./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/nsqm-iff.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e2d320-edea-4e8d-9f83-8e9c4f0317bc/bin/utaipan-tZwUujhuQw/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e2d320-edea-4e8d-9f83-8e9c4f0317bc/bin/utaipan-tZwUujhuQw/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e2d320-edea-4e8d-9f83-8e9c4f0317bc/bin/utaipan-tZwUujhuQw/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e2d320-edea-4e8d-9f83-8e9c4f0317bc/bin/utaipan-tZwUujhuQw/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/nsqm-iff.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e2d320-edea-4e8d-9f83-8e9c4f0317bc/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e2d320-edea-4e8d-9f83-8e9c4f0317bc/bin/utaipan-tZwUujhuQw --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 afabd041c1f9e44fb1eb4b2a4796412ceecc4ddc5ece54973c70db8b2f8169c2 .................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.1-dev-e943c26 [2021-10-20 05:15:58,100 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-20 05:15:58,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-20 05:15:58,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-20 05:15:58,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-20 05:15:58,166 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-20 05:15:58,168 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-20 05:15:58,172 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-20 05:15:58,175 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-20 05:15:58,180 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-20 05:15:58,182 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-20 05:15:58,183 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-20 05:15:58,184 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-20 05:15:58,187 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-20 05:15:58,189 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-20 05:15:58,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-20 05:15:58,200 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-20 05:15:58,201 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-20 05:15:58,204 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-20 05:15:58,214 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-20 05:15:58,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-20 05:15:58,217 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-20 05:15:58,221 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-20 05:15:58,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-20 05:15:58,231 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-20 05:15:58,231 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-20 05:15:58,232 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-20 05:15:58,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-20 05:15:58,235 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-20 05:15:58,236 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-20 05:15:58,237 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-20 05:15:58,237 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-20 05:15:58,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-20 05:15:58,241 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-20 05:15:58,242 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-20 05:15:58,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-20 05:15:58,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-20 05:15:58,244 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-20 05:15:58,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-20 05:15:58,245 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-20 05:15:58,245 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-20 05:15:58,246 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e2d320-edea-4e8d-9f83-8e9c4f0317bc/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-20 05:15:58,290 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-20 05:15:58,291 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-20 05:15:58,292 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-20 05:15:58,292 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-20 05:15:58,293 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-20 05:15:58,293 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-20 05:15:58,293 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-20 05:15:58,293 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-20 05:15:58,293 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-20 05:15:58,294 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-20 05:15:58,295 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-20 05:15:58,295 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-20 05:15:58,295 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-20 05:15:58,296 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-20 05:15:58,296 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-20 05:15:58,297 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-20 05:15:58,297 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-20 05:15:58,298 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-20 05:15:58,298 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-20 05:15:58,298 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-20 05:15:58,298 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-20 05:15:58,299 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-20 05:15:58,299 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-20 05:15:58,299 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-20 05:15:58,299 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-20 05:15:58,299 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-20 05:15:58,300 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-20 05:15:58,300 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-20 05:15:58,300 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-20 05:15:58,302 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-20 05:15:58,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 05:15:58,302 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-20 05:15:58,303 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-20 05:15:58,303 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-20 05:15:58,303 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-20 05:15:58,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-20 05:15:58,303 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-20 05:15:58,304 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-20 05:15:58,304 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-20 05:15:58,304 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_worker_vcloud-master_on_vcloud-master/run_dir_74e2d320-edea-4e8d-9f83-8e9c4f0317bc/bin/utaipan-tZwUujhuQw/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e2d320-edea-4e8d-9f83-8e9c4f0317bc/bin/utaipan-tZwUujhuQw Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> afabd041c1f9e44fb1eb4b2a4796412ceecc4ddc5ece54973c70db8b2f8169c2 [2021-10-20 05:15:58,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-20 05:15:58,611 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-20 05:15:58,613 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-20 05:15:58,615 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-20 05:15:58,616 INFO L275 PluginConnector]: CDTParser initialized [2021-10-20 05:15:58,617 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e2d320-edea-4e8d-9f83-8e9c4f0317bc/bin/utaipan-tZwUujhuQw/../../sv-benchmarks/c/array-fpi/nsqm-iff.c [2021-10-20 05:15:58,682 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e2d320-edea-4e8d-9f83-8e9c4f0317bc/bin/utaipan-tZwUujhuQw/data/f3708c61e/9ca120dee19d4c779bd1a2739cdef9a4/FLAGb3036f9fc [2021-10-20 05:15:59,165 INFO L306 CDTParser]: Found 1 translation units. [2021-10-20 05:15:59,167 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e2d320-edea-4e8d-9f83-8e9c4f0317bc/sv-benchmarks/c/array-fpi/nsqm-iff.c [2021-10-20 05:15:59,179 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e2d320-edea-4e8d-9f83-8e9c4f0317bc/bin/utaipan-tZwUujhuQw/data/f3708c61e/9ca120dee19d4c779bd1a2739cdef9a4/FLAGb3036f9fc [2021-10-20 05:15:59,526 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e2d320-edea-4e8d-9f83-8e9c4f0317bc/bin/utaipan-tZwUujhuQw/data/f3708c61e/9ca120dee19d4c779bd1a2739cdef9a4 [2021-10-20 05:15:59,529 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-20 05:15:59,530 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-20 05:15:59,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-20 05:15:59,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-20 05:15:59,536 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-20 05:15:59,537 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:15:59" (1/1) ... [2021-10-20 05:15:59,539 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f480c60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:15:59, skipping insertion in model container [2021-10-20 05:15:59,539 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:15:59" (1/1) ... [2021-10-20 05:15:59,548 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-20 05:15:59,565 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-20 05:15:59,756 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e2d320-edea-4e8d-9f83-8e9c4f0317bc/sv-benchmarks/c/array-fpi/nsqm-iff.c[591,604] [2021-10-20 05:15:59,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 05:15:59,791 INFO L203 MainTranslator]: Completed pre-run [2021-10-20 05:15:59,802 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e2d320-edea-4e8d-9f83-8e9c4f0317bc/sv-benchmarks/c/array-fpi/nsqm-iff.c[591,604] [2021-10-20 05:15:59,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 05:15:59,827 INFO L208 MainTranslator]: Completed translation [2021-10-20 05:15:59,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:15:59 WrapperNode [2021-10-20 05:15:59,828 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-20 05:15:59,829 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-20 05:15:59,829 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-20 05:15:59,829 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-20 05:15:59,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:15:59" (1/1) ... [2021-10-20 05:15:59,861 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:15:59" (1/1) ... [2021-10-20 05:15:59,888 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-20 05:15:59,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-20 05:15:59,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-20 05:15:59,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-20 05:15:59,898 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:15:59" (1/1) ... [2021-10-20 05:15:59,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:15:59" (1/1) ... [2021-10-20 05:15:59,901 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:15:59" (1/1) ... [2021-10-20 05:15:59,901 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:15:59" (1/1) ... [2021-10-20 05:15:59,907 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:15:59" (1/1) ... [2021-10-20 05:15:59,915 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:15:59" (1/1) ... [2021-10-20 05:15:59,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:15:59" (1/1) ... [2021-10-20 05:15:59,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-20 05:15:59,929 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-20 05:15:59,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-20 05:15:59,938 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-20 05:15:59,938 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:15:59" (1/1) ... [2021-10-20 05:15:59,945 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 05:15:59,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e2d320-edea-4e8d-9f83-8e9c4f0317bc/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 05:15:59,967 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e2d320-edea-4e8d-9f83-8e9c4f0317bc/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-20 05:15:59,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e2d320-edea-4e8d-9f83-8e9c4f0317bc/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-20 05:16:00,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-20 05:16:00,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-20 05:16:00,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-20 05:16:00,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-20 05:16:00,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-20 05:16:00,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-20 05:16:00,005 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-20 05:16:00,470 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-20 05:16:00,471 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-20 05:16:00,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:16:00 BoogieIcfgContainer [2021-10-20 05:16:00,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-20 05:16:00,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-20 05:16:00,476 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-20 05:16:00,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-20 05:16:00,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 05:15:59" (1/3) ... [2021-10-20 05:16:00,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@305e9a35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:16:00, skipping insertion in model container [2021-10-20 05:16:00,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:15:59" (2/3) ... [2021-10-20 05:16:00,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@305e9a35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:16:00, skipping insertion in model