./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8 --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 74289de26b6d11ce9d727281c5976611ee27d2e8 ............................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8 --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 74289de26b6d11ce9d727281c5976611ee27d2e8 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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-4e77c04 [2021-10-13 07:16:41,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:16:41,153 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:16:41,184 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:16:41,185 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:16:41,186 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:16:41,188 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:16:41,191 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:16:41,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:16:41,194 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:16:41,195 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:16:41,197 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:16:41,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:16:41,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:16:41,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:16:41,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:16:41,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:16:41,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:16:41,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:16:41,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:16:41,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:16:41,214 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:16:41,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:16:41,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:16:41,221 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:16:41,221 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:16:41,222 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:16:41,223 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:16:41,228 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:16:41,230 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:16:41,230 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:16:41,231 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:16:41,232 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:16:41,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:16:41,236 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:16:41,237 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:16:41,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:16:41,239 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:16:41,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:16:41,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:16:41,241 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:16:41,242 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:16:41,286 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:16:41,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:16:41,292 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:16:41,292 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:16:41,292 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:16:41,293 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:16:41,293 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:16:41,293 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:16:41,299 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:16:41,300 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:16:41,301 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:16:41,301 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:16:41,302 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:16:41,302 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:16:41,302 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:16:41,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:16:41,303 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:16:41,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:16:41,303 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:16:41,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:16:41,304 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:16:41,304 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:16:41,304 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:16:41,304 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:16:41,305 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:16:41,305 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:16:41,305 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:16:41,305 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:16:41,306 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:16:41,308 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:16:41,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:16:41,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:16:41,309 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:16:41,309 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:16:41,309 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:16:41,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:16:41,309 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:16:41,310 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:16:41,310 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:16:41,310 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_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74289de26b6d11ce9d727281c5976611ee27d2e8 [2021-10-13 07:16:41,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:16:41,602 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:16:41,604 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:16:41,606 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:16:41,607 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:16:41,608 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c [2021-10-13 07:16:41,684 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/data/5b675f9a2/88a7dd8e4cb947d2841ed1fd0f3da919/FLAGad59cd918 [2021-10-13 07:16:42,206 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:16:42,206 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c [2021-10-13 07:16:42,216 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/data/5b675f9a2/88a7dd8e4cb947d2841ed1fd0f3da919/FLAGad59cd918 [2021-10-13 07:16:42,528 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/data/5b675f9a2/88a7dd8e4cb947d2841ed1fd0f3da919 [2021-10-13 07:16:42,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:16:42,532 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:16:42,535 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:16:42,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:16:42,539 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:16:42,540 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:16:42" (1/1) ... [2021-10-13 07:16:42,542 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18134d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:42, skipping insertion in model container [2021-10-13 07:16:42,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:16:42" (1/1) ... [2021-10-13 07:16:42,550 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:16:42,577 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:16:42,744 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_5d2aae97-0dc1-4af5-af33-beea41844ce2/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c[619,632] [2021-10-13 07:16:42,763 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-13 07:16:42,779 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:16:42,793 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-10-13 07:16:42,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@ff3b3f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:42, skipping insertion in model container [2021-10-13 07:16:42,794 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:16:42,794 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-10-13 07:16:42,797 INFO L168 Benchmark]: Toolchain (without parser) took 263.35 ms. Allocated memory is still 107.0 MB. Free memory was 65.1 MB in the beginning and 81.6 MB in the end (delta: -16.