./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/dll-circular-1.i --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_c299762b-48ec-4cf3-8ef8-76fa8d77be98/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c299762b-48ec-4cf3-8ef8-76fa8d77be98/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c299762b-48ec-4cf3-8ef8-76fa8d77be98/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c299762b-48ec-4cf3-8ef8-76fa8d77be98/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-circular-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c299762b-48ec-4cf3-8ef8-76fa8d77be98/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c299762b-48ec-4cf3-8ef8-76fa8d77be98/bin/utaipan-9zjyvhn0QE --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 4b74df92940ca0e86c8c02c3eca1e89fb6c9c9c1248a25cd764acf39f7727180 ............................................................................................................................................................................................................................................................................................................................................................................................................ 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 [2021-10-24 10:24:44,097 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 10:24:44,101 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 10:24:44,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 10:24:44,156 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 10:24:44,160 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 10:24:44,163 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 10:24:44,167 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 10:24:44,170 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 10:24:44,175 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 10:24:44,176 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 10:24:44,178 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 10:24:44,178 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 10:24:44,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 10:24:44,183 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 10:24:44,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 10:24:44,187 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 10:24:44,189 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 10:24:44,195 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 10:24:44,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 10:24:44,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 10:24:44,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 10:24:44,212 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 10:24:44,213 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 10:24:44,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 10:24:44,223 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 10:24:44,223 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 10:24:44,225 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 10:24:44,226 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 10:24:44,228 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 10:24:44,228 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 10:24:44,229 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 10:24:44,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 10:24:44,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 10:24:44,234 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 10:24:44,235 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 10:24:44,235 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 10:24:44,236 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 10:24:44,236 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 10:24:44,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 10:24:44,238 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 10:24:44,239 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c299762b-48ec-4cf3-8ef8-76fa8d77be98/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 10:24:44,289 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 10:24:44,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 10:24:44,291 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 10:24:44,291 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 10:24:44,292 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 10:24:44,292 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 10:24:44,292 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 10:24:44,292 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 10:24:44,299 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 10:24:44,299 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 10:24:44,301 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 10:24:44,301 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 10:24:44,301 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 10:24:44,302 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 10:24:44,302 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 10:24:44,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 10:24:44,303 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 10:24:44,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 10:24:44,303 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 10:24:44,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 10:24:44,304 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 10:24:44,304 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 10:24:44,304 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 10:24:44,305 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 10:24:44,305 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 10:24:44,305 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 10:24:44,305 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 10:24:44,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 10:24:44,306 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 10:24:44,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 10:24:44,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:24:44,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 10:24:44,309 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 10:24:44,309 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 10:24:44,309 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 10:24:44,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 10:24:44,310 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 10:24:44,310 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 10:24:44,310 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 10:24:44,310 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_c299762b-48ec-4cf3-8ef8-76fa8d77be98/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c299762b-48ec-4cf3-8ef8-76fa8d77be98/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b74df92940ca0e86c8c02c3eca1e89fb6c9c9c1248a25cd764acf39f7727180 [2021-10-24 10:24:44,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 10:24:44,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 10:24:44,656 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 10:24:44,657 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 10:24:44,658 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 10:24:44,659 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c299762b-48ec-4cf3-8ef8-76fa8d77be98/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/forester-heap/dll-circular-1.i [2021-10-24 10:24:44,731 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c299762b-48ec-4cf3-8ef8-76fa8d77be98/bin/utaipan-9zjyvhn0QE/data/1731ce3b3/cea1d34f3c4e4693a727faa4bbde4802/FLAGf21c6a872 [2021-10-24 10:24:45,326 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 10:24:45,327 