./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/nsqmf.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_02bcc14b-a98c-42cd-927d-94e1f0cdf02c/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_02bcc14b-a98c-42cd-927d-94e1f0cdf02c/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_02bcc14b-a98c-42cd-927d-94e1f0cdf02c/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_02bcc14b-a98c-42cd-927d-94e1f0cdf02c/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/nsqmf.c -s /tmp/vcloud-vcloud-master/worker/run_dir_02bcc14b-a98c-42cd-927d-94e1f0cdf02c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_02bcc14b-a98c-42cd-927d-94e1f0cdf02c/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 84af1a44340d97934a061498051a9028cf73e371 ........................................................................................................................................................................................................................................................................................................ 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 0.2.0-69874e2 [2020-12-01 15:22:10,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 15:22:10,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 15:22:11,012 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 15:22:11,013 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 15:22:11,018 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 15:22:11,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 15:22:11,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 15:22:11,028 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 15:22:11,037 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 15:22:11,038 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 15:22:11,040 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 15:22:11,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 15:22:11,045 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 15:22:11,046 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 15:22:11,049 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 15:22:11,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 15:22:11,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 15:22:11,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 15:22:11,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 15:22:11,071 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 15:22:11,072 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 15:22:11,074 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 15:22:11,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 15:22:11,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 15:22:11,079 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 15:22:11,079 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 15:22:11,080 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 15:22:11,081 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 15:22:11,082 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 15:22:11,082 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 15:22:11,083 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 15:22:11,084 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 15:22:11,085 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 15:22:11,086 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 15:22:11,087 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 15:22:11,088 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 15:22:11,088 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 15:22:11,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 15:22:11,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 15:22:11,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 15:22:11,092 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_02bcc14b-a98c-42cd-927d-94e1f0cdf02c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-01 15:22:11,117 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 15:22:11,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 15:22:11,119 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 15:22:11,119 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 15:22:11,119 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 15:22:11,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 15:22:11,120 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 15:22:11,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 15:22:11,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 15:22:11,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 15:22:11,121 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 15:22:11,121 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 15:22:11,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 15:22:11,121 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 15:22:11,122 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 15:22:11,122 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 15:22:11,122 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 15:22:11,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 15:22:11,123 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 15:22:11,123 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 15:22:11,123 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-01 15:22:11,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 15:22:11,124 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 15:22:11,124 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 15:22:11,124 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 15:22:11,124 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-01 15:22:11,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 15:22:11,125 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 15:22:11,125 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 15:22:11,125 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_02bcc14b-a98c-42cd-927d-94e1f0cdf02c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_02bcc14b-a98c-42cd-927d-94e1f0cdf02c/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 84af1a44340d97934a061498051a9028cf73e371 [2020-12-01 15:22:11,390 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 15:22:11,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 15:22:11,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 15:22:11,422 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 15:22:11,424 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 15:22:11,425 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_02bcc14b-a98c-42cd-927d-94e1f0cdf02c/bin/uautomizer/../../sv-benchmarks/c/array-fpi/nsqmf.c [2020-12-01 15:22:11,506 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_02bcc14b-a98c-42cd-927d-94e1f0cdf02c/bin/uautomizer/data/9c3b0dd18/7733237641664eb29418012ec0338fc0/FLAG47486d80a [2020-12-01 15:22:11,991 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 15:22:11,991 