26:17,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 67 transitions, 268 flow [2024-06-27 16:26:17,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 67 transitions, 264 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-27 16:26:17,176 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 184 flow [2024-06-27 16:26:17,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=184, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2024-06-27 16:26:17,177 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 10 predicate places. [2024-06-27 16:26:17,177 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 184 flow [2024-06-27 16:26:17,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:17,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:17,178 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2024-06-27 16:26:17,207 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 16:26:17,389 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 16:26:17,390 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:26:17,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:17,391 INFO L85 PathProgramCache]: Analyzing trace with hash -885085689, now seen corresponding path program 2 times [2024-06-27 16:26:17,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:17,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028528886] [2024-06-27 16:26:17,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:17,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:17,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:17,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:17,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:17,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028528886] [2024-06-27 16:26:17,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028528886] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:17,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466585816] [2024-06-27 16:26:17,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:26:17,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:17,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:26:17,600 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 16:26:17,630 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 16:26:17,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:26:17,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:26:17,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 6 conjunts are in the unsatisfiable core [2024-06-27 16:26:17,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:26:17,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:17,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:26:17,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:17,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466585816] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:26:17,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:26:17,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-06-27 16:26:17,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105745188] [2024-06-27 16:26:17,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:26:17,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 16:26:17,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:17,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 16:26:17,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-06-27 16:26:17,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 77 [2024-06-27 16:26:17,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 184 flow. Second operand has 13 states, 13 states have (on average 16.307692307692307) internal successors, (212), 13 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:17,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:17,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 77 [2024-06-27 16:26:17,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:18,340 INFO L124 PetriNetUnfolderBase]: 2345/4519 cut-off events. [2024-06-27 16:26:18,340 INFO L125 PetriNetUnfolderBase]: For 154/154 co-relation queries the response was YES. [2024-06-27 16:26:18,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8385 conditions, 4519 events. 2345/4519 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 27472 event pairs, 2178 based on Foata normal form. 6/3818 useless extension candidates. Maximal degree in co-relation 8326. Up to 3752 conditions per place. [2024-06-27 16:26:18,357 INFO L140 encePairwiseOnDemand]: 74/77 looper letters, 47 selfloop transitions, 11 changer transitions 0/73 dead transitions. [2024-06-27 16:26:18,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 73 transitions, 336 flow [2024-06-27 16:26:18,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 16:26:18,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 16:26:18,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 244 transitions. [2024-06-27 16:26:18,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26406926406926406 [2024-06-27 16:26:18,362 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 184 flow. Second operand 12 states and 244 transitions. [2024-06-27 16:26:18,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 73 transitions, 336 flow [2024-06-27 16:26:18,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 73 transitions, 322 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 16:26:18,367 INFO L231 Difference]: Finished difference. Result has 89 places, 73 transitions, 254 flow [2024-06-27 16:26:18,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=254, PETRI_PLACES=89, PETRI_TRANSITIONS=73} [2024-06-27 16:26:18,368 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 26 predicate places. [2024-06-27 16:26:18,368 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 73 transitions, 254 flow [2024-06-27 16:26:18,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 16.307692307692307) internal successors, (212), 13 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:18,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:18,369 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2024-06-27 16:26:18,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 16:26:18,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-06-27 16:26:18,582 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:26:18,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:18,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1354815687, now seen corresponding path program 3 times [2024-06-27 16:26:18,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:18,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463442272] [2024-06-27 16:26:18,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:18,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:18,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:18,964 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:18,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:18,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463442272] [2024-06-27 16:26:18,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463442272] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:18,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324893138] [2024-06-27 16:26:18,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:26:18,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:18,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:26:18,966 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:26:18,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 16:27:42,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-06-27 16:27:42,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:27:42,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 12 conjunts are in the unsatisfiable core [2024-06-27 16:27:42,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:27:42,640 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:27:42,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:27:42,787 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:27:42,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324893138] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:27:42,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:27:42,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-06-27 16:27:42,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086448856] [2024-06-27 16:27:42,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:27:42,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-06-27 16:27:42,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:27:42,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-06-27 16:27:42,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-06-27 16:27:42,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 77 [2024-06-27 16:27:42,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 73 transitions, 254 flow. Second operand has 25 states, 25 states have (on average 16.16) internal successors, (404), 25 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:42,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:27:42,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 77 [2024-06-27 16:27:42,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:27:43,303 INFO L124 PetriNetUnfolderBase]: 2345/4531 cut-off events. [2024-06-27 16:27:43,303 INFO L125 PetriNetUnfolderBase]: For 597/597 co-relation queries the response was YES. [2024-06-27 16:27:43,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8469 conditions, 4531 events. 