container [2021-10-20 05:16:00,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:16:00" (3/3) ... [2021-10-20 05:16:00,483 INFO L111 eAbstractionObserver]: Analyzing ICFG nsqm-iff.c [2021-10-20 05:16:00,488 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-20 05:16:00,488 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-20 05:16:00,587 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-20 05:16:00,598 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-20 05:16:00,598 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-20 05:16:00,615 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:16:00,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-20 05:16:00,622 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:16:00,623 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:16:00,623 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:16:00,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:16:00,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1095923036, now seen corresponding path program 1 times [2021-10-20 05:16:00,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:16:00,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830482309] [2021-10-20 05:16:00,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:16:00,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:16:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:16:00,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:16:00,963 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:16:00,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830482309] [2021-10-20 05:16:00,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830482309] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:16:00,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:16:00,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 05:16:00,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93608811] [2021-10-20 05:16:00,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:16:00,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:16:01,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:16:01,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:16:01,004 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:16:01,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:16:01,069 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2021-10-20 05:16:01,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:16:01,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-20 05:16:01,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:16:01,080 INFO L225 Difference]: With dead ends: 20 [2021-10-20 05:16:01,080 INFO L226 Difference]: Without dead ends: 10 [2021-10-20 05:16:01,083 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:16:01,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-20 05:16:01,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-20 05:16:01,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:16:01,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-10-20 05:16:01,115 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2021-10-20 05:16:01,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:16:01,116 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-10-20 05:16:01,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:16:01,116 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-10-20 05:16:01,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-20 05:16:01,117 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:16:01,117 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:16:01,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-20 05:16:01,118 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:16:01,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:16:01,122 INFO L82 PathProgramCache]: Analyzing trace with hash 255696374, now seen corresponding path program 1 times [2021-10-20 05:16:01,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:16:01,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664439291] [2021-10-20 05:16:01,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:16:01,123 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:16:01,170 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-20 05:16:01,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [730089289] [2021-10-20 05:16:01,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:16:01,183 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 05:16:01,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e2d320-edea-4e8d-9f83-8e9c4f0317bc/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 05:16:01,185 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e2d320-edea-4e8d-9f83-8e9c4f0317bc/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 05:16:01,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e2d320-edea-4e8d-9f83-8e9c4f0317bc/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-20 05:16:01,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:16:01,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-20 05:16:01,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 05:16:01,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-20 05:16:01,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 05:16:01,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-20 05:16:01,442 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:16:01,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664439291] [2021-10-20 05:16:01,443 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-20 05:16:01,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730089289] [2021-10-20 05:16:01,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730089289] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 05:16:01,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:16:01,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-10-20 05:16:01,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576963453] [2021-10-20 05:16:01,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-20 05:16:01,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:16:01,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-20 05:16:01,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 05:16:01,447 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:16:01,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:16:01,512 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-10-20 05:16:01,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-20 05:16:01,514 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-20 05:16:01,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:16:01,515 INFO L225 Difference]: With dead ends: 21 [2021-10-20 05:16:01,515 INFO L226 Difference]: Without dead ends: 16 [2021-10-20 05:16:01,516 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-20 05:16:01,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-20 