./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/stateful_check.c --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_974e8fe7-4877-42f8-9720-d81be163b3dc/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_974e8fe7-4877-42f8-9720-d81be163b3dc/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_974e8fe7-4877-42f8-9720-d81be163b3dc/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_974e8fe7-4877-42f8-9720-d81be163b3dc/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/stateful_check.c -s /tmp/vcloud-vcloud-master/worker/run_dir_974e8fe7-4877-42f8-9720-d81be163b3dc/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_974e8fe7-4877-42f8-9720-d81be163b3dc/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 a342581b7572d5ebcb4a58d0a914c795d7fcf5cd .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 [2020-11-22 12:54:06,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:54:06,395 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:54:06,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:54:06,448 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:54:06,450 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:54:06,452 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:54:06,455 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:54:06,458 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:54:06,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:54:06,460 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:54:06,462 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:54:06,465 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:54:06,466 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:54:06,468 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:54:06,470 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:54:06,471 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:54:06,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:54:06,475 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:54:06,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:54:06,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:54:06,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:54:06,487 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:54:06,488 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:54:06,492 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:54:06,493 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:54:06,493 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:54:06,495 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:54:06,495 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:54:06,497 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:54:06,497 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:54:06,499 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:54:06,500 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:54:06,501 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:54:06,502 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:54:06,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:54:06,503 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:54:06,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:54:06,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:54:06,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:54:06,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:54:06,507 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_974e8fe7-4877-42f8-9720-d81be163b3dc/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 12:54:06,536 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:54:06,537 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:54:06,538 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:54:06,538 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:54:06,538 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:54:06,538 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:54:06,539 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:54:06,539 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:54:06,539 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:54:06,540 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:54:06,540 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:54:06,540 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:54:06,540 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:54:06,541 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:54:06,541 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:54:06,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:54:06,542 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 12:54:06,542 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:54:06,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 12:54:06,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:54:06,543 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 12:54:06,543 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:54:06,544 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 12:54:06,544 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 12:54:06,544 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 12:54:06,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 12:54:06,545 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:54:06,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 12:54:06,545 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:54:06,546 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:54:06,546 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:54:06,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:54:06,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:54:06,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:54:06,547 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 12:54:06,547 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:54:06,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:54:06,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 12:54:06,548 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:54:06,548 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:54:06,549 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_974e8fe7-4877-42f8-9720-d81be163b3dc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_974e8fe7-4877-42f8-9720-d81be163b3dc/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a342581b7572d5ebcb4a58d0a914c795d7fcf5cd [2020-11-22 12:54:06,804 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:54:06,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:54:06,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:54:06,831 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:54:06,831 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:54:06,832 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_974e8fe7-4877-42f8-9720-d81be163b3dc/bin/utaipan/../../sv-benchmarks/c/ldv-regression/stateful_check.c [2020-11-22 12:54:06,932 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_974e8fe7-4877-42f8-9720-d81be163b3dc/bin/utaipan/data/071c5dffb/91c8b37f7ad644d0aebc12a952f72386/FLAG95e87c18a [2020-11-22 12:54:07,590 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:54:07,591 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_974e8fe7-4877-42f8-9720-d81be163b3dc/sv-benchmarks/c/ldv-regression/stateful_check.c [2020-11-22 12:54:07,599 