./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_c082e876-bf81-4786-9b37-5b29fde26d7a/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c082e876-bf81-4786-9b37-5b29fde26d7a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c082e876-bf81-4786-9b37-5b29fde26d7a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c082e876-bf81-4786-9b37-5b29fde26d7a/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/stateful_check.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c082e876-bf81-4786-9b37-5b29fde26d7a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c082e876-bf81-4786-9b37-5b29fde26d7a/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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 [2020-11-28 02:56:20,606 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 02:56:20,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 02:56:20,682 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 02:56:20,682 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 02:56:20,683 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 02:56:20,685 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 02:56:20,688 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 02:56:20,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 02:56:20,692 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 02:56:20,693 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 02:56:20,694 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 02:56:20,695 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 02:56:20,696 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 02:56:20,698 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 02:56:20,699 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 02:56:20,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 02:56:20,702 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 02:56:20,704 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 02:56:20,706 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 02:56:20,708 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 02:56:20,710 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 02:56:20,712 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 02:56:20,713 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 02:56:20,717 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 02:56:20,717 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 02:56:20,718 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 02:56:20,719 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 02:56:20,720 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 02:56:20,721 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 02:56:20,721 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 02:56:20,722 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 02:56:20,723 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 02:56:20,724 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 02:56:20,729 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 02:56:20,729 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 02:56:20,731 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 02:56:20,731 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 02:56:20,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 02:56:20,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 02:56:20,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 02:56:20,736 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c082e876-bf81-4786-9b37-5b29fde26d7a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 02:56:20,782 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 02:56:20,782 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 02:56:20,784 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 02:56:20,785 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 02:56:20,785 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 02:56:20,785 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 02:56:20,785 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 02:56:20,786 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 02:56:20,786 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 02:56:20,786 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 02:56:20,787 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 02:56:20,787 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 02:56:20,788 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 02:56:20,788 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 02:56:20,788 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 02:56:20,788 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 02:56:20,788 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 02:56:20,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 02:56:20,789 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 02:56:20,789 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 02:56:20,789 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 02:56:20,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 02:56:20,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 02:56:20,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 02:56:20,790 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 02:56:20,791 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 02:56:20,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 02:56:20,791 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 02:56:20,791 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 02:56:20,791 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_c082e876-bf81-4786-9b37-5b29fde26d7a/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c082e876-bf81-4786-9b37-5b29fde26d7a/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a342581b7572d5ebcb4a58d0a914c795d7fcf5cd [2020-11-28 02:56:21,049 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 02:56:21,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 02:56:21,085 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 02:56:21,092 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 02:56:21,094 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 02:56:21,095 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c082e876-bf81-4786-9b37-5b29fde26d7a/bin/uautomizer/../../sv-benchmarks/c/ldv-regression/stateful_check.c [2020-11-28 02:56:21,181 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c082e876-bf81-4786-9b37-5b29fde26d7a/bin/uautomizer/data/0aa65f02c/51a8b13c2f964f0b9ff72fac15d28587/FLAGf86295344 [2020-11-28 02:56:21,633 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 02:56:21,634 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c082e876-bf81-4786-9b37-5b29fde26d7a/sv-benchmarks/c/ldv-regression/stateful_check.c [2020-11-28 02:56:21,641 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c082e876-bf81-4786-9b37-5b29fde26d7a/bin/uautomizer/data/0aa65f02c/51a8b13c2f964f0b9ff72fac15d28587/FLAGf86295344 [2020-11-28 02:56:22,013 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c082e876-bf81-4786-9b37-5b29fde26d7a/bin/uautomizer/data/0aa65f02c/51a8b13c2f964f0b9ff72fac15d28587 [2020-11-28 02:56:22,015 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 02:56:22,017 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 02:56:22,027 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 02:56:22,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 02:56:22,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 02:56:22,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:56:22" (1/1) ... [2020-11-28 02:56:22,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@131e84f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:22, skipping insertion in model container [2020-11-28 02:56:22,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:56:22" (1/1) ... [2020-11-28 02:56:22,040 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 02:56:22,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 02:56:22,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:56:22,280 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 02:56:22,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:56:22,320 INFO L208 MainTranslator]: Completed