./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_fe06f806-1139-48d4-9dd8-4b54045388a8/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_fe06f806-1139-48d4-9dd8-4b54045388a8/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_fe06f806-1139-48d4-9dd8-4b54045388a8/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_fe06f806-1139-48d4-9dd8-4b54045388a8/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_fe06f806-1139-48d4-9dd8-4b54045388a8/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_fe06f806-1139-48d4-9dd8-4b54045388a8/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 58087887a1dd564559680784309457f518906cbf ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:24:44,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:24:44,217 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:24:44,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:24:44,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:24:44,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:24:44,300 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:24:44,305 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:24:44,309 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:24:44,316 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:24:44,317 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:24:44,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:24:44,322 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:24:44,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:24:44,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:24:44,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:24:44,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:24:44,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:24:44,342 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:24:44,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:24:44,351 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:24:44,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:24:44,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:24:44,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:24:44,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:24:44,368 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:24:44,369 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:24:44,371 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:24:44,372 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:24:44,373 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:24:44,374 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:24:44,375 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:24:44,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:24:44,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:24:44,380 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:24:44,380 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:24:44,381 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:24:44,381 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:24:44,381 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:24:44,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:24:44,385 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:24:44,390 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_fe06f806-1139-48d4-9dd8-4b54045388a8/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:24:44,441 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:24:44,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:24:44,442 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:24:44,443 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:24:44,443 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:24:44,443 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:24:44,443 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:24:44,444 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:24:44,444 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:24:44,444 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:24:44,445 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:24:44,446 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:24:44,446 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:24:44,446 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:24:44,446 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:24:44,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:24:44,447 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:24:44,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:24:44,448 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:24:44,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:24:44,448 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:24:44,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:24:44,449 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:24:44,449 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:24:44,449 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:24:44,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:24:44,450 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:24:44,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:24:44,450 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:24:44,452 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:24:44,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:24:44,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:24:44,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:24:44,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:24:44,453 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:24:44,453 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:24:44,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:24:44,454 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:24:44,454 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:24:44,454 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:24:44,455 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_fe06f806-1139-48d4-9dd8-4b54045388a8/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_fe06f806-1139-48d4-9dd8-4b54045388a8/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 58087887a1dd564559680784309457f518906cbf [2020-11-28 07:24:44,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:24:44,746 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:24:44,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:24:44,750 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:24:44,758 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:24:44,759 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_fe06f806-1139-48d4-9dd8-4b54045388a8/bin/utaipan/../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2020-11-28 07:24:44,835 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fe06f806-1139-48d4-9dd8-4b54045388a8/bin/utaipan/data/c0c3fd791/947f7b23d9594f62b631ec31e8e63de7/FLAGd57a97563 [2020-11-28 07:24:45,534 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:24:45,535 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_fe06f806-1139-48d4-9dd8-4b54045388a8/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2020-11-28 07:24:45,563 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fe06f806-1139-48d4-9dd8-4b54045388a8/bin/utaipan/data/c0c3fd791/947f7b23d9594f62b631ec31e8e63de7/FLAGd57a97563 [2020-11-28 07:24:45,779 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_fe06f806-1139-48d4-9dd8-4b54045388a8/bin/utaipan/data/c0c3fd791/947f7b23d9594f62b631ec31e8e63de7 [2020-11-28 07:24:45,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:24:45,783 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:24:45,785 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:24:45,785 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:24:45,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:24:45,791 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:24:45" (1/1) ... [2020-11-28 07:24:45,793 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a1d766 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:45, skipping insertion in model container [2020-11-28 07:24:45,793 