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_974e8fe7-4877-42f8-9720-d81be163b3dc/bin/utaipan/data/071c5dffb/91c8b37f7ad644d0aebc12a952f72386/FLAG95e87c18a [2020-11-22 12:54:07,980 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_974e8fe7-4877-42f8-9720-d81be163b3dc/bin/utaipan/data/071c5dffb/91c8b37f7ad644d0aebc12a952f72386 [2020-11-22 12:54:07,986 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:54:07,988 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:54:07,998 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:54:07,998 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:54:08,008 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:54:08,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:54:07" (1/1) ... [2020-11-22 12:54:08,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4667b936 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:54:08, skipping insertion in model container [2020-11-22 12:54:08,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:54:07" (1/1) ... [2020-11-22 12:54:08,020 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:54:08,049 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:54:08,315 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:54:08,325 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:54:08,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:54:08,401 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:54:08,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:54:08 WrapperNode [2020-11-22 12:54:08,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:54:08,403 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:54:08,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:54:08,404 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:54:08,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:54:08" (1/1) ... [2020-11-22 12:54:08,424 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:54:08" (1/1) ... [2020-11-22 12:54:08,450 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:54:08,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:54:08,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:54:08,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:54:08,462 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:54:08" (1/1) ... [2020-11-22 12:54:08,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:54:08" (1/1) ... [2020-11-22 12:54:08,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:54:08" (1/1) ... [2020-11-22 12:54:08,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:54:08" (1/1) ... [2020-11-22 12:54:08,472 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:54:08" (1/1) ... [2020-11-22 12:54:08,477 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:54:08" (1/1) ... [2020-11-22 12:54:08,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:54:08" (1/1) ... [2020-11-22 12:54:08,483 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:54:08,484 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:54:08,484 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:54:08,485 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:54:08,486 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:54:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_974e8fe7-4877-42f8-9720-d81be163b3dc/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 [2020-11-22 12:54:08,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 12:54:08,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:54:08,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:54:08,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:54:09,315 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:54:09,316 INFO L298 CfgBuilder]: Removed 45 assume(true) statements. [2020-11-22 12:54:09,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:54:09 BoogieIcfgContainer [2020-11-22 12:54:09,318 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:54:09,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:54:09,321 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:54:09,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:54:09,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:54:07" (1/3) ... [2020-11-22 12:54:09,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74b48a89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:54:09, skipping insertion in model container [2020-11-22 12:54:09,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:54:08" (2/3) ... [2020-11-22 12:54:09,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74b48a89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:54:09, skipping insertion in model container [2020-11-22 12:54:09,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:54:09" (3/3) ... [2020-11-22 12:54:09,329 INFO L111 eAbstractionObserver]: Analyzing ICFG stateful_check.c [2020-11-22 12:54:09,342 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:54:09,347 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-11-22 12:54:09,359 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-11-22 12:54:09,385 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:54:09,386 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 12:54:09,386 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:54:09,386 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:54:09,386 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:54:09,386 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:54:09,386 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:54:09,387 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:54:09,427 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-11-22 12:54:09,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-22 12:54:09,433 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:54:09,434 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-22 12:54:09,435 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:54:09,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:54:09,442 INFO L82 PathProgramCache]: Analyzing trace with hash 5982222, now seen corresponding path program 1 times [2020-11-22 12:54:09,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:54:09,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535175419] [2020-11-22 12:54:09,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:54:09,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:54:09,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:54:09,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535175419] [2020-11-22 12:54:09,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:54:09,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:54:09,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977019219] [2020-11-22 12:54:09,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-22 12:54:09,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:54:09,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-22 12:54:09,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 12:54:09,638 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-11-22 12:54:09,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:54:09,665 INFO L93 Difference]: Finished difference Result 63 states and 87 transitions. [2020-11-22 12:54:09,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 12:54:09,667 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-11-22 12:54:09,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:54:09,698 INFO L225 Difference]: With dead ends: 