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_02bcc14b-a98c-42cd-927d-94e1f0cdf02c/sv-benchmarks/c/array-fpi/nsqmf.c [2020-12-01 15:22:12,002 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_02bcc14b-a98c-42cd-927d-94e1f0cdf02c/bin/uautomizer/data/9c3b0dd18/7733237641664eb29418012ec0338fc0/FLAG47486d80a [2020-12-01 15:22:12,351 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_02bcc14b-a98c-42cd-927d-94e1f0cdf02c/bin/uautomizer/data/9c3b0dd18/7733237641664eb29418012ec0338fc0 [2020-12-01 15:22:12,353 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 15:22:12,356 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 15:22:12,364 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 15:22:12,364 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 15:22:12,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 15:22:12,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:22:12" (1/1) ... [2020-12-01 15:22:12,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3df40db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:22:12, skipping insertion in model container [2020-12-01 15:22:12,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:22:12" (1/1) ... [2020-12-01 15:22:12,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 15:22:12,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 15:22:12,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:22:12,628 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 15:22:12,675 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:22:12,691 INFO L208 MainTranslator]: Completed translation [2020-12-01 15:22:12,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:22:12 WrapperNode [2020-12-01 15:22:12,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 15:22:12,694 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 15:22:12,695 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 15:22:12,696 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 15:22:12,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:22:12" (1/1) ... [2020-12-01 15:22:12,714 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:22:12" (1/1) ... [2020-12-01 15:22:12,734 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 15:22:12,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 15:22:12,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 15:22:12,736 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 15:22:12,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:22:12" (1/1) ... [2020-12-01 15:22:12,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:22:12" (1/1) ... [2020-12-01 15:22:12,747 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:22:12" (1/1) ... [2020-12-01 15:22:12,747 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:22:12" (1/1) ... [2020-12-01 15:22:12,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:22:12" (1/1) ... [2020-12-01 15:22:12,758 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:22:12" (1/1) ... [2020-12-01 15:22:12,760 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:22:12" (1/1) ... [2020-12-01 15:22:12,762 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 15:22:12,763 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 15:22:12,763 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 15:22:12,763 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 15:22:12,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:22:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_02bcc14b-a98c-42cd-927d-94e1f0cdf02c/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 [2020-12-01 15:22:12,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-01 15:22:12,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 15:22:12,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-01 15:22:12,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-01 15:22:12,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 15:22:12,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 15:22:12,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-01 15:22:13,096 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 15:22:13,096 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-01 15:22:13,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:22:13 BoogieIcfgContainer [2020-12-01 15:22:13,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 15:22:13,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-01 15:22:13,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-01 15:22:13,104 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-01 15:22:13,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 03:22:12" (1/3) ... [2020-12-01 15:22:13,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a996636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:22:13, skipping insertion in model container [2020-12-01 15:22:13,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:22:12" (2/3) ... [2020-12-01 15:22:13,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a996636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:22:13, skipping insertion in model container [2020-12-01 15:22:13,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:22:13" (3/3) ... [2020-12-01 15:22:13,108 INFO L111 eAbstractionObserver]: Analyzing ICFG nsqmf.c [2020-12-01 15:22:13,122 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-01 15:22:13,126 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-01 15:22:13,141 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-01 15:22:13,195 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-01 15:22:13,196 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-01 15:22:13,196 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-01 15:22:13,196 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 15:22:13,196 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 15:22:13,196 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-01 15:22:13,197 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 15:22:13,197 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-01 15:22:13,210 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-12-01 15:22:13,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-01 15:22:13,216 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:22:13,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:22:13,217 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:22:13,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:22:13,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2020-12-01 15:22:13,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:22:13,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444107391] [2020-12-01 15:22:13,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:22:13,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:22:13,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:22:13,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444107391] [2020-12-01 15:22:13,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:22:13,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-01 