05:16:01,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2021-10-20 05:16:01,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:16:01,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-10-20 05:16:01,519 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-10-20 05:16:01,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:16:01,520 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-10-20 05:16:01,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:16:01,520 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-10-20 05:16:01,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-20 05:16:01,521 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:16:01,521 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:16:01,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e2d320-edea-4e8d-9f83-8e9c4f0317bc/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-20 05:16:01,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e2d320-edea-4e8d-9f83-8e9c4f0317bc/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 05:16:01,747 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:16:01,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:16:01,748 INFO L82 PathProgramCache]: Analyzing trace with hash -652476163, now seen corresponding path program 1 times [2021-10-20 05:16:01,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:16:01,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389809592] [2021-10-20 05:16:01,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:16:01,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:16:01,771 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-20 05:16:01,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291994012] [2021-10-20 05:16:01,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:16:01,772 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 05:16:01,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e2d320-edea-4e8d-9f83-8e9c4f0317bc/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 05:16:01,774 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e2d320-edea-4e8d-9f83-8e9c4f0317bc/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 05:16:01,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e2d320-edea-4e8d-9f83-8e9c4f0317bc/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-20 05:16:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-20 05:16:01,856 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-20 05:16:01,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-20 05:16:01,908 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-20 05:16:01,908 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-20 05:16:01,909 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 05:16:01,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e2d320-edea-4e8d-9f83-8e9c4f0317bc/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-20 05:16:02,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e2d320-edea-4e8d-9f83-8e9c4f0317bc/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 05:16:02,133 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-20 05:16:02,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 05:16:02 BoogieIcfgContainer [2021-10-20 05:16:02,161 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-20 05:16:02,162 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-20 05:16:02,162 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-20 05:16:02,163 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-20 05:16:02,163 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:16:00" (3/4) ... [2021-10-20 05:16:02,165 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-20 05:16:02,218 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74e2d320-edea-4e8d-9f83-8e9c4f0317bc/bin/utaipan-tZwUujhuQw/witness.graphml [2021-10-20 05:16:02,218 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-20 05:16:02,220 INFO L168 Benchmark]: Toolchain (without parser) took 2688.68 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 67.0 MB in the beginning and 82.1 MB in the end (delta: -15.0 MB). Peak memory consumption was 5.8 MB. Max. memory is 16.1 GB. [2021-10-20 05:16:02,221 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 104.9 MB. Free memory is still 83.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:16:02,230 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.12 ms. Allocated memory is still 104.9 MB. Free memory was 66.8 MB in the beginning and 78.6 MB in the end (delta: -11.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-20 05:16:02,235 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.55 ms. Allocated memory is still 104.9 MB. Free memory was 78.6 MB in the beginning and 77.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 05:16:02,235 INFO L168 Benchmark]: Boogie Preprocessor took 39.51 ms. Allocated memory is still 104.9 MB. Free memory was 76.9 MB in the beginning and 76.0 MB in the end (delta: 890.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:16:02,236 INFO L168 Benchmark]: RCFGBuilder took 544.50 ms. Allocated memory is still 104.9 MB. Free memory was 76.0 MB in the beginning and 60.6 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-20 05:16:02,236 INFO L168 Benchmark]: TraceAbstraction took 1685.63 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 60.2 MB in the beginning and 84.2 MB in the end (delta: -24.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:16:02,237 INFO L168 Benchmark]: Witness Printer took 56.19 ms. Allocated memory is still 125.8 MB. Free memory was 84.2 MB in the beginning and 82.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 05:16:02,240 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 104.9 MB. Free memory is still 83.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 296.12 ms. Allocated memory is still 104.9 MB. Free memory was 66.8 MB in the beginning and 78.6 MB in the end (delta: -11.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 59.55 ms. Allocated memory is still 104.9 MB. Free memory was 78.6 MB in the beginning and 77.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 39.51 ms. Allocated memory is still 104.9 MB. Free memory was 76.9 MB in the beginning and 76.0 MB in the end (delta: 890.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 544.50 ms. Allocated memory is still 104.9 MB. Free memory was 76.0 MB in the beginning and 60.6 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1685.63 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 60.2 MB in the beginning and 84.2 MB in the end (delta: -24.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 56.19 ms. Allocated memory is still 125.8 MB. Free memory was 84.2 MB in the beginning and 82.1 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: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_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] i=0 VAL [N=1] [L31] COND TRUE i