./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/prefixsum_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b76114a9d678a678cbffe7e7ac6a1457b6f06d7b ............................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b76114a9d678a678cbffe7e7ac6a1457b6f06d7b ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 06:44:56,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 06:44:56,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 06:44:56,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 06:44:56,442 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 06:44:56,447 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 06:44:56,450 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 06:44:56,454 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 06:44:56,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 06:44:56,462 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 06:44:56,463 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 06:44:56,465 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 06:44:56,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 06:44:56,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 06:44:56,471 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 06:44:56,474 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 06:44:56,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 06:44:56,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 06:44:56,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 06:44:56,490 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 06:44:56,492 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 06:44:56,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 06:44:56,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 06:44:56,497 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 06:44:56,506 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 06:44:56,507 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 06:44:56,507 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 06:44:56,509 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 06:44:56,510 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 06:44:56,512 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 06:44:56,512 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 06:44:56,513 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 06:44:56,515 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 06:44:56,517 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 06:44:56,518 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 06:44:56,519 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 06:44:56,520 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 06:44:56,520 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 06:44:56,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 06:44:56,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 06:44:56,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 06:44:56,523 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 06:44:56,566 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 06:44:56,566 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 06:44:56,568 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 06:44:56,568 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 06:44:56,569 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 06:44:56,569 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 06:44:56,569 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 06:44:56,569 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 06:44:56,575 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 06:44:56,576 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 06:44:56,577 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 06:44:56,577 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 06:44:56,577 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 06:44:56,577 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 06:44:56,578 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 06:44:56,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 06:44:56,579 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 06:44:56,579 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 06:44:56,579 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 06:44:56,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 06:44:56,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 06:44:56,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 06:44:56,580 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 06:44:56,581 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 06:44:56,581 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 06:44:56,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 06:44:56,581 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 06:44:56,582 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 06:44:56,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 06:44:56,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 06:44:56,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:44:56,584 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 06:44:56,584 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 06:44:56,585 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 06:44:56,585 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 06:44:56,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 06:44:56,585 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 06:44:56,585 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 06:44:56,586 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 06:44:56,586 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_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b76114a9d678a678cbffe7e7ac6a1457b6f06d7b [2021-10-13 06:44:56,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 06:44:56,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 06:44:56,913 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 06:44:56,914 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 06:44:56,915 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 06:44:56,916 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/verifythis/prefixsum_rec.c [2021-10-13 06:44:56,998 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/data/9a8c0061f/0aa49809e9e6469594a3f4073a4a95b3/FLAG563ec4c94 [2021-10-13 06:44:57,494 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 06:44:57,494 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/sv-benchmarks/c/verifythis/prefixsum_rec.c [2021-10-13 06:44:57,508 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/data/9a8c0061f/0aa49809e9e6469594a3f4073a4a95b3/FLAG563ec4c94 [2021-10-13 06:44:57,834 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/data/9a8c0061f/0aa49809e9e6469594a3f4073a4a95b3 [2021-10-13 06:44:57,837 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 06:44:57,838 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 06:44:57,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 06:44:57,844 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 06:44:57,848 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 06:44:57,849 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:44:57" (1/1) ... [2021-10-13 06:44:57,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3691a88b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:57, skipping insertion in model container [2021-10-13 06:44:57,852 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:44:57" (1/1) ... [2021-10-13 06:44:57,860 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 06:44:57,880 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 06:44:58,055 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_fd19fd40-03e1-45e7-902e-88154f42bb7b/sv-benchmarks/c/verifythis/prefixsum_rec.c[525,538] [2021-10-13 06:44:58,081 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:44:58,108 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 06:44:58,121 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_fd19fd40-03e1-45e7-902e-88154f42bb7b/sv-benchmarks/c/verifythis/prefixsum_rec.c[525,538] [2021-10-13 06:44:58,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:44:58,150 INFO L208 MainTranslator]: Completed translation [2021-10-13 06:44:58,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:58 WrapperNode [2021-10-13 06:44:58,151 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 06:44:58,152 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 06:44:58,153 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 06:44:58,153 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 