./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/modsf.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_50dc1f2d-25be-4597-ba5a-106653f8fab0/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_50dc1f2d-25be-4597-ba5a-106653f8fab0/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_50dc1f2d-25be-4597-ba5a-106653f8fab0/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_50dc1f2d-25be-4597-ba5a-106653f8fab0/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/modsf.c -s /tmp/vcloud-vcloud-master/worker/run_dir_50dc1f2d-25be-4597-ba5a-106653f8fab0/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_50dc1f2d-25be-4597-ba5a-106653f8fab0/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 85b220978bb74f9e1328fc34d0757a27ef5e1bc9 ............................................................................................................................................................................................................................................................................................................................................................................. 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 03:02:34,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:02:34,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:02:34,818 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:02:34,819 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:02:34,820 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:02:34,822 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:02:34,824 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:02:34,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:02:34,831 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:02:34,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:02:34,834 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:02:34,834 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:02:34,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:02:34,837 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:02:34,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:02:34,843 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:02:34,855 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:02:34,857 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:02:34,859 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:02:34,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:02:34,867 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:02:34,870 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:02:34,871 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:02:34,883 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:02:34,883 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:02:34,884 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:02:34,886 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:02:34,887 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:02:34,888 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:02:34,889 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:02:34,890 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:02:34,892 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:02:34,893 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:02:34,894 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:02:34,895 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:02:34,895 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:02:34,896 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:02:34,896 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:02:34,897 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:02:34,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:02:34,900 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_50dc1f2d-25be-4597-ba5a-106653f8fab0/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 03:02:34,925 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:02:34,925 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:02:34,927 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:02:34,927 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:02:34,927 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:02:34,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:02:34,927 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:02:34,928 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:02:34,928 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:02:34,928 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:02:34,928 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:02:34,928 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:02:34,929 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:02:34,929 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:02:34,929 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:02:34,929 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:02:34,929 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:02:34,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:02:34,930 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:02:34,930 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:02:34,930 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:02:34,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:02:34,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:02:34,931 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:02:34,931 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:02:34,931 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:02:34,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:02:34,931 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:02:34,932 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:02:34,932 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_50dc1f2d-25be-4597-ba5a-106653f8fab0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_50dc1f2d-25be-4597-ba5a-106653f8fab0/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85b220978bb74f9e1328fc34d0757a27ef5e1bc9 [2020-11-28 03:02:35,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:02:35,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:02:35,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:02:35,206 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:02:35,207 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:02:35,208 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_50dc1f2d-25be-4597-ba5a-106653f8fab0/bin/uautomizer/../../sv-benchmarks/c/array-fpi/modsf.c [2020-11-28 03:02:35,282 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_50dc1f2d-25be-4597-ba5a-106653f8fab0/bin/uautomizer/data/0dfb87274/dbd6942520a24fc393b5a34228d3eb44/FLAG13b45a765 [2020-11-28 03:02:35,728 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:02:35,729 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_50dc1f2d-25be-4597-ba5a-106653f8fab0/sv-benchmarks/c/array-fpi/modsf.c [2020-11-28 03:02:35,740 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_50dc1f2d-25be-4597-ba5a-106653f8fab0/bin/uautomizer/data/0dfb87274/dbd6942520a24fc393b5a34228d3eb44/FLAG13b45a765 [2020-11-28 03:02:36,105 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_50dc1f2d-25be-4597-ba5a-106653f8fab0/bin/uautomizer/data/0dfb87274/dbd6942520a24fc393b5a34228d3eb44 [2020-11-28 03:02:36,108 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:02:36,109 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:02:36,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:02:36,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:02:36,139 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:02:36,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:02:36" (1/1) ... [2020-11-28 