./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/modnf.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_42f1d778-f9e5-420c-8dac-a2198e9b824f/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_42f1d778-f9e5-420c-8dac-a2198e9b824f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_42f1d778-f9e5-420c-8dac-a2198e9b824f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_42f1d778-f9e5-420c-8dac-a2198e9b824f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/modnf.c -s /tmp/vcloud-vcloud-master/worker/run_dir_42f1d778-f9e5-420c-8dac-a2198e9b824f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_42f1d778-f9e5-420c-8dac-a2198e9b824f/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 156fe9121429f10a5a1235e1caef89fd043b12c8 ............................................................................................................................................................................................................................................................................................................................................................... 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 07:26:46,998 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:26:47,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:26:47,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:26:47,045 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:26:47,046 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:26:47,048 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:26:47,051 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:26:47,053 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:26:47,055 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:26:47,056 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:26:47,057 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:26:47,058 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:26:47,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:26:47,061 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:26:47,062 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:26:47,063 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:26:47,065 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:26:47,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:26:47,070 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:26:47,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:26:47,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:26:47,084 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:26:47,085 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:26:47,089 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:26:47,090 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:26:47,090 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:26:47,091 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:26:47,092 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:26:47,093 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:26:47,094 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:26:47,095 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:26:47,096 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:26:47,097 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:26:47,099 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:26:47,099 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:26:47,100 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:26:47,100 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:26:47,101 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:26:47,102 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:26:47,103 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:26:47,104 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_42f1d778-f9e5-420c-8dac-a2198e9b824f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:26:47,144 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:26:47,144 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:26:47,145 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:26:47,145 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:26:47,146 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:26:47,146 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:26:47,146 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:26:47,147 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:26:47,147 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:26:47,147 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:26:47,148 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:26:47,148 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:26:47,149 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:26:47,149 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:26:47,149 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:26:47,150 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:26:47,150 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:26:47,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:26:47,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:26:47,151 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:26:47,151 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:26:47,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:26:47,151 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:26:47,151 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:26:47,151 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:26:47,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:26:47,152 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:26:47,152 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:26:47,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:26:47,152 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:26:47,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:26:47,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:26:47,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:26:47,153 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:26:47,153 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:26:47,153 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:26:47,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:26:47,154 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:26:47,154 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:26:47,154 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:26:47,154 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_42f1d778-f9e5-420c-8dac-a2198e9b824f/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_42f1d778-f9e5-420c-8dac-a2198e9b824f/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 156fe9121429f10a5a1235e1caef89fd043b12c8 [2020-11-28 07:26:47,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:26:47,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:26:47,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:26:47,478 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:26:47,479 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:26:47,480 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_42f1d778-f9e5-420c-8dac-a2198e9b824f/bin/utaipan/../../sv-benchmarks/c/array-fpi/modnf.c [2020-11-28 07:26:47,544 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_42f1d778-f9e5-420c-8dac-a2198e9b824f/bin/utaipan/data/02bf8732c/25122c4ab7304da39c4542aaf27a478f/FLAGc02099e7f [2020-11-28 07:26:48,103 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:26:48,104 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_42f1d778-f9e5-420c-8dac-a2198e9b824f/sv-benchmarks/c/array-fpi/modnf.c [2020-11-28 07:26:48,110 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_42f1d778-f9e5-420c-8dac-a2198e9b824f/bin/utaipan/data/02bf8732c/25122c4ab7304da39c4542aaf27a478f/FLAGc02099e7f [2020-11-28 07:26:48,482 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_42f1d778-f9e5-420c-8dac-a2198e9b824f/bin/utaipan/data/02bf8732c/25122c4ab7304da39c4542aaf27a478f [2020-11-28 07:26:48,485 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:26:48,486 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:26:48,488 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:26:48,488 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:26:48,492 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:26:48,493 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:26:48" (1/1) ... [2020-11-28 07:26:48,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73549109 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:26:48, skipping insertion in model container [2020-11-28 07:26:48,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:26:48" (1/1) ... [2020-11-28 07:26:48,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:26:48,525 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:26:48,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:26:48,813 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:26:48,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:26:48,846 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:26:48,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:26:48 WrapperNode [2020-11-28 07:26:48,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:26:48,848 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:26:48,848 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:26:48,849 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:26:48,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:26:48" (1/1) ... [2020-11-28 07:26:48,863 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:26:48" (1/1) ... [2020-11-28 07:26:48,884 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:26:48,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:26:48,885 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:26:48,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:26:48,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:26:48" (1/1) ... [2020-11-28 07:26:48,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:26:48" (1/1) ... [2020-11-28 07:26:48,896 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:26:48" (1/1) ... [2020-11-28 07:26:48,897 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:26:48" (1/1) ... [2020-11-28 07:26:48,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:26:48" (1/1) ... [2020-11-28 07:26:48,907 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:26:48" (1/1) ... [2020-11-28 07:26:48,909 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:26:48" (1/1) ... [2020-11-28 07:26:48,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:26:48,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:26:48,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:26:48,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:26:48,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:26:48" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_42f1d778-f9e5-420c-8dac-a2198e9b824f/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:26:48,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:26:48,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:26:48,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:26:48,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 07:26:48,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:26:48,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:26:48,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 07:26:48,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 07:26:49,470 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:26:49,470 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-28 07:26:49,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:26:49 BoogieIcfgContainer [2020-11-28 07:26:49,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:26:49,474 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:26:49,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:26:49,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:26:49,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:26:48" (1/3) ... [2020-11-28 07:26:49,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d56bf7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:26:49, skipping insertion in model container [2020-11-28 07:26:49,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:26:48" (2/3) ... [2020-11-28 07:26:49,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d56bf7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:26:49, skipping insertion in model container [2020-11-28 07:26:49,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:26:49" (3/3) ... [2020-11-28 07:26:49,490 INFO L111 eAbstractionObserver]: Analyzing ICFG modnf.c [2020-11-28 07:26:49,501 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:26:49,508 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:26:49,524 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:26:49,566 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:26:49,566 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:26:49,566 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:26:49,566 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:26:49,566 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:26:49,567 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:26:49,567 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:26:49,567 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:26:49,579 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-11-28 07:26:49,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 07:26:49,588 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:26:49,589 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:26:49,589 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:26:49,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:26:49,597 INFO L82 PathProgramCache]: Analyzing trace with hash -535179321, now seen corresponding path program 1 times [2020-11-28 07:26:49,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:26:49,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095678202] [2020-11-28 07:26:49,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:26:49,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:26:49,838 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 07:26:49,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095678202] [2020-11-28 07:26:49,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:26:49,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:26:49,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785929426] [2020-11-28 07:26:49,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:26:49,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:26:49,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:26:49,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:26:49,865 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2020-11-28 07:26:49,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:26:49,916 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2020-11-28 07:26:49,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:26:49,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-11-28 07:26:49,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:26:49,926 INFO L225 Difference]: With dead ends: 20 [2020-11-28 07:26:49,926 INFO L226 Difference]: Without dead ends: 10 [2020-11-28 07:26:49,929 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 07:26:49,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-11-28 07:26:49,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-11-28 07:26:49,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-28 07:26:49,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2020-11-28 07:26:49,964 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2020-11-28 07:26:49,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:26:49,965 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2020-11-28 07:26:49,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:26:49,965 