./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl/simpl-str-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8c2bbc92 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/chl/simpl-str-symm.wvr.c -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/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 1689ff305da7a320f79022a4d9481743076d0629 ................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-05 20:56:18,243 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-05 20:56:18,248 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-05 20:56:18,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-05 20:56:18,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-05 20:56:18,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-05 20:56:18,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-05 20:56:18,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-05 20:56:18,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-05 20:56:18,335 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-05 20:56:18,336 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-05 20:56:18,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-05 20:56:18,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-05 20:56:18,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-05 20:56:18,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-05 20:56:18,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-05 20:56:18,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-05 20:56:18,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-05 20:56:18,358 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-05 20:56:18,365 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-05 20:56:18,367 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-05 20:56:18,368 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-05 20:56:18,370 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-05 20:56:18,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-05 20:56:18,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-05 20:56:18,380 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-05 20:56:18,381 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-05 20:56:18,382 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-05 20:56:18,382 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-05 20:56:18,383 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-05 20:56:18,384 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-05 20:56:18,385 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-05 20:56:18,386 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-05 20:56:18,386 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-05 20:56:18,388 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-05 20:56:18,388 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-05 20:56:18,389 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-05 20:56:18,389 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-05 20:56:18,389 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-05 20:56:18,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-05 20:56:18,391 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-05 20:56:18,392 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-05 20:56:18,419 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-05 20:56:18,419 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-05 20:56:18,420 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-05 20:56:18,420 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-05 20:56:18,421 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-05 20:56:18,421 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-05 20:56:18,422 INFO L138 SettingsManager]: * Use SBE=true [2021-10-05 20:56:18,422 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-05 20:56:18,422 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-05 20:56:18,423 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-05 20:56:18,423 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-05 20:56:18,423 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-05 20:56:18,423 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-05 20:56:18,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-05 20:56:18,424 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-05 20:56:18,424 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-05 20:56:18,424 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-05 20:56:18,425 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-05 20:56:18,425 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-05 20:56:18,425 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-05 20:56:18,425 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-05 20:56:18,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-05 20:56:18,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-05 20:56:18,426 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-05 20:56:18,426 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-05 20:56:18,427 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-05 20:56:18,427 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-05 20:56:18,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-05 20:56:18,427 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-05 20:56:18,428 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-05 20:56:18,428 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1689ff305da7a320f79022a4d9481743076d0629 [2021-10-05 20:56:18,824 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-05 20:56:18,853 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-05 20:56:18,856 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-05 20:56:18,858 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-05 20:56:18,861 INFO L275 PluginConnector]: CDTParser initialized [2021-10-05 20:56:18,862 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl/simpl-str-symm.wvr.c [2021-10-05 20:56:18,937 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6249c7932/9c30d9e17c8f47eb8989f6853e19eb0c/FLAGc6a0cad0e [2021-10-05 20:56:19,564 INFO L306 CDTParser]: Found 1 translation units. [2021-10-05 20:56:19,566 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/chl/simpl-str-symm.wvr.c [2021-10-05 20:56:19,576 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6249c7932/9c30d9e17c8f47eb8989f6853e19eb0c/FLAGc6a0cad0e [2021-10-05 20:56:19,885 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6249c7932/9c30d9e17c8f47eb8989f6853e19eb0c [2021-10-05 20:56:19,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-05 20:56:19,896 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-05 20:56:19,899 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-05 20:56:19,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-05 20:56:19,906 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-05 20:56:19,907 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 08:56:19" (1/1) ... [2021-10-05 20:56:19,909 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e40ca3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:56:19, skipping insertion in model container [2021-10-05 20:56:19,909 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 08:56:19" (1/1) ... [2021-10-05 20:56:19,917 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-05 20:56:19,950 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-05 20:56:20,137 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/chl/simpl-str-symm.wvr.c[2216,2229] [2021-10-05 20:56:20,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-05 20:56:20,151 INFO L203 MainTranslator]: Completed pre-run [2021-10-05 20:56:20,175 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/chl/simpl-str-symm.wvr.c[2216,2229] [2021-10-05 20:56:20,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-05 20:56:20,201 INFO L208 MainTranslator]: Completed translation [2021-10-05 20:56:20,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:56:20 WrapperNode [2021-10-05 20:56:20,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-05 20:56:20,203 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-05 20:56:20,204 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-05 20:56:20,204 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-05 20:56:20,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:56:20" (1/1) ... [2021-10-05 20:56:20,220 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:56:20" (1/1) ... [2021-10-05 20:56:20,260 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-05 20:56:20,261 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-05 20:56:20,262 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-05 20:56:20,262 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-05 20:56:20,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:56:20" (1/1) ... [2021-10-05 20:56:20,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:56:20" (1/1) ... [2021-10-05 20:56:20,278 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:56:20" (1/1) ... [2021-10-05 20:56:20,279 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:56:20" (1/1) ... [2021-10-05 20:56:20,301 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:56:20" (1/1) ... [2021-10-05 20:56:20,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:56:20" (1/1) ... [2021-10-05 20:56:20,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:56:20" (1/1) ... [2021-10-05 20:56:20,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-05 20:56:20,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-05 20:56:20,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-05 20:56:20,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-05 20:56:20,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:56:20" (1/1) ... [2021-10-05 20:56:20,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-05 20:56:20,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 20:56:20,366 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-05 20:56:20,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-05 20:56:20,445 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-05 20:56:20,446 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-05 20:56:20,447 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-05 20:56:20,447 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-05 20:56:20,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-05 20:56:20,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-05 20:56:20,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-05 20:56:20,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-05 20:56:20,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-05 20:56:20,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-05 20:56:20,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-05 20:56:20,453 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-05 20:56:20,860 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-05 20:56:20,860 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-05 20:56:20,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 08:56:20 BoogieIcfgContainer [2021-10-05 20:56:20,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-05 20:56:20,865 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-05 20:56:20,865 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-05 20:56:20,869 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-05 20:56:20,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.10 08:56:19" (1/3) ... [2021-10-05 20:56:20,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a66d904 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 08:56:20, skipping insertion in model container [2021-10-05 20:56:20,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:56:20" (2/3) ... [2021-10-05 20:56:20,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a66d904 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 08:56:20, skipping insertion in model container [2021-10-05 20:56:20,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 08:56:20" (3/3) ... [2021-10-05 20:56:20,874 INFO L111 eAbstractionObserver]: Analyzing ICFG simpl-str-symm.wvr.c [2021-10-05 20:56:20,881 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-05 20:56:20,881 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-05 20:56:20,881 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-05 20:56:20,881 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-05 20:56:20,916 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,916 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,916 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,917 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,917 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,917 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,918 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,918 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,918 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,918 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,919 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,919 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,919 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,919 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,920 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,920 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,920 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,921 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,921 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,921 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,921 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,922 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,922 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,922 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,923 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,924 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,924 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,924 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,924 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,925 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,925 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,925 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,925 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,926 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,926 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,926 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,926 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,927 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,927 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,927 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,927 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,928 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,928 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,928 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,929 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,929 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,929 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,929 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,933 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,933 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,934 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,934 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~ite6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,934 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,939 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,939 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,939 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,940 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,940 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~ite5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:56:20,947 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-05 20:56:21,001 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-05 20:56:21,010 INFO L339 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, mConcurrency=FINITE_AUTOMATA, 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, mLoopAccelerationTechnique=FAST_UPR [2021-10-05 20:56:21,010 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-05 20:56:21,027 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-05 20:56:21,041 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 107 transitions, 230 flow [2021-10-05 20:56:21,044 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 107 transitions, 230 flow [2021-10-05 20:56:21,046 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 105 places, 107 transitions, 230 flow [2021-10-05 20:56:21,106 INFO L129 PetriNetUnfolder]: 9/105 cut-off events. [2021-10-05 20:56:21,106 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-05 20:56:21,111 INFO L84 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 105 events. 9/105 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 105 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 56. Up to 2 conditions per place. [2021-10-05 20:56:21,114 INFO L116 LiptonReduction]: Number of co-enabled transitions 1088 [2021-10-05 20:56:25,190 INFO L131 LiptonReduction]: Checked pairs total: 1131 [2021-10-05 20:56:25,191 INFO L133 LiptonReduction]: Total number of compositions: 117 [2021-10-05 20:56:25,201 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 14 transitions, 44 flow [2021-10-05 20:56:25,212 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 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) [2021-10-05 20:56:25,214 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 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) [2021-10-05 20:56:25,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-05 20:56:25,220 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 20:56:25,220 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 20:56:25,221 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 20:56:25,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 20:56:25,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1241579727, now seen corresponding path program 1 times [2021-10-05 20:56:25,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 20:56:25,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854804984] [2021-10-05 20:56:25,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 20:56:25,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 20:56:25,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 20:56:25,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:56:25,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 20:56:25,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854804984] [2021-10-05 20:56:25,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854804984] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 20:56:25,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 20:56:25,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-05 20:56:25,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647529912] [2021-10-05 20:56:25,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-05 20:56:25,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 20:56:25,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-05 20:56:25,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-05 20:56:25,814 INFO L87 Difference]: Start difference. First operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 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) Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-10-05 20:56:25,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 20:56:25,889 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2021-10-05 20:56:25,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-05 20:56:25,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) Word has length 11 [2021-10-05 20:56:25,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 20:56:25,900 INFO L225 Difference]: With dead ends: 25 [2021-10-05 20:56:25,900 INFO L226 Difference]: Without dead ends: 14 [2021-10-05 20:56:25,902 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-05 20:56:25,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-05 20:56:25,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-05 20:56:25,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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) [2021-10-05 20:56:25,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-10-05 20:56:25,931 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2021-10-05 20:56:25,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 20:56:25,931 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-10-05 20:56:25,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-10-05 20:56:25,932 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-10-05 20:56:25,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-05 20:56:25,933 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 20:56:25,933 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 20:56:25,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-05 20:56:25,934 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 20:56:25,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 20:56:25,934 INFO L82 PathProgramCache]: Analyzing trace with hash 207105185, now seen corresponding path program 2 times [2021-10-05 20:56:25,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 20:56:25,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659293606] [2021-10-05 20:56:25,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 20:56:25,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 20:56:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 20:56:26,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:56:26,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 20:56:26,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659293606] [2021-10-05 20:56:26,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659293606] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 20:56:26,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 20:56:26,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-05 20:56:26,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142725802] [2021-10-05 20:56:26,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-05 20:56:26,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 20:56:26,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-05 20:56:26,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-05 20:56:26,163 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-10-05 20:56:26,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 20:56:26,210 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2021-10-05 20:56:26,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-05 20:56:26,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) Word has length 11 [2021-10-05 20:56:26,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 20:56:26,211 INFO L225 Difference]: With dead ends: 13 [2021-10-05 20:56:26,211 INFO L226 Difference]: Without dead ends: 0 [2021-10-05 20:56:26,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-05 20:56:26,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-05 20:56:26,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-05 20:56:26,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-10-05 20:56:26,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-05 20:56:26,213 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2021-10-05 20:56:26,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 20:56:26,213 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-05 20:56:26,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-10-05 20:56:26,214 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-05 20:56:26,214 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-05 20:56:26,217 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-05 20:56:26,217 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-05 20:56:26,218 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-05 20:56:26,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-05 20:56:26,222 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-05 20:56:26,223 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-05 20:56:26,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.10 08:56:26 BasicIcfg [2021-10-05 20:56:26,225 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-05 20:56:26,226 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-05 20:56:26,226 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-05 20:56:26,226 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-05 20:56:26,227 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 08:56:20" (3/4) ... [2021-10-05 20:56:26,230 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-05 20:56:26,237 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-05 20:56:26,238 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-05 20:56:26,243 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-10-05 20:56:26,243 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-05 20:56:26,243 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-05 20:56:26,244 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-05 20:56:26,294 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-05 20:56:26,294 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-05 20:56:26,298 INFO L168 Benchmark]: Toolchain (without parser) took 6405.18 ms. Allocated memory was 48.2 MB in the beginning and 79.7 MB in the end (delta: 31.5 MB). Free memory was 24.7 MB in the beginning and 37.0 MB in the end (delta: -12.3 MB). Peak memory consumption was 22.4 MB. Max. memory is 16.1 GB. [2021-10-05 20:56:26,299 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 48.2 MB. Free memory is still 29.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-05 20:56:26,301 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.20 ms. Allocated memory was 48.2 MB in the beginning and 65.0 MB in the end (delta: 16.8 MB). Free memory was 24.4 MB in the beginning and 42.5 MB in the end (delta: -18.1 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2021-10-05 20:56:26,302 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.76 ms. Allocated memory is still 65.0 MB. Free memory was 42.5 MB in the beginning and 40.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 20:56:26,303 INFO L168 Benchmark]: Boogie Preprocessor took 59.11 ms. Allocated memory is still 65.0 MB. Free memory was 40.7 MB in the beginning and 39.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 20:56:26,304 INFO L168 Benchmark]: RCFGBuilder took 541.85 ms. Allocated memory is still 65.0 MB. Free memory was 39.6 MB in the beginning and 46.6 MB in the end (delta: -7.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-05 20:56:26,306 INFO L168 Benchmark]: TraceAbstraction took 5360.38 ms. Allocated memory was 65.0 MB in the beginning and 79.7 MB in the end (delta: 14.7 MB). Free memory was 46.1 MB in the beginning and 39.9 MB in the end (delta: 6.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 16.1 GB. [2021-10-05 20:56:26,306 INFO L168 Benchmark]: Witness Printer took 68.48 ms. Allocated memory is still 79.7 MB. Free memory was 39.9 MB in the beginning and 37.0 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-05 20:56:26,315 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 48.2 MB. Free memory is still 29.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 303.20 ms. Allocated memory was 48.2 MB in the beginning and 65.0 MB in the end (delta: 16.8 MB). Free memory was 24.4 MB in the beginning and 42.5 MB in the end (delta: -18.1 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 56.76 ms. Allocated memory is still 65.0 MB. Free memory was 42.5 MB in the beginning and 40.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 59.11 ms. Allocated memory is still 65.0 MB. Free memory was 40.7 MB in the beginning and 39.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 541.85 ms. Allocated memory is still 65.0 MB. Free memory was 39.6 MB in the beginning and 46.6 MB in the end (delta: -7.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5360.38 ms. Allocated memory was 65.0 MB in the beginning and 79.7 MB in the end (delta: 14.7 MB). Free memory was 46.1 MB in the beginning and 39.9 MB in the end (delta: 6.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 16.1 GB. * Witness Printer took 68.48 ms. Allocated memory is still 79.7 MB. Free memory was 39.9 MB in the beginning and 37.0 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4146.7ms, 105 PlacesBefore, 21 PlacesAfterwards, 107 TransitionsBefore, 14 TransitionsAfterwards, 1088 CoEnabledTransitionPairs, 6 FixpointIterations, 54 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 15 ConcurrentYvCompositions, 9 ChoiceCompositions, 117 TotalNumberOfCompositions, 1131 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1131, positive: 1131, positive conditional: 0, positive unconditional: 1131, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 876, positive: 876, positive conditional: 0, positive unconditional: 876, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 876, positive: 876, positive conditional: 0, positive unconditional: 876, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1131, positive: 255, positive conditional: 0, positive unconditional: 255, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 876, unknown conditional: 0, unknown unconditional: 876] , Statistics on independence cache: Total cache size (in pairs): 12, Positive cache size: 12, Positive conditional cache size: 0, Positive unconditional cache size: 12, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 66]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 131 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 5222.4ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 8.0ms, AutomataDifference: 161.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 4202.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 27 SDtfs, 19 SDslu, 15 SDs, 0 SdLazy, 10 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 150.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 17.0ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 17.6ms SsaConstructionTime, 172.7ms SatisfiabilityAnalysisTime, 485.9ms InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 490 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-05 20:56:26,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...