03:02:36,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33b68934 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:36, skipping insertion in model container [2020-11-28 03:02:36,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:02:36" (1/1) ... [2020-11-28 03:02:36,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:02:36,175 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:02:36,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:02:36,398 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:02:36,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:02:36,456 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:02:36,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:36 WrapperNode [2020-11-28 03:02:36,458 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:02:36,460 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:02:36,460 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:02:36,461 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:02:36,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:36" (1/1) ... [2020-11-28 03:02:36,475 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:36" (1/1) ... [2020-11-28 03:02:36,496 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:02:36,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:02:36,497 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:02:36,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:02:36,505 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:36" (1/1) ... [2020-11-28 03:02:36,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:36" (1/1) ... [2020-11-28 03:02:36,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:36" (1/1) ... [2020-11-28 03:02:36,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:36" (1/1) ... [2020-11-28 03:02:36,515 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:36" (1/1) ... [2020-11-28 03:02:36,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:36" (1/1) ... [2020-11-28 03:02:36,522 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:36" (1/1) ... [2020-11-28 03:02:36,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:02:36,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:02:36,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:02:36,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:02:36,527 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_50dc1f2d-25be-4597-ba5a-106653f8fab0/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 03:02:36,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:02:36,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:02:36,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 03:02:36,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 03:02:36,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:02:36,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:02:36,596 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 03:02:36,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 03:02:36,938 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:02:36,938 INFO L298 CfgBuilder]: Removed 15 assume(true) statements. [2020-11-28 03:02:36,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:02:36 BoogieIcfgContainer [2020-11-28 03:02:36,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:02:36,942 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:02:36,942 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:02:36,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:02:36,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:02:36" (1/3) ... [2020-11-28 03:02:36,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e1ed55b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:02:36, skipping insertion in model container [2020-11-28 03:02:36,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:36" (2/3) ... [2020-11-28 03:02:36,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e1ed55b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:02:36, skipping insertion in model container [2020-11-28 03:02:36,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:02:36" (3/3) ... [2020-11-28 03:02:36,951 INFO L111 eAbstractionObserver]: Analyzing ICFG modsf.c [2020-11-28 03:02:36,963 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:02:36,967 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 03:02:36,982 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 03:02:37,013 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:02:37,014 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:02:37,014 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:02:37,014 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:02:37,014 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:02:37,014 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:02:37,015 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:02:37,015 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:02:37,029 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-11-28 03:02:37,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 03:02:37,034 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:37,035 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:37,036 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:02:37,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:37,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1389277550, now seen corresponding path program 1 times [2020-11-28 03:02:37,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:37,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136352965] [2020-11-28 03:02:37,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:37,189 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 03:02:37,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136352965] [2020-11-28 03:02:37,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:02:37,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 03:02:37,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284907798] [2020-11-28 03:02:37,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 03:02:37,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:37,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 03:02:37,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 03:02:37,218 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-11-28 03:02:37,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:37,240 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2020-11-28 03:02:37,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 03:02:37,241 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2020-11-28 03:02:37,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:02:37,250 INFO L225 Difference]: With dead ends: 51 [2020-11-28 03:02:37,250 INFO L226 Difference]: Without dead ends: 23 [2020-11-28 03:02:37,253 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 03:02:37,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-28 03:02:37,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-28 03:02:37,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-28 03:02:37,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-11-28 03:02:37,294 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2020-11-28 03:02:37,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:02:37,295 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-11-28 03:02:37,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 03:02:37,296 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-11-28 03:02:37,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 03:02:37,297 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:37,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:37,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:02:37,299 