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:24:45" (1/1) ... [2020-11-28 07:24:45,808 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:24:45,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:24:46,084 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2020-11-28 07:24:46,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:24:46,227 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:24:46,242 WARN L612 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2020-11-28 07:24:46,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:24:46,346 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:24:46,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:46 WrapperNode [2020-11-28 07:24:46,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:24:46,348 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:24:46,348 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:24:46,348 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:24:46,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:46" (1/1) ... [2020-11-28 07:24:46,372 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:46" (1/1) ... [2020-11-28 07:24:46,394 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:24:46,395 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:24:46,395 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:24:46,396 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:24:46,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:46" (1/1) ... [2020-11-28 07:24:46,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:46" (1/1) ... [2020-11-28 07:24:46,408 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:46" (1/1) ... [2020-11-28 07:24:46,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:46" (1/1) ... [2020-11-28 07:24:46,414 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:46" (1/1) ... [2020-11-28 07:24:46,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:46" (1/1) ... [2020-11-28 07:24:46,419 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:46" (1/1) ... [2020-11-28 07:24:46,422 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:24:46,423 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:24:46,424 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:24:46,424 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:24:46,432 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:46" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fe06f806-1139-48d4-9dd8-4b54045388a8/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:24:46,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 07:24:46,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:24:46,501 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-28 07:24:46,502 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2020-11-28 07:24:46,502 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2020-11-28 07:24:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:24:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 07:24:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:24:46,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-28 07:24:46,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:24:46,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:24:46,508 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2020-11-28 07:24:46,508 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2020-11-28 07:24:46,509 WARN L208 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-28 07:24:47,296 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:24:47,297 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-28 07:24:47,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:24:47 BoogieIcfgContainer [2020-11-28 07:24:47,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:24:47,300 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:24:47,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:24:47,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:24:47,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:24:45" (1/3) ... [2020-11-28 07:24:47,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6854369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:24:47, skipping insertion in model container [2020-11-28 07:24:47,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:24:46" (2/3) ... [2020-11-28 07:24:47,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6854369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:24:47, skipping insertion in model container [2020-11-28 07:24:47,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:24:47" (3/3) ... [2020-11-28 07:24:47,307 INFO L111 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2020-11-28 07:24:47,318 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-28 07:24:47,318 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:24:47,323 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:24:47,323 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-28 07:24:47,356 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,356 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,357 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,357 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,357 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork0_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,357 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,357 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,358 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork0_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,358 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork0_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,358 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork0_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,358 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork0_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,359 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork0_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,359 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork0_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,359 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork0_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,359 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork0_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,359 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,360 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,360 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork0_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,360 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork0_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,360 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,361 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,361 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,361 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,362 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,362 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,362 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,362 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,362 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,363 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,363 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,363 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,363 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,364 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,364 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,364 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,364 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,364 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,365 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,365 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,365 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,365 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,365 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,366 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,366 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,366 