./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/mutex_lock_int.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_518d8d06-6209-46fb-bd71-85279bf48e15/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_518d8d06-6209-46fb-bd71-85279bf48e15/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_518d8d06-6209-46fb-bd71-85279bf48e15/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_518d8d06-6209-46fb-bd71-85279bf48e15/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/mutex_lock_int.i -s /tmp/vcloud-vcloud-master/worker/working_dir_518d8d06-6209-46fb-bd71-85279bf48e15/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_518d8d06-6209-46fb-bd71-85279bf48e15/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c976dd79cabe443ac09b5b35c5674998e922b27b ....................................................................................................................................................................................................................................................................... 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 0.1.24-cad4683 [2019-10-22 08:57:07,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:57:07,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:57:07,289 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:57:07,289 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:57:07,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:57:07,291 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:57:07,292 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:57:07,293 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:57:07,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:57:07,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:57:07,295 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:57:07,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:57:07,296 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:57:07,297 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:57:07,298 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:57:07,299 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:57:07,300 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:57:07,301 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:57:07,303 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:57:07,304 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:57:07,305 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:57:07,306 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:57:07,307 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:57:07,309 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:57:07,309 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:57:07,309 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:57:07,310 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:57:07,310 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:57:07,311 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:57:07,312 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:57:07,312 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:57:07,313 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:57:07,314 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:57:07,315 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:57:07,315 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:57:07,315 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:57:07,316 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:57:07,316 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:57:07,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:57:07,317 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:57:07,318 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_518d8d06-6209-46fb-bd71-85279bf48e15/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 08:57:07,329 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:57:07,329 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:57:07,330 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:57:07,330 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:57:07,331 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:57:07,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:57:07,331 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 08:57:07,331 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 08:57:07,331 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 08:57:07,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:57:07,332 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 08:57:07,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 08:57:07,332 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 08:57:07,332 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 08:57:07,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:57:07,332 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:57:07,333 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 08:57:07,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:57:07,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:57:07,333 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 08:57:07,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 08:57:07,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:57:07,333 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:57:07,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 08:57:07,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 08:57:07,334 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 08:57:07,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 08:57:07,334 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 08:57:07,334 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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/working_dir_518d8d06-6209-46fb-bd71-85279bf48e15/bin/uautomizer 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(__VERIFIER_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 -> c976dd79cabe443ac09b5b35c5674998e922b27b [2019-10-22 08:57:07,357 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:57:07,367 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:57:07,370 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:57:07,372 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:57:07,372 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:57:07,373 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_518d8d06-6209-46fb-bd71-85279bf48e15/bin/uautomizer/../../sv-benchmarks/c/ldv-regression/mutex_lock_int.i [2019-10-22 08:57:07,425 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_518d8d06-6209-46fb-bd71-85279bf48e15/bin/uautomizer/data/28d09006b/40058019f4084956ba289074b645108e/FLAG8cff0bb56 [2019-10-22 08:57:07,784 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:57:07,784 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_518d8d06-6209-46fb-bd71-85279bf48e15/sv-benchmarks/c/ldv-regression/mutex_lock_int.i [2019-10-22 08:57:07,788 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_518d8d06-6209-46fb-bd71-85279bf48e15/bin/uautomizer/data/28d09006b/40058019f4084956ba289074b645108e/FLAG8cff0bb56 [2019-10-22 08:57:07,799 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_518d8d06-6209-46fb-bd71-85279bf48e15/bin/uautomizer/data/28d09006b/40058019f4084956ba289074b645108e [2019-10-22 08:57:07,801 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:57:07,803 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:57:07,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:57:07,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:57:07,807 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:57:07,808 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:57:07" (1/1) ... [2019-10-22 08:57:07,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@242fcdfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:07, skipping insertion in model container [2019-10-22 08:57:07,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:57:07" (1/1) ... [2019-10-22 08:57:07,817 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:57:07,829 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:57:07,941 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:57:07,951 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:57:08,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:57:08,039 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:57:08,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:08 WrapperNode [2019-10-22 08:57:08,040 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:57:08,041 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:57:08,041 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:57:08,041 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:57:08,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:08" (1/1) ... [2019-10-22 08:57:08,057 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:08" (1/1) ... [2019-10-22 08:57:08,074 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:57:08,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:57:08,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:57:08,075 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:57:08,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:08" (1/1) ... [2019-10-22 08:57:08,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:08" (1/1) ... [2019-10-22 08:57:08,083 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:08" (1/1) ... [2019-10-22 08:57:08,084 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:08" (1/1) ... [2019-10-22 08:57:08,086 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:08" (1/1) ... [2019-10-22 08:57:08,087 