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c299762b-48ec-4cf3-8ef8-76fa8d77be98/sv-benchmarks/c/forester-heap/dll-circular-1.i [2021-10-24 10:24:45,356 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c299762b-48ec-4cf3-8ef8-76fa8d77be98/bin/utaipan-9zjyvhn0QE/data/1731ce3b3/cea1d34f3c4e4693a727faa4bbde4802/FLAGf21c6a872 [2021-10-24 10:24:45,590 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c299762b-48ec-4cf3-8ef8-76fa8d77be98/bin/utaipan-9zjyvhn0QE/data/1731ce3b3/cea1d34f3c4e4693a727faa4bbde4802 [2021-10-24 10:24:45,598 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 10:24:45,600 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 10:24:45,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 10:24:45,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 10:24:45,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 10:24:45,609 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:24:45" (1/1) ... [2021-10-24 10:24:45,611 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ec0cbb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:24:45, skipping insertion in model container [2021-10-24 10:24:45,611 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:24:45" (1/1) ... [2021-10-24 10:24:45,618 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 10:24:45,664 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:24:45,972 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_c299762b-48ec-4cf3-8ef8-76fa8d77be98/sv-benchmarks/c/forester-heap/dll-circular-1.i[22365,22378] [2021-10-24 10:24:45,979 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_c299762b-48ec-4cf3-8ef8-76fa8d77be98/sv-benchmarks/c/forester-heap/dll-circular-1.i[22471,22484] [2021-10-24 10:24:45,981 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_c299762b-48ec-4cf3-8ef8-76fa8d77be98/sv-benchmarks/c/forester-heap/dll-circular-1.i[22595,22608] [2021-10-24 10:24:45,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:24:45,994 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 10:24:46,063 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_c299762b-48ec-4cf3-8ef8-76fa8d77be98/sv-benchmarks/c/forester-heap/dll-circular-1.i[22365,22378] [2021-10-24 10:24:46,065 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_c299762b-48ec-4cf3-8ef8-76fa8d77be98/sv-benchmarks/c/forester-heap/dll-circular-1.i[22471,22484] [2021-10-24 10:24:46,066 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_c299762b-48ec-4cf3-8ef8-76fa8d77be98/sv-benchmarks/c/forester-heap/dll-circular-1.i[22595,22608] [2021-10-24 10:24:46,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:24:46,106 INFO L208 MainTranslator]: Completed translation [2021-10-24 10:24:46,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:24:46 WrapperNode [2021-10-24 10:24:46,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 10:24:46,109 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 10:24:46,109 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 10:24:46,109 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 10:24:46,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:24:46" (1/1) ... [2021-10-24 10:24:46,137 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:24:46" (1/1) ... [2021-10-24 10:24:46,161 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 10:24:46,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 10:24:46,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 10:24:46,162 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 10:24:46,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:24:46" (1/1) ... [2021-10-24 10:24:46,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:24:46" (1/1) ... [2021-10-24 10:24:46,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:24:46" (1/1) ... [2021-10-24 10:24:46,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:24:46" (1/1) ... [2021-10-24 10:24:46,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:24:46" (1/1) ... [2021-10-24 10:24:46,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:24:46" (1/1) ... [2021-10-24 10:24:46,196 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:24:46" (1/1) ... [2021-10-24 10:24:46,199 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 10:24:46,200 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 10:24:46,200 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 10:24:46,208 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 10:24:46,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:24:46" (1/1) ... [2021-10-24 10:24:46,219 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:24:46,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c299762b-48ec-4cf3-8ef8-76fa8d77be98/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:24:46,242 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c299762b-48ec-4cf3-8ef8-76fa8d77be98/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 10:24:46,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c299762b-48ec-4cf3-8ef8-76fa8d77be98/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 10:24:46,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-24 10:24:46,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-24 10:24:46,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-24 10:24:46,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-24 10:24:46,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 10:24:46,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-24 10:24:46,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-24 10:24:46,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-24 10:24:46,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 10:24:46,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 10:24:46,645 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 10:24:46,646 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-24 10:24:46,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:24:46 BoogieIcfgContainer [2021-10-24 10:24:46,649 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 10:24:46,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 10:24:46,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 10:24:46,654 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 10:24:46,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 10:24:45" (1/3) ... [2021-10-24 10:24:46,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17b97561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:24:46, skipping insertion in model container [2021-10-24 10:24:46,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:24:46" (2/3) ... [2021-10-24 10:24:46,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17b97561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:24:46, skipping insertion in model container [2021-10-24 10:24:46,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:24:46" (3/3) ... [2021-10-24 10:24:46,657 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-circular-1.i [2021-10-24 10:24:46,663 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 10:24:46,663 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-24 10:24:46,731 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 10:24:46,750 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 [2021-10-24 10:24:46,750 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-24 10:24:46,766 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 25 states have (on average 1.84) internal successors, (46), 28 states have internal predecessors, (46), 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) [2021-10-24 10:24:46,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-24 10:24:46,771 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:24:46,771 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-24 10:24:46,772 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:24:46,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:24:46,778 