63 [2020-11-22 12:54:09,698 INFO L226 Difference]: Without dead ends: 30 [2020-11-22 12:54:09,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 12:54:09,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-22 12:54:09,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-11-22 12:54:09,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-22 12:54:09,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-11-22 12:54:09,759 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 4 [2020-11-22 12:54:09,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:54:09,761 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-11-22 12:54:09,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-22 12:54:09,762 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-11-22 12:54:09,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 12:54:09,762 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:54:09,763 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 12:54:09,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 12:54:09,763 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:54:09,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:54:09,768 INFO L82 PathProgramCache]: Analyzing trace with hash 181294569, now seen corresponding path program 1 times [2020-11-22 12:54:09,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:54:09,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083208229] [2020-11-22 12:54:09,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:54:09,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:54:09,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:54:09,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083208229] [2020-11-22 12:54:09,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:54:09,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:54:09,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649460270] [2020-11-22 12:54:09,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:54:09,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:54:09,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:54:09,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:54:09,874 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 3 states. [2020-11-22 12:54:09,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:54:09,937 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2020-11-22 12:54:09,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:54:09,938 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-22 12:54:09,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:54:09,939 INFO L225 Difference]: With dead ends: 49 [2020-11-22 12:54:09,939 INFO L226 Difference]: Without dead ends: 42 [2020-11-22 12:54:09,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:54:09,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-22 12:54:09,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-22 12:54:09,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-22 12:54:09,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2020-11-22 12:54:09,950 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 5 [2020-11-22 12:54:09,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:54:09,950 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2020-11-22 12:54:09,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:54:09,951 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2020-11-22 12:54:09,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-22 12:54:09,952 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:54:09,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:54:09,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 12:54:09,952 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:54:09,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:54:09,953 INFO L82 PathProgramCache]: Analyzing trace with hash 905068967, now seen corresponding path program 1 times [2020-11-22 12:54:09,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:54:09,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692355455] [2020-11-22 12:54:09,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:54:09,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:54:10,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:54:10,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692355455] [2020-11-22 12:54:10,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:54:10,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:54:10,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977800229] [2020-11-22 12:54:10,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:54:10,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:54:10,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:54:10,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:54:10,052 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand 3 states. [2020-11-22 12:54:10,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:54:10,103 INFO L93 Difference]: Finished difference Result 102 states and 136 transitions. [2020-11-22 12:54:10,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:54:10,106 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-11-22 12:54:10,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:54:10,108 INFO L225 Difference]: With dead ends: 102 [2020-11-22 12:54:10,108 INFO L226 Difference]: Without dead ends: 61 [2020-11-22 12:54:10,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:54:10,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-22 12:54:10,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-11-22 12:54:10,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-22 12:54:10,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 79 transitions. [2020-11-22 12:54:10,128 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 79 transitions. Word has length 13 [2020-11-22 12:54:10,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:54:10,129 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 79 transitions. [2020-11-22 12:54:10,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:54:10,129 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 79 transitions. [2020-11-22 12:54:10,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-22 12:54:10,130 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:54:10,130 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:54:10,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 12:54:10,130 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:54:10,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:54:10,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1178326143, now seen corresponding path program 1 times [2020-11-22 12:54:10,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:54:10,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766612405] [2020-11-22 12:54:10,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:54:10,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:54:10,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:54:10,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766612405] [2020-11-22 12:54:10,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657997271] [2020-11-22 12:54:10,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_974e8fe7-4877-42f8-9720-d81be163b3dc/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:54:10,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:54:10,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-22 