./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/eqn4f.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_548420c9-66b8-4427-90f0-99c3741a981e/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_548420c9-66b8-4427-90f0-99c3741a981e/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_548420c9-66b8-4427-90f0-99c3741a981e/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_548420c9-66b8-4427-90f0-99c3741a981e/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/eqn4f.c -s /tmp/vcloud-vcloud-master/worker/run_dir_548420c9-66b8-4427-90f0-99c3741a981e/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_548420c9-66b8-4427-90f0-99c3741a981e/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 e15f9f595d1ef0e46497d76d31df562aa2e85d85 ......................................................................................................................................................................................................................................................................... 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 07:36:50,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:36:50,155 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:36:50,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:36:50,208 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:36:50,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:36:50,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:36:50,213 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:36:50,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:36:50,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:36:50,218 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:36:50,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:36:50,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:36:50,221 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:36:50,223 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:36:50,224 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:36:50,225 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:36:50,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:36:50,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:36:50,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:36:50,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:36:50,234 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:36:50,235 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:36:50,236 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:36:50,239 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:36:50,240 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:36:50,240 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:36:50,241 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:36:50,242 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:36:50,243 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:36:50,243 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:36:50,244 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:36:50,245 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:36:50,246 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:36:50,247 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:36:50,248 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:36:50,248 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:36:50,249 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:36:50,249 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:36:50,250 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:36:50,251 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:36:50,251 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_548420c9-66b8-4427-90f0-99c3741a981e/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:36:50,275 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:36:50,275 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:36:50,276 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:36:50,276 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:36:50,276 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:36:50,277 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:36:50,277 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:36:50,277 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:36:50,277 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:36:50,277 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:36:50,278 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:36:50,278 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:36:50,278 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:36:50,278 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:36:50,278 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:36:50,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:36:50,279 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:36:50,280 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:36:50,280 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:36:50,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:36:50,280 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:36:50,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:36:50,280 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:36:50,281 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:36:50,281 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:36:50,281 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:36:50,281 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:36:50,281 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:36:50,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:36:50,282 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:36:50,282 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:36:50,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:36:50,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:36:50,283 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:36:50,283 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:36:50,283 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:36:50,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:36:50,283 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:36:50,283 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:36:50,284 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:36:50,284 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_548420c9-66b8-4427-90f0-99c3741a981e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_548420c9-66b8-4427-90f0-99c3741a981e/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e15f9f595d1ef0e46497d76d31df562aa2e85d85 [2020-11-28 07:36:50,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:36:50,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:36:50,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:36:50,590 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:36:50,595 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:36:50,596 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_548420c9-66b8-4427-90f0-99c3741a981e/bin/utaipan/../../sv-benchmarks/c/array-fpi/eqn4f.c [2020-11-28 07:36:50,669 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_548420c9-66b8-4427-90f0-99c3741a981e/bin/utaipan/data/9491a0aa1/03855211348445db92dde8b8cdfb38a3/FLAGe82fd076e [2020-11-28 07:36:51,053 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:36:51,053 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_548420c9-66b8-4427-90f0-99c3741a981e/sv-benchmarks/c/array-fpi/eqn4f.c [2020-11-28 07:36:51,060 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_548420c9-66b8-4427-90f0-99c3741a981e/bin/utaipan/data/9491a0aa1/03855211348445db92dde8b8cdfb38a3/FLAGe82fd076e [2020-11-28 07:36:51,478 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_548420c9-66b8-4427-90f0-99c3741a981e/bin/utaipan/data/9491a0aa1/03855211348445db92dde8b8cdfb38a3 [2020-11-28 07:36:51,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:36:51,482 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:36:51,488 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:36:51,488 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:36:51,491 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:36:51,492 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:36:51" (1/1) ... [2020-11-28 07:36:51,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a6abae1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:51, skipping insertion in model container [2020-11-28 07:36:51,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:36:51" (1/1) ... [2020-11-28 07:36:51,512 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:36:51,527 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:36:51,729 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:36:51,750 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:36:51,791 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:36:51,808 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:36:51,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:51 WrapperNode [2020-11-28 07:36:51,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:36:51,811 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:36:51,811 