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:42,797 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 107.0 MB. Free memory is still 81.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:16:42,798 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.36 ms. Allocated memory is still 107.0 MB. Free memory was 64.9 MB in the beginning and 81.6 MB in the end (delta: -16.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:42,800 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 107.0 MB. Free memory is still 81.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 259.36 ms. Allocated memory is still 107.0 MB. Free memory was 64.9 MB in the beginning and 81.6 MB in the end (delta: -16.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 28]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:16:44,973 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:16:44,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:16:45,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:16:45,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:16:45,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:16:45,020 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:16:45,028 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:16:45,030 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:16:45,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:16:45,033 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:16:45,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:16:45,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:16:45,036 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:16:45,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:16:45,041 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:16:45,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:16:45,051 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:16:45,060 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:16:45,063 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:16:45,064 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:16:45,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:16:45,075 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:16:45,077 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:16:45,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:16:45,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:16:45,084 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:16:45,085 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:16:45,086 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:16:45,087 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:16:45,087 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:16:45,088 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:16:45,089 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:16:45,090 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:16:45,093 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:16:45,094 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:16:45,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:16:45,096 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:16:45,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:16:45,098 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:16:45,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:16:45,099 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:16:45,145 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:16:45,145 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:16:45,147 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:16:45,147 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:16:45,147 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:16:45,147 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:16:45,148 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:16:45,148 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:16:45,149 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:16:45,150 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:16:45,152 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:16:45,152 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:16:45,152 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:16:45,152 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:16:45,152 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:16:45,153 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:16:45,153 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:16:45,153 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:16:45,153 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:16:45,154 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:16:45,154 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:16:45,154 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:16:45,154 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:16:45,154 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:16:45,155 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:16:45,155 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:16:45,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:16:45,155 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:16:45,155 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:16:45,156 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:16:45,156 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:16:45,156 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:16:45,156 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:16:45,156 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:16:45,157 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:16:45,157 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74289de26b6d11ce9d727281c5976611ee27d2e8 [2021-10-13 07:16:45,548 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:16:45,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:16:45,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:16:45,591 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:16:45,591 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:16:45,592 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c [2021-10-13 07:16:45,672 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/data/4af174cba/63914da2fc864e1bb4c0ba546fd5c8e3/FLAG6cfa92458 [2021-10-13 07:16:46,274 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:16:46,275 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c [2021-10-13 07:16:46,284 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/data/4af174cba/63914da2fc864e1bb4c0ba546fd5c8e3/FLAG6cfa92458 [2021-10-13 07:16:46,621 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/data/4af174cba/63914da2fc864e1bb4c0ba546fd5c8e3 [2021-10-13 07:16:46,623 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:16:46,625 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:16:46,626 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:16:46,626 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:16:46,642 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:16:46,643 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:16:46" (1/1) ... [2021-10-13 07:16:46,644 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@473b8c6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:46, skipping insertion in model