06:44:58,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:58" (1/1) ... [2021-10-13 06:44:58,182 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:58" (1/1) ... [2021-10-13 06:44:58,222 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 06:44:58,223 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 06:44:58,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 06:44:58,223 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 06:44:58,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:58" (1/1) ... [2021-10-13 06:44:58,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:58" (1/1) ... [2021-10-13 06:44:58,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:58" (1/1) ... [2021-10-13 06:44:58,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:58" (1/1) ... [2021-10-13 06:44:58,262 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:58" (1/1) ... [2021-10-13 06:44:58,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:58" (1/1) ... [2021-10-13 06:44:58,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:58" (1/1) ... [2021-10-13 06:44:58,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 06:44:58,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 06:44:58,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 06:44:58,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 06:44:58,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:58" (1/1) ... [2021-10-13 06:44:58,302 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:44:58,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:44:58,326 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 06:44:58,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 06:44:58,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 06:44:58,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 06:44:58,367 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2021-10-13 06:44:58,367 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2021-10-13 06:44:58,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 06:44:58,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 06:44:58,368 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2021-10-13 06:44:58,368 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2021-10-13 06:44:58,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 06:44:58,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 06:44:58,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 06:44:58,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 06:45:01,151 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 06:45:01,151 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-10-13 06:45:01,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:45:01 BoogieIcfgContainer [2021-10-13 06:45:01,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 06:45:01,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 06:45:01,155 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 06:45:01,161 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 06:45:01,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:44:57" (1/3) ... [2021-10-13 06:45:01,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d0c7b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:45:01, skipping insertion in model container [2021-10-13 06:45:01,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:44:58" (2/3) ... [2021-10-13 06:45:01,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d0c7b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:45:01, skipping insertion in model container [2021-10-13 06:45:01,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:45:01" (3/3) ... [2021-10-13 06:45:01,166 INFO L111 eAbstractionObserver]: Analyzing ICFG prefixsum_rec.c [2021-10-13 06:45:01,174 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 06:45:01,175 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 06:45:01,229 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 06:45:01,234 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 06:45:01,234 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 06:45:01,251 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 18 states have internal predecessors, (22), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-13 06:45:01,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 06:45:01,257 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:45:01,258 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:45:01,258 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:45:01,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:45:01,264 INFO L82 PathProgramCache]: Analyzing trace with hash -704499375, now seen corresponding path program 1 times [2021-10-13 06:45:01,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:45:01,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104777533] [2021-10-13 06:45:01,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:45:01,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:45:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:45:01,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:01,542 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:45:01,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104777533] [2021-10-13 06:45:01,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104777533] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:45:01,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:45:01,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 06:45:01,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90065553] [2021-10-13 06:45:01,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 06:45:01,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:45:01,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 06:45:01,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 06:45:01,565 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 18 states have internal predecessors, (22), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 06:45:01,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:45:01,680 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2021-10-13 06:45:01,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 06:45:01,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-10-13 06:45:01,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:45:01,700 INFO L225 Difference]: With dead ends: 38 [2021-10-13 06:45:01,700 INFO L226 Difference]: Without dead ends: 25 [2021-10-13 06:45:01,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 06:45:01,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-13 06:45:01,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-10-13 06:45:01,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.3125) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-13 06:45:01,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2021-10-13 06:45:01,748 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 18 [2021-10-13 06:45:01,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:45:01,749 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2021-10-13 06:45:01,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 06:45:01,750 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2021-10-13 06:45:01,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 06:45:01,753 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:45:01,753 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:45:01,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 06:45:01,754 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:45:01,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:45:01,757 INFO L82 PathProgramCache]: Analyzing trace with hash -166638216, now seen corresponding path program 1 times [2021-10-13 06:45:01,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:45:01,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877511496] [2021-10-13 06:45:01,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:45:01,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:45:01,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:45:02,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:02,037 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:45:02,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877511496] [2021-10-13 06:45:02,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877511496] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 06:45:02,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77131426] [2021-10-13 06:45:02,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:45:02,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:45:02,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:45:02,048 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:45:02,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 