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:36:51,811 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:36:51,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:51" (1/1) ... [2020-11-28 07:36:51,837 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:51" (1/1) ... [2020-11-28 07:36:51,864 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:36:51,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:36:51,866 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:36:51,866 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:36:51,875 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:51" (1/1) ... [2020-11-28 07:36:51,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:51" (1/1) ... [2020-11-28 07:36:51,881 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:51" (1/1) ... [2020-11-28 07:36:51,881 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:51" (1/1) ... [2020-11-28 07:36:51,895 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:51" (1/1) ... [2020-11-28 07:36:51,901 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:51" (1/1) ... [2020-11-28 07:36:51,909 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:51" (1/1) ... [2020-11-28 07:36:51,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:36:51,917 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:36:51,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:36:51,919 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:36:51,920 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_548420c9-66b8-4427-90f0-99c3741a981e/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 07:36:51,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:36:52,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:36:52,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:36:52,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 07:36:52,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:36:52,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:36:52,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 07:36:52,488 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:36:52,488 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-28 07:36:52,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:36:52 BoogieIcfgContainer [2020-11-28 07:36:52,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:36:52,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:36:52,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:36:52,499 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:36:52,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:36:51" (1/3) ... [2020-11-28 07:36:52,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14430aa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:36:52, skipping insertion in model container [2020-11-28 07:36:52,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:36:51" (2/3) ... [2020-11-28 07:36:52,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14430aa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:36:52, skipping insertion in model container [2020-11-28 07:36:52,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:36:52" (3/3) ... [2020-11-28 07:36:52,503 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn4f.c [2020-11-28 07:36:52,514 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:36:52,519 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:36:52,531 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:36:52,584 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:36:52,587 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:36:52,588 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:36:52,588 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:36:52,588 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:36:52,588 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:36:52,588 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:36:52,588 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:36:52,606 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-11-28 07:36:52,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 07:36:52,611 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:36:52,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:36:52,613 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:36:52,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:36:52,627 INFO L82 PathProgramCache]: Analyzing trace with hash -704094291, now seen corresponding path program 1 times [2020-11-28 07:36:52,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:36:52,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516245228] [2020-11-28 07:36:52,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:36:52,790 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:36:52,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579895183] [2020-11-28 07:36:52,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_548420c9-66b8-4427-90f0-99c3741a981e/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 07:36:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:36:52,885 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:36:52,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:36:52,915 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:36:52,946 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:36:52,947 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:36:53,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-11-28 07:36:53,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:36:53 BoogieIcfgContainer [2020-11-28 07:36:53,192 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:36:53,193 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:36:53,193 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:36:53,193 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:36:53,194 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:36:52" (3/4) ... [2020-11-28 07:36:53,195 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:36:53,243 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_548420c9-66b8-4427-90f0-99c3741a981e/bin/utaipan/witness.graphml [2020-11-28 07:36:53,243 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:36:53,245 INFO L168 Benchmark]: Toolchain (without parser) took 1761.80 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 47.1 MB in the beginning and 62.0 MB in the end (delta: -14.9 MB). Peak memory consumption was 4.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:36:53,246 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 86.0 MB. Free memory is still 63.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:36:53,247 INFO L168 Benchmark]: CACSL2BoogieTranslator took 322.19 ms. Allocated memory is still 86.0 MB. Free memory was 46.9 MB in the beginning and 62.1 MB in the end (delta: -15.2 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:36:53,248 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.62 ms. Allocated memory is still 86.0 MB. Free memory was 61.9 MB in the beginning and 60.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:36:53,249 INFO L168 Benchmark]: Boogie Preprocessor took 50.66 ms. Allocated memory is still 86.0 MB. Free memory was 60.4 MB in the beginning and 59.3 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:36:53,249 INFO L168 Benchmark]: RCFGBuilder took 573.40 ms. Allocated memory is still 86.0 MB. Free memory was 59.2 MB in the beginning and 36.9 MB in the end (delta: 22.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:36:53,250 INFO L168 Benchmark]: TraceAbstraction took 700.57 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 36.5 MB in the beginning and 64.1 MB in the end (delta: -27.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:36:53,251 INFO L168 Benchmark]: Witness Printer took 50.68 ms. Allocated memory is still 104.9 MB. Free memory was 64.1 MB in the beginning and 62.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:36:53,255 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 86.0 MB. Free memory is still 63.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 322.19 ms. Allocated memory is still 86.0 MB. Free memory was 46.9 MB in the beginning and 62.1 MB in the end (delta: -15.2 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.62 ms. Allocated memory is still 86.0 MB. Free memory was 61.9 MB in the beginning and 60.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 50.66 ms. Allocated memory is still 86.0 MB. Free memory was 60.4 MB in the beginning and 59.3 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 573.40 ms. Allocated memory is still 86.0 MB. Free memory was 59.2 MB in the beginning and 36.9 MB in the end (delta: 22.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 700.57 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 36.5 MB in the beginning and 64.1 MB in the end (delta: -27.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 50.68 ms. Allocated memory is still 104.9 MB. Free memory was 64.1 MB in the beginning and 62.0 MB in the end (delta: 2.1 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] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 8 [L32] b[0] = 0 [L33] i=1 VAL [N=1] [L33] COND FALSE !(i