translation [2020-11-28 02:56:22,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:22 WrapperNode [2020-11-28 02:56:22,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 02:56:22,322 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 02:56:22,323 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 02:56:22,323 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 02:56:22,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:22" (1/1) ... [2020-11-28 02:56:22,338 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:22" (1/1) ... [2020-11-28 02:56:22,360 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 02:56:22,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 02:56:22,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 02:56:22,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 02:56:22,370 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:22" (1/1) ... [2020-11-28 02:56:22,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:22" (1/1) ... [2020-11-28 02:56:22,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:22" (1/1) ... [2020-11-28 02:56:22,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:22" (1/1) ... [2020-11-28 02:56:22,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:22" (1/1) ... [2020-11-28 02:56:22,392 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:22" (1/1) ... [2020-11-28 02:56:22,394 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:22" (1/1) ... [2020-11-28 02:56:22,397 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 02:56:22,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 02:56:22,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 02:56:22,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 02:56:22,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c082e876-bf81-4786-9b37-5b29fde26d7a/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 [2020-11-28 02:56:22,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 02:56:22,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 02:56:22,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 02:56:22,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 02:56:22,959 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 02:56:22,959 INFO L298 CfgBuilder]: Removed 45 assume(true) statements. [2020-11-28 02:56:22,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:56:22 BoogieIcfgContainer [2020-11-28 02:56:22,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 02:56:22,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 02:56:22,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 02:56:22,968 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 02:56:22,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:56:22" (1/3) ... [2020-11-28 02:56:22,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ae5ceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:56:22, skipping insertion in model container [2020-11-28 02:56:22,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:22" (2/3) ... [2020-11-28 02:56:22,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ae5ceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:56:22, skipping insertion in model container [2020-11-28 02:56:22,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:56:22" (3/3) ... [2020-11-28 02:56:22,972 INFO L111 eAbstractionObserver]: Analyzing ICFG stateful_check.c [2020-11-28 02:56:22,984 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 02:56:22,989 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-11-28 02:56:23,002 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-11-28 02:56:23,047 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 02:56:23,048 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 02:56:23,048 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 02:56:23,048 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 02:56:23,048 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 02:56:23,048 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 02:56:23,048 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 02:56:23,048 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 02:56:23,065 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-11-28 02:56:23,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 02:56:23,071 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:23,071 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 02:56:23,072 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]=== [2020-11-28 02:56:23,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:23,079 INFO L82 PathProgramCache]: Analyzing trace with hash 889613073, now seen corresponding path program 1 times [2020-11-28 02:56:23,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:23,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956639453] [2020-11-28 02:56:23,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:23,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:23,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:56:23,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956639453] [2020-11-28 02:56:23,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:56:23,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 02:56:23,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642756197] [2020-11-28 02:56:23,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 02:56:23,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:56:23,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 02:56:23,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 02:56:23,321 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 2 states. [2020-11-28 02:56:23,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:56:23,351 INFO L93 Difference]: Finished difference Result 94 states and 128 transitions. [2020-11-28 02:56:23,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 02:56:23,352 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-11-28 02:56:23,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:56:23,370 INFO L225 Difference]: With dead ends: 94 [2020-11-28 02:56:23,370 INFO L226 Difference]: Without dead ends: 42 [2020-11-28 02:56:23,379 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 [2020-11-28 02:56:23,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-28 02:56:23,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-28 02:56:23,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-28 02:56:23,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2020-11-28 02:56:23,430 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 6 [2020-11-28 02:56:23,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:56:23,431 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2020-11-28 02:56:23,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 02:56:23,431 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2020-11-28 02:56:23,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 02:56:23,431 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:23,432 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:56:23,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 02:56:23,432 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]=== [2020-11-28 02:56:23,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:23,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1804047174, now seen corresponding path program 1 times [2020-11-28 02:56:23,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:23,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780109667] [2020-11-28 02:56:23,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:56:23,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780109667] [2020-11-28 02:56:23,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:56:23,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 02:56:23,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123658040] [2020-11-28 02:56:23,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:56:23,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:56:23,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:56:23,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:56:23,516 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 3 states. [2020-11-28 