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:02:37,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:37,303 INFO L82 PathProgramCache]: Analyzing trace with hash 796930410, now seen corresponding path program 1 times [2020-11-28 03:02:37,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:37,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166860683] [2020-11-28 03:02:37,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:37,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:37,483 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 03:02:37,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166860683] [2020-11-28 03:02:37,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:02:37,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:02:37,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944988523] [2020-11-28 03:02:37,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:02:37,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:37,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:02:37,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:02:37,486 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 4 states. [2020-11-28 03:02:37,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:37,618 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2020-11-28 03:02:37,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:02:37,620 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-11-28 03:02:37,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:02:37,643 INFO L225 Difference]: With dead ends: 53 [2020-11-28 03:02:37,644 INFO L226 Difference]: Without dead ends: 37 [2020-11-28 03:02:37,645 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 03:02:37,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-28 03:02:37,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2020-11-28 03:02:37,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-28 03:02:37,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-11-28 03:02:37,657 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 16 [2020-11-28 03:02:37,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:02:37,658 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-11-28 03:02:37,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:02:37,659 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-11-28 03:02:37,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-28 03:02:37,660 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:37,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:37,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:02:37,662 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:02:37,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:37,664 INFO L82 PathProgramCache]: Analyzing trace with hash 495241442, now seen corresponding path program 1 times [2020-11-28 03:02:37,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:37,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710363619] [2020-11-28 03:02:37,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:37,730 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:02:37,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1893585776] [2020-11-28 03:02:37,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_50dc1f2d-25be-4597-ba5a-106653f8fab0/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 03:02:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:02:37,800 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:02:37,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:02:37,826 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:02:37,861 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:02:37,868 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 03:02:38,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-28 03:02:38,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:02:38 BoogieIcfgContainer [2020-11-28 03:02:38,112 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:02:38,112 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:02:38,113 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:02:38,113 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:02:38,113 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:02:36" (3/4) ... [2020-11-28 03:02:38,115 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 03:02:38,169 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_50dc1f2d-25be-4597-ba5a-106653f8fab0/bin/uautomizer/witness.graphml [2020-11-28 03:02:38,169 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:02:38,171 INFO L168 Benchmark]: Toolchain (without parser) took 2060.95 ms. Allocated memory is still 104.9 MB. Free memory was 72.6 MB in the beginning and 60.6 MB in the end (delta: 12.0 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. [2020-11-28 03:02:38,172 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 67.1 MB. Free memory was 29.1 MB in the beginning and 29.1 MB in the end (delta: 33.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:02:38,173 INFO L168 Benchmark]: CACSL2BoogieTranslator took 322.79 ms. Allocated memory is still 104.9 MB. Free memory was 72.4 MB in the beginning and 81.3 MB in the end (delta: -9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:02:38,174 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.38 ms. Allocated memory is still 104.9 MB. Free memory was 81.3 MB in the beginning and 79.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:02:38,174 INFO L168 Benchmark]: Boogie Preprocessor took 27.43 ms. Allocated memory is still 104.9 MB. Free memory was 79.9 MB in the beginning and 78.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:02:38,175 INFO L168 Benchmark]: RCFGBuilder took 414.74 ms. Allocated memory is still 104.9 MB. Free memory was 78.3 MB in the beginning and 62.1 MB in the end (delta: 16.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-28 03:02:38,176 INFO L168 Benchmark]: TraceAbstraction took 1170.05 ms. Allocated memory is still 104.9 MB. Free memory was 61.5 MB in the beginning and 64.0 MB in the end (delta: -2.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:02:38,177 INFO L168 Benchmark]: Witness Printer took 56.75 ms. Allocated memory is still 104.9 MB. Free memory was 64.0 MB in the beginning and 60.6 MB in the end (delta: 3.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:02:38,181 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 67.1 MB. Free memory was 29.1 MB in the beginning and 29.1 MB in the end (delta: 33.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 322.79 ms. Allocated memory is still 104.9 MB. Free memory was 72.4 MB in the beginning and 81.3 MB in the end (delta: -9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.38 ms. Allocated memory is still 104.9 MB. Free memory was 81.3 MB in the beginning and 79.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.43 ms. Allocated memory is still 104.9 MB. Free memory was 79.9 MB in the beginning and 78.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 414.74 ms. Allocated memory is still 104.9 MB. Free memory was 78.3 MB in the beginning and 62.1 MB in the end (delta: 16.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1170.05 ms. Allocated memory is still 104.9 MB. Free memory was 61.5 MB in the beginning and 64.0 MB in the end (delta: -2.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 56.75 ms. Allocated memory is still 104.9 MB. Free memory was 64.0 MB in the beginning and 60.6 MB in the end (delta: 3.5 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 sum[1]; [L29] long long *a = malloc(sizeof(long long)*N); [L31] sum[0] = 0 [L32] i=0 VAL [N=1] [L32] COND TRUE i