INFO L82 PathProgramCache]: Analyzing trace with hash 148381218, now seen corresponding path program 1 times [2021-10-24 10:24:46,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:24:46,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095932091] [2021-10-24 10:24:46,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:24:46,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:24:46,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:24:46,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:24:46,976 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:24:46,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095932091] [2021-10-24 10:24:46,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095932091] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:24:46,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:24:46,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 10:24:46,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072464195] [2021-10-24 10:24:46,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-24 10:24:46,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:24:47,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-24 10:24:47,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 10:24:47,015 INFO L87 Difference]: Start difference. First operand has 29 states, 25 states have (on average 1.84) internal successors, (46), 28 states have internal predecessors, (46), 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 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-10-24 10:24:47,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:24:47,038 INFO L93 Difference]: Finished difference Result 57 states and 91 transitions. [2021-10-24 10:24:47,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-24 10:24:47,040 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2021-10-24 10:24:47,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:24:47,048 INFO L225 Difference]: With dead ends: 57 [2021-10-24 10:24:47,049 INFO L226 Difference]: Without dead ends: 24 [2021-10-24 10:24:47,051 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 10:24:47,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-24 10:24:47,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-24 10:24:47,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 23 states have internal predecessors, (28), 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) [2021-10-24 10:24:47,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-10-24 10:24:47,078 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 5 [2021-10-24 10:24:47,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:24:47,079 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-10-24 10:24:47,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-10-24 10:24:47,079 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-10-24 10:24:47,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-24 10:24:47,080 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:24:47,080 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-24 10:24:47,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-24 10:24:47,081 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:24:47,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:24:47,082 INFO L82 PathProgramCache]: Analyzing trace with hash 263882099, now seen corresponding path program 1 times [2021-10-24 10:24:47,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:24:47,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197328522] [2021-10-24 10:24:47,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:24:47,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:24:47,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:24:47,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:24:47,316 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:24:47,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197328522] [2021-10-24 10:24:47,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197328522] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:24:47,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:24:47,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 10:24:47,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807429726] [2021-10-24 10:24:47,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:24:47,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:24:47,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:24:47,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:24:47,320 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-10-24 10:24:47,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:24:47,411 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-10-24 10:24:47,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:24:47,412 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2021-10-24 10:24:47,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:24:47,415 INFO L225 Difference]: With dead ends: 39 [2021-10-24 10:24:47,415 INFO L226 Difference]: Without dead ends: 35 [2021-10-24 10:24:47,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:24:47,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-24 10:24:47,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2021-10-24 10:24:47,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 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) [2021-10-24 10:24:47,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-10-24 10:24:47,428 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 6 [2021-10-24 10:24:47,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:24:47,430 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-10-24 10:24:47,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-10-24 10:24:47,433 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-10-24 10:24:47,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-24 10:24:47,434 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:24:47,434 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:24:47,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-24 10:24:47,437 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:24:47,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:24:47,439 INFO L82 PathProgramCache]: Analyzing trace with hash -2093833755, now seen corresponding path program 1 times [2021-10-24 10:24:47,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:24:47,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401509103] [2021-10-24 10:24:47,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:24:47,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:24:47,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:24:47,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:24:47,512 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:24:47,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401509103] [2021-10-24 10:24:47,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401509103] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:24:47,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:24:47,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 10:24:47,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78857165] [2021-10-24 10:24:47,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:24:47,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:24:47,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:24:47,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:24:47,515 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2021-10-24 10:24:47,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:24:47,535 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2021-10-24 10:24:47,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:24:47,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2021-10-24 