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,366 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,367 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork3_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,367 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork3_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,367 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,367 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,367 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,368 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,368 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,368 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,368 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,369 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,369 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,369 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,369 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,369 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,370 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,370 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,372 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,372 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,373 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,373 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork0_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,373 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,373 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,373 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,373 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork0_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,374 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,374 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork0_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,374 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork0_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,376 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,377 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,377 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,377 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,377 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,377 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,382 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,382 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,382 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,383 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,383 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~lx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,383 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,383 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~ly~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,383 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_reach_error_#t~nondet2.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,383 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,384 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork2_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,384 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork2_reach_error_#t~nondet2.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,386 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,386 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,386 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,386 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,386 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,387 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-28 07:24:47,403 INFO L149 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2020-11-28 07:24:47,412 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-11-28 07:24:47,431 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:24:47,431 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:24:47,432 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:24:47,432 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:24:47,432 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:24:47,432 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:24:47,432 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:24:47,432 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:24:47,444 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-28 07:24:47,446 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 118 transitions, 304 flow [2020-11-28 07:24:47,449 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 118 transitions, 304 flow [2020-11-28 07:24:47,450 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 115 places, 118 transitions, 304 flow [2020-11-28 07:24:47,511 INFO L129 PetriNetUnfolder]: 21/152 cut-off events. [2020-11-28 07:24:47,512 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2020-11-28 07:24:47,522 INFO L80 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 152 events. 21/152 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 366 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 105. Up to 12 conditions per place. [2020-11-28 07:24:47,530 INFO L116 LiptonReduction]: Number of co-enabled transitions 3778 [2020-11-28 07:24:49,352 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-11-28 07:24:50,644 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 92 [2020-11-28 07:24:50,923 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-11-28 07:24:51,248 INFO L131 LiptonReduction]: Checked pairs total: 29471 [2020-11-28 07:24:51,248 INFO L133 LiptonReduction]: Total number of compositions: 92 [2020-11-28 07:24:51,254 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 60 places, 61 transitions, 190 flow [2020-11-28 07:24:51,930 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 6574 states. [2020-11-28 07:24:51,932 INFO L276 IsEmpty]: Start isEmpty. Operand 6574 states. [2020-11-28 07:24:51,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 07:24:51,939 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:51,940 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:24:51,940 INFO L429 AbstractCegarLoop]: === Iteration 1 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-11-28 07:24:51,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:51,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1338902325, now seen corresponding path program 1 times [2020-11-28 07:24:51,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:24:51,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928965500] [2020-11-28 07:24:51,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:24:52,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:52,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:52,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928965500] [2020-11-28 07:24:52,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:24:52,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:24:52,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301040156] [2020-11-28 07:24:52,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:24:52,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:24:52,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:24:52,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:24:52,227 INFO L87 Difference]: Start difference. First operand 6574 states. Second operand 5 states. [2020-11-28 07:24:52,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:24:52,730 INFO L93 Difference]: Finished difference Result 14569 states and 50345 transitions. [2020-11-28 07:24:52,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 07:24:52,731 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-11-28 07:24:52,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:24:52,877 INFO L225 Difference]: With dead ends: 14569 [2020-11-28 07:24:52,877 INFO L226 Difference]: Without dead ends: 10609 [2020-11-28 07:24:52,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-28 07:24:53,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10609 