2345/4531 cut-off events. For 597/597 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 27474 event pairs, 2178 based on Foata normal form. 12/3836 useless extension candidates. Maximal degree in co-relation 8332. Up to 3752 conditions per place. [2024-06-27 16:27:43,320 INFO L140 encePairwiseOnDemand]: 74/77 looper letters, 47 selfloop transitions, 23 changer transitions 0/85 dead transitions. [2024-06-27 16:27:43,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 85 transitions, 490 flow [2024-06-27 16:27:43,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-06-27 16:27:43,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-06-27 16:27:43,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 442 transitions. [2024-06-27 16:27:43,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23917748917748918 [2024-06-27 16:27:43,323 INFO L175 Difference]: Start difference. First operand has 89 places, 73 transitions, 254 flow. Second operand 24 states and 442 transitions. [2024-06-27 16:27:43,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 85 transitions, 490 flow [2024-06-27 16:27:43,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 85 transitions, 418 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 16:27:43,328 INFO L231 Difference]: Finished difference. Result has 119 places, 85 transitions, 374 flow [2024-06-27 16:27:43,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=374, PETRI_PLACES=119, PETRI_TRANSITIONS=85} [2024-06-27 16:27:43,330 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 56 predicate places. [2024-06-27 16:27:43,330 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 85 transitions, 374 flow [2024-06-27 16:27:43,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 16.16) internal successors, (404), 25 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:43,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:27:43,331 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 2, 1, 1, 1, 1, 1] [2024-06-27 16:27:43,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 16:27:43,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:43,557 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:27:43,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:27:43,557 INFO L85 PathProgramCache]: Analyzing trace with hash -133757369, now seen corresponding path program 4 times [2024-06-27 16:27:43,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:27:43,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931246540] [2024-06-27 16:27:43,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:27:43,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:27:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:27:44,369 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:27:44,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:27:44,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931246540] [2024-06-27 16:27:44,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931246540] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:27:44,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509532570] [2024-06-27 16:27:44,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:27:44,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:44,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:27:44,371 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:27:44,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 16:27:44,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:27:44,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:27:44,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 1257 conjuncts, 24 conjunts are in the unsatisfiable core [2024-06-27 16:27:44,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:27:44,806 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:27:44,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:27:45,426 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:27:45,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509532570] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:27:45,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:27:45,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2024-06-27 16:27:45,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249299520] [2024-06-27 16:27:45,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:27:45,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-06-27 16:27:45,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:27:45,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-06-27 16:27:45,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-06-27 16:27:45,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 77 [2024-06-27 16:27:45,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 85 transitions, 374 flow. Second operand has 49 states, 49 states have (on average 16.081632653061224) internal successors, (788), 49 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:45,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:27:45,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 77 [2024-06-27 16:27:45,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:27:46,056 INFO L124 PetriNetUnfolderBase]: 2345/4555 cut-off events. [2024-06-27 16:27:46,057 INFO L125 PetriNetUnfolderBase]: For 5367/5367 co-relation queries the response was YES. [2024-06-27 16:27:46,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8613 conditions, 4555 events. 2345/4555 cut-off events. For 5367/5367 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 27474 event pairs, 2178 based on Foata normal form. 24/3872 useless extension candidates. Maximal degree in co-relation 8344. Up to 3752 conditions per place. [2024-06-27 16:27:46,079 INFO L140 encePairwiseOnDemand]: 74/77 looper letters, 47 selfloop transitions, 47 changer transitions 0/109 dead transitions. [2024-06-27 16:27:46,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 109 transitions, 754 flow [2024-06-27 16:27:46,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-06-27 16:27:46,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-06-27 16:27:46,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 838 transitions. [2024-06-27 16:27:46,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.22673160173160173 [2024-06-27 16:27:46,083 INFO L175 Difference]: Start difference. First operand has 119 places, 85 transitions, 374 flow. Second operand 48 states and 838 transitions. [2024-06-27 16:27:46,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 109 transitions, 754 flow [2024-06-27 16:27:46,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 109 transitions, 610 flow, removed 61 selfloop flow, removed 11 redundant places. [2024-06-27 16:27:46,090 INFO L231 Difference]: Finished difference. Result has 179 places, 109 transitions, 614 flow [2024-06-27 16:27:46,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=614, PETRI_PLACES=179, PETRI_TRANSITIONS=109} [2024-06-27 16:27:46,092 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 116 predicate places. [2024-06-27 16:27:46,092 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 109 transitions, 614 flow [2024-06-27 16:27:46,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 16.081632653061224) internal successors, (788), 49 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:46,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:27:46,093 INFO L208 CegarLoopForPetriNet]: trace histogram [46, 2, 1, 1, 1, 1, 1] [2024-06-27 16:27:46,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-06-27 16:27:46,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:46,306 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:27:46,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:27:46,306 INFO L85 PathProgramCache]: Analyzing trace with hash 2062197063, now seen corresponding path program 5 times [2024-06-27 16:27:46,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:27:46,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080769885] [2024-06-27 16:27:46,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:27:46,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:27:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:27:48,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:27:48,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:27:48,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080769885] [2024-06-27 16:27:48,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080769885] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:27:48,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113228849] [2024-06-27 16:27:48,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:27:48,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:48,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:27:48,979 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-06-27 16:27:49,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process Killed by 15