02:56:23,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:56:23,585 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2020-11-28 02:56:23,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:56:23,585 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-11-28 02:56:23,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:56:23,587 INFO L225 Difference]: With dead ends: 70 [2020-11-28 02:56:23,587 INFO L226 Difference]: Without dead ends: 63 [2020-11-28 02:56:23,588 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 [2020-11-28 02:56:23,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-28 02:56:23,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-11-28 02:56:23,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-28 02:56:23,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2020-11-28 02:56:23,599 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 7 [2020-11-28 02:56:23,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:56:23,600 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2020-11-28 02:56:23,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:56:23,600 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2020-11-28 02:56:23,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 02:56:23,601 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:23,601 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:56:23,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 02:56:23,602 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]=== [2020-11-28 02:56:23,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:23,603 INFO L82 PathProgramCache]: Analyzing trace with hash -117779964, now seen corresponding path program 1 times [2020-11-28 02:56:23,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:23,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121669850] [2020-11-28 02:56:23,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:23,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:23,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:56:23,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121669850] [2020-11-28 02:56:23,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:56:23,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:56:23,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467881726] [2020-11-28 02:56:23,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:56:23,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:56:23,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:56:23,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:56:23,669 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand 3 states. [2020-11-28 02:56:23,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:56:23,754 INFO L93 Difference]: Finished difference Result 150 states and 212 transitions. [2020-11-28 02:56:23,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:56:23,756 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-11-28 02:56:23,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:56:23,758 INFO L225 Difference]: With dead ends: 150 [2020-11-28 02:56:23,758 INFO L226 Difference]: Without dead ends: 90 [2020-11-28 02:56:23,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:56:23,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-28 02:56:23,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-11-28 02:56:23,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-11-28 02:56:23,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 120 transitions. [2020-11-28 02:56:23,779 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 120 transitions. Word has length 15 [2020-11-28 02:56:23,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:56:23,780 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 120 transitions. [2020-11-28 02:56:23,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:56:23,781 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 120 transitions. [2020-11-28 02:56:23,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-28 02:56:23,783 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:23,783 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:56:23,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 02:56:23,784 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]=== [2020-11-28 02:56:23,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:23,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1023840060, now seen corresponding path program 1 times [2020-11-28 02:56:23,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:23,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874474531] [2020-11-28 02:56:23,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:23,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:56:23,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874474531] [2020-11-28 02:56:23,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792423308] [2020-11-28 02:56:23,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c082e876-bf81-4786-9b37-5b29fde26d7a/bin/uautomizer/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 [2020-11-28 02:56:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:23,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 02:56:23,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:56:24,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:56:24,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:56:24,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-11-28 02:56:24,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514600023] [2020-11-28 02:56:24,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:56:24,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:56:24,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:56:24,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:56:24,022 INFO L87 Difference]: Start difference. First operand 87 states and 120 transitions. Second operand 5 states. [2020-11-28 02:56:24,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:56:24,141 INFO L93 Difference]: Finished difference Result 228 states and 329 transitions. [2020-11-28 02:56:24,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 02:56:24,142 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-11-28 02:56:24,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:56:24,144 INFO L225 Difference]: With dead ends: 228 [2020-11-28 02:56:24,145 INFO L226 Difference]: Without dead ends: 144 [2020-11-28 02:56:24,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:56:24,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-11-28 02:56:24,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 135. [2020-11-28 02:56:24,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-11-28 02:56:24,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 196 transitions. [2020-11-28 02:56:24,163 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 196 transitions. Word has length 22 [2020-11-28 02:56:24,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:56:24,163 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 196 transitions. [2020-11-28 02:56:24,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:56:24,164 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 196 transitions. [2020-11-28 02:56:24,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-28 02:56:24,165 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:24,165 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:56:24,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:56:24,389 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]=== [2020-11-28 02:56:24,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:24,390 INFO L82 PathProgramCache]: Analyzing trace with hash -278056186, now seen corresponding path program 1 times [2020-11-28 02:56:24,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:24,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188038014] [2020-11-28 02:56:24,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:24,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-28 02:56:24,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188038014] [2020-11-28 02:56:24,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:56:24,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 