./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-complex/elimination_backoff_stack.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/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 ../sv-benchmarks/c/pthread-complex/elimination_backoff_stack.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.graphml --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 115e066856baca443b44a0f6b5ce54f74ba2b2820e5612bf4393c0e893767d55 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:13:45,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:13:45,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:13:45,223 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:13:45,224 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:13:45,225 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:13:45,227 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:13:45,228 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:13:45,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:13:45,233 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:13:45,233 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:13:45,235 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:13:45,235 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:13:45,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:13:45,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:13:45,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:13:45,240 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:13:45,241 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:13:45,242 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:13:45,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:13:45,245 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:13:45,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:13:45,247 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:13:45,248 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:13:45,249 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:13:45,255 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:13:45,255 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:13:45,255 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:13:45,257 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:13:45,257 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:13:45,258 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:13:45,258 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:13:45,259 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:13:45,260 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:13:45,260 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:13:45,261 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:13:45,261 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:13:45,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:13:45,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:13:45,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:13:45,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:13:45,264 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:13:45,265 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:13:45,288 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:13:45,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:13:45,289 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:13:45,289 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:13:45,289 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:13:45,290 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:13:45,290 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:13:45,290 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:13:45,290 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:13:45,291 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:13:45,291 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:13:45,291 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:13:45,291 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:13:45,292 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:13:45,292 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:13:45,292 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:13:45,292 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:13:45,292 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:13:45,292 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:13:45,292 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:13:45,293 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:13:45,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:13:45,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:13:45,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:13:45,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:13:45,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:13:45,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:13:45,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:13:45,294 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:13:45,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:13:45,294 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:13:45,294 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:13:45,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:13:45,295 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 115e066856baca443b44a0f6b5ce54f74ba2b2820e5612bf4393c0e893767d55 [2022-07-19 21:13:45,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:13:45,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:13:45,515 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:13:45,516 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:13:45,516 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:13:45,517 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-complex/elimination_backoff_stack.i [2022-07-19 21:13:45,563 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26c724af9/94ffcc3feecd456ea3774735d99c95a9/FLAG53c22b9c9 [2022-07-19 21:13:46,020 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:13:46,021 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/elimination_backoff_stack.i [2022-07-19 21:13:46,040 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26c724af9/94ffcc3feecd456ea3774735d99c95a9/FLAG53c22b9c9 [2022-07-19 21:13:46,051 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/26c724af9/94ffcc3feecd456ea3774735d99c95a9 [2022-07-19 21:13:46,055 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:13:46,056 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:13:46,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:13:46,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:13:46,061 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:13:46,062 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:13:46" (1/1) ... [2022-07-19 21:13:46,063 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65496bdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:46, skipping insertion in model container [2022-07-19 21:13:46,063 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:13:46" (1/1) ... [2022-07-19 21:13:46,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:13:46,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:13:46,674 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/elimination_backoff_stack.i[63494,63507] [2022-07-19 21:13:46,723 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:13:46,730 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:13:46,785 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/elimination_backoff_stack.i[63494,63507] [2022-07-19 21:13:46,803 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:13:46,867 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:13:46,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:46 WrapperNode [2022-07-19 21:13:46,867 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:13:46,868 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:13:46,869 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:13:46,869 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:13:46,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:46" (1/1) ... [2022-07-19 21:13:46,900 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:46" (1/1) ... [2022-07-19 21:13:46,999 INFO L137 Inliner]: procedures = 397, calls = 214, calls flagged for inlining = 52, calls inlined = 211, statements flattened = 3713 [2022-07-19 21:13:46,999 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:13:47,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:13:47,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:13:47,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:13:47,006 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:46" (1/1) ... [2022-07-19 