10:24:47,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:24:47,538 INFO L225 Difference]: With dead ends: 67 [2021-10-24 10:24:47,538 INFO L226 Difference]: Without dead ends: 46 [2021-10-24 10:24:47,539 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:24:47,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-24 10:24:47,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 33. [2021-10-24 10:24:47,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 32 states have internal predecessors, (40), 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) [2021-10-24 10:24:47,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-10-24 10:24:47,546 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 9 [2021-10-24 10:24:47,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:24:47,546 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-10-24 10:24:47,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2021-10-24 10:24:47,547 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-10-24 10:24:47,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-24 10:24:47,548 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:24:47,548 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:24:47,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-24 10:24:47,548 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:24:47,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:24:47,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1360097193, now seen corresponding path program 1 times [2021-10-24 10:24:47,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:24:47,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133730693] [2021-10-24 10:24:47,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:24:47,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:24:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 10:24:47,583 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-24 10:24:47,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 10:24:47,654 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-24 10:24:47,655 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-24 10:24:47,656 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 10:24:47,658 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 10:24:47,659 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 10:24:47,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-24 10:24:47,666 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 10:24:47,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 10:24:47 BoogieIcfgContainer [2021-10-24 10:24:47,688 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 10:24:47,688 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 10:24:47,689 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 10:24:47,689 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 10:24:47,689 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:24:46" (3/4) ... [2021-10-24 10:24:47,692 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-24 10:24:47,728 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c299762b-48ec-4cf3-8ef8-76fa8d77be98/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 10:24:47,728 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 10:24:47,730 INFO L168 Benchmark]: Toolchain (without parser) took 2129.07 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 54.5 MB in the beginning and 63.9 MB in the end (delta: -9.5 MB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. [2021-10-24 10:24:47,731 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 92.3 MB. Free memory was 62.0 MB in the beginning and 61.9 MB in the end (delta: 29.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:24:47,732 INFO L168 Benchmark]: CACSL2BoogieTranslator took 503.48 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 54.3 MB in the beginning and 82.1 MB in the end (delta: -27.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-24 10:24:47,733 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.67 ms. Allocated memory is still 113.2 MB. Free memory was 82.1 MB in the beginning and 80.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:24:47,733 INFO L168 Benchmark]: Boogie Preprocessor took 37.57 ms. Allocated memory is still 113.2 MB. Free memory was 80.0 MB in the beginning and 78.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:24:47,734 INFO L168 Benchmark]: RCFGBuilder took 448.75 ms. Allocated memory is still 113.2 MB. Free memory was 78.2 MB in the beginning and 62.1 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-24 10:24:47,734 INFO L168 Benchmark]: TraceAbstraction took 1037.47 ms. Allocated memory is still 113.2 MB. Free memory was 61.6 MB in the beginning and 65.4 MB in the end (delta: -3.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:24:47,735 INFO L168 Benchmark]: Witness Printer took 39.96 ms. Allocated memory is still 113.2 MB. Free memory was 65.4 MB in the beginning and 63.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:24:47,738 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 92.3 MB. Free memory was 62.0 MB in the beginning and 61.9 MB in the end (delta: 29.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 503.48 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 54.3 MB in the beginning and 82.1 MB in the end (delta: -27.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.67 ms. Allocated memory is still 113.2 MB. Free memory was 82.1 MB in the beginning and 80.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.57 ms. Allocated memory is still 113.2 MB. Free memory was 80.0 MB in the beginning and 78.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 448.75 ms. Allocated memory is still 113.2 MB. Free memory was 78.2 MB in the beginning and 62.1 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1037.47 ms. Allocated memory is still 113.2 MB. Free memory was 61.6 MB in the beginning and 65.4 MB in the end (delta: -3.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 39.96 ms. Allocated memory is still 113.2 MB. Free memory was 65.4 MB in the beginning and 63.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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: 1034]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L997] SLL* head = malloc(sizeof(SLL)); [L998] head->next = head [L999] head->data = 0 [L1001] SLL* x = head; [L1002] int state = 1; [L1005] COND FALSE !(__VERIFIER_nondet_int()) [L1027] x->data = state [L1029] EXPR head->next [L1029] x = head->next [L1030] COND FALSE !(!(((void*)0) != x)) [L1032] EXPR x->data [L1032] COND TRUE x->data != 0 [L1034] EXPR x->next [L1034] EXPR x->next->data [L1034] EXPR x->next->data != 0 && x->data > x->next->data [L1034] EXPR x->data [L1034] EXPR x->next [L1034] EXPR x->next->data [L1034] EXPR x->next->data != 0 && x->data > x->next->data [L1034] COND TRUE !(x->next->data != 0 && x->data > x->next->data) [L1034] reach_error() - UnprovableResult [Line: 1025]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 935.7ms, OverallIterations: 4, TraceHistogramMax: 1, EmptinessCheckTime: 10.7ms, AutomataDifference: 184.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 75 SDtfs, 40 SDslu, 42 SDs, 0 SdLazy, 32 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 60.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=3, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 33.6ms AutomataMinimizationTime, 3 MinimizatonAttempts, 22 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 16.7ms SsaConstructionTime, 112.9ms SatisfiabilityAnalysisTime, 306.0ms InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 88 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-24 10:24:47,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c299762b-48ec-4cf3-8ef8-76fa8d77be98/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...