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:08" (1/1) ... [2019-10-22 08:57:08,088 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:08" (1/1) ... [2019-10-22 08:57:08,089 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:57:08,090 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:57:08,090 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:57:08,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:57:08,091 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_518d8d06-6209-46fb-bd71-85279bf48e15/bin/uautomizer/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 [2019-10-22 08:57:08,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-22 08:57:08,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:57:08,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:57:08,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-22 08:57:08,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 08:57:08,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 08:57:08,375 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:57:08,375 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-10-22 08:57:08,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:57:08 BoogieIcfgContainer [2019-10-22 08:57:08,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:57:08,377 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 08:57:08,377 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 08:57:08,388 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 08:57:08,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 08:57:07" (1/3) ... [2019-10-22 08:57:08,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@921be43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:57:08, skipping insertion in model container [2019-10-22 08:57:08,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:08" (2/3) ... [2019-10-22 08:57:08,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@921be43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:57:08, skipping insertion in model container [2019-10-22 08:57:08,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:57:08" (3/3) ... [2019-10-22 08:57:08,394 INFO L109 eAbstractionObserver]: Analyzing ICFG mutex_lock_int.i [2019-10-22 08:57:08,405 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 08:57:08,412 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-10-22 08:57:08,422 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-10-22 08:57:08,450 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 08:57:08,451 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 08:57:08,451 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 08:57:08,451 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:57:08,451 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:57:08,452 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 08:57:08,452 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:57:08,452 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 08:57:08,468 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-10-22 08:57:08,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-10-22 08:57:08,476 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:08,477 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-10-22 08:57:08,479 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:08,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:08,485 INFO L82 PathProgramCache]: Analyzing trace with hash 925605, now seen corresponding path program 1 times [2019-10-22 08:57:08,493 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:08,494 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317642511] [2019-10-22 08:57:08,494 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:08,494 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:08,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:08,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:08,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:08,662 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317642511] [2019-10-22 08:57:08,663 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:08,663 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 08:57:08,663 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256227277] [2019-10-22 08:57:08,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 08:57:08,668 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:08,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 08:57:08,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 08:57:08,682 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2019-10-22 08:57:08,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:08,708 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2019-10-22 08:57:08,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 08:57:08,709 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-10-22 08:57:08,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:08,722 INFO L225 Difference]: With dead ends: 25 [2019-10-22 08:57:08,723 INFO L226 Difference]: Without dead ends: 8 [2019-10-22 08:57:08,726 INFO L600 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 [2019-10-22 08:57:08,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-10-22 08:57:08,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-10-22 08:57:08,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-10-22 08:57:08,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2019-10-22 08:57:08,751 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 4 [2019-10-22 08:57:08,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:08,751 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2019-10-22 08:57:08,752 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 08:57:08,752 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2019-10-22 08:57:08,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-10-22 08:57:08,752 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:08,752 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:08,753 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:08,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:08,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1810629644, now seen corresponding path program 1 times [2019-10-22 08:57:08,753 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:08,753 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751808248] [2019-10-22 08:57:08,753 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:08,754 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:08,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:08,800 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:57:08,801 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 08:57:08,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 08:57:08 BoogieIcfgContainer [2019-10-22 08:57:08,825 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 08:57:08,826 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 08:57:08,826 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 08:57:08,826 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 08:57:08,827 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:57:08" (3/4) ... [2019-10-22 08:57:08,829 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 08:57:08,873 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_518d8d06-6209-46fb-bd71-85279bf48e15/bin/uautomizer/witness.graphml [2019-10-22 08:57:08,874 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 08:57:08,876 INFO L168 Benchmark]: Toolchain (without parser) took 1072.47 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 942.0 MB in the beginning and 1.1 GB in the end (delta: -153.0 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:57:08,876 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:57:08,877 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.47 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -199.9 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:08,878 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.10 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:08,878 INFO L168 Benchmark]: Boogie Preprocessor took 14.83 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:08,879 INFO L168 Benchmark]: RCFGBuilder took 286.31 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 15.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:08,879 INFO L168 Benchmark]: TraceAbstraction took 448.58 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.6 MB). Peak memory consumption was 25.6 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:08,880 INFO L168 Benchmark]: Witness Printer took 48.01 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:08,883 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 236.47 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -199.9 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 34.10 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.83 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 286.31 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 15.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 448.58 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.6 MB). Peak memory consumption was 25.6 MB. Max. memory is 11.5 GB. * Witness Printer took 48.01 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L30] int m; [L31] m = 0 [L18] EXPR \read(*a) [L18] COND FALSE !(*a == 1) [L19] *a = 1 [L18] EXPR \read(*a) [L18] COND TRUE *a == 1 [L14] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 2 error locations. Result: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 11 SDtfs, 0 SDslu, 7 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 15 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...