./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 f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_8dcc543c-9ee4-4bc1-8ea4-2e16a69a14b9/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_8dcc543c-9ee4-4bc1-8ea4-2e16a69a14b9/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_8dcc543c-9ee4-4bc1-8ea4-2e16a69a14b9/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_8dcc543c-9ee4-4bc1-8ea4-2e16a69a14b9/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/modnf.c -s /tmp/vcloud-vcloud-master/worker/run_dir_8dcc543c-9ee4-4bc1-8ea4-2e16a69a14b9/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_8dcc543c-9ee4-4bc1-8ea4-2e16a69a14b9/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3fd3ccab48e72f12ae121d44bf0e0da956d21d01 ................................................................................................................................................................................................................................................................................................................................................... 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 0.1.25-f470102 [2019-12-07 15:55:53,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 15:55:53,215 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 15:55:53,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 15:55:53,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 15:55:53,223 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 15:55:53,224 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 15:55:53,226 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 15:55:53,227 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 15:55:53,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 15:55:53,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 15:55:53,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 15:55:53,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 15:55:53,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 15:55:53,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 15:55:53,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 15:55:53,232 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 15:55:53,233 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 15:55:53,234 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 15:55:53,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 15:55:53,237 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 15:55:53,238 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 15:55:53,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 15:55:53,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 15:55:53,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 15:55:53,241 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 15:55:53,241 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 15:55:53,241 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 15:55:53,242 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 15:55:53,242 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 15:55:53,243 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 15:55:53,243 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 15:55:53,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 15:55:53,244 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 15:55:53,245 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 15:55:53,245 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 15:55:53,246 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 15:55:53,246 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 15:55:53,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 15:55:53,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 15:55:53,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 15:55:53,248 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_8dcc543c-9ee4-4bc1-8ea4-2e16a69a14b9/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 15:55:53,261 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 15:55:53,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 15:55:53,262 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 15:55:53,262 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 15:55:53,262 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 15:55:53,263 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 15:55:53,263 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 15:55:53,263 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 15:55:53,263 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 15:55:53,263 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 15:55:53,264 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 15:55:53,264 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 15:55:53,264 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 15:55:53,264 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 15:55:53,264 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 15:55:53,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 15:55:53,265 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 15:55:53,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 15:55:53,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 15:55:53,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 15:55:53,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 15:55:53,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 15:55:53,266 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 15:55:53,266 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 15:55:53,266 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 15:55:53,266 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 15:55:53,267 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 15:55:53,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 15:55:53,267 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 15:55:53,267 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 15:55:53,267 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 15:55:53,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 15:55:53,267 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 15:55:53,267 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 15:55:53,268 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 15:55:53,268 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 15:55:53,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 15:55:53,268 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 15:55:53,268 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 15:55:53,268 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 15:55:53,268 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_8dcc543c-9ee4-4bc1-8ea4-2e16a69a14b9/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(__VERIFIER_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 -> 3fd3ccab48e72f12ae121d44bf0e0da956d21d01 [2019-12-07 15:55:53,366 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 15:55:53,374 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 15:55:53,376 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 15:55:53,377 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 15:55:53,378 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 15:55:53,378 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_8dcc543c-9ee4-4bc1-8ea4-2e16a69a14b9/bin/utaipan/../../sv-benchmarks/c/array-fpi/modnf.c [2019-12-07 15:55:53,414 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8dcc543c-9ee4-4bc1-8ea4-2e16a69a14b9/bin/utaipan/data/21f4c2849/c77fc707ebef4c6dae7be0a4941d1045/FLAG05558ab27 [2019-12-07 15:55:53,829 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 15:55:53,830 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_8dcc543c-9ee4-4bc1-8ea4-2e16a69a14b9/sv-benchmarks/c/array-fpi/modnf.c [2019-12-07 15:55:53,833 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8dcc543c-9ee4-4bc1-8ea4-2e16a69a14b9/bin/utaipan/data/21f4c2849/c77fc707ebef4c6dae7be0a4941d1045/FLAG05558ab27 [2019-12-07 15:55:53,842 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_8dcc543c-9ee4-4bc1-8ea4-2e16a69a14b9/bin/utaipan/data/21f4c2849/c77fc707ebef4c6dae7be0a4941d1045 [2019-12-07 15:55:53,843 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 15:55:53,844 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 15:55:53,845 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 15:55:53,845 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 15:55:53,847 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 15:55:53,848 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 03:55:53" (1/1) ... [2019-12-07 15:55:53,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55d9133a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:55:53, skipping insertion in model container [2019-12-07 15:55:53,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 03:55:53" (1/1) ... [2019-12-07 15:55:53,854 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 15:55:53,865 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 15:55:54,005 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 15:55:54,011 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 15:55:54,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 15:55:54,037 INFO L208 MainTranslator]: Completed translation [2019-12-07 15:55:54,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:55:54 WrapperNode [2019-12-07 15:55:54,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 15:55:54,038 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 15:55:54,038 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 15:55:54,038 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 15:55:54,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:55:54" (1/1) ... [2019-12-07 15:55:54,050 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:55:54" (1/1) ... [2019-12-07 15:55:54,064 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 15:55:54,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 15:55:54,064 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 15:55:54,065 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 15:55:54,071 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:55:54" (1/1) ... [2019-12-07 15:55:54,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:55:54" (1/1) ... [2019-12-07 15:55:54,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:55:54" (1/1) ... [2019-12-07 15:55:54,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:55:54" (1/1) ... [2019-12-07 15:55:54,079 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:55:54" (1/1) ... [2019-12-07 15:55:54,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:55:54" (1/1) ... [2019-12-07 15:55:54,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:55:54" (1/1) ... [2019-12-07 15:55:54,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 15:55:54,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 15:55:54,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 15:55:54,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 15:55:54,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:55:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8dcc543c-9ee4-4bc1-8ea4-2e16a69a14b9/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 [2019-12-07 15:55:54,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 15:55:54,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 15:55:54,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 15:55:54,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 15:55:54,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 15:55:54,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 15:55:54,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 15:55:54,312 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 15:55:54,312 INFO L287 CfgBuilder]: Removed 9 assume(true) statements. [2019-12-07 15:55:54,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 03:55:54 BoogieIcfgContainer [2019-12-07 15:55:54,313 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 15:55:54,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 15:55:54,313 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 15:55:54,315 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 15:55:54,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 03:55:53" (1/3) ... [2019-12-07 15:55:54,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@de3a2e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 03:55:54, skipping insertion in model container [2019-12-07 15:55:54,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:55:54" (2/3) ... [2019-12-07 15:55:54,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@de3a2e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 03:55:54, skipping insertion in model container [2019-12-07 15:55:54,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 03:55:54" (3/3) ... [2019-12-07 15:55:54,317 INFO L109 eAbstractionObserver]: Analyzing ICFG modnf.c [2019-12-07 15:55:54,323 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 15:55:54,327 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 15:55:54,334 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 15:55:54,349 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 15:55:54,349 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 15:55:54,349 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 15:55:54,349 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 15:55:54,349 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 15:55:54,349 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 15:55:54,349 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 15:55:54,349 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 15:55:54,359 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-12-07 15:55:54,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 15:55:54,363 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:55:54,364 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:55:54,364 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:55:54,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:55:54,367 INFO L82 PathProgramCache]: Analyzing trace with hash 2090946438, now seen corresponding path program 1 times [2019-12-07 15:55:54,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 15:55:54,373 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553246839] [2019-12-07 15:55:54,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:55:54,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:55:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:55:54,484 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553246839] [2019-12-07 15:55:54,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:55:54,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 15:55:54,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456589628] [2019-12-07 15:55:54,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 15:55:54,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 15:55:54,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 15:55:54,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 15:55:54,498 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-12-07 15:55:54,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:55:54,527 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2019-12-07 15:55:54,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 15:55:54,528 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-12-07 15:55:54,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:55:54,534 INFO L225 Difference]: With dead