container [2021-10-13 07:16:46,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:16:46" (1/1) ... [2021-10-13 07:16:46,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:16:46,680 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:16:46,807 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_5d2aae97-0dc1-4af5-af33-beea41844ce2/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c[619,632] [2021-10-13 07:16:46,826 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-13 07:16:46,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:16:46,900 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-13 07:16:46,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:16:46,911 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_5d2aae97-0dc1-4af5-af33-beea41844ce2/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c[619,632] [2021-10-13 07:16:46,919 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-13 07:16:46,930 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:16:46,938 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:16:46,959 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_5d2aae97-0dc1-4af5-af33-beea41844ce2/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c[619,632] [2021-10-13 07:16:46,964 WARN L1507 CHandler]: Possible shadowing of function min [2021-10-13 07:16:46,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:16:46,992 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:16:46,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:46 WrapperNode [2021-10-13 07:16:46,993 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:16:46,994 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:16:46,994 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:16:46,994 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:16:47,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:46" (1/1) ... [2021-10-13 07:16:47,013 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:46" (1/1) ... [2021-10-13 07:16:47,040 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:16:47,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:16:47,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:16:47,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:16:47,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:46" (1/1) ... [2021-10-13 07:16:47,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:46" (1/1) ... [2021-10-13 07:16:47,056 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:46" (1/1) ... [2021-10-13 07:16:47,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:46" (1/1) ... [2021-10-13 07:16:47,070 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:46" (1/1) ... [2021-10-13 07:16:47,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:46" (1/1) ... [2021-10-13 07:16:47,078 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:46" (1/1) ... [2021-10-13 07:16:47,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:16:47,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:16:47,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:16:47,084 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:16:47,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:46" (1/1) ... [2021-10-13 07:16:47,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:16:47,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:16:47,142 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:16:47,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:16:47,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:16:47,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:16:47,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:16:47,187 INFO L130 BoogieDeclarations]: Found specification of procedure min [2021-10-13 07:16:47,187 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2021-10-13 07:16:47,187 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 07:16:47,188 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:16:47,188 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-10-13 07:16:47,188 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-10-13 07:16:47,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:16:47,188 INFO L130 BoogieDeclarations]: Found specification of procedure size [2021-10-13 07:16:47,188 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2021-10-13 07:16:47,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:16:47,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:16:47,189 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2021-10-13 07:16:47,189 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2021-10-13 07:16:47,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:16:47,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 07:16:47,822 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:16:47,824 INFO L299 CfgBuilder]: Removed 24 assume(true) statements. [2021-10-13 07:16:47,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:16:47 BoogieIcfgContainer [2021-10-13 07:16:47,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:16:47,831 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:16:47,832 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:16:47,834 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:16:47,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:16:46" (1/3) ... [2021-10-13 07:16:47,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cc48ab0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:16:47, skipping insertion in model container [2021-10-13 07:16:47,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:46" (2/3) ... [2021-10-13 07:16:47,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cc48ab0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:16:47, skipping insertion in model container [2021-10-13 07:16:47,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:16:47" (3/3) ... [2021-10-13 07:16:47,840 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_iter_incorrect.c [2021-10-13 07:16:47,846 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:16:47,846 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-10-13 07:16:47,907 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:16:47,920 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, mConcurrency=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 [2021-10-13 07:16:47,921 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-13 07:16:47,955 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 59 states have internal predecessors, (74), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-10-13 07:16:47,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 07:16:47,965 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:47,966 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:16:47,967 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-13 07:16:47,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:47,972 INFO L82 PathProgramCache]: Analyzing trace with hash 400471207, now seen corresponding path program 1 times [2021-10-13 07:16:47,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:16:47,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2140487748] [2021-10-13 07:16:47,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:47,990 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:16:47,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:16:47,998 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:16:48,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:16:48,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:48,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 07:16:48,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:48,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:48,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:48,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:48,432 