02:56:24,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933636643] [2020-11-28 02:56:24,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 02:56:24,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:56:24,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 02:56:24,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 02:56:24,494 INFO L87 Difference]: Start difference. First operand 135 states and 196 transitions. Second operand 4 states. [2020-11-28 02:56:24,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:56:24,586 INFO L93 Difference]: Finished difference Result 369 states and 555 transitions. [2020-11-28 02:56:24,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 02:56:24,587 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-11-28 02:56:24,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:56:24,590 INFO L225 Difference]: With dead ends: 369 [2020-11-28 02:56:24,591 INFO L226 Difference]: Without dead ends: 237 [2020-11-28 02:56:24,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 02:56:24,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-11-28 02:56:24,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 183. [2020-11-28 02:56:24,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-11-28 02:56:24,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 276 transitions. [2020-11-28 02:56:24,616 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 276 transitions. Word has length 29 [2020-11-28 02:56:24,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:56:24,616 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 276 transitions. [2020-11-28 02:56:24,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 02:56:24,617 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 276 transitions. [2020-11-28 02:56:24,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-28 02:56:24,619 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:24,619 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:56:24,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 02:56:24,620 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]=== [2020-11-28 02:56:24,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:24,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1243698636, now seen corresponding path program 1 times [2020-11-28 02:56:24,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:24,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835878415] [2020-11-28 02:56:24,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:56:24,672 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:56:24,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:56:24,716 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:56:24,748 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:56:24,750 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 02:56:24,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 02:56:24,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 02:56:24 BoogieIcfgContainer [2020-11-28 02:56:24,820 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 02:56:24,821 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 02:56:24,821 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 02:56:24,821 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 02:56:24,822 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:56:22" (3/4) ... [2020-11-28 02:56:24,824 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 02:56:24,898 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c082e876-bf81-4786-9b37-5b29fde26d7a/bin/uautomizer/witness.graphml [2020-11-28 02:56:24,898 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 02:56:24,900 INFO L168 Benchmark]: Toolchain (without parser) took 2882.39 ms. Allocated memory is still 113.2 MB. Free memory was 81.3 MB in the beginning and 39.2 MB in the end (delta: 42.1 MB). Peak memory consumption was 41.6 MB. Max. memory is 16.1 GB. [2020-11-28 02:56:24,901 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 77.6 MB. Free memory was 37.2 MB in the beginning and 37.2 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:56:24,902 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.94 ms. Allocated memory is still 113.2 MB. Free memory was 81.1 MB in the beginning and 89.5 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 02:56:24,902 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.97 ms. Allocated memory is still 113.2 MB. Free memory was 89.5 MB in the beginning and 88.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:56:24,903 INFO L168 Benchmark]: Boogie Preprocessor took 35.86 ms. Allocated memory is still 113.2 MB. Free memory was 88.0 MB in the beginning and 86.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:56:24,904 INFO L168 Benchmark]: RCFGBuilder took 560.13 ms. Allocated memory is still 113.2 MB. Free memory was 86.6 MB in the beginning and 68.5 MB in the end (delta: 18.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-28 02:56:24,905 INFO L168 Benchmark]: TraceAbstraction took 1856.94 ms. Allocated memory is still 113.2 MB. Free memory was 68.5 MB in the beginning and 42.9 MB in the end (delta: 25.6 MB). Peak memory consumption was 27.6 MB. Max. memory is 16.1 GB. [2020-11-28 02:56:24,905 INFO L168 Benchmark]: Witness Printer took 77.54 ms. Allocated memory is still 113.2 MB. Free memory was 42.9 MB in the beginning and 39.2 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 02:56:24,915 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 77.6 MB. Free memory was 37.2 MB in the beginning and 37.2 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 294.94 ms. Allocated memory is still 113.2 MB. Free memory was 81.1 MB in the beginning and 89.5 MB in the end (delta: -8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.97 ms. Allocated memory is still 113.2 MB. Free memory was 89.5 MB in the beginning and 88.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.86 ms. Allocated memory is still 113.2 MB. Free memory was 88.0 MB in the beginning and 86.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 560.13 ms. Allocated memory is still 113.2 MB. Free memory was 86.6 MB in the beginning and 68.5 MB in the end (delta: 18.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1856.94 ms. Allocated memory is still 113.2 MB. Free memory was 68.5 MB in the beginning and 42.9 MB in the end (delta: 25.6 MB). Peak memory consumption was 27.6 MB. Max. memory is 16.1 GB. * Witness Printer took 77.54 ms. Allocated memory is still 113.2 MB. Free memory was 42.9 MB in the beginning and 39.2 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 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; VAL [ldv_mutex=1, open_called=0] [L76] int ldv_s_misc_fops_file_operations = 0; [L71] open_called = 0 [L72] return 0; VAL [ldv_mutex=1, open_called=0] [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: VAL [ldv_mutex=1, open_called=0] [L83] COND TRUE ldv_s_misc_fops_file_operations==0 [L59] COND TRUE __VERIFIER_nondet_int() [L61] return 1; VAL [ldv_mutex=1, open_called=0] [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: VAL [ldv_mutex=1, open_called=0] [L91] COND TRUE ldv_s_misc_fops_file_operations==1 [L54] return 0; VAL [ldv_mutex=1, open_called=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: VAL [ldv_mutex=1, open_called=0] [L99] COND TRUE ldv_s_misc_fops_file_operations==2 [L50] return 0; VAL [ldv_mutex=1, open_called=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, 51 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.7s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 246 SDtfs, 153 SDslu, 237 SDs, 0 SdLazy, 85 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=183occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 66 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 138 NumberOfCodeBlocks, 138 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 95 ConstructedInterpolants, 0 QuantifiedInterpolants, 3971 SizeOfPredicates, 1 NumberOfNonLiveVariables, 85 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 11/17 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...