./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-lopstr16/base_case.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-lopstr16/base_case.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF --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 f9dd43881ccf56b8e6da6d28cc61ed7f891fae597b16e121f5ac65378400d596 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:26:23,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:26:23,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:26:23,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:26:23,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:26:23,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:26:23,111 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:26:23,113 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:26:23,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:26:23,116 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:26:23,117 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:26:23,118 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:26:23,119 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:26:23,120 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:26:23,121 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:26:23,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:26:23,124 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:26:23,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:26:23,127 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:26:23,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:26:23,141 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:26:23,142 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:26:23,146 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:26:23,147 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:26:23,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:26:23,157 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:26:23,157 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:26:23,158 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:26:23,159 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:26:23,160 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:26:23,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:26:23,161 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:26:23,162 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:26:23,163 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:26:23,164 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:26:23,164 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:26:23,165 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:26:23,165 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:26:23,165 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:26:23,166 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:26:23,166 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:26:23,167 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 02:26:23,191 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:26:23,191 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:26:23,192 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:26:23,192 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:26:23,192 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:26:23,192 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:26:23,193 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:26:23,193 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:26:23,193 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:26:23,193 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:26:23,193 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:26:23,194 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:26:23,194 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:26:23,194 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:26:23,194 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:26:23,194 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:26:23,195 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:26:23,195 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:26:23,195 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:26:23,195 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:26:23,196 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:26:23,196 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:26:23,196 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:26:23,196 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:26:23,196 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:26:23,197 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:26:23,197 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:26:23,197 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:26:23,197 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:26:23,197 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:26:23,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:26:23,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:26:23,198 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:26:23,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:26:23,198 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:26:23,198 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:26:23,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:26:23,199 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:26:23,199 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:26:23,199 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:26:23,199 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9dd43881ccf56b8e6da6d28cc61ed7f891fae597b16e121f5ac65378400d596 [2021-11-13 02:26:23,414 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:26:23,434 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:26:23,437 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:26:23,438 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:26:23,439 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:26:23,440 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/array-lopstr16/base_case.i [2021-11-13 02:26:23,508 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/data/74dd94ff8/366c6ee54ba04e998f82f26f5e243af1/FLAG10411c043 [2021-11-13 02:26:23,928 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:26:23,929 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/sv-benchmarks/c/array-lopstr16/base_case.i [2021-11-13 02:26:23,936 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/data/74dd94ff8/366c6ee54ba04e998f82f26f5e243af1/FLAG10411c043 [2021-11-13 02:26:23,950 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/data/74dd94ff8/366c6ee54ba04e998f82f26f5e243af1 [2021-11-13 02:26:23,952 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:26:23,953 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:26:23,955 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:26:23,955 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:26:23,958 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:26:23,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:26:23" (1/1) ... [2021-11-13 02:26:23,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2aa5c78d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:23, skipping insertion in model container [2021-11-13 02:26:23,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:26:23" (1/1) ... [2021-11-13 02:26:23,967 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:26:23,983 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:26:24,147 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/sv-benchmarks/c/array-lopstr16/base_case.i[802,815] [2021-11-13 02:26:24,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:26:24,183 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-13 02:26:24,184 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@179e0316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:24, skipping insertion in model container [2021-11-13 02:26:24,184 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:26:24,184 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 02:26:24,186 INFO L158 Benchmark]: Toolchain (without parser) took 231.72ms. Allocated memory is still 123.7MB. Free memory was 89.5MB in the beginning and 100.3MB in the end (delta: -10.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 02:26:24,188 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 88.1MB. Free memory was 46.2MB in the beginning and 46.2MB in the end (delta: 40.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:26:24,189 INFO L158 Benchmark]: CACSL2BoogieTranslator took 229.19ms. Allocated memory is still 123.7MB. Free memory was 89.5MB in the beginning and 100.3MB in the end (delta: -10.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 02:26:24,191 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 88.1MB. Free memory was 46.2MB in the beginning and 46.2MB in the end (delta: 40.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 229.19ms. Allocated memory is still 123.7MB. Free memory was 89.5MB in the beginning and 100.3MB in the end (delta: -10.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 27]: 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... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-lopstr16/base_case.