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:16:48,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2140487748] [2021-10-13 07:16:48,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2140487748] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:16:48,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:16:48,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:16:48,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407177515] [2021-10-13 07:16:48,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:16:48,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:16:48,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:16:48,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:16:48,460 INFO L87 Difference]: Start difference. First operand has 78 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 59 states have internal predecessors, (74), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-13 07:16:48,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:16:48,500 INFO L93 Difference]: Finished difference Result 131 states and 170 transitions. [2021-10-13 07:16:48,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:16:48,502 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 30 [2021-10-13 07:16:48,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:16:48,515 INFO L225 Difference]: With dead ends: 131 [2021-10-13 07:16:48,515 INFO L226 Difference]: Without dead ends: 73 [2021-10-13 07:16:48,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:16:48,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-13 07:16:48,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-10-13 07:16:48,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 54 states have internal predecessors, (62), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-10-13 07:16:48,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2021-10-13 07:16:48,590 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 30 [2021-10-13 07:16:48,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:16:48,592 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2021-10-13 07:16:48,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-13 07:16:48,594 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2021-10-13 07:16:48,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 07:16:48,598 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:48,599 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:16:48,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:16:48,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:16:48,813 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-13 07:16:48,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:48,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1101535785, now seen corresponding path program 1 times [2021-10-13 07:16:48,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:16:48,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [587083170] [2021-10-13 07:16:48,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:48,822 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:16:48,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:16:48,823 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:16:48,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:16:48,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:48,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:16:48,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:49,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:49,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:49,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:49,249 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:16:49,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [587083170] [2021-10-13 07:16:49,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [587083170] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:16:49,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:16:49,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-13 07:16:49,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243280792] [2021-10-13 07:16:49,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:16:49,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:16:49,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:16:49,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:16:49,259 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-13 07:16:49,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:16:49,315 INFO L93 Difference]: Finished difference Result 125 states and 154 transitions. [2021-10-13 07:16:49,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:16:49,316 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 30 [2021-10-13 07:16:49,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:16:49,320 INFO L225 Difference]: With dead ends: 125 [2021-10-13 07:16:49,320 INFO L226 Difference]: Without dead ends: 75 [2021-10-13 07:16:49,321 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:16:49,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-13 07:16:49,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-10-13 07:16:49,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 56 states have internal predecessors, (63), 14 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (17), 14 states have call predecessors, (17), 14 states have call successors, (17) [2021-10-13 07:16:49,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2021-10-13 07:16:49,333 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 30 [2021-10-13 07:16:49,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:16:49,333 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2021-10-13 07:16:49,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-13 07:16:49,334 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2021-10-13 07:16:49,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-13 07:16:49,336 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:49,336 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:16:49,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:16:49,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:16:49,548 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-13 07:16:49,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:49,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1481862926, now seen corresponding path program 1 times [2021-10-13 07:16:49,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:16:49,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [631869926] [2021-10-13 07:16:49,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:49,549 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:16:49,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:16:49,550 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:16:49,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:16:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:49,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:16:49,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:49,985 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 07:16:49,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:50,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 07:16:50,315 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:16:50,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [631869926] [2021-10-13 07:16:50,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [631869926] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:16:50,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1193465776] [2021-10-13 07:16:50,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:50,316 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:16:50,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:16:50,320 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:16:50,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-13 