15:22:13,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439765813] [2020-12-01 15:22:13,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-01 15:22:13,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:22:13,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-01 15:22:13,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-01 15:22:13,408 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-12-01 15:22:13,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:22:13,426 INFO L93 Difference]: Finished difference Result 39 states and 53 transitions. [2020-12-01 15:22:13,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-01 15:22:13,428 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-12-01 15:22:13,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:22:13,436 INFO L225 Difference]: With dead ends: 39 [2020-12-01 15:22:13,437 INFO L226 Difference]: Without dead ends: 17 [2020-12-01 15:22:13,440 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 [2020-12-01 15:22:13,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-01 15:22:13,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-01 15:22:13,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-01 15:22:13,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-12-01 15:22:13,473 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2020-12-01 15:22:13,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:22:13,473 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-12-01 15:22:13,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-01 15:22:13,473 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-12-01 15:22:13,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-01 15:22:13,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:22:13,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:22:13,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-01 15:22:13,475 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:22:13,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:22:13,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2020-12-01 15:22:13,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:22:13,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914309357] [2020-12-01 15:22:13,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:22:13,505 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-01 15:22:13,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1164829845] [2020-12-01 15:22:13,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_02bcc14b-a98c-42cd-927d-94e1f0cdf02c/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 [2020-12-01 15:22:13,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:22:13,620 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:22:13,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:22:13,646 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:22:13,703 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:22:13,703 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-01 15:22:13,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-01 15:22:13,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 03:22:13 BoogieIcfgContainer [2020-12-01 15:22:13,983 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-01 15:22:13,984 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 15:22:13,984 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 15:22:13,984 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 15:22:13,985 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:22:13" (3/4) ... [2020-12-01 15:22:13,987 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-01 15:22:14,060 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_02bcc14b-a98c-42cd-927d-94e1f0cdf02c/bin/uautomizer/witness.graphml [2020-12-01 15:22:14,062 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 15:22:14,065 INFO L168 Benchmark]: Toolchain (without parser) took 1708.68 ms. Allocated memory is still 121.6 MB. Free memory was 93.5 MB in the beginning and 85.2 MB in the end (delta: 8.3 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. [2020-12-01 15:22:14,066 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 83.9 MB. Free memory is still 41.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:22:14,069 INFO L168 Benchmark]: CACSL2BoogieTranslator took 329.39 ms. Allocated memory is still 121.6 MB. Free memory was 93.2 MB in the beginning and 98.5 MB in the end (delta: -5.3 MB). Peak memory consumption was 11.9 MB. Max. memory is 16.1 GB. [2020-12-01 15:22:14,070 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.20 ms. Allocated memory is still 121.6 MB. Free memory was 98.5 MB in the beginning and 97.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:22:14,070 INFO L168 Benchmark]: Boogie Preprocessor took 26.87 ms. Allocated memory is still 121.6 MB. Free memory was 96.8 MB in the beginning and 96.0 MB in the end (delta: 789.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:22:14,071 INFO L168 Benchmark]: RCFGBuilder took 335.60 ms. Allocated memory is still 121.6 MB. Free memory was 95.6 MB in the beginning and 81.4 MB in the end (delta: 14.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-01 15:22:14,071 INFO L168 Benchmark]: TraceAbstraction took 882.77 ms. Allocated memory is still 121.6 MB. Free memory was 80.9 MB in the beginning and 87.3 MB in the end (delta: -6.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:22:14,072 INFO L168 Benchmark]: Witness Printer took 78.15 ms. Allocated memory is still 121.6 MB. Free memory was 87.3 MB in the beginning and 85.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:22:14,074 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 83.9 MB. Free memory is still 41.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 329.39 ms. Allocated memory is still 121.6 MB. Free memory was 93.2 MB in the beginning and 98.5 MB in the end (delta: -5.3 MB). Peak memory consumption was 11.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.20 ms. Allocated memory is still 121.6 MB. Free memory was 98.5 MB in the beginning and 97.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.87 ms. Allocated memory is still 121.6 MB. Free memory was 96.8 MB in the beginning and 96.0 MB in the end (delta: 789.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 335.60 ms. Allocated memory is still 121.6 MB. Free memory was 95.6 MB in the beginning and 81.4 MB in the end (delta: 14.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 882.77 ms. Allocated memory is still 121.6 MB. Free memory was 80.9 MB in the beginning and 87.3 MB in the end (delta: -6.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 78.15 ms. Allocated memory is still 121.6 MB. Free memory was 87.3 MB in the beginning and 85.4 MB in the end (delta: 1.9 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: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=1] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] b[0] = 1 [L32] a[0] = 1 [L34] i=1 VAL [N=1] [L34] COND FALSE !(i