06:45:02,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:45:02,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 06:45:02,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:45:02,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:02,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:45:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:02,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77131426] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:45:02,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [655751440] [2021-10-13 06:45:02,526 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2021-10-13 06:45:02,526 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 06:45:02,539 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 06:45:02,545 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 06:45:02,547 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 06:45:02,603 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:45:02,611 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 06:45:02,612 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:45:02,613 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 06:45:02,614 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 06:45:02,615 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:45:02,619 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 06:45:02,629 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 164 [2021-10-13 06:45:02,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:45:02,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:45:02,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:45:02,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-13 06:45:02,707 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:45:02,708 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 06:45:02,709 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:45:02,715 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 06:45:02,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 06:45:02,734 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-13 06:45:02,734 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:45:02,735 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-13 06:45:02,736 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:45:02,736 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-13 06:45:02,736 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-13 06:45:02,747 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-13 06:45:02,747 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:45:02,749 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-13 06:45:02,750 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:45:02,754 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-13 06:45:02,755 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-13 06:45:02,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:45:02,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:45:02,815 INFO L180 QuantifierPusher]: treesize reduction 8, result has 94.6 percent of original size [2021-10-13 06:45:02,819 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 141 [2021-10-13 06:45:02,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 06:45:02,820 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:435, output treesize:141 [2021-10-13 06:45:02,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 06:45:03,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:45:03,046 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_52| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 06:45:03,050 INFO L168 Benchmark]: Toolchain (without parser) took 5210.97 ms. Allocated memory was 109.1 MB in the beginning and 134.2 MB in the end (delta: 25.2 MB). Free memory was 74.4 MB in the beginning and 62.0 MB in the end (delta: 12.5 MB). Peak memory consumption was 37.4 MB. Max. memory is 16.1 GB. [2021-10-13 06:45:03,050 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 73.4 MB. Free memory was 32.8 MB in the beginning and 32.8 MB in the end (delta: 38.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:45:03,051 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.28 ms. Allocated memory is still 109.1 MB. Free memory was 74.3 MB in the beginning and 81.9 MB in the end (delta: -7.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 06:45:03,051 INFO L168 Benchmark]: Boogie Procedure Inliner took 70.22 ms. Allocated memory is still 109.1 MB. Free memory was 81.9 MB in the beginning and 80.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:45:03,052 INFO L168 Benchmark]: Boogie Preprocessor took 61.28 ms. Allocated memory is still 109.1 MB. Free memory was 80.3 MB in the beginning and 78.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:45:03,052 INFO L168 Benchmark]: RCFGBuilder took 2868.53 ms. Allocated memory is still 109.1 MB. Free memory was 78.8 MB in the beginning and 58.3 MB in the end (delta: 20.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-13 06:45:03,053 INFO L168 Benchmark]: TraceAbstraction took 1893.25 ms. Allocated memory was 109.1 MB in the beginning and 134.2 MB in the end (delta: 25.2 MB). Free memory was 57.8 MB in the beginning and 62.0 MB in the end (delta: -4.2 MB). Peak memory consumption was 23.3 MB. Max. memory is 16.1 GB. [2021-10-13 06:45:03,056 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 73.4 MB. Free memory was 32.8 MB in the beginning and 32.8 MB in the end (delta: 38.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 307.28 ms. Allocated memory is still 109.1 MB. Free memory was 74.3 MB in the beginning and 81.9 MB in the end (delta: -7.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 70.22 ms. Allocated memory is still 109.1 MB. Free memory was 81.9 MB in the beginning and 80.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 61.28 ms. Allocated memory is still 109.1 MB. Free memory was 80.3 MB in the beginning and 78.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 2868.53 ms. Allocated memory is still 109.1 MB. Free memory was 78.8 MB in the beginning and 58.3 MB in the end (delta: 20.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1893.25 ms. Allocated memory was 109.1 MB in the beginning and 134.2 MB in the end (delta: 25.2 MB). Free memory was 57.8 MB in the beginning and 62.0 MB in the end (delta: -4.2 MB). Peak memory consumption was 23.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_52| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_52|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 06:45:03,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 06:45:05,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 06:45:05,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 06:45:05,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 06:45:05,645 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 06:45:05,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 06:45:05,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 06:45:05,659 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 06:45:05,663 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 06:45:05,672 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 06:45:05,673 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 06:45:05,676 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 06:45:05,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 06:45:05,679 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 06:45:05,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 06:45:05,685 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 06:45:05,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 06:45:05,688 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 06:45:05,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 06:45:05,713 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 06:45:05,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 06:45:05,718 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 06:45:05,721 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 06:45:05,723 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 06:45:05,735 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 06:45:05,735 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 06:45:05,736 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 06:45:05,738 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 06:45:05,739 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 06:45:05,740 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 06:45:05,740 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 06:45:05,742 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 