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF --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 f9dd43881ccf56b8e6da6d28cc61ed7f891fae597b16e121f5ac65378400d596 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:26:26,393 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:26:26,395 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:26:26,443 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:26:26,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:26:26,447 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:26:26,449 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:26:26,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:26:26,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:26:26,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:26:26,469 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:26:26,471 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:26:26,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:26:26,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:26:26,476 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:26:26,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:26:26,482 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:26:26,483 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:26:26,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:26:26,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:26:26,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:26:26,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:26:26,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:26:26,501 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:26:26,509 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:26:26,510 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:26:26,510 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:26:26,512 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:26:26,513 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:26:26,514 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:26:26,514 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:26:26,515 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:26:26,517 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:26:26,518 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:26:26,519 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:26:26,519 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:26:26,532 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:26:26,533 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:26:26,533 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:26:26,535 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:26:26,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:26:26,537 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-13 02:26:26,587 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:26:26,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:26:26,589 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:26:26,589 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:26:26,589 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:26:26,589 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:26:26,590 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:26:26,590 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:26:26,590 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:26:26,590 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:26:26,593 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:26:26,593 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:26:26,593 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:26:26,593 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:26:26,594 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:26:26,594 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:26:26,594 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:26:26,594 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:26:26,595 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 02:26:26,595 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 02:26:26,595 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:26:26,595 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:26:26,596 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:26:26,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:26:26,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:26:26,596 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 02:26:26,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:26:26,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:26:26,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:26:26,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:26:26,598 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:26:26,598 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 02:26:26,598 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 02:26:26,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:26:26,599 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:26:26,599 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:26:26,599 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9dd43881ccf56b8e6da6d28cc61ed7f891fae597b16e121f5ac65378400d596 [2021-11-13 02:26:26,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:26:27,021 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:26:27,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:26:27,025 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:26:27,026 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:26:27,027 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/array-lopstr16/base_case.i [2021-11-13 02:26:27,103 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/data/f3244b68e/fb9cd0d9101146a3b9094f363353a837/FLAG6512c54b8 [2021-11-13 02:26:27,681 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:26:27,682 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/sv-benchmarks/c/array-lopstr16/base_case.i [2021-11-13 02:26:27,689 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/data/f3244b68e/fb9cd0d9101146a3b9094f363353a837/FLAG6512c54b8 [2021-11-13 02:26:28,046 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/data/f3244b68e/fb9cd0d9101146a3b9094f363353a837 [2021-11-13 02:26:28,053 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:26:28,055 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:26:28,056 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:26:28,056 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:26:28,060 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:26:28,060 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:26:28" (1/1) ... [2021-11-13 02:26:28,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39b707ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:28, skipping insertion in model container [2021-11-13 02:26:28,062 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:26:28" (1/1) ... [2021-11-13 02:26:28,070 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:26:28,089 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:26:28,215 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/sv-benchmarks/c/array-lopstr16/base_case.i[802,815] [2021-11-13 02:26:28,232 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:26:28,245 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 02:26:28,251 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:26:28,286 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/sv-benchmarks/c/array-lopstr16/base_case.i[802,815] [2021-11-13 02:26:28,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:26:28,310 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:26:28,325 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/sv-benchmarks/c/array-lopstr16/base_case.i[802,815] [2021-11-13 02:26:28,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:26:28,348 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:26:28,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:28 WrapperNode [2021-11-13 02:26:28,349 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:26:28,350 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:26:28,350 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:26:28,350 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:26:28,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:28" (1/1) ... [2021-11-13 02:26:28,366 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:28" (1/1) ... [2021-11-13 02:26:28,385 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:26:28,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:26:28,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:26:28,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:26:28,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:28" (1/1) ... [2021-11-13 02:26:28,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:28" (1/1) ... [2021-11-13 02:26:28,398 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:28" (1/1) ... [2021-11-13 02:26:28,399 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:28" (1/1) ... [2021-11-13 02:26:28,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:28" (1/1) ... [2021-11-13 02:26:28,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:28" (1/1) ... [2021-11-13 02:26:28,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:28" (1/1) ... [2021-11-13 02:26:28,415 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:26:28,416 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:26:28,416 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:26:28,416 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:26:28,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:28" (1/1) ... [2021-11-13 02:26:28,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:26:28,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:26:28,448 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:26:28,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:26:28,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 02:26:28,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 02:26:28,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 02:26:28,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:26:28,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 02:26:28,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 02:26:28,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:26:28,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:26:28,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 02:26:28,801 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:26:28,801 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-13 02:26:28,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:26:28 BoogieIcfgContainer [2021-11-13 02:26:28,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:26:28,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:26:28,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:26:28,808 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:26:28,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:26:28" (1/3) ... [2021-11-13 02:26:28,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13e791c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:26:28, skipping insertion in model container [2021-11-13 02:26:28,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:26:28" (2/3) ... [2021-11-13 02:26:28,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13e791c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:26:28, skipping insertion in model container [2021-11-13 02:26:28,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:26:28" (3/3) ... [2021-11-13 02:26:28,812 INFO L111 eAbstractionObserver]: Analyzing ICFG base_case.i [2021-11-13 02:26:28,817 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:26:28,817 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 02:26:28,865 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:26:28,872 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 02:26:28,873 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 02:26:28,886 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:26:28,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-13 02:26:28,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:26:28,893 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:26:28,893 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:26:28,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:26:28,899 INFO L85 PathProgramCache]: Analyzing trace with hash 590963434, now seen corresponding path program 1 times [2021-11-13 02:26:28,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:26:28,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358739211] [2021-11-13 02:26:28,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:26:28,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:26:28,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:26:28,916 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:26:28,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 02:26:29,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:26:29,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 02:26:29,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:26:29,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:26:29,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:26:29,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:26:29,073 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:26:29,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358739211] [2021-11-13 02:26:29,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358739211] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:26:29,074 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:26:29,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-13 02:26:29,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668311244] [2021-11-13 02:26:29,077 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:26:29,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 02:26:29,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:26:29,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 02:26:29,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 02:26:29,110 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:26:29,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:26:29,124 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2021-11-13 02:26:29,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 02:26:29,126 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-13 02:26:29,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:26:29,134 INFO L225 Difference]: With dead ends: 30 [2021-11-13 02:26:29,134 INFO L226 Difference]: Without dead ends: 14 [2021-11-13 02:26:29,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 02:26:29,145 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.57ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 02:26:29,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.57ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 02:26:29,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-13 02:26:29,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-13 02:26:29,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:26:29,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-11-13 02:26:29,199 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2021-11-13 02:26:29,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:26:29,200 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-13 02:26:29,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:26:29,200 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-11-13 02:26:29,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-13 02:26:29,201 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:26:29,202 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:26:29,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-13 02:26:29,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:26:29,413 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:26:29,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:26:29,417 INFO L85 PathProgramCache]: Analyzing trace with hash 218784471, now seen corresponding path program 1 times [2021-11-13 02:26:29,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:26:29,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [896941385] [2021-11-13 02:26:29,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:26:29,421 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:26:29,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:26:29,422 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:26:29,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 02:26:29,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:26:29,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:26:29,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:26:29,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:26:29,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:26:29,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:26:29,589 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:26:29,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [896941385] [2021-11-13 02:26:29,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [896941385] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:26:29,590 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:26:29,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 02:26:29,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801869281] [2021-11-13 02:26:29,590 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:26:29,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:26:29,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:26:29,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:26:29,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:26:29,593 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:26:29,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:26:29,681 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2021-11-13 02:26:29,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:26:29,682 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-13 02:26:29,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:26:29,683 INFO L225 Difference]: With dead ends: 35 [2021-11-13 02:26:29,683 INFO L226 Difference]: Without dead ends: 27 [2021-11-13 02:26:29,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:26:29,685 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.16ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.02ms IncrementalHoareTripleChecker+Time [2021-11-13 02:26:29,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 1.16ms Time], IncrementalHoareTripleChecker [5 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 75.02ms Time] [2021-11-13 02:26:29,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-13 02:26:29,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-11-13 02:26:29,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:26:29,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-13 02:26:29,700 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 8 [2021-11-13 02:26:29,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:26:29,700 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-13 02:26:29,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:26:29,702 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-13 02:26:29,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-13 02:26:29,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:26:29,703 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:26:29,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:26:29,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:26:29,904 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:26:29,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:26:29,904 INFO L85 PathProgramCache]: Analyzing trace with hash 2010321697, now seen corresponding path program 1 times [2021-11-13 02:26:29,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:26:29,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2019295610] [2021-11-13 02:26:29,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:26:29,907 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:26:29,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:26:29,909 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:26:29,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 02:26:30,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:26:30,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:26:30,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:26:30,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:26:30,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:26:30,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:26:30,220 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:26:30,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2019295610] [2021-11-13 02:26:30,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2019295610] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:26:30,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [676213227] [2021-11-13 02:26:30,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:26:30,221 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:26:30,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:26:30,223 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:26:30,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-13 02:26:30,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:26:30,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:26:30,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:26:30,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:26:30,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:26:30,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:26:30,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [676213227] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:26:30,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363151966] [2021-11-13 02:26:30,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:26:30,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:26:30,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:26:30,452 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:26:30,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 02:26:30,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:26:30,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:26:30,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:26:30,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:26:30,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:26:30,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:26:30,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363151966] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:26:30,625 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:26:30,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-13 02:26:30,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711726113] [2021-11-13 02:26:30,626 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:26:30,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:26:30,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:26:30,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:26:30,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:26:30,630 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:26:30,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:26:30,950 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2021-11-13 02:26:30,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:26:30,951 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-13 02:26:30,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:26:30,952 INFO L225 Difference]: With dead ends: 79 [2021-11-13 02:26:30,952 INFO L226 Difference]: Without dead ends: 71 [2021-11-13 02:26:30,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:26:30,954 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 117 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 185.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.96ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 242.65ms IncrementalHoareTripleChecker+Time [2021-11-13 02:26:30,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 97 Invalid, 87 Unknown, 0 Unchecked, 4.96ms Time], IncrementalHoareTripleChecker [19 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 242.65ms Time] [2021-11-13 02:26:30,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-13 02:26:30,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 35. [2021-11-13 02:26:30,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:26:30,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2021-11-13 02:26:30,963 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 16 [2021-11-13 02:26:30,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:26:30,963 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2021-11-13 02:26:30,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:26:30,964 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2021-11-13 02:26:30,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-13 02:26:30,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:26:30,965 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:26:31,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 02:26:31,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-13 02:26:31,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-13 02:26:31,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:26:31,579 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:26:31,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:26:31,580 INFO L85 PathProgramCache]: Analyzing trace with hash 2000074165, now seen corresponding path program 2 times [2021-11-13 02:26:31,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:26:31,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1895905927] [2021-11-13 02:26:31,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 02:26:31,581 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:26:31,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:26:31,582 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:26:31,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 02:26:31,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 02:26:31,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:26:31,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:26:31,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:26:31,931 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:26:31,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:26:32,225 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:26:32,226 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:26:32,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1895905927] [2021-11-13 02:26:32,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1895905927] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:26:32,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [663837604] [2021-11-13 02:26:32,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 02:26:32,227 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:26:32,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:26:32,228 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:26:32,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-13 02:26:32,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 02:26:32,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:26:32,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:26:32,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:26:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:26:32,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:26:32,699 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:26:32,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [663837604] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:26:32,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040299335] [2021-11-13 02:26:32,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 02:26:32,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:26:32,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:26:32,706 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:26:32,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 02:26:32,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 02:26:32,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:26:32,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:26:32,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:26:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:26:32,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:26:33,070 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:26:33,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040299335] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:26:33,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 02:26:33,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2021-11-13 02:26:33,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243385622] [2021-11-13 02:26:33,071 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 02:26:33,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-13 02:26:33,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:26:33,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-13 02:26:33,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:26:33,073 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:26:34,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:26:34,255 INFO L93 Difference]: Finished difference Result 167 states and 205 transitions. [2021-11-13 02:26:34,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 02:26:34,256 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-13 02:26:34,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:26:34,259 INFO L225 Difference]: With dead ends: 167 [2021-11-13 02:26:34,259 INFO L226 Difference]: Without dead ends: 159 [2021-11-13 02:26:34,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-11-13 02:26:34,261 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 525 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 705.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.57ms SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 821.90ms IncrementalHoareTripleChecker+Time [2021-11-13 02:26:34,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 452 Invalid, 374 Unknown, 0 Unchecked, 6.57ms Time], IncrementalHoareTripleChecker [75 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 821.90ms Time] [2021-11-13 02:26:34,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-13 02:26:34,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 67. [2021-11-13 02:26:34,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 66 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:26:34,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2021-11-13 02:26:34,282 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 32 [2021-11-13 02:26:34,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:26:34,282 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2021-11-13 02:26:34,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:26:34,283 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2021-11-13 02:26:34,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-13 02:26:34,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:26:34,286 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:26:34,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 02:26:34,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-13 02:26:34,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 02:26:34,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:26:34,896 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:26:34,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:26:34,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1784611549, now seen corresponding path program 3 times [2021-11-13 02:26:34,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:26:34,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [68494047] [2021-11-13 02:26:34,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:26:34,898 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:26:34,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:26:34,910 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:26:34,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 02:26:40,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-13 02:26:40,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:26:40,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 02:26:40,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:26:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:26:40,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:26:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:26:42,506 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:26:42,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [68494047] [2021-11-13 02:26:42,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [68494047] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:26:42,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1305011306] [2021-11-13 02:26:42,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:26:42,507 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:26:42,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:26:42,513 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:26:42,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-13 02:26:42,661 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 02:26:42,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436468509] [2021-11-13 02:26:42,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:26:42,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:26:42,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:26:42,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 1 [2021-11-13 02:26:42,672 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:26:42,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e92db4b5-b1ce-4567-8f56-13df0407df60/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process