12:54:10,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:54:10,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:54:10,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:54:10,440 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 7, 2, 3, 1] term [2020-11-22 12:54:10,440 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:54:10,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-22 12:54:10,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-11-22 12:54:10,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 3] total 5 [2020-11-22 12:54:10,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320117207] [2020-11-22 12:54:10,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:54:10,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:54:10,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:54:10,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-11-22 12:54:10,468 INFO L87 Difference]: Start difference. First operand 58 states and 79 transitions. Second operand 3 states. [2020-11-22 12:54:10,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:54:10,545 INFO L93 Difference]: Finished difference Result 150 states and 211 transitions. [2020-11-22 12:54:10,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:54:10,549 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-11-22 12:54:10,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:54:10,550 INFO L225 Difference]: With dead ends: 150 [2020-11-22 12:54:10,550 INFO L226 Difference]: Without dead ends: 93 [2020-11-22 12:54:10,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-11-22 12:54:10,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-22 12:54:10,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2020-11-22 12:54:10,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-11-22 12:54:10,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 129 transitions. [2020-11-22 12:54:10,565 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 129 transitions. Word has length 17 [2020-11-22 12:54:10,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:54:10,565 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 129 transitions. [2020-11-22 12:54:10,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:54:10,566 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 129 transitions. [2020-11-22 12:54:10,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-22 12:54:10,567 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:54:10,567 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:54:10,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:54:10,793 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:54:10,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:54:10,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1905243990, now seen corresponding path program 1 times [2020-11-22 12:54:10,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:54:10,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24092574] [2020-11-22 12:54:10,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:54:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:54:10,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-22 12:54:10,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24092574] [2020-11-22 12:54:10,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597165747] [2020-11-22 12:54:10,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_974e8fe7-4877-42f8-9720-d81be163b3dc/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:54:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:54:10,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-22 12:54:10,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:54:10,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-22 12:54:10,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:54:11,023 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 7, 2, 3, 1] term [2020-11-22 12:54:11,023 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:54:11,079 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 5, 1] term [2020-11-22 12:54:11,080 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:54:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-22 12:54:11,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [262130581] [2020-11-22 12:54:11,114 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-11-22 12:54:11,115 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:54:11,121 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:54:11,128 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:54:11,130 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:54:11,964 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 12:54:12,167 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 33 [2020-11-22 12:54:12,314 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 30 [2020-11-22 12:54:12,449 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2020-11-22 12:54:12,629 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-11-22 12:54:12,803 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2020-11-22 12:54:13,077 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-11-22 12:54:13,233 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2020-11-22 12:54:13,481 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-11-22 12:54:13,677 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 33 [2020-11-22 12:54:13,860 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 33 [2020-11-22 12:54:14,031 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 33 [2020-11-22 12:54:14,048 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:54:14,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 12:54:14,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 6 [2020-11-22 12:54:14,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457402547] [2020-11-22 12:54:14,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-22 12:54:14,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:54:14,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-22 12:54:14,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-11-22 12:54:14,052 INFO L87 Difference]: Start difference. First operand 90 states and 129 transitions. Second operand 7 states. [2020-11-22 12:54:14,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:54:14,173 INFO L93 Difference]: Finished difference Result 236 states and 342 transitions. [2020-11-22 12:54:14,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 12:54:14,174 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-11-22 12:54:14,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:54:14,176 INFO L225 Difference]: With dead ends: 236 [2020-11-22 12:54:14,179 INFO L226 Difference]: Without dead ends: 147 [2020-11-22 12:54:14,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-11-22 12:54:14,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-11-22 12:54:14,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 90. [2020-11-22 12:54:14,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-11-22 12:54:14,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 129 transitions. [2020-11-22 12:54:14,195 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 129 transitions. Word has length 23 [2020-11-22 12:54:14,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:54:14,195 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 