07:16:50,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:50,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:16:50,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:50,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 07:16:50,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:51,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 07:16:51,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1193465776] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:16:51,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542673923] [2021-10-13 07:16:51,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:51,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:16:51,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:16:51,088 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:16:51,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 07:16:51,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:51,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:16:51,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:51,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 07:16:51,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:51,744 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 07:16:51,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542673923] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:16:51,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:16:51,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 8 [2021-10-13 07:16:51,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740897897] [2021-10-13 07:16:51,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:16:51,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:16:51,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:16:51,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:16:51,756 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-13 07:16:51,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:16:51,928 INFO L93 Difference]: Finished difference Result 133 states and 167 transitions. [2021-10-13 07:16:51,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:16:51,929 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 42 [2021-10-13 07:16:51,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:16:51,931 INFO L225 Difference]: With dead ends: 133 [2021-10-13 07:16:51,931 INFO L226 Difference]: Without dead ends: 77 [2021-10-13 07:16:51,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:16:51,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-10-13 07:16:51,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-10-13 07:16:51,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 58 states have internal predecessors, (64), 14 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (19), 14 states have call predecessors, (19), 14 states have call successors, (19) [2021-10-13 07:16:51,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2021-10-13 07:16:51,952 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 42 [2021-10-13 07:16:51,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:16:51,953 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2021-10-13 07:16:51,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-13 07:16:51,954 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2021-10-13 07:16:51,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-13 07:16:51,961 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:51,962 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:16:52,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:16:52,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:16:52,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:16:52,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:16:52,588 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-13 07:16:52,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:52,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1950591435, now seen corresponding path program 1 times [2021-10-13 07:16:52,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:16:52,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093806346] [2021-10-13 07:16:52,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:52,589 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:16:52,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:16:52,590 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:16:52,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 07:16:52,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:52,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:16:52,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-13 07:16:53,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:53,257 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-13 07:16:53,258 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:16:53,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093806346] [2021-10-13 07:16:53,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093806346] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:16:53,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:16:53,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 9 [2021-10-13 07:16:53,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6313294] [2021-10-13 07:16:53,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 07:16:53,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:16:53,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 07:16:53,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:16:53,260 INFO L87 Difference]: Start difference. First operand 77 states and 97 transitions. Second operand has 9 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-10-13 07:16:53,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:16:53,407 INFO L93 Difference]: Finished difference Result 133 states and 167 transitions. [2021-10-13 07:16:53,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 07:16:53,408 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 52 [2021-10-13 07:16:53,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:16:53,410 INFO L225 Difference]: With dead ends: 133 [2021-10-13 07:16:53,410 INFO L226 Difference]: Without dead ends: 79 [2021-10-13 07:16:53,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:16:53,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-13 07:16:53,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-10-13 07:16:53,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 60 states have internal predecessors, (65), 14 states have call successors, (14), 4 states have call predecessors, (14), 7 states have return successors, (21), 14 states have call predecessors, (21), 14 states have call successors, (21) [2021-10-13 07:16:53,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2021-10-13 07:16:53,423 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 52 [2021-10-13 07:16:53,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:16:53,423 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2021-10-13 07:16:53,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-10-13 07:16:53,424 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2021-10-13 07:16:53,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-10-13 07:16:53,425 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:53,425 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:16:53,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:16:53,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:16:53,638 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-13 07:16:53,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:53,638 INFO L82 PathProgramCache]: Analyzing trace with hash 989968802, now seen corresponding path program 1 times [2021-10-13 07:16:53,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:16:53,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [878607684] [2021-10-13 