21:13:47,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:46" (1/1) ... [2022-07-19 21:13:47,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:46" (1/1) ... [2022-07-19 21:13:47,041 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:46" (1/1) ... [2022-07-19 21:13:47,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:46" (1/1) ... [2022-07-19 21:13:47,128 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:46" (1/1) ... [2022-07-19 21:13:47,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:46" (1/1) ... [2022-07-19 21:13:47,157 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:13:47,158 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:13:47,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:13:47,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:13:47,160 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:46" (1/1) ... [2022-07-19 21:13:47,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:13:47,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:13:47,184 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 21:13:47,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 21:13:47,214 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-19 21:13:47,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:13:47,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-19 21:13:47,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:13:47,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:13:47,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-19 21:13:47,215 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush2 [2022-07-19 21:13:47,215 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush2 [2022-07-19 21:13:47,215 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush1 [2022-07-19 21:13:47,215 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush1 [2022-07-19 21:13:47,215 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush0 [2022-07-19 21:13:47,216 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush0 [2022-07-19 21:13:47,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:13:47,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:13:47,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:13:47,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-19 21:13:47,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-19 21:13:47,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:13:47,216 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop5 [2022-07-19 21:13:47,216 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop5 [2022-07-19 21:13:47,217 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop6 [2022-07-19 21:13:47,217 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop6 [2022-07-19 21:13:47,217 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop3 [2022-07-19 21:13:47,217 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop3 [2022-07-19 21:13:47,217 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop4 [2022-07-19 21:13:47,217 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop4 [2022-07-19 21:13:47,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:13:47,220 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:13:47,640 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:13:47,642 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:13:49,786 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:13:51,365 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:13:51,365 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-19 21:13:51,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:13:51 BoogieIcfgContainer [2022-07-19 21:13:51,369 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:13:51,370 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:13:51,370 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:13:51,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:13:51,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:13:46" (1/3) ... [2022-07-19 21:13:51,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c06bc5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:13:51, skipping insertion in model container [2022-07-19 21:13:51,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:13:46" (2/3) ... [2022-07-19 21:13:51,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c06bc5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:13:51, skipping insertion in model container [2022-07-19 21:13:51,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:13:51" (3/3) ... [2022-07-19 21:13:51,374 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_backoff_stack.i [2022-07-19 21:13:51,378 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:13:51,384 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:13:51,384 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2022-07-19 21:13:51,384 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:13:51,883 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-19 21:13:51,920 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 2446 places, 2571 transitions, 5177 flow [2022-07-19 21:13:54,575 INFO L129 PetriNetUnfolder]: 147/2564 cut-off events. [2022-07-19 21:13:54,575 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:13:54,818 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2586 conditions, 2564 events. 147/2564 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 17345 event pairs, 0 based on Foata normal form. 0/2410 useless extension candidates. Maximal degree in co-relation 2509. Up to 6 conditions per place. [2022-07-19 21:13:54,818 INFO L82 GeneralOperation]: Start removeDead. Operand has 2446 places, 2571 transitions, 5177 flow [2022-07-19 21:13:54,885 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 2439 places, 2564 transitions, 5149 flow [2022-07-19 21:13:54,892 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:13:54,897 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=LoopsAndPotentialCycles, 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@79ee34c4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7f69e8b2 [2022-07-19 21:13:54,898 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2022-07-19 21:13:54,981 INFO L129 PetriNetUnfolder]: 1/411 cut-off events. [2022-07-19 21:13:54,981 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:13:54,981 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:13:54,982 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:13:54,982 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting instrPush0Err0ASSERT_VIOLATIONERROR_FUNCTION === [instrPop3Err0ASSERT_VIOLATIONERROR_FUNCTION, instrPop4Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 18 more)] === [2022-07-19 21:13:54,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:13:54,987 INFO L85 PathProgramCache]: Analyzing trace with hash 576268037, now seen corresponding path program 1 times [2022-07-19 21:13:54,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:13:54,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473096932] [2022-07-19 21:13:54,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:13:54,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:13:55,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:13:55,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:13:55,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:13:55,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473096932] [2022-07-19 21:13:55,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473096932] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:13:55,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:13:55,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:13:55,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914794730] [2022-07-19 21:13:55,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:13:55,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:13:55,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:13:55,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:13:55,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:13:55,384 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 2412 out of 2571 [2022-07-19 21:13:55,398 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 2439 places, 2564 transitions, 5149 flow. Second operand has 4 states, 4 states have (on average 2414.75) internal successors, (9659), 4 states have internal predecessors, (9659), 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) [2022-07-19 21:13:55,398 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:13:55,399 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2412 of 2571 [2022-07-19 21:13:55,400 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand