./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c -s /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 74289de26b6d11ce9d727281c5976611ee27d2e8 ............................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c -s /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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 0.2.0-a4ecdab [2020-11-22 13:07:53,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:07:53,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:07:53,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:07:53,280 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:07:53,287 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:07:53,291 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:07:53,298 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:07:53,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:07:53,309 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:07:53,311 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:07:53,312 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:07:53,314 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:07:53,317 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:07:53,319 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:07:53,320 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:07:53,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:07:53,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:07:53,331 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:07:53,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:07:53,339 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:07:53,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:07:53,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:07:53,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:07:53,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:07:53,351 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:07:53,351 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:07:53,353 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:07:53,354 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:07:53,355 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:07:53,356 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:07:53,357 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:07:53,359 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:07:53,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:07:53,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:07:53,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:07:53,363 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:07:53,363 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:07:53,363 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:07:53,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:07:53,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:07:53,368 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 13:07:53,409 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:07:53,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:07:53,410 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:07:53,411 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:07:53,411 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:07:53,411 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:07:53,411 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:07:53,412 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:07:53,412 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:07:53,412 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:07:53,413 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:07:53,413 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:07:53,414 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:07:53,414 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:07:53,414 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:07:53,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:07:53,415 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:07:53,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:07:53,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:07:53,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:07:53,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:07:53,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:07:53,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:07:53,417 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:07:53,417 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:07:53,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:07:53,417 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:07:53,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:07:53,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:07:53,418 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:07:53,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:07:53,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:07:53,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:07:53,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:07:53,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:07:53,419 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:07:53,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:07:53,420 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:07:53,420 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:07:53,420 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:07:53,421 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74289de26b6d11ce9d727281c5976611ee27d2e8 [2020-11-22 13:07:53,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:07:53,776 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:07:53,778 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:07:53,779 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:07:53,780 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:07:53,781 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan/../../sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c [2020-11-22 13:07:53,851 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan/data/e451183b5/fc026dd4ad5b4f8bace8306f1a34cfb9/FLAG4f872ba5b [2020-11-22 13:07:54,281 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:07:54,281 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c [2020-11-22 13:07:54,291 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan/data/e451183b5/fc026dd4ad5b4f8bace8306f1a34cfb9/FLAG4f872ba5b [2020-11-22 13:07:54,644 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan/data/e451183b5/fc026dd4ad5b4f8bace8306f1a34cfb9 [2020-11-22 13:07:54,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:07:54,648 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:07:54,656 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:07:54,657 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:07:54,660 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:07:54,661 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:07:54" (1/1) ... [2020-11-22 13:07:54,662 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@148d0c43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:54, skipping insertion in model container [2020-11-22 13:07:54,662 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:07:54" (1/1) ... [2020-11-22 13:07:54,670 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:07:54,687 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:07:54,899 WARN L1500 CHandler]: Possible shadowing of function min [2020-11-22 13:07:54,917 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:07:54,949 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) [2020-11-22 13:07:54,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@a3af17c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:54, skipping insertion in model container [2020-11-22 13:07:54,951 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:07:54,952 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2020-11-22 13:07:54,955 INFO L168 Benchmark]: Toolchain (without parser) took 304.65 ms. Allocated memory is still 94.4 MB. Free memory was 57.1 MB in the beginning and 71.0 MB in the end (delta: -13.9 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:54,957 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 94.4 MB. Free memory was 73.6 MB in the beginning and 73.6 MB in the end (delta: 58.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:07:54,959 INFO L168 Benchmark]: CACSL2BoogieTranslator took 295.06 ms. Allocated memory is still 94.4 MB. Free memory was 56.9 MB in the beginning and 71.0 MB in the end (delta: -14.1 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:54,961 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 94.4 MB. Free memory was 73.6 MB in the beginning and 73.6 MB in the end (delta: 58.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 295.06 ms. Allocated memory is still 94.4 MB. Free memory was 56.9 MB in the beginning and 71.0 MB in the end (delta: -14.1 MB). Peak memory consumption was 7.7 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 0.2.0-a4ecdab [2020-11-22 13:07:57,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:07:57,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:07:57,157 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:07:57,158 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:07:57,163 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:07:57,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:07:57,170 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:07:57,174 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:07:57,179 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:07:57,181 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:07:57,185 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:07:57,186 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:07:57,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:07:57,193 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:07:57,195 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:07:57,197 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:07:57,201 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:07:57,204 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:07:57,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:07:57,214 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:07:57,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:07:57,223 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:07:57,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:07:57,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:07:57,235 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:07:57,235 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:07:57,236 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:07:57,238 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:07:57,239 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:07:57,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:07:57,240 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:07:57,242 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:07:57,243 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:07:57,245 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:07:57,245 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:07:57,246 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:07:57,246 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:07:57,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:07:57,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:07:57,249 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:07:57,250 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-11-22 13:07:57,294 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:07:57,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:07:57,296 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:07:57,296 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:07:57,296 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:07:57,296 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:07:57,297 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:07:57,297 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:07:57,298 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:07:57,299 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:07:57,300 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:07:57,300 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:07:57,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:07:57,301 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:07:57,301 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:07:57,301 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:07:57,302 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:07:57,302 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-22 13:07:57,302 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-22 13:07:57,303 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:07:57,303 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:07:57,303 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:07:57,303 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:07:57,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:07:57,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-22 13:07:57,304 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:07:57,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:07:57,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:07:57,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:07:57,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:07:57,306 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:07:57,306 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-11-22 13:07:57,306 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-22 13:07:57,307 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:07:57,307 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:07:57,307 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:07:57,308 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-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74289de26b6d11ce9d727281c5976611ee27d2e8 [2020-11-22 13:07:57,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:07:57,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:07:57,740 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:07:57,742 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:07:57,742 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:07:57,743 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan/../../sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c [2020-11-22 13:07:57,831 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan/data/1fa9f2a3c/e923cfa5e424471293241da0c044c38e/FLAGacbca91fe [2020-11-22 13:07:58,349 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:07:58,349 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/sv-benchmarks/c/verifythis/tree_del_iter_incorrect.c [2020-11-22 13:07:58,358 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan/data/1fa9f2a3c/e923cfa5e424471293241da0c044c38e/FLAGacbca91fe [2020-11-22 13:07:58,697 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan/data/1fa9f2a3c/e923cfa5e424471293241da0c044c38e [2020-11-22 13:07:58,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:07:58,702 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:07:58,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:07:58,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:07:58,710 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:07:58,711 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:07:58" (1/1) ... [2020-11-22 13:07:58,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20b7b032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:58, skipping insertion in model container [2020-11-22 13:07:58,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:07:58" (1/1) ... [2020-11-22 13:07:58,730 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:07:58,752 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:07:58,953 WARN L1500 CHandler]: Possible shadowing of function min [2020-11-22 13:07:58,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:07:58,988 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2020-11-22 13:07:58,993 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:07:59,010 WARN L1500 CHandler]: Possible shadowing of function min [2020-11-22 13:07:59,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:07:59,050 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:07:59,096 WARN L1500 CHandler]: Possible shadowing of function min [2020-11-22 13:07:59,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:07:59,153 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:07:59,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:59 WrapperNode [2020-11-22 13:07:59,153 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:07:59,154 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:07:59,155 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:07:59,155 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:07:59,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:59" (1/1) ... [2020-11-22 13:07:59,173 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:59" (1/1) ... [2020-11-22 13:07:59,199 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:07:59,199 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:07:59,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:07:59,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:07:59,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:59" (1/1) ... [2020-11-22 13:07:59,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:59" (1/1) ... [2020-11-22 13:07:59,214 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:59" (1/1) ... [2020-11-22 13:07:59,214 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:59" (1/1) ... [2020-11-22 13:07:59,228 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:59" (1/1) ... [2020-11-22 13:07:59,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:59" (1/1) ... [2020-11-22 13:07:59,236 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:59" (1/1) ... [2020-11-22 13:07:59,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:07:59,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:07:59,242 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:07:59,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:07:59,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:59" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:07:59,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-22 13:07:59,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-22 13:07:59,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:07:59,314 INFO L130 BoogieDeclarations]: Found specification of procedure min [2020-11-22 13:07:59,314 INFO L138 BoogieDeclarations]: Found implementation of procedure min [2020-11-22 13:07:59,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-11-22 13:07:59,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-22 13:07:59,314 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-11-22 13:07:59,314 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-11-22 13:07:59,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-22 13:07:59,315 INFO L130 BoogieDeclarations]: Found specification of procedure size [2020-11-22 13:07:59,315 INFO L138 BoogieDeclarations]: Found implementation of procedure size [2020-11-22 13:07:59,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:07:59,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:07:59,316 INFO L130 BoogieDeclarations]: Found specification of procedure tree_inorder [2020-11-22 13:07:59,316 INFO L138 BoogieDeclarations]: Found implementation of procedure tree_inorder [2020-11-22 13:07:59,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 13:07:59,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-11-22 13:08:00,072 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:08:00,073 INFO L298 CfgBuilder]: Removed 32 assume(true) statements. [2020-11-22 13:08:00,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:08:00 BoogieIcfgContainer [2020-11-22 13:08:00,075 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:08:00,077 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:08:00,077 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:08:00,080 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:08:00,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:07:58" (1/3) ... [2020-11-22 13:08:00,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60e60bcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:08:00, skipping insertion in model container [2020-11-22 13:08:00,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:59" (2/3) ... [2020-11-22 13:08:00,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60e60bcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:08:00, skipping insertion in model container [2020-11-22 13:08:00,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:08:00" (3/3) ... [2020-11-22 13:08:00,084 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_del_iter_incorrect.c [2020-11-22 13:08:00,095 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:08:00,100 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-11-22 13:08:00,116 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-22 13:08:00,148 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:08:00,148 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:08:00,148 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:08:00,148 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:08:00,148 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:08:00,148 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:08:00,149 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:08:00,149 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:08:00,163 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states. [2020-11-22 13:08:00,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-22 13:08:00,170 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:08:00,171 INFO L422 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] [2020-11-22 13:08:00,171 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:08:00,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:08:00,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1820768447, now seen corresponding path program 1 times [2020-11-22 13:08:00,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 13:08:00,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [760424702] [2020-11-22 13:08:00,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-11-22 13:08:00,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:08:00,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-22 13:08:00,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:08:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:00,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:08:00,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:00,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [760424702] [2020-11-22 13:08:00,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:08:00,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-22 13:08:00,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97736886] [2020-11-22 13:08:00,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-22 13:08:00,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-22 13:08:00,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-22 13:08:00,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 13:08:00,415 INFO L87 Difference]: Start difference. First operand 82 states. Second operand 2 states. [2020-11-22 13:08:00,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:08:00,440 INFO L93 Difference]: Finished difference Result 135 states and 174 transitions. [2020-11-22 13:08:00,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 13:08:00,441 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2020-11-22 13:08:00,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:08:00,450 INFO L225 Difference]: With dead ends: 135 [2020-11-22 13:08:00,450 INFO L226 Difference]: Without dead ends: 73 [2020-11-22 13:08:00,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 13:08:00,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-22 13:08:00,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-11-22 13:08:00,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-22 13:08:00,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2020-11-22 13:08:00,496 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 30 [2020-11-22 13:08:00,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:08:00,497 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2020-11-22 13:08:00,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-22 13:08:00,498 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2020-11-22 13:08:00,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-22 13:08:00,502 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:08:00,502 INFO L422 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] [2020-11-22 13:08:00,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-22 13:08:00,715 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:08:00,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:08:00,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1773134271, now seen corresponding path program 1 times [2020-11-22 13:08:00,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 13:08:00,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1604907887] [2020-11-22 13:08:00,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-11-22 13:08:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:08:00,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-22 13:08:00,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:08:00,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:00,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:08:00,907 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-22 13:08:00,907 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 13:08:00,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:08:00,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1604907887] [2020-11-22 13:08:00,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:08:00,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2020-11-22 13:08:00,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254839871] [2020-11-22 13:08:00,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 13:08:00,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-22 13:08:00,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 13:08:00,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:08:00,953 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand 5 states. [2020-11-22 13:08:00,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:08:01,000 INFO L93 Difference]: Finished difference Result 125 states and 154 transitions. [2020-11-22 13:08:01,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 13:08:01,001 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-11-22 13:08:01,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:08:01,009 INFO L225 Difference]: With dead ends: 125 [2020-11-22 13:08:01,012 INFO L226 Difference]: Without dead ends: 75 [2020-11-22 13:08:01,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 13:08:01,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-11-22 13:08:01,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-11-22 13:08:01,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-11-22 13:08:01,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2020-11-22 13:08:01,041 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 30 [2020-11-22 13:08:01,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:08:01,042 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2020-11-22 13:08:01,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 13:08:01,043 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2020-11-22 13:08:01,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-22 13:08:01,047 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:08:01,047 INFO L422 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] [2020-11-22 13:08:01,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-22 13:08:01,266 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:08:01,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:08:01,267 INFO L82 PathProgramCache]: Analyzing trace with hash 459981034, now seen corresponding path program 1 times [2020-11-22 13:08:01,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 13:08:01,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [110235574] [2020-11-22 13:08:01,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-11-22 13:08:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:08:01,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-22 13:08:01,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:08:01,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-22 13:08:01,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:08:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-22 13:08:01,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [110235574] [2020-11-22 13:08:01,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1607784984] [2020-11-22 13:08:01,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-11-22 13:08:01,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:08:01,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-22 13:08:01,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:08:01,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-22 13:08:01,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:08:02,120 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-22 13:08:02,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616891311] [2020-11-22 13:08:02,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:08:02,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:08:02,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-22 13:08:02,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:08:02,256 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-22 13:08:02,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:08:02,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-22 13:08:02,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-11-22 13:08:02,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 8 [2020-11-22 13:08:02,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835427105] [2020-11-22 13:08:02,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-22 13:08:02,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-22 13:08:02,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-22 13:08:02,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-22 13:08:02,442 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand 8 states. [2020-11-22 13:08:02,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:08:02,694 INFO L93 Difference]: Finished difference Result 133 states and 167 transitions. [2020-11-22 13:08:02,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-22 13:08:02,696 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-11-22 13:08:02,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:08:02,698 INFO L225 Difference]: With dead ends: 133 [2020-11-22 13:08:02,698 INFO L226 Difference]: Without dead ends: 77 [2020-11-22 13:08:02,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 238 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-22 13:08:02,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-22 13:08:02,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-11-22 13:08:02,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-22 13:08:02,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2020-11-22 13:08:02,712 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 42 [2020-11-22 13:08:02,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:08:02,712 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2020-11-22 13:08:02,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-22 13:08:02,712 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2020-11-22 13:08:02,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-22 13:08:02,714 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:08:02,715 INFO L422 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] [2020-11-22 13:08:03,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3,5 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:08:03,338 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:08:03,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:08:03,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1512984621, now seen corresponding path program 1 times [2020-11-22 13:08:03,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 13:08:03,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [369336298] [2020-11-22 13:08:03,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-11-22 13:08:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:08:03,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-22 13:08:03,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:08:03,610 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-11-22 13:08:03,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:08:03,759 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-11-22 13:08:03,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [369336298] [2020-11-22 13:08:03,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:08:03,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 9 [2020-11-22 13:08:03,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728716371] [2020-11-22 13:08:03,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-22 13:08:03,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-22 13:08:03,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-22 13:08:03,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-11-22 13:08:03,762 INFO L87 Difference]: Start difference. First operand 77 states and 97 transitions. Second operand 9 states. [2020-11-22 13:08:04,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:08:04,036 INFO L93 Difference]: Finished difference Result 133 states and 167 transitions. [2020-11-22 13:08:04,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-22 13:08:04,037 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2020-11-22 13:08:04,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:08:04,039 INFO L225 Difference]: With dead ends: 133 [2020-11-22 13:08:04,040 INFO L226 Difference]: Without dead ends: 79 [2020-11-22 13:08:04,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-11-22 13:08:04,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-22 13:08:04,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-11-22 13:08:04,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-22 13:08:04,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2020-11-22 13:08:04,053 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 52 [2020-11-22 13:08:04,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:08:04,054 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2020-11-22 13:08:04,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-22 13:08:04,054 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2020-11-22 13:08:04,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-11-22 13:08:04,057 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:08:04,057 INFO L422 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] [2020-11-22 13:08:04,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-11-22 13:08:04,275 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:08:04,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:08:04,275 INFO L82 PathProgramCache]: Analyzing trace with hash -2124599638, now seen corresponding path program 1 times [2020-11-22 13:08:04,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 13:08:04,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1367709975] [2020-11-22 13:08:04,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-11-22 13:08:04,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:08:04,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-22 13:08:04,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:08:04,552 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-11-22 13:08:04,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:08:04,723 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-11-22 13:08:04,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1367709975] [2020-11-22 13:08:04,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:08:04,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 9 [2020-11-22 13:08:04,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553247167] [2020-11-22 13:08:04,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-22 13:08:04,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-22 13:08:04,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-22 13:08:04,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-11-22 13:08:04,725 INFO L87 Difference]: Start difference. First operand 79 states and 100 transitions. Second operand 9 states. [2020-11-22 13:08:05,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:08:05,228 INFO L93 Difference]: Finished difference Result 128 states and 162 transitions. [2020-11-22 13:08:05,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-22 13:08:05,229 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-11-22 13:08:05,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:08:05,231 INFO L225 Difference]: With dead ends: 128 [2020-11-22 13:08:05,231 INFO L226 Difference]: Without dead ends: 81 [2020-11-22 13:08:05,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-11-22 13:08:05,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-22 13:08:05,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-11-22 13:08:05,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-22 13:08:05,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2020-11-22 13:08:05,260 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 65 [2020-11-22 13:08:05,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:08:05,261 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2020-11-22 13:08:05,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-22 13:08:05,261 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2020-11-22 13:08:05,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-11-22 13:08:05,268 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:08:05,273 INFO L422 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] [2020-11-22 13:08:05,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-11-22 13:08:05,474 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:08:05,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:08:05,474 INFO L82 PathProgramCache]: Analyzing trace with hash 334261757, now seen corresponding path program 1 times [2020-11-22 13:08:05,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-22 13:08:05,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [366251031] [2020-11-22 13:08:05,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-11-22 13:08:05,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:08:05,755 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:08:05,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:08:05,998 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:08:06,129 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-11-22 13:08:06,129 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-22 13:08:06,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-11-22 13:08:06,374 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:08:06,374 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:08:06,375 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:08:06,375 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:08:06,380 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:08:06,381 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:08:06,381 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:08:06,381 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:08:06,382 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:08:06,382 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:08:06,382 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:08:06,383 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:08:06,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:08:06 BoogieIcfgContainer [2020-11-22 13:08:06,428 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:08:06,429 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:08:06,429 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:08:06,429 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:08:06,429 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:08:00" (3/4) ... [2020-11-22 13:08:06,437 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-22 13:08:06,445 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:08:06,445 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:08:06,446 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:08:06,446 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:08:06,448 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:08:06,448 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:08:06,448 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:08:06,449 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:08:06,449 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:08:06,449 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:08:06,450 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:08:06,450 WARN L417 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.meminit_#ptr : $Pointer$ not handled [2020-11-22 13:08:06,541 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_df9a548f-4408-4997-a66a-f28969dd48dc/bin/utaipan/witness.graphml [2020-11-22 13:08:06,541 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:08:06,543 INFO L168 Benchmark]: Toolchain (without parser) took 7840.36 ms. Allocated memory was 60.8 MB in the beginning and 107.0 MB in the end (delta: 46.1 MB). Free memory was 42.3 MB in the beginning and 87.1 MB in the end (delta: -44.8 MB). Peak memory consumption was 55.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:08:06,543 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 60.8 MB. Free memory was 43.8 MB in the beginning and 43.7 MB in the end (delta: 83.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:08:06,544 INFO L168 Benchmark]: CACSL2BoogieTranslator took 448.13 ms. Allocated memory is still 60.8 MB. Free memory was 41.9 MB in the beginning and 42.3 MB in the end (delta: -347.0 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-22 13:08:06,548 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.27 ms. Allocated memory is still 60.8 MB. Free memory was 42.3 MB in the beginning and 40.1 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:08:06,549 INFO L168 Benchmark]: Boogie Preprocessor took 41.67 ms. Allocated memory is still 60.8 MB. Free memory was 40.1 MB in the beginning and 38.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:08:06,549 INFO L168 Benchmark]: RCFGBuilder took 833.01 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 38.1 MB in the beginning and 55.2 MB in the end (delta: -17.1 MB). Peak memory consumption was 21.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:08:06,550 INFO L168 Benchmark]: TraceAbstraction took 6351.07 ms. Allocated memory was 73.4 MB in the beginning and 107.0 MB in the end (delta: 33.6 MB). Free memory was 54.8 MB in the beginning and 40.0 MB in the end (delta: 14.8 MB). Peak memory consumption was 48.6 MB. Max. memory is 16.1 GB. [2020-11-22 13:08:06,550 INFO L168 Benchmark]: Witness Printer took 112.35 ms. Allocated memory is still 107.0 MB. Free memory was 40.0 MB in the beginning and 87.1 MB in the end (delta: -47.1 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:08:06,553 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 60.8 MB. Free memory was 43.8 MB in the beginning and 43.7 MB in the end (delta: 83.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 448.13 ms. Allocated memory is still 60.8 MB. Free memory was 41.9 MB in the beginning and 42.3 MB in the end (delta: -347.0 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.27 ms. Allocated memory is still 60.8 MB. Free memory was 42.3 MB in the beginning and 40.1 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.67 ms. Allocated memory is still 60.8 MB. Free memory was 40.1 MB in the beginning and 38.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 833.01 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 38.1 MB in the beginning and 55.2 MB in the end (delta: -17.1 MB). Peak memory consumption was 21.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6351.07 ms. Allocated memory was 73.4 MB in the beginning and 107.0 MB in the end (delta: 33.6 MB). Free memory was 54.8 MB in the beginning and 40.0 MB in the end (delta: 14.8 MB). Peak memory consumption was 48.6 MB. Max. memory is 16.1 GB. * Witness Printer took 112.35 ms. Allocated memory is still 107.0 MB. Free memory was 40.0 MB in the beginning and 87.1 MB in the end (delta: -47.1 MB). Peak memory consumption was 7.4 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: - CounterExampleResult [Line: 14]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_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 [malloc(sizeof(struct node))={3:0}, n={3:0}, 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 [malloc(sizeof(struct node))={3:0}, n={3:0}, nondet_tree()={0:0}] [L31] n->right = nondet_tree() [L32] return n; VAL [\result={3:0}, malloc(sizeof(struct node))={3:0}, n={3:0}] [L105] RET nondet_tree() [L83] CALL, EXPR min(t) VAL [n={3:0}] [L37] COND FALSE !(!n) [L40] EXPR n->left VAL [n={3:0}, n={3:0}, 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={3:0}, n={3:0}, n->left={0:0}] [L40] int a = min(n->left); [L41] EXPR n->right VAL [a=2147483647, n={3:0}, n={3:0}, 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={3:0}, n={3:0}, 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={3:0}, n={3:0}] [L83] RET, EXPR min(t) [L83] int a = min(t); [L84] int b; [L86] CALL, EXPR size(t) VAL [t={3:0}] [L78] COND FALSE !(!t) [L79] EXPR t->left VAL [t={3:0}, t={3:0}, 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={3:0}, t={3:0}, t->left={0:0}] [L79] EXPR t->right VAL [size(t->left)=0, t={3:0}, t={3:0}, 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={3:0}, t={3:0}, 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={5:0}, t={3:0}] [L67] COND FALSE !(!t) [L70] EXPR t->left VAL [\old(i)=1, a={5:0}, a={5:0}, i=1, t={3:0}, t={3:0}, t->left={0:0}] [L70] CALL, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={5:0}, t={0:0}] [L67] COND TRUE !t [L68] return i; VAL [\old(i)=1, \result=1, a={5:0}, a={5:0}, i=1, t={0:0}, t={0:0}] [L70] RET, EXPR tree_inorder(t->left, a, i) VAL [\old(i)=1, a={5:0}, a={5:0}, i=1, t={3:0}, t={3:0}, 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={5:0}, a={5:0}, i=2, t={3:0}, t={3:0}, t->right={0:0}] [L72] CALL, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=2, a={5:0}, t={0:0}] [L67] COND TRUE !t [L68] return i; VAL [\old(i)=2, \result=2, a={5:0}, a={5:0}, i=2, t={0:0}, t={0:0}] [L72] RET, EXPR tree_inorder(t->right, a, i) VAL [\old(i)=1, a={5:0}, a={5:0}, i=2, t={3:0}, t={3:0}, 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={5:0}, a={5:0}, i=2, t={3:0}, t={3:0}] [L89] RET tree_inorder(t, x, n) [L90] x[0] [L16] COND TRUE !cond [L14] __assert_fail("0", "tree_del_iter_incorrect.c", 14, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 82 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.2s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 433 SDtfs, 163 SDslu, 1590 SDs, 0 SdLazy, 247 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 603 GetRequests, 569 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=82occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 380 NumberOfCodeBlocks, 380 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 592 ConstructedInterpolants, 0 QuantifiedInterpolants, 60718 SizeOfPredicates, 36 NumberOfNonLiveVariables, 1067 ConjunctsInSsa, 64 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! Received shutdown request...