states. [2020-11-28 07:24:53,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10609 to 6772. [2020-11-28 07:24:53,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6772 states. [2020-11-28 07:24:53,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6772 states to 6772 states and 23787 transitions. [2020-11-28 07:24:53,439 INFO L78 Accepts]: Start accepts. Automaton has 6772 states and 23787 transitions. Word has length 9 [2020-11-28 07:24:53,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:24:53,440 INFO L481 AbstractCegarLoop]: Abstraction has 6772 states and 23787 transitions. [2020-11-28 07:24:53,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:24:53,441 INFO L276 IsEmpty]: Start isEmpty. Operand 6772 states and 23787 transitions. [2020-11-28 07:24:53,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 07:24:53,443 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:53,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:24:53,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:24:53,444 INFO L429 AbstractCegarLoop]: === Iteration 2 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-11-28 07:24:53,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:53,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1805071211, now seen corresponding path program 1 times [2020-11-28 07:24:53,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:24:53,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609499954] [2020-11-28 07:24:53,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:24:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:53,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:53,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609499954] [2020-11-28 07:24:53,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:24:53,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:24:53,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714456958] [2020-11-28 07:24:53,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:24:53,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:24:53,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:24:53,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:24:53,539 INFO L87 Difference]: Start difference. First operand 6772 states and 23787 transitions. Second operand 4 states. [2020-11-28 07:24:53,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:24:53,799 INFO L93 Difference]: Finished difference Result 9895 states and 30480 transitions. [2020-11-28 07:24:53,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:24:53,804 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-28 07:24:53,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:24:53,977 INFO L225 Difference]: With dead ends: 9895 [2020-11-28 07:24:53,977 INFO L226 Difference]: Without dead ends: 9767 [2020-11-28 07:24:53,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:24:54,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2020-11-28 07:24:54,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 7252. [2020-11-28 07:24:54,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7252 states. [2020-11-28 07:24:54,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7252 states to 7252 states and 23057 transitions. [2020-11-28 07:24:54,388 INFO L78 Accepts]: Start accepts. Automaton has 7252 states and 23057 transitions. Word has length 11 [2020-11-28 07:24:54,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:24:54,388 INFO L481 AbstractCegarLoop]: Abstraction has 7252 states and 23057 transitions. [2020-11-28 07:24:54,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:24:54,389 INFO L276 IsEmpty]: Start isEmpty. Operand 7252 states and 23057 transitions. [2020-11-28 07:24:54,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 07:24:54,397 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:54,397 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:24:54,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:24:54,398 INFO L429 AbstractCegarLoop]: === Iteration 3 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-11-28 07:24:54,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:54,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1087803173, now seen corresponding path program 2 times [2020-11-28 07:24:54,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:24:54,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677098855] [2020-11-28 07:24:54,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:24:54,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:54,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:54,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677098855] [2020-11-28 07:24:54,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:24:54,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:24:54,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183740326] [2020-11-28 07:24:54,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:24:54,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:24:54,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:24:54,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:24:54,476 INFO L87 Difference]: Start difference. First operand 7252 states and 23057 transitions. Second operand 3 states. [2020-11-28 07:24:54,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:24:54,516 INFO L93 Difference]: Finished difference Result 3235 states and 8368 transitions. [2020-11-28 07:24:54,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:24:54,517 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-11-28 07:24:54,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:24:54,526 INFO L225 Difference]: With dead ends: 3235 [2020-11-28 07:24:54,527 INFO L226 Difference]: Without dead ends: 3171 [2020-11-28 07:24:54,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:24:54,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3171 states. [2020-11-28 07:24:54,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3171 to 3171. [2020-11-28 07:24:54,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3171 states. [2020-11-28 07:24:54,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3171 states to 3171 states and 8234 transitions. [2020-11-28 07:24:54,686 INFO L78 Accepts]: Start accepts. Automaton has 3171 states and 8234 transitions. Word has length 11 [2020-11-28 07:24:54,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:24:54,687 INFO L481 AbstractCegarLoop]: Abstraction has 3171 states and 8234 transitions. [2020-11-28 07:24:54,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:24:54,687 INFO L276 IsEmpty]: Start isEmpty. Operand 3171 states and 8234 transitions. [2020-11-28 07:24:54,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-28 07:24:54,688 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:54,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:24:54,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:24:54,688 INFO L429 AbstractCegarLoop]: === Iteration 4 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-11-28 07:24:54,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:54,690 INFO L82 PathProgramCache]: Analyzing trace with hash -850585031, now seen corresponding path program 1 times [2020-11-28 07:24:54,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:24:54,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964068000] [2020-11-28 07:24:54,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:24:54,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:54,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:54,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964068000] [2020-11-28 07:24:54,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:24:54,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:24:54,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566931852] [2020-11-28 07:24:54,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:24:54,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:24:54,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:24:54,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:24:54,792 INFO L87 Difference]: Start difference. First operand 3171 states and 8234 transitions. Second operand 5 states. [2020-11-28 07:24:54,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:24:54,978 INFO L93 Difference]: Finished difference Result 4389 states and 11053 transitions. [2020-11-28 07:24:54,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 07:24:54,979 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-11-28 07:24:54,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:24:54,989 INFO L225 Difference]: With dead ends: 4389 [2020-11-28 07:24:54,989 INFO L226 Difference]: Without dead ends: 3713 [2020-11-28 07:24:54,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-28 07:24:55,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3713 states. [2020-11-28 07:24:55,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3713 to 2879. [2020-11-28 07:24:55,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2879 states. [2020-11-28 07:24:55,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 7415 transitions. [2020-11-28 07:24:55,160 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 7415 transitions. Word has length 13 [2020-11-28 07:24:55,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:24:55,162 INFO L481 AbstractCegarLoop]: Abstraction has 2879 states and 7415 transitions. [2020-11-28 07:24:55,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:24:55,162 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 7415 transitions. [2020-11-28 07:24:55,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 07:24:55,163 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:55,164 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:24:55,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:24:55,164 INFO L429 AbstractCegarLoop]: === Iteration 5 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-11-28 07:24:55,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:55,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1940976462, now seen corresponding path program 1 times [2020-11-28 07:24:55,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:24:55,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455326985] [2020-11-28 07:24:55,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:24:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:55,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455326985] [2020-11-28 07:24:55,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:24:55,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:24:55,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178419698] [2020-11-28 07:24:55,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:24:55,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:24:55,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:24:55,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:24:55,263 INFO L87 Difference]: Start difference. First operand 2879 states and 7415 transitions. Second operand 5 states. [2020-11-28 07:24:55,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:24:55,438 INFO L93 Difference]: Finished difference Result 3539 states and 8886 transitions. [2020-11-28 07:24:55,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 07:24:55,438 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-11-28 07:24:55,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:24:55,447 INFO L225 Difference]: With dead ends: 3539 [2020-11-28 07:24:55,447 INFO L226 Difference]: Without dead ends: 3370 [2020-11-28 07:24:55,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-28 07:24:55,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3370 states. [2020-11-28 07:24:55,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3370 to 2535. [2020-11-28 07:24:55,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2535 states. [2020-11-28 07:24:55,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2535 states to 2535 states and 6495 transitions. [2020-11-28 07:24:55,545 INFO L78 Accepts]: Start accepts. Automaton has 2535 states and 6495 transitions. Word has length 16 [2020-11-28 07:24:55,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:24:55,545 INFO L481 AbstractCegarLoop]: Abstraction has 2535 states and 6495 transitions. [2020-11-28 07:24:55,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:24:55,545 INFO L276 IsEmpty]: Start isEmpty. Operand 2535 states and 6495 transitions. [2020-11-28 07:24:55,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 07:24:55,547 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:55,547 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:24:55,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:24:55,547 INFO L429 AbstractCegarLoop]: === Iteration 6 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-11-28 07:24:55,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:55,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1057754047, now seen corresponding path program 1 times [2020-11-28 07:24:55,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:24:55,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436457443] [2020-11-28 07:24:55,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:24:55,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:24:55,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:24:55,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436457443] [2020-11-28 07:24:55,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:24:55,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:24:55,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182761976] [2020-11-28 07:24:55,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:24:55,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:24:55,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:24:55,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:24:55,637 INFO L87 Difference]: Start difference. First operand 2535 states and 6495 transitions. Second operand 5 states. [2020-11-28 07:24:55,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:24:55,833 INFO L93 Difference]: Finished difference Result 3089 states and 7765 transitions. [2020-11-28 07:24:55,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 07:24:55,834 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-11-28 07:24:55,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:24:55,843 INFO L225 Difference]: With dead ends: 3089 [2020-11-28 07:24:55,844 INFO L226 Difference]: Without dead ends: 2789 [2020-11-28 07:24:55,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-28 07:24:55,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2789 states. [2020-11-28 07:24:55,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2789 to 2048. [2020-11-28 07:24:55,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2048 states. [2020-11-28 07:24:55,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 5239 transitions. [2020-11-28 07:24:55,919 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 5239 transitions. Word has length 16 [2020-11-28 07:24:55,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:24:55,920 INFO L481 AbstractCegarLoop]: Abstraction has 2048 states and 5239 transitions. [2020-11-28 07:24:55,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:24:55,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 5239 transitions. [2020-11-28 07:24:55,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-28 07:24:55,924 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:24:55,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:24:55,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 07:24:55,925 INFO L429 AbstractCegarLoop]: === Iteration 7 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-11-28 07:24:55,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:24:55,926 INFO L82 PathProgramCache]: Analyzing trace with hash 613997448, now seen corresponding path program 1 times [2020-11-28 07:24:55,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:24:55,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962482104] [2020-11-28 07:24:55,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:24:55,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:24:55,966 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:24:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:24:55,992 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:24:56,038 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:24:56,038 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:24:56,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 07:24:56,062 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-11-28 07:24:56,062 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-11-28 07:24:56,067 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-11-28 07:24:56,067 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-11-28 07:24:56,067 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-11-28 07:24:56,068 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-11-28 07:24:56,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:24:56 BasicIcfg [2020-11-28 07:24:56,142 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:24:56,143 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:24:56,143 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:24:56,143 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:24:56,144 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:24:47" (3/4) ... [2020-11-28 07:24:56,146 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:24:56,159 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-11-28 07:24:56,159 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-11-28 07:24:56,162 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-11-28 07:24:56,163 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-11-28 07:24:56,166 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-11-28 07:24:56,166 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-11-28 07:24:56,281 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_fe06f806-1139-48d4-9dd8-4b54045388a8/bin/utaipan/witness.graphml [2020-11-28 07:24:56,281 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:24:56,283 INFO L168 Benchmark]: Toolchain (without parser) took 10499.23 ms. Allocated memory was 102.8 MB in the beginning and 645.9 MB in the end (delta: 543.2 MB). Free memory was 71.8 MB in the beginning and 477.5 MB in the end (delta: -405.7 MB). Peak memory consumption was 136.8 MB. Max. memory is 16.1 GB. [2020-11-28 07:24:56,283 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 102.8 MB. Free memory is still 61.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:24:56,284 INFO L168 Benchmark]: CACSL2BoogieTranslator took 562.54 ms. Allocated memory is still 102.8 MB. Free memory was 71.5 MB in the beginning and 58.2 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:24:56,284 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.63 ms. Allocated memory is still 102.8 MB. Free memory was 58.2 MB in the beginning and 56.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:24:56,285 INFO L168 Benchmark]: Boogie Preprocessor took 27.39 ms. Allocated memory is still 102.8 MB. Free memory was 56.1 MB in the beginning and 54.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:24:56,285 INFO L168 Benchmark]: RCFGBuilder took 875.46 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 54.9 MB in the beginning and 89.9 MB in the end (delta: -35.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:24:56,286 INFO L168 Benchmark]: TraceAbstraction took 8841.76 ms. Allocated memory was 123.7 MB in the beginning and 645.9 MB in the end (delta: 522.2 MB). Free memory was 89.3 MB in the beginning and 485.9 MB in the end (delta: -396.6 MB). Peak memory consumption was 250.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:24:56,286 INFO L168 Benchmark]: Witness Printer took 138.68 ms. Allocated memory is still 645.9 MB. Free memory was 485.9 MB in the beginning and 477.5 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:24:56,289 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 102.8 MB. Free memory is still 61.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 562.54 ms. Allocated memory is still 102.8 MB. Free memory was 71.5 MB in the beginning and 58.2 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.63 ms. Allocated memory is still 102.8 MB. Free memory was 58.2 MB in the beginning and 56.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.39 ms. Allocated memory is still 102.8 MB. Free memory was 56.1 MB in the beginning and 54.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 875.46 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 54.9 MB in the beginning and 89.9 MB in the end (delta: -35.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8841.76 ms. Allocated memory was 123.7 MB in the beginning and 645.9 MB in the end (delta: 522.2 MB). Free memory was 89.3 MB in the beginning and 485.9 MB in the end (delta: -396.6 MB). Peak memory consumption was 250.6 MB. Max. memory is 16.1 GB. * Witness Printer took 138.68 ms. Allocated memory is still 645.9 MB. Free memory was 485.9 MB in the beginning and 477.5 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 3338 VarBasedMoverChecksPositive, 185 VarBasedMoverChecksNegative, 118 SemBasedMoverChecksPositive, 67 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.7s, 924 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 3.7s, 115 PlacesBefore, 60 PlacesAfterwards, 118 TransitionsBefore, 61 TransitionsAfterwards, 3778 CoEnabledTransitionPairs, 9 FixpointIterations, 27 TrivialSequentialCompositions, 51 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 12 ConcurrentYvCompositions, 2 ChoiceCompositions, 92 TotalNumberOfCompositions, 29471 MoverChecksTotal - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L704] 0 int w=0, r=0, x, y; [L748] 0 pthread_t t1, t2, t3, t4; [L749] FCALL, FORK 0 pthread_create(&t1, 0, writer, 0) VAL [r=0, w=0, x=0, y=0] [L750] FCALL, FORK 0 pthread_create(&t2, 0, reader, 0) VAL [r=0, w=0, x=0, y=0] [L724] 2 int l; [L725] CALL 2 __VERIFIER_atomic_take_read_lock() [L710] CALL 2 assume_abort_if_not(w==0) [L3] COND TRUE 2 !cond [L710] RET 2 assume_abort_if_not(w==0) [L711] 2 r = r+1 [L725] RET 2 __VERIFIER_atomic_take_read_lock() [L727] 2 l = x VAL [r=1, w=0, x=0, y=0] [L730] 2 y = l VAL [r=1, w=0, x=0, y=0] [L733] 2 int ly = y; VAL [r=1, w=0, x=0, y=0] [L736] 2 int lx = x; VAL [r=1, w=0, x=0, y=0] [L738] COND FALSE 2 !(!(ly == lx)) [L740] 2 l = r-1 VAL [r=1, w=0, x=0, y=0] [L751] FCALL, FORK 0 pthread_create(&t3, 0, writer, 0) VAL [r=1, w=0, x=0, y=0] [L752] FCALL, FORK 0 pthread_create(&t4, 0, reader, 0) VAL [r=1, w=0, x=0, y=0] [L724] 4 int l; [L725] CALL 4 __VERIFIER_atomic_take_read_lock() [L710] CALL 4 assume_abort_if_not(w==0) [L3] COND TRUE 4 !cond [L710] RET 4 assume_abort_if_not(w==0) [L711] 4 r = r+1 [L725] RET 4 __VERIFIER_atomic_take_read_lock() [L727] 4 l = x VAL [r=2, w=0, x=0, y=0] [L730] 4 y = l VAL [r=2, w=0, x=0, y=0] [L743] 2 r = l [L745] 2 return 0; [L714] CALL 3 __VERIFIER_atomic_take_write_lock() [L706] CALL 3 assume_abort_if_not(w==0 && r==0) [L3] COND TRUE 3 !cond [L706] RET 3 assume_abort_if_not(w==0 && r==0) [L707] 3 w = 1 [L714] RET 3 __VERIFIER_atomic_take_write_lock() [L716] 3 x = 3 VAL [r=0, w=1, x=3, y=0] [L733] 4 int ly = y; VAL [r=0, w=1, x=3, y=0] [L736] 4 int lx = x; [L738] COND TRUE 4 !(ly == lx) [L16] COND FALSE 4 !(0) [L16] 4 __assert_fail ("0", "read_write_lock-2.c", 7, __extension__ __PRETTY_FUNCTION__) VAL [r=0, w=1, x=3, y=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 78 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.6s, OverallIterations: 7, TraceHistogramMax: 1, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.4s, HoareTripleCheckerStatistics: 674 SDtfs, 728 SDslu, 1047 SDs, 0 SdLazy, 377 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7252occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 6 MinimizatonAttempts, 8762 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 98 NumberOfCodeBlocks, 98 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 70 ConstructedInterpolants, 0 QuantifiedInterpolants, 1548 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...