06:45:05,744 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 06:45:05,745 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 06:45:05,747 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 06:45:05,747 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 06:45:05,748 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 06:45:05,749 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 06:45:05,749 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 06:45:05,751 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 06:45:05,752 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 06:45:05,753 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 06:45:05,801 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 06:45:05,802 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 06:45:05,803 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 06:45:05,803 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 06:45:05,804 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 06:45:05,804 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 06:45:05,804 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 06:45:05,805 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 06:45:05,805 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 06:45:05,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 06:45:05,808 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 06:45:05,808 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 06:45:05,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 06:45:05,809 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 06:45:05,809 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 06:45:05,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 06:45:05,809 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 06:45:05,810 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 06:45:05,810 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 06:45:05,810 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 06:45:05,810 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 06:45:05,811 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 06:45:05,811 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 06:45:05,811 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 06:45:05,811 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 06:45:05,812 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 06:45:05,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:45:05,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 06:45:05,813 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 06:45:05,813 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 06:45:05,813 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 06:45:05,813 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 06:45:05,814 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 06:45:05,814 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 06:45:05,815 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 06:45:05,815 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_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b76114a9d678a678cbffe7e7ac6a1457b6f06d7b [2021-10-13 06:45:06,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 06:45:06,255 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 06:45:06,260 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 06:45:06,261 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 06:45:06,262 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 06:45:06,263 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/verifythis/prefixsum_rec.c [2021-10-13 06:45:06,339 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/data/bdf0e1e42/4f3f5613d07b4b7d99d29ed460045385/FLAG643b5ba12 [2021-10-13 06:45:06,940 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 06:45:06,940 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/sv-benchmarks/c/verifythis/prefixsum_rec.c [2021-10-13 06:45:06,949 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/data/bdf0e1e42/4f3f5613d07b4b7d99d29ed460045385/FLAG643b5ba12 [2021-10-13 06:45:07,282 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/data/bdf0e1e42/4f3f5613d07b4b7d99d29ed460045385 [2021-10-13 06:45:07,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 06:45:07,291 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 06:45:07,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 06:45:07,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 06:45:07,296 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 06:45:07,298 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:45:07" (1/1) ... [2021-10-13 06:45:07,299 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46bdb735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:07, skipping insertion in model container [2021-10-13 06:45:07,299 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:45:07" (1/1) ... [2021-10-13 06:45:07,308 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 06:45:07,332 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 06:45:07,468 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_fd19fd40-03e1-45e7-902e-88154f42bb7b/sv-benchmarks/c/verifythis/prefixsum_rec.c[525,538] [2021-10-13 06:45:07,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:45:07,557 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 06:45:07,575 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_fd19fd40-03e1-45e7-902e-88154f42bb7b/sv-benchmarks/c/verifythis/prefixsum_rec.c[525,538] [2021-10-13 06:45:07,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:45:07,610 INFO L208 MainTranslator]: Completed translation [2021-10-13 06:45:07,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:07 WrapperNode [2021-10-13 06:45:07,610 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 06:45:07,612 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 06:45:07,612 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 06:45:07,612 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 06:45:07,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:07" (1/1) ... [2021-10-13 06:45:07,631 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:07" (1/1) ... [2021-10-13 06:45:07,656 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 06:45:07,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 06:45:07,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 06:45:07,658 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 06:45:07,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:07" (1/1) ... [2021-10-13 06:45:07,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:07" (1/1) ... [2021-10-13 06:45:07,672 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:07" (1/1) ... [2021-10-13 06:45:07,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:07" (1/1) ... [2021-10-13 06:45:07,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:07" (1/1) ... [2021-10-13 06:45:07,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:07" (1/1) ... [2021-10-13 06:45:07,693 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:07" (1/1) ... [2021-10-13 06:45:07,697 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 06:45:07,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 06:45:07,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 06:45:07,699 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 06:45:07,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:07" (1/1) ... [2021-10-13 06:45:07,707 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:45:07,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:45:07,736 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 06:45:07,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 06:45:07,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 06:45:07,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 06:45:07,796 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2021-10-13 06:45:07,796 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2021-10-13 06:45:07,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 06:45:07,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 06:45:07,797 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2021-10-13 06:45:07,800 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2021-10-13 06:45:07,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 06:45:07,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 06:45:07,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 06:45:07,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 06:45:08,324 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 06:45:08,333 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-10-13 