./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51033e63-99db-424a-9d83-d9b43e3a239b/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51033e63-99db-424a-9d83-d9b43e3a239b/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51033e63-99db-424a-9d83-d9b43e3a239b/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51033e63-99db-424a-9d83-d9b43e3a239b/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51033e63-99db-424a-9d83-d9b43e3a239b/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51033e63-99db-424a-9d83-d9b43e3a239b/bin/utaipan-EQgc7hIp5V --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 3a80fea07b3dad363ac033c87feb8bfcf28a57d2e75bc95b67f90908b133efe1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:36:58,368 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:36:58,372 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:36:58,443 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:36:58,444 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:36:58,446 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:36:58,448 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:36:58,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:36:58,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:36:58,460 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:36:58,461 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:36:58,465 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:36:58,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:36:58,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:36:58,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:36:58,482 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:36:58,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:36:58,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:36:58,497 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:36:58,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:36:58,507 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:36:58,509 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:36:58,514 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:36:58,516 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:36:58,524 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:36:58,524 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:36:58,525 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:36:58,527 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:36:58,528 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:36:58,530 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:36:58,531 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:36:58,532 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:36:58,534 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:36:58,536 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:36:58,538 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:36:58,538 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:36:58,539 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:36:58,540 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:36:58,540 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:36:58,541 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:36:58,542 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:36:58,543 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51033e63-99db-424a-9d83-d9b43e3a239b/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:36:58,598 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:36:58,599 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:36:58,600 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:36:58,600 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:36:58,609 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:36:58,610 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:36:58,610 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:36:58,610 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:36:58,611 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:36:58,611 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:36:58,613 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:36:58,613 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:36:58,613 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:36:58,614 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:36:58,614 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:36:58,614 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:36:58,615 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:36:58,615 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:36:58,617 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:36:58,617 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:36:58,617 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:36:58,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:36:58,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:36:58,618 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:36:58,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:36:58,619 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:36:58,621 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:36:58,621 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:36:58,621 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:36:58,622 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:36:58,622 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:36:58,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:36:58,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:36:58,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:36:58,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:36:58,624 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:36:58,624 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:36:58,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:36:58,625 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:36:58,625 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:36:58,625 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:36:58,625 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_51033e63-99db-424a-9d83-d9b43e3a239b/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51033e63-99db-424a-9d83-d9b43e3a239b/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a80fea07b3dad363ac033c87feb8bfcf28a57d2e75bc95b67f90908b133efe1 [2021-11-23 03:36:58,986 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:36:59,011 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:36:59,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:36:59,016 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:36:59,017 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:36:59,019 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51033e63-99db-424a-9d83-d9b43e3a239b/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2021-11-23 03:36:59,105 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51033e63-99db-424a-9d83-d9b43e3a239b/bin/utaipan-EQgc7hIp5V/data/a872f6cbc/896f2c3750bd406c80e7b3f86dc5a7bf/FLAGaf8e8c548 [2021-11-23 03:36:59,696 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:36:59,697 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51033e63-99db-424a-9d83-d9b43e3a239b/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2021-11-23 03:36:59,705 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51033e63-99db-424a-9d83-d9b43e3a239b/bin/utaipan-EQgc7hIp5V/data/a872f6cbc/896f2c3750bd406c80e7b3f86dc5a7bf/FLAGaf8e8c548 [2021-11-23 03:37:00,013 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51033e63-99db-424a-9d83-d9b43e3a239b/bin/utaipan-EQgc7hIp5V/data/a872f6cbc/896f2c3750bd406c80e7b3f86dc5a7bf [2021-11-23 03:37:00,018 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:37:00,020 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:37:00,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:37:00,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:37:00,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:37:00,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:37:00" (1/1) ... [2021-11-23 03:37:00,033 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e0bdc04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:00, skipping insertion in model container [2021-11-23 03:37:00,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:37:00" (1/1) ... [2021-11-23 03:37:00,042 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:37:00,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:37:00,275 WARN L230 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_51033e63-99db-424a-9d83-d9b43e3a239b/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c[502,515] [2021-11-23 03:37:00,300 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:37:00,314 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:37:00,329 WARN L230 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_51033e63-99db-424a-9d83-d9b43e3a239b/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c[502,515] [2021-11-23 03:37:00,341 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:37:00,356 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:37:00,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:00 WrapperNode [2021-11-23 03:37:00,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:37:00,358 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:37:00,358 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:37:00,359 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:37:00,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:00" (1/1) ... [2021-11-23 03:37:00,388 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:00" (1/1) ... [2021-11-23 03:37:00,420 INFO L137 Inliner]: procedures = 19, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 36 [2021-11-23 03:37:00,421 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:37:00,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:37:00,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:37:00,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:37:00,431 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:00" (1/1) ... [2021-11-23 03:37:00,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:00" (1/1) ... [2021-11-23 03:37:00,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:00" (1/1) ... [2021-11-23 03:37:00,435 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:00" (1/1) ... [2021-11-23 03:37:00,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:00" (1/1) ... [2021-11-23 03:37:00,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:00" (1/1) ... [2021-11-23 03:37:00,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:00" (1/1) ... [2021-11-23 03:37:00,450 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:37:00,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:37:00,451 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:37:00,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:37:00,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:00" (1/1) ... [2021-11-23 03:37:00,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:37:00,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51033e63-99db-424a-9d83-d9b43e3a239b/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:37:00,499 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51033e63-99db-424a-9d83-d9b43e3a239b/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:37:00,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51033e63-99db-424a-9d83-d9b43e3a239b/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:37:00,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:37:00,555 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 03:37:00,555 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 03:37:00,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:37:00,555 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-11-23 03:37:00,556 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-11-23 03:37:00,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:37:00,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:37:00,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:37:00,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:37:00,556 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 03:37:00,557 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 03:37:00,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:37:00,650 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:37:00,652 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:37:00,849 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:37:00,896 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:37:00,897 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 03:37:00,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:37:00 BoogieIcfgContainer [2021-11-23 03:37:00,900 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:37:00,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:37:00,903 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:37:00,907 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:37:00,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:37:00" (1/3) ... [2021-11-23 03:37:00,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19ab7749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:37:00, skipping insertion in model container [2021-11-23 03:37:00,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:00" (2/3) ... [2021-11-23 03:37:00,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19ab7749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:37:00, skipping insertion in model container [2021-11-23 03:37:00,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:37:00" (3/3) ... [2021-11-23 03:37:00,911 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec_onepoint.c [2021-11-23 03:37:00,918 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:37:00,918 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:37:00,977 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:37:00,986 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:37:00,987 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:37:01,008 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-23 03:37:01,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 03:37:01,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:37:01,016 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:37:01,017 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:37:01,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:37:01,024 INFO L85 PathProgramCache]: Analyzing trace with hash 280783553, now seen corresponding path program 1 times [2021-11-23 03:37:01,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:37:01,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082548795] [2021-11-23 03:37:01,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:01,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:37:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:37:01,531 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:37:01,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082548795] [2021-11-23 03:37:01,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082548795] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:37:01,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:37:01,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 03:37:01,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906917876] [2021-11-23 03:37:01,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:37:01,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:37:01,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:37:01,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:37:01,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:37:01,582 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:37:01,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:37:01,772 INFO L93 Difference]: Finished difference Result 69 states and 90 transitions. [2021-11-23 03:37:01,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:37:01,777 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2021-11-23 03:37:01,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:37:01,795 INFO L225 Difference]: With dead ends: 69 [2021-11-23 03:37:01,795 INFO L226 Difference]: Without dead ends: 44 [2021-11-23 03:37:01,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:37:01,809 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:37:01,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 120 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:37:01,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-23 03:37:01,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2021-11-23 03:37:01,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-23 03:37:01,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-11-23 03:37:01,893 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 16 [2021-11-23 03:37:01,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:37:01,894 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-11-23 03:37:01,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:37:01,894 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-11-23 03:37:01,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 03:37:01,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:37:01,897 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:37:01,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:37:01,911 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:37:01,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:37:01,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1492581818, now seen corresponding path program 1 times [2021-11-23 03:37:01,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:37:01,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397500203] [2021-11-23 03:37:01,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:01,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:37:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:02,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:37:02,048 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:37:02,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397500203] [2021-11-23 03:37:02,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397500203] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:37:02,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:37:02,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 03:37:02,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757202075] [2021-11-23 03:37:02,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:37:02,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:37:02,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:37:02,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:37:02,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:37:02,054 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:37:02,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:37:02,128 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2021-11-23 03:37:02,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:37:02,129 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2021-11-23 03:37:02,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:37:02,131 INFO L225 Difference]: With dead ends: 48 [2021-11-23 03:37:02,131 INFO L226 Difference]: Without dead ends: 37 [2021-11-23 03:37:02,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:37:02,134 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 5 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:37:02,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 126 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:37:02,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-23 03:37:02,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-23 03:37:02,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-23 03:37:02,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-11-23 03:37:02,149 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 19 [2021-11-23 03:37:02,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:37:02,150 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-11-23 03:37:02,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:37:02,151 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-11-23 03:37:02,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 03:37:02,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:37:02,152 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:37:02,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:37:02,153 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:37:02,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:37:02,154 INFO L85 PathProgramCache]: Analyzing trace with hash 334779519, now seen corresponding path program 1 times [2021-11-23 03:37:02,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:37:02,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534301132] [2021-11-23 03:37:02,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:02,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:37:02,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:02,522 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 03:37:02,522 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:37:02,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534301132] [2021-11-23 03:37:02,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534301132] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:37:02,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929880288] [2021-11-23 03:37:02,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:02,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:37:02,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51033e63-99db-424a-9d83-d9b43e3a239b/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:37:02,538 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51033e63-99db-424a-9d83-d9b43e3a239b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:37:02,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51033e63-99db-424a-9d83-d9b43e3a239b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:37:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:02,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 03:37:02,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:37:02,777 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 [2021-11-23 03:37:04,967 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_1 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_1))) is different from true [2021-11-23 03:37:07,062 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_2 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_2))) is different from true [2021-11-23 03:37:07,193 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 78 treesize of output 68 [2021-11-23 03:37:07,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2021-11-23 03:37:07,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:37:11,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929880288] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:37:11,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [255480023] [2021-11-23 03:37:11,815 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-23 03:37:11,816 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:37:11,822 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) 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:610) 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:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) 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) [2021-11-23 03:37:11,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:37:11,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 15 [2021-11-23 03:37:11,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849922716] [2021-11-23 03:37:11,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:37:11,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 03:37:11,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:37:11,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 03:37:11,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=200, Unknown=2, NotChecked=58, Total=306 [2021-11-23 03:37:11,829 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (11), 8 states have call predecessors, (11), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 03:37:20,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:37:20,199 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2021-11-23 03:37:20,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 03:37:20,200 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (11), 8 states have call predecessors, (11), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 28 [2021-11-23 03:37:20,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:37:20,203 INFO L225 Difference]: With dead ends: 47 [2021-11-23 03:37:20,203 INFO L226 Difference]: Without dead ends: 45 [2021-11-23 03:37:20,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=92, Invalid=418, Unknown=4, NotChecked=86, Total=600 [2021-11-23 03:37:20,205 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 20 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:37:20,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 143 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 141 Invalid, 0 Unknown, 75 Unchecked, 0.1s Time] [2021-11-23 03:37:20,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-23 03:37:20,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2021-11-23 03:37:20,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-23 03:37:20,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-11-23 03:37:20,219 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 28 [2021-11-23 03:37:20,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:37:20,220 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-11-23 03:37:20,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (11), 8 states have call predecessors, (11), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 03:37:20,221 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-11-23 03:37:20,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 03:37:20,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:37:20,222 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:37:20,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51033e63-99db-424a-9d83-d9b43e3a239b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:37:20,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51033e63-99db-424a-9d83-d9b43e3a239b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:37:20,424 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:37:20,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:37:20,424 INFO L85 PathProgramCache]: Analyzing trace with hash -270277431, now seen corresponding path program 1 times [2021-11-23 03:37:20,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:37:20,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034701036] [2021-11-23 03:37:20,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:20,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:37:20,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 03:37:20,565 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:37:20,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034701036] [2021-11-23 03:37:20,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034701036] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:37:20,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889328879] [2021-11-23 03:37:20,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:20,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:37:20,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51033e63-99db-424a-9d83-d9b43e3a239b/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:37:20,568 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51033e63-99db-424a-9d83-d9b43e3a239b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:37:20,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51033e63-99db-424a-9d83-d9b43e3a239b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:37:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:20,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 03:37:20,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:37:20,668 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 [2021-11-23 03:37:22,698 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_3 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_3))) is different from true [2021-11-23 03:37:24,734 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_4 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_4))) is different from true [2021-11-23 03:37:26,767 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_5 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_5))) is different from true [2021-11-23 03:37:26,809 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 29 treesize of output 23 [2021-11-23 03:37:26,929 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2021-11-23 03:37:26,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:37:29,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889328879] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:37:29,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [326434327] [2021-11-23 03:37:29,038 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-23 03:37:29,038 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:37:29,039 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) 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:610) 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:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) 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) [2021-11-23 03:37:29,041 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:37:29,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 14 [2021-11-23 03:37:29,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676489177] [2021-11-23 03:37:29,042 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:37:29,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:37:29,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:37:29,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:37:29,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=129, Unknown=4, NotChecked=72, Total=240 [2021-11-23 03:37:29,044 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 14 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (11), 7 states have call predecessors, (11), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 03:37:29,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:37:29,181 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-11-23 03:37:29,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 03:37:29,184 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (11), 7 states have call predecessors, (11), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 31 [2021-11-23 03:37:29,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:37:29,188 INFO L225 Difference]: With dead ends: 45 [2021-11-23 03:37:29,188 INFO L226 Difference]: Without dead ends: 0 [2021-11-23 03:37:29,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=53, Invalid=195, Unknown=4, NotChecked=90, Total=342 [2021-11-23 03:37:29,196 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 19 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:37:29,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 121 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 119 Unchecked, 0.1s Time] [2021-11-23 03:37:29,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-23 03:37:29,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-23 03:37:29,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:37:29,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-23 03:37:29,201 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2021-11-23 03:37:29,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:37:29,201 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-23 03:37:29,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (11), 7 states have call predecessors, (11), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 03:37:29,202 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-23 03:37:29,202 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-23 03:37:29,204 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 03:37:29,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51033e63-99db-424a-9d83-d9b43e3a239b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:37:29,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51033e63-99db-424a-9d83-d9b43e3a239b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:37:29,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-23 03:37:31,809 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-23 03:37:31,809 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-23 03:37:31,809 INFO L854 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (and (= |ULTIMATE.start_main_~ax~1#1| 0) (= ((as const (Array Int Int)) 0) (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|)) (= |ULTIMATE.start_main_~ai~1#1| 0)) [2021-11-23 03:37:31,810 INFO L861 garLoopResultBuilder]: At program point L50-1(line 50) the Hoare annotation is: true [2021-11-23 03:37:31,810 INFO L854 garLoopResultBuilder]: At program point L47(line 47) the Hoare annotation is: (= ((as const (Array Int Int)) 0) (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|)) [2021-11-23 03:37:31,810 INFO L858 garLoopResultBuilder]: For program point L47-1(line 47) no Hoare annotation was computed. [2021-11-23 03:37:31,810 INFO L861 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: true [2021-11-23 03:37:31,810 INFO L858 garLoopResultBuilder]: For program point L45-1(line 45) no Hoare annotation was computed. [2021-11-23 03:37:31,810 INFO L861 garLoopResultBuilder]: At program point L42(line 42) the Hoare annotation is: true [2021-11-23 03:37:31,811 INFO L858 garLoopResultBuilder]: For program point L42-1(line 42) no Hoare annotation was computed. [2021-11-23 03:37:31,811 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-11-23 03:37:31,811 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-11-23 03:37:31,811 INFO L861 garLoopResultBuilder]: At program point checkENTRY(lines 16 38) the Hoare annotation is: true [2021-11-23 03:37:31,811 INFO L858 garLoopResultBuilder]: For program point L29(line 29) no Hoare annotation was computed. [2021-11-23 03:37:31,812 INFO L854 garLoopResultBuilder]: At program point L26-2(lines 26 27) the Hoare annotation is: (let ((.cse3 ((as const (Array Int Int)) 0))) (let ((.cse0 (not (= .cse3 (select |#memory_int| |check_#in~a.base|)))) (.cse1 (and (<= (+ check_~y 1) check_~n) (= .cse3 (select |#memory_int| check_~a.base)) (<= 1 check_~x))) (.cse2 (not (<= (+ |check_#in~y| 1) |check_#in~n|)))) (and (or .cse0 .cse1 (not (= |check_#in~x| 0)) .cse2) (or .cse0 (not (<= 1 |check_#in~x|)) .cse1 .cse2)))) [2021-11-23 03:37:31,812 INFO L858 garLoopResultBuilder]: For program point L21(line 21) no Hoare annotation was computed. [2021-11-23 03:37:31,812 INFO L854 garLoopResultBuilder]: At program point L20(line 20) the Hoare annotation is: (let ((.cse4 