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2020-11-28 07:26:49,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 07:26:49,966 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:26:49,966 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:26:49,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:26:49,967 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:26:49,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:26:49,970 INFO L82 PathProgramCache]: Analyzing trace with hash 420303000, now seen corresponding path program 1 times [2020-11-28 07:26:49,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:26:49,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957314054] [2020-11-28 07:26:49,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:26:50,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:26:50,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:26:50,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957314054] [2020-11-28 07:26:50,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:26:50,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:26:50,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218432353] [2020-11-28 07:26:50,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:26:50,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:26:50,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:26:50,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:26:50,077 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 4 states. [2020-11-28 07:26:50,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:26:50,125 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-11-28 07:26:50,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:26:50,126 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-28 07:26:50,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:26:50,127 INFO L225 Difference]: With dead ends: 21 [2020-11-28 07:26:50,127 INFO L226 Difference]: Without dead ends: 16 [2020-11-28 07:26:50,128 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 07:26:50,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-28 07:26:50,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2020-11-28 07:26:50,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-28 07:26:50,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2020-11-28 07:26:50,132 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2020-11-28 07:26:50,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:26:50,132 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2020-11-28 07:26:50,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:26:50,132 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2020-11-28 07:26:50,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 07:26:50,133 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:26:50,133 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:26:50,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:26:50,133 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:26:50,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:26:50,134 INFO L82 PathProgramCache]: Analyzing trace with hash 140794138, now seen corresponding path program 1 times [2020-11-28 07:26:50,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:26:50,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907011072] [2020-11-28 07:26:50,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:26:50,156 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:26:50,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341394978] [2020-11-28 07:26:50,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_42f1d778-f9e5-420c-8dac-a2198e9b824f/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:26:50,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:26:50,218 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:26:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:26:50,238 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:26:50,270 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:26:50,276 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:26:50,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-28 07:26:50,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:26:50 BoogieIcfgContainer [2020-11-28 07:26:50,502 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:26:50,502 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:26:50,503 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:26:50,503 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:26:50,503 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:26:49" (3/4) ... [2020-11-28 07:26:50,505 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:26:50,546 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_42f1d778-f9e5-420c-8dac-a2198e9b824f/bin/utaipan/witness.graphml [2020-11-28 07:26:50,546 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:26:50,548 INFO L168 Benchmark]: Toolchain (without parser) took 2060.76 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 73.9 MB in the beginning and 79.6 MB in the end (delta: -5.6 MB). Peak memory consumption was 15.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:26:50,549 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 98.6 MB. Free memory is still 55.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:26:50,550 INFO L168 Benchmark]: CACSL2BoogieTranslator took 359.84 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 73.7 MB in the beginning and 97.2 MB in the end (delta: -23.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:26:50,551 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.82 ms. Allocated memory is still 119.5 MB. Free memory was 96.9 MB in the beginning and 95.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:26:50,551 INFO L168 Benchmark]: Boogie Preprocessor took 26.12 ms. Allocated memory is still 119.5 MB. Free memory was 95.4 MB in the beginning and 94.3 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:26:50,552 INFO L168 Benchmark]: RCFGBuilder took 560.55 ms. Allocated memory is still 119.5 MB. Free memory was 94.3 MB in the beginning and 72.1 MB in the end (delta: 22.2 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:26:50,553 INFO L168 Benchmark]: TraceAbstraction took 1028.06 ms. Allocated memory is still 119.5 MB. Free memory was 71.4 MB in the beginning and 81.5 MB in the end (delta: -10.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:26:50,553 INFO L168 Benchmark]: Witness Printer took 43.65 ms. Allocated memory is still 119.5 MB. Free memory was 81.5 MB in the beginning and 79.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:26:50,557 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 98.6 MB. Free memory is still 55.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 359.84 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 73.7 MB in the beginning and 97.2 MB in the end (delta: -23.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.82 ms. Allocated memory is still 119.5 MB. Free memory was 96.9 MB in the beginning and 95.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.12 ms. Allocated memory is still 119.5 MB. Free memory was 95.4 MB in the beginning and 94.3 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 560.55 ms. Allocated memory is still 119.5 MB. Free memory was 94.3 MB in the beginning and 72.1 MB in the end (delta: 22.2 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1028.06 ms. Allocated memory is still 119.5 MB. Free memory was 71.4 MB in the beginning and 81.5 MB in the end (delta: -10.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 43.65 ms. Allocated memory is still 119.5 MB. Free memory was 81.5 MB in the beginning and 79.6 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; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] int i; [L28] int sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 0 [L32] i=0 VAL [N=1] [L32] COND TRUE i