06:45:08,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:45:08 BoogieIcfgContainer [2021-10-13 06:45:08,336 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 06:45:08,337 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 06:45:08,337 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 06:45:08,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 06:45:08,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:45:07" (1/3) ... [2021-10-13 06:45:08,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ebf0636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:45:08, skipping insertion in model container [2021-10-13 06:45:08,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:45:07" (2/3) ... [2021-10-13 06:45:08,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ebf0636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:45:08, skipping insertion in model container [2021-10-13 06:45:08,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:45:08" (3/3) ... [2021-10-13 06:45:08,345 INFO L111 eAbstractionObserver]: Analyzing ICFG prefixsum_rec.c [2021-10-13 06:45:08,351 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 06:45:08,351 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 06:45:08,412 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 06:45:08,424 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 06:45:08,424 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 06:45:08,459 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 30 states have (on average 1.4) internal successors, (42), 33 states have internal predecessors, (42), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-13 06:45:08,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 06:45:08,466 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:45:08,467 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:45:08,468 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:45:08,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:45:08,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1112089738, now seen corresponding path program 1 times [2021-10-13 06:45:08,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:45:08,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940991286] [2021-10-13 06:45:08,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:45:08,491 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:45:08,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:45:08,496 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:45:08,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 06:45:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:45:08,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 06:45:08,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:45:08,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:08,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:45:08,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:08,884 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:45:08,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940991286] [2021-10-13 06:45:08,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940991286] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:45:08,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:45:08,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 06:45:08,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983972024] [2021-10-13 06:45:08,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 06:45:08,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:45:08,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 06:45:08,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 06:45:08,908 INFO L87 Difference]: Start difference. First operand has 40 states, 30 states have (on average 1.4) internal successors, (42), 33 states have internal predecessors, (42), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-13 06:45:08,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:45:08,932 INFO L93 Difference]: Finished difference Result 77 states and 104 transitions. [2021-10-13 06:45:08,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 06:45:08,933 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-10-13 06:45:08,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:45:08,941 INFO L225 Difference]: With dead ends: 77 [2021-10-13 06:45:08,941 INFO L226 Difference]: Without dead ends: 36 [2021-10-13 06:45:08,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 06:45:08,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-13 06:45:08,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-13 06:45:08,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-13 06:45:08,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2021-10-13 06:45:08,984 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 28 [2021-10-13 06:45:08,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:45:08,984 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2021-10-13 06:45:08,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-13 06:45:08,985 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2021-10-13 06:45:08,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 06:45:08,987 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:45:08,988 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:45:09,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 06:45:09,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:45:09,203 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:45:09,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:45:09,204 INFO L82 PathProgramCache]: Analyzing trace with hash -627348298, now seen corresponding path program 1 times [2021-10-13 06:45:09,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:45:09,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [168352977] [2021-10-13 06:45:09,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:45:09,206 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:45:09,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:45:09,207 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:45:09,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 06:45:09,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:45:09,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 06:45:09,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:45:09,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:09,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:45:09,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:09,895 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:45:09,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [168352977] [2021-10-13 06:45:09,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [168352977] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:45:09,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:45:09,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-10-13 06:45:09,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637134822] [2021-10-13 06:45:09,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 06:45:09,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:45:09,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 06:45:09,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-13 06:45:09,900 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-13 06:45:10,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:45:10,227 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2021-10-13 06:45:10,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 06:45:10,229 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-10-13 06:45:10,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:45:10,230 INFO L225 Difference]: With dead ends: 68 [2021-10-13 06:45:10,230 INFO L226 Difference]: Without dead ends: 37 [2021-10-13 06:45:10,232 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 285.8ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-10-13 06:45:10,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-13 06:45:10,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-10-13 06:45:10,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-13 06:45:10,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2021-10-13 06:45:10,241 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 28 [2021-10-13 06:45:10,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:45:10,242 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2021-10-13 06:45:10,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-13 06:45:10,242 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2021-10-13 06:45:10,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 06:45:10,244 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:45:10,244 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:45:10,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 06:45:10,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:45:10,449 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:45:10,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:45:10,450 INFO L82 PathProgramCache]: Analyzing trace with hash 570671913, now seen corresponding path program 1 times [2021-10-13 06:45:10,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:45:10,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [684969740] [2021-10-13 06:45:10,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:45:10,456 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:45:10,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:45:10,457 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:45:10,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 06:45:10,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:45:10,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 06:45:10,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:45:11,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:11,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:45:11,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:11,296 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:45:11,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [684969740] [2021-10-13 06:45:11,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [684969740] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:45:11,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1705173312] [2021-10-13 06:45:11,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:45:11,297 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:45:11,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:45:11,299 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:45:11,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-13 06:45:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:45:11,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 06:45:11,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:45:11,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:11,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:45:11,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 06:45:11,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1705173312] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 06:45:11,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-13 06:45:11,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 8, 7] total 24 [2021-10-13 06:45:11,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463790490] [2021-10-13 06:45:11,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 06:45:11,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:45:11,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 06:45:11,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-10-13 06:45:11,962 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 06:45:12,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:45:12,097 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2021-10-13 06:45:12,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 06:45:12,098 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2021-10-13 06:45:12,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:45:12,099 INFO L225 Difference]: With dead ends: 49 [2021-10-13 06:45:12,100 INFO L226 Difference]: Without dead ends: 38 [2021-10-13 06:45:12,100 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 479.5ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-10-13 06:45:12,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-13 06:45:12,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-10-13 06:45:12,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-13 06:45:12,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-10-13 06:45:12,112 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 29 [2021-10-13 06:45:12,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:45:12,113 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-10-13 06:45:12,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 06:45:12,113 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-10-13 06:45:12,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-13 06:45:12,115 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:45:12,115 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:45:12,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-13 06:45:12,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 06:45:12,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:45:12,529 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:45:12,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:45:12,530 INFO L82 PathProgramCache]: Analyzing trace with hash -4790553, now seen corresponding path program 1 times [2021-10-13 06:45:12,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:45:12,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533206092] [2021-10-13 06:45:12,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:45:12,531 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:45:12,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:45:12,532 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:45:12,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 06:45:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:45:12,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 06:45:12,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:45:13,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:13,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:45:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:13,423 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:45:13,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1533206092] [2021-10-13 06:45:13,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1533206092] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:45:13,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1861203733] [2021-10-13 06:45:13,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:45:13,424 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:45:13,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:45:13,425 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:45:13,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-13 06:45:13,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:45:13,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 06:45:13,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:45:13,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:13,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:45:14,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:14,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1861203733] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:45:14,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106627309] [2021-10-13 06:45:14,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:45:14,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:45:14,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:45:14,189 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:45:14,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 06:45:14,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:45:14,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 06:45:14,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:45:14,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:14,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:45:15,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:45:15,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106627309] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:45:15,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 06:45:15,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7, 7, 9, 10] total 33 [2021-10-13 06:45:15,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796839626] [2021-10-13 06:45:15,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-13 06:45:15,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:45:15,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-13 06:45:15,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 06:45:15,028 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-13 06:45:16,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:45:16,503 INFO L93 Difference]: Finished difference Result 93 states and 117 transitions. [2021-10-13 06:45:16,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 06:45:16,504 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2021-10-13 06:45:16,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:45:16,506 INFO L225 Difference]: With dead ends: 93 [2021-10-13 06:45:16,506 INFO L226 Difference]: Without dead ends: 70 [2021-10-13 06:45:16,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1697.5ms TimeCoverageRelationStatistics Valid=685, Invalid=1865, Unknown=0, NotChecked=0, Total=2550 [2021-10-13 06:45:16,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-13 06:45:16,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 44. [2021-10-13 06:45:16,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 37 states have internal predecessors, (41), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-13 06:45:16,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2021-10-13 06:45:16,531 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 31 [2021-10-13 06:45:16,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:45:16,532 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2021-10-13 06:45:16,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-13 06:45:16,537 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2021-10-13 06:45:16,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 06:45:16,539 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:45:16,540 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:45:16,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 06:45:16,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 06:45:16,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-13 06:45:17,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 06:45:17,154 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:45:17,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:45:17,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1026560805, now seen corresponding path program 2 times [2021-10-13 06:45:17,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:45:17,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [204661345] [2021-10-13 06:45:17,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 06:45:17,156 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:45:17,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:45:17,157 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:45:17,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 06:45:17,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 06:45:17,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:45:17,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-13 06:45:17,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:45:18,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 06:45:19,527 INFO L354 Elim1Store]: treesize reduction 66, result has 17.5 percent of original size [2021-10-13 06:45:19,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 43 [2021-10-13 06:45:20,701 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-10-13 06:45:20,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 34 [2021-10-13 06:45:20,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 06:45:20,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:45:25,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2021-10-13 06:45:25,776 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-10-13 06:45:25,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 229 treesize of output 207 [2021-10-13 06:45:32,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 06:45:32,203 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:45:32,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [204661345] [2021-10-13 06:45:32,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [204661345] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:45:32,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:45:32,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15, 13] imperfect sequences [] total 26 [2021-10-13 06:45:32,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051574882] [2021-10-13 06:45:32,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 06:45:32,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:45:32,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 06:45:32,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-10-13 06:45:32,206 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 26 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 20 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 06:45:51,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:45:51,609 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2021-10-13 06:45:51,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 06:45:51,613 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 20 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 33 [2021-10-13 06:45:51,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:45:51,616 INFO L225 Difference]: With dead ends: 74 [2021-10-13 06:45:51,616 INFO L226 Difference]: Without dead ends: 72 [2021-10-13 06:45:51,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 23874.8ms TimeCoverageRelationStatistics Valid=250, Invalid=1310, Unknown=0, NotChecked=0, Total=1560 [2021-10-13 06:45:51,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-13 06:45:51,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 54. [2021-10-13 06:45:51,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 43 states have internal predecessors, (48), 7 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (14), 8 states have call predecessors, (14), 7 states have call successors, (14) [2021-10-13 06:45:51,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2021-10-13 06:45:51,631 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 33 [2021-10-13 06:45:51,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:45:51,632 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2021-10-13 06:45:51,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 20 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 06:45:51,632 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2021-10-13 06:45:51,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-13 06:45:51,635 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:45:51,636 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:45:51,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 06:45:51,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:45:51,841 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:45:51,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:45:51,841 INFO L82 PathProgramCache]: Analyzing trace with hash 976759516, now seen corresponding path program 1 times [2021-10-13 06:45:51,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:45:51,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1700329468] [2021-10-13 06:45:51,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:45:51,843 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:45:51,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:45:51,849 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:45:51,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 06:45:52,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:45:52,182 WARN L261 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 68 conjunts are in the unsatisfiable core [2021-10-13 06:45:52,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:45:52,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 06:45:52,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-10-13 06:45:52,761 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 06:45:52,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-10-13 06:45:52,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-10-13 06:45:52,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-10-13 06:45:53,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-10-13 06:45:53,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 54 [2021-10-13 06:45:53,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-10-13 06:45:55,972 WARN L860 $PredicateComparison]: unable to prove that (exists ((downsweep_~tmp~0 (_ BitVec 32))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_downsweep_#in~a.base| (let ((.cse2 (bvadd (bvmul |c_downsweep_#in~left| (_ bv4 32)) |c_downsweep_#in~a.offset|))) (store (let ((.cse0 (select |c_old(#memory_int)| |c_downsweep_#in~a.base|)) (.cse1 (bvadd (bvmul |c_downsweep_#in~right| (_ bv4 32)) |c_downsweep_#in~a.offset|))) (store .cse0 .cse1 (bvadd (select .cse0 .cse2) (select .cse0 .cse1)))) .cse2 downsweep_~tmp~0))))) is different from true [2021-10-13 06:45:56,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 74 [2021-10-13 06:46:06,227 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 06:46:06,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 87 [2021-10-13 06:46:06,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:46:06,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:46:54,724 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_#t~malloc19.base_13| (_ BitVec 32)) (v_downsweep_~tmp~0_29 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc19.base_13|)))) (let ((.cse1 (bvadd |c_ULTIMATE.start_main_#t~malloc18.offset| (_ bv4 32)))) (let ((.cse2 (store |c_#memory_int| |v_ULTIMATE.start_main_#t~malloc19.base_13| (let ((.cse6 (let ((.cse7 ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)))) (store .cse7 (_ bv0 32) (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_#t~malloc19.base_13| .cse7) |c_ULTIMATE.start_main_#t~malloc18.base|) |c_ULTIMATE.start_main_#t~malloc18.offset|))))) (store .cse6 (_ bv4 32) (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_#t~malloc19.base_13| .cse6) |c_ULTIMATE.start_main_#t~malloc18.base|) .cse1)))))) (let ((.cse0 (let ((.cse5 (bvadd (_ bv4294967292 32) |c_ULTIMATE.start_main_#t~malloc18.offset| (bvmul (bvsdiv c_ULTIMATE.start_main_~n~0 (_ bv2 32)) (_ bv4 32))))) (store (let ((.cse3 (select .cse2 |c_ULTIMATE.start_main_#t~malloc18.base|)) (.cse4 (bvadd (_ bv4294967292 32) |c_ULTIMATE.start_main_#t~malloc18.offset| (bvmul c_ULTIMATE.start_main_~n~0 (_ bv4 32))))) (store .cse3 .cse4 (select (store .cse3 .cse4 (_ bv0 32)) .cse5))) .cse5 v_downsweep_~tmp~0_29)))) (= (select .cse0 .cse1) (select (select (store .cse2 |c_ULTIMATE.start_main_#t~malloc18.base| .cse0) |v_ULTIMATE.start_main_#t~malloc19.base_13|) (_ bv0 32)))))))) is different from false [2021-10-13 06:46:54,802 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:46:54,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1700329468] [2021-10-13 06:46:54,802 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Undeclared function symbol (ite Bool (_ BitVec 32) (Array (_ BitVec 32) (_ BitVec 32))) [2021-10-13 06:46:54,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [922475853] [2021-10-13 06:46:54,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:46:54,803 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:46:54,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:46:54,804 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:46:54,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-13 06:46:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:46:55,344 WARN L261 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 66 conjunts are in the unsatisfiable core [2021-10-13 06:46:55,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:46:55,370 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@40807f [2021-10-13 06:46:55,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490743705] [2021-10-13 06:46:55,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:46:55,371 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:46:55,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:46:55,389 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:46:55,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 06:46:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:46:55,804 WARN L261 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 73 conjunts are in the unsatisfiable core [2021-10-13 06:46:55,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:46:56,034 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@40807f [2021-10-13 06:46:56,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:46:56,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-13 06:46:56,035 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-13 06:46:56,035 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-13 06:46:56,051 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 06:46:56,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-10-13 06:46:56,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 06:46:56,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 06:46:56,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd19fd40-03e1-45e7-902e-88154f42bb7b/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:46:56,661 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 06:46:56,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 06:46:56 BoogieIcfgContainer [2021-10-13 06:46:56,686 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 06:46:56,687 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 06:46:56,687 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 06:46:56,687 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 06:46:56,688 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:45:08" (3/4) ... [2021-10-13 06:46:56,691 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 06:46:56,691 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 06:46:56,692 INFO L168 Benchmark]: Toolchain (without parser) took 109400.79 ms. Allocated memory was 54.5 MB in the beginning and 83.9 MB in the end (delta: 29.4 MB). Free memory was 31.0 MB in the beginning and 54.2 MB in the end (delta: -23.2 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.1 GB. [2021-10-13 06:46:56,693 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 54.5 MB. Free memory was 35.2 MB in the beginning and 35.2 MB in the end (delta: 38.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:46:56,694 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.34 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 30.8 MB in the beginning and 48.4 MB in the end (delta: -17.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 16.1 GB. [2021-10-13 06:46:56,694 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.90 ms. Allocated memory is still 67.1 MB. Free memory was 48.4 MB in the beginning and 46.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:46:56,695 INFO L168 Benchmark]: Boogie Preprocessor took 40.03 ms. Allocated memory is still 67.1 MB. Free memory was 46.7 MB in the beginning and 45.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:46:56,697 INFO L168 Benchmark]: RCFGBuilder took 637.59 ms. Allocated memory is still 67.1 MB. Free memory was 45.0 MB in the beginning and 46.3 MB in the end (delta: -1.2 MB). Peak memory consumption was 14.5 MB. Max. memory is 16.1 GB. [2021-10-13 06:46:56,697 INFO L168 Benchmark]: TraceAbstraction took 108348.93 ms. Allocated memory was 67.1 MB in the beginning and 83.9 MB in the end (delta: 16.8 MB). Free memory was 45.8 MB in the beginning and 54.9 MB in the end (delta: -9.1 MB). Peak memory consumption was 47.4 MB. Max. memory is 16.1 GB. [2021-10-13 06:46:56,698 INFO L168 Benchmark]: Witness Printer took 4.22 ms. Allocated memory is still 83.9 MB. Free memory was 54.9 MB in the beginning and 54.2 MB in the end (delta: 711.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:46:56,701 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 54.5 MB. Free memory was 35.2 MB in the beginning and 35.2 MB in the end (delta: 38.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 318.34 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 30.8 MB in the beginning and 48.4 MB in the end (delta: -17.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.90 ms. Allocated memory is still 67.1 MB. Free memory was 48.4 MB in the beginning and 46.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.03 ms. Allocated memory is still 67.1 MB. Free memory was 46.7 MB in the beginning and 45.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 637.59 ms. Allocated memory is still 67.1 MB. Free memory was 45.0 MB in the beginning and 46.3 MB in the end (delta: -1.2 MB). Peak memory consumption was 14.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 108348.93 ms. Allocated memory was 67.1 MB in the beginning and 83.9 MB in the end (delta: 16.8 MB). Free memory was 45.8 MB in the beginning and 54.9 MB in the end (delta: -9.1 MB). Peak memory consumption was 47.4 MB. Max. memory is 16.1 GB. * Witness Printer took 4.22 ms. Allocated memory is still 83.9 MB. Free memory was 54.9 MB in the beginning and 54.2 MB in the end (delta: 711.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L52] int n = __VERIFIER_nondet_int(); [L6] COND FALSE !(!cond) [L38] COND TRUE ((x % 2) == 0) && x > 1 [L39] x /= 2 [L38] COND FALSE !(((x % 2) == 0) && x > 1) [L40] return (x == 1); [L6] COND FALSE !(!cond) [L56] int *a = calloc(n, sizeof(int)); [L58] int *a0 = calloc(n, sizeof(int)); [L59] int i; [L60] i=0 [L60] COND TRUE i left+1) [L22] EXPR a[left] [L22] EXPR a[right] [L22] a[right] = a[left]+a[right] [L63] RET upsweep(a, n/2-1, n-1) [L64] a[n-1] = 0 [L65] CALL downsweep(a, n/2-1, n-1) [L26] EXPR a[right] [L26] int tmp = a[right]; [L27] EXPR a[right] [L27] EXPR a[left] [L27] a[right] = a[right] + a[left] [L28] a[left] = tmp [L29] COND FALSE !(right > left+1) [L65] RET downsweep(a, n/2-1, n-1) [L44] int i, sum = 0; [L45] i=0 [L45] COND TRUE i