07:16:53,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:53,640 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:16:53,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:16:53,641 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:16:53,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 07:16:53,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:53,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:16:53,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:54,182 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-13 07:16:54,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:54,463 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-13 07:16:54,464 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:16:54,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [878607684] [2021-10-13 07:16:54,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [878607684] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:16:54,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:16:54,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 9 [2021-10-13 07:16:54,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89076779] [2021-10-13 07:16:54,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 07:16:54,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:16:54,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 07:16:54,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:16:54,466 INFO L87 Difference]: Start difference. First operand 79 states and 100 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-10-13 07:16:54,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:16:54,708 INFO L93 Difference]: Finished difference Result 128 states and 162 transitions. [2021-10-13 07:16:54,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 07:16:54,709 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 65 [2021-10-13 07:16:54,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:16:54,712 INFO L225 Difference]: With dead ends: 128 [2021-10-13 07:16:54,712 INFO L226 Difference]: Without dead ends: 81 [2021-10-13 07:16:54,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:16:54,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-13 07:16:54,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-10-13 07:16:54,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 55 states have (on average 1.2) internal successors, (66), 62 states have internal predecessors, (66), 14 states have call successors, (14), 4 states have call predecessors, (14), 8 states have return successors, (24), 14 states have call predecessors, (24), 14 states have call successors, (24) [2021-10-13 07:16:54,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2021-10-13 07:16:54,733 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 65 [2021-10-13 07:16:54,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:16:54,734 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2021-10-13 07:16:54,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-10-13 07:16:54,735 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2021-10-13 07:16:54,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-13 07:16:54,736 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:54,736 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:16:54,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:16:54,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:16:54,952 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-13 07:16:54,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:54,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1197061387, now seen corresponding path program 1 times [2021-10-13 07:16:54,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:16:54,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [453433628] [2021-10-13 07:16:54,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:54,954 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:16:54,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:16:54,955 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:16:54,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 07:16:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:16:55,393 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:16:55,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:16:55,746 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 07:16:55,747 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:16:55,748 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:16:55,749 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:16:55,750 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:16:55,750 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:16:55,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:16:55,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:16:55,971 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:16:55,994 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-13 07:16:55,995 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-13 07:16:55,996 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-13 07:16:55,996 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-13 07:16:56,001 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-13 07:16:56,001 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-13 07:16:56,002 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-13 07:16:56,002 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-13 07:16:56,002 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-13 07:16:56,003 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-13 07:16:56,003 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-13 07:16:56,003 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-13 07:16:56,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:16:56 BoogieIcfgContainer [2021-10-13 07:16:56,046 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:16:56,047 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:16:56,047 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:16:56,047 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:16:56,048 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:16:47" (3/4) ... [2021-10-13 07:16:56,051 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 07:16:56,057 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-13 07:16:56,060 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-13 07:16:56,061 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-13 07:16:56,061 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-13 07:16:56,062 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-13 07:16:56,065 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-13 07:16:56,065 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-13 07:16:56,065 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-13 07:16:56,065 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-13 07:16:56,066 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-13 07:16:56,066 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-13 07:16:56,066 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2021-10-13 07:16:56,144 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:16:56,144 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:16:56,146 INFO L168 Benchmark]: Toolchain (without parser) took 9520.16 ms. Allocated memory was 69.2 MB in the beginning and 96.5 MB in the end (delta: 27.3 MB). Free memory was 48.0 MB in the beginning and 39.2 MB in the end (delta: 8.8 MB). Peak memory consumption was 36.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:56,146 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 69.2 MB. Free memory is still 50.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:16:56,147 INFO L168 Benchmark]: CACSL2BoogieTranslator took 367.41 ms. Allocated memory is still 69.2 MB. Free memory was 47.9 MB in the beginning and 47.3 MB in the end (delta: 590.3 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:56,147 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.02 ms. Allocated memory is still 69.2 MB. Free memory was 47.3 MB in the beginning and 45.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:56,147 INFO L168 Benchmark]: Boogie Preprocessor took 42.08 ms. Allocated memory is still 69.2 MB. Free memory was 45.3 MB in the beginning and 43.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:56,148 INFO L168 Benchmark]: RCFGBuilder took 743.82 ms. Allocated memory is still 69.2 MB. Free memory was 43.0 MB in the beginning and 43.5 MB in the end (delta: -509.8 kB). Peak memory consumption was 19.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:56,148 INFO L168 Benchmark]: TraceAbstraction took 8215.08 ms. Allocated memory was 69.2 MB in the beginning and 96.5 MB in the end (delta: 27.3 MB). Free memory was 43.2 MB in the beginning and 45.5 MB in the end (delta: -2.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:56,149 INFO L168 Benchmark]: Witness Printer took 97.49 ms. Allocated memory is still 96.5 MB. Free memory was 45.5 MB in the beginning and 39.2 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:56,151 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 69.2 MB. Free memory is still 50.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 367.41 ms. Allocated memory is still 69.2 MB. Free memory was 47.9 MB in the beginning and 47.3 MB in the end (delta: 590.3 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.02 ms. Allocated memory is still 69.2 MB. Free memory was 47.3 MB in the beginning and 45.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.08 ms. Allocated memory is still 69.2 MB. Free memory was 45.3 MB in the beginning and 43.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 743.82 ms. Allocated memory is still 69.2 MB. Free memory was 43.0 MB in the beginning and 43.5 MB in the end (delta: -509.8 kB). Peak memory consumption was 19.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8215.08 ms. Allocated memory was 69.2 MB in the beginning and 96.5 MB in the end (delta: 27.3 MB). Free memory was 43.2 MB in the beginning and 45.5 MB in the end (delta: -2.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 16.1 GB. * Witness Printer took 97.49 ms. Allocated memory is still 96.5 MB. Free memory was 45.5 MB in the beginning and 39.2 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled * 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: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L105] CALL nondet_tree() [L25] COND FALSE !(__VERIFIER_nondet_bool()) [L28] struct node *n = (struct node *)malloc(sizeof(struct node)); [L29] n->data = __VERIFIER_nondet_int() [L30] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; VAL [\result={0:0}] [L30] RET, EXPR nondet_tree() VAL [n={1:0}, nondet_tree()={0:0}] [L30] n->left = nondet_tree() [L31] CALL, EXPR nondet_tree() [L25] COND TRUE __VERIFIER_nondet_bool() [L26] return 0; VAL [\result={0:0}] [L31] RET, EXPR nondet_tree() VAL [n={1:0}, nondet_tree()={0:0}] [L31] n->right = nondet_tree() [L32] return n; VAL [\result={1:0}, n={1:0}] [L105] RET nondet_tree() [L83] CALL, EXPR min(t) VAL [n={1:0}] [L37] COND FALSE !(!n) [L40] EXPR n->left VAL [n={1:0}, n={1:0}, n->left={0:0}] [L40] CALL, EXPR min(n->left) VAL [n={0:0}] [L37] COND TRUE !n [L38] return 2147483647; VAL [\result=2147483647, n={0:0}, n={0:0}] [L40] RET, EXPR min(n->left) VAL [min(n->left)=2147483647, n={1:0}, n={1:0}, n->left={0:0}] [L40] int a = min(n->left); [L41] EXPR n->right VAL [a=2147483647, n={1:0}, n={1:0}, n->right={0:0}] [L41] CALL, EXPR min(n->right) VAL [n={0:0}] [L37] COND TRUE !n [L38] return 2147483647; VAL [\result=2147483647, n={0:0}, n={0:0}] [L41] RET, EXPR min(n->right) VAL [a=2147483647, min(n->right)=2147483647, n={1:0}, n={1:0}, n->right={0:0}] [L41] int b = min(n->right); [L42] COND TRUE a <= b [L42] return a; VAL [\result=2147483647, a=2147483647, b=2147483647, n={1:0}, n={1:0}] [L83] RET, EXPR min(t) [L83] int a = min(t); [L84] int b; [L86] CALL, EXPR size(t) VAL [t={1:0}] [L78] COND FALSE !(!t) [L79] EXPR t->left VAL [t={1:0}, t={1:0}, t->left={0:0}] [L79] CALL, EXPR size(t->left) VAL [t={0:0}] [L78] COND TRUE !t [L78] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L79] RET, EXPR size(t->left) VAL [size(t->left)=0, t={1:0}, t={1:0}, t->left={0:0}] [L79] EXPR t->right VAL [size(t->left)=0, t={1:0}, t={1:0}, t->left={0:0}, t->right={0:0}] [L79] CALL, EXPR size(t->right) VAL [t={0:0}] [L78] COND TRUE !t [L78] return 0; VAL [\result=0, t={0:0}, t={0:0}] [L79] RET, EXPR size(t->right) VAL [size(t->left)=0, size(t->right)=0, t={1:0}, t={1:0}, t->left={0:0}, t->right={0:0}] [L79] return size(t->left) + size(t->right) + 1; [L86] RET, EXPR size(t) [L86] int n = size(t); [L10] COND FALSE !(!cond) [L88] int *x = calloc(n, sizeof(int)); [L89] CALL tree_inorder(t, x, n) VAL [\old(i)=1, a={2:0}, t={1:0}] [L67] COND FALSE !(!t) [L70] EXPR t->left VAL [\old(i)=1, a={2:0}, a={2:0}, i=1, t={1:0}, t={1:0}, t->left={0:0}] [L70] CALL, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={2:0}, t={0:0}] [L67] COND TRUE !t [L68] return i; VAL [\old(i)=1, \result=1, a={2:0}, a={2:0}, i=1, t={0:0}, t={0:0}] [L70] RET, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={2:0}, a={2:0}, i=1, t={1:0}, t={1:0}, t->left={0:0}, tree_inorder(t->left, a, i)=1] [L70] i = tree_inorder(t->left, a, i) [L71] EXPR i++ [L71] EXPR t->data [L71] a[i++] = t->data [L72] EXPR t->right VAL [\old(i)=1, a={2:0}, a={2:0}, i=2, t={1:0}, t={1:0}, t->right={0:0}] [L72] CALL, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=2, a={2:0}, t={0:0}] [L67] COND TRUE !t [L68] return i; VAL [\old(i)=2, \result=2, a={2:0}, a={2:0}, i=2, t={0:0}, t={0:0}] [L72] RET, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=1, a={2:0}, a={2:0}, i=2, t={1:0}, t={1:0}, t->right={0:0}, tree_inorder(t->right, a, i)=2] [L72] i = tree_inorder(t->right, a, i) [L73] return i; VAL [\old(i)=1, \result=2, a={2:0}, a={2:0}, i=2, t={1:0}, t={1:0}] [L89] RET tree_inorder(t, x, n) [L90] x[0] [L16] COND TRUE !cond [L16] reach_error() - UnprovableResult [Line: 16]: 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: 16]: 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: 16]: 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 5 procedures, 78 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 8064.7ms, OverallIterations: 6, TraceHistogramMax: 3, EmptinessCheckTime: 34.3ms, AutomataDifference: 720.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 27.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 433 SDtfs, 171 SDslu, 1364 SDs, 0 SdLazy, 223 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 340.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 603 GetRequests, 572 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 272.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=5, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 118.9ms AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 169.4ms SsaConstructionTime, 629.3ms SatisfiabilityAnalysisTime, 3143.7ms InterpolantComputationTime, 380 NumberOfCodeBlocks, 380 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 592 ConstructedInterpolants, 0 QuantifiedInterpolants, 1347 SizeOfPredicates, 28 NumberOfNonLiveVariables, 1063 ConjunctsInSsa, 62 ConjunctsInUnsatCore, 14 InterpolantComputations, 8 PerfectInterpolantSequences, 168/180 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! [2021-10-13 07:16:56,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2aae97-0dc1-4af5-af33-beea41844ce2/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...