ends: 20 [2019-12-07 15:55:54,534 INFO L226 Difference]: Without dead ends: 10 [2019-12-07 15:55:54,536 INFO L630 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 [2019-12-07 15:55:54,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-12-07 15:55:54,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-12-07 15:55:54,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-12-07 15:55:54,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2019-12-07 15:55:54,557 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2019-12-07 15:55:54,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:55:54,558 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2019-12-07 15:55:54,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 15:55:54,558 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2019-12-07 15:55:54,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-07 15:55:54,558 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:55:54,558 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:55:54,558 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:55:54,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:55:54,558 INFO L82 PathProgramCache]: Analyzing trace with hash 225733525, now seen corresponding path program 1 times [2019-12-07 15:55:54,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 15:55:54,559 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266907947] [2019-12-07 15:55:54,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:55:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:55:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 15:55:54,592 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266907947] [2019-12-07 15:55:54,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:55:54,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 15:55:54,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096077] [2019-12-07 15:55:54,594 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 15:55:54,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 15:55:54,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 15:55:54,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 15:55:54,595 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 4 states. [2019-12-07 15:55:54,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:55:54,615 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2019-12-07 15:55:54,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 15:55:54,615 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-12-07 15:55:54,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:55:54,615 INFO L225 Difference]: With dead ends: 21 [2019-12-07 15:55:54,615 INFO L226 Difference]: Without dead ends: 16 [2019-12-07 15:55:54,616 INFO L630 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 [2019-12-07 15:55:54,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-12-07 15:55:54,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2019-12-07 15:55:54,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-12-07 15:55:54,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2019-12-07 15:55:54,619 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2019-12-07 15:55:54,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:55:54,619 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2019-12-07 15:55:54,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 15:55:54,619 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2019-12-07 15:55:54,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 15:55:54,619 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:55:54,619 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:55:54,619 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:55:54,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:55:54,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1595981671, now seen corresponding path program 1 times [2019-12-07 15:55:54,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 15:55:54,620 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034274974] [2019-12-07 15:55:54,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:55:54,629 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-12-07 15:55:54,629 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [457114658] [2019-12-07 15:55:54,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8dcc543c-9ee4-4bc1-8ea4-2e16a69a14b9/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 [2019-12-07 15:55:54,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:55:54,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:55:54,687 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-12-07 15:55:54,687 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 15:55:54,888 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 15:55:54,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 03:55:54 BoogieIcfgContainer [2019-12-07 15:55:54,943 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 15:55:54,943 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 15:55:54,943 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 15:55:54,944 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 15:55:54,944 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 03:55:54" (3/4) ... [2019-12-07 15:55:54,946 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 15:55:54,978 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_8dcc543c-9ee4-4bc1-8ea4-2e16a69a14b9/bin/utaipan/witness.graphml [2019-12-07 15:55:54,978 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 15:55:54,980 INFO L168 Benchmark]: Toolchain (without parser) took 1135.13 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 90.2 MB). Free memory was 942.4 MB in the beginning and 1.0 GB in the end (delta: -66.4 MB). Peak memory consumption was 23.8 MB. Max. memory is 11.5 GB. [2019-12-07 15:55:54,980 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 15:55:54,980 INFO L168 Benchmark]: CACSL2BoogieTranslator took 193.26 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 90.2 MB). Free memory was 942.4 MB in the beginning and 1.1 GB in the end (delta: -142.6 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-12-07 15:55:54,981 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.90 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 15:55:54,981 INFO L168 Benchmark]: Boogie Preprocessor took 21.79 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 15:55:54,982 INFO L168 Benchmark]: RCFGBuilder took 226.44 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. [2019-12-07 15:55:54,982 INFO L168 Benchmark]: TraceAbstraction took 629.71 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 43.6 MB). Peak memory consumption was 43.6 MB. Max. memory is 11.5 GB. [2019-12-07 15:55:54,983 INFO L168 Benchmark]: Witness Printer took 35.01 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 15:55:54,985 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 193.26 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 90.2 MB). Free memory was 942.4 MB in the beginning and 1.1 GB in the end (delta: -142.6 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 25.90 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.79 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 226.44 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 629.71 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 43.6 MB). Peak memory consumption was 43.6 MB. Max. memory is 11.5 GB. * Witness Printer took 35.01 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 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: [L14] int N; [L18] N = __VERIFIER_nondet_int() [L19] COND FALSE !(N <= 0) [L22] int i; [L23] int sum[1]; [L24] int *a = malloc(sizeof(int)*N); [L26] sum[0] = 0 [L27] i=0 VAL [N=1] [L27] COND TRUE i