129 transitions. [2020-11-22 12:54:14,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-22 12:54:14,196 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 129 transitions. [2020-11-22 12:54:14,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-22 12:54:14,197 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:54:14,197 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:54:14,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:54:14,421 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:54:14,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:54:14,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1469059751, now seen corresponding path program 1 times [2020-11-22 12:54:14,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:54:14,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408766222] [2020-11-22 12:54:14,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:54:14,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 12:54:14,471 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 12:54:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 12:54:14,517 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 12:54:14,542 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-22 12:54:14,542 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-22 12:54:14,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-11-22 12:54:14,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:54:14 BoogieIcfgContainer [2020-11-22 12:54:14,609 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:54:14,610 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:54:14,610 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:54:14,610 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:54:14,611 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:54:09" (3/4) ... [2020-11-22 12:54:14,613 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-22 12:54:14,698 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_974e8fe7-4877-42f8-9720-d81be163b3dc/bin/utaipan/witness.graphml [2020-11-22 12:54:14,698 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:54:14,700 INFO L168 Benchmark]: Toolchain (without parser) took 6711.42 ms. Allocated memory was 132.1 MB in the beginning and 178.3 MB in the end (delta: 46.1 MB). Free memory was 104.9 MB in the beginning and 61.1 MB in the end (delta: 43.8 MB). Peak memory consumption was 88.7 MB. Max. memory is 16.1 GB. [2020-11-22 12:54:14,700 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 88.1 MB. Free memory is still 48.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:54:14,700 INFO L168 Benchmark]: CACSL2BoogieTranslator took 404.35 ms. Allocated memory is still 132.1 MB. Free memory was 104.5 MB in the beginning and 109.5 MB in the end (delta: -4.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 12:54:14,701 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.53 ms. Allocated memory is still 132.1 MB. Free memory was 109.5 MB in the beginning and 107.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:54:14,701 INFO L168 Benchmark]: Boogie Preprocessor took 31.73 ms. Allocated memory is still 132.1 MB. Free memory was 107.8 MB in the beginning and 106.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:54:14,702 INFO L168 Benchmark]: RCFGBuilder took 834.31 ms. Allocated memory is still 132.1 MB. Free memory was 106.5 MB in the beginning and 77.7 MB in the end (delta: 28.8 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2020-11-22 12:54:14,702 INFO L168 Benchmark]: TraceAbstraction took 5288.92 ms. Allocated memory was 132.1 MB in the beginning and 178.3 MB in the end (delta: 46.1 MB). Free memory was 77.2 MB in the beginning and 64.3 MB in the end (delta: 12.9 MB). Peak memory consumption was 60.5 MB. Max. memory is 16.1 GB. [2020-11-22 12:54:14,704 INFO L168 Benchmark]: Witness Printer took 88.69 ms. Allocated memory is still 178.3 MB. Free memory was 64.3 MB in the beginning and 61.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:54:14,706 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 88.1 MB. Free memory is still 48.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 404.35 ms. Allocated memory is still 132.1 MB. Free memory was 104.5 MB in the beginning and 109.5 MB in the end (delta: -4.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.53 ms. Allocated memory is still 132.1 MB. Free memory was 109.5 MB in the beginning and 107.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.73 ms. Allocated memory is still 132.1 MB. Free memory was 107.8 MB in the beginning and 106.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 834.31 ms. Allocated memory is still 132.1 MB. Free memory was 106.5 MB in the beginning and 77.7 MB in the end (delta: 28.8 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5288.92 ms. Allocated memory was 132.1 MB in the beginning and 178.3 MB in the end (delta: 46.1 MB). Free memory was 77.2 MB in the beginning and 64.3 MB in the end (delta: 12.9 MB). Peak memory consumption was 60.5 MB. Max. memory is 16.1 GB. * Witness Printer took 88.69 ms. Allocated memory is still 178.3 MB. Free memory was 64.3 MB in the beginning and 61.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L11] int ldv_mutex = 1; [L13] int open_called = 0; [L76] int ldv_s_misc_fops_file_operations = 0; [L71] open_called = 0 [L72] return 0; [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: [L83] COND TRUE ldv_s_misc_fops_file_operations==0 [L59] COND TRUE __VERIFIER_nondet_int() [L61] return 1; [L85] ldv_s_misc_fops_file_operations++ VAL [ldv_mutex=1, open_called=0] [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: [L90] case 1: [L91] COND TRUE ldv_s_misc_fops_file_operations==1 [L54] return 0; [L93] ldv_s_misc_fops_file_operations++ VAL [ldv_mutex=1, open_called=0] [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: [L90] case 1: [L98] case 2: [L99] COND TRUE ldv_s_misc_fops_file_operations==2 [L50] return 0; [L101] ldv_s_misc_fops_file_operations++ VAL [ldv_mutex=1, open_called=0] [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: [L90] case 1: [L98] case 2: [L106] case 3: VAL [ldv_mutex=1, open_called=0] [L107] COND TRUE ldv_s_misc_fops_file_operations==3 [L36] COND FALSE !(\read(open_called)) VAL [ldv_mutex=1, open_called=0] [L18] (ldv_mutex == 1) ? 0 : __blast_assert() VAL [ldv_mutex=1, open_called=0] [L19] ldv_mutex = 2 VAL [ldv_mutex=2, open_called=0] [L18] (ldv_mutex == 1) ? 0 : __blast_assert() VAL [ldv_mutex=2, open_called=0] [L3] __assert_fail("0", "stateful_check.c", 3, "reach_error") VAL [ldv_mutex=2, open_called=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.1s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 181 SDtfs, 66 SDslu, 171 SDs, 0 SdLazy, 66 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 112 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=4, 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, 5 MinimizatonAttempts, 63 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 130 NumberOfCodeBlocks, 130 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 133 ConstructedInterpolants, 0 QuantifiedInterpolants, 5947 SizeOfPredicates, 23 NumberOfNonLiveVariables, 159 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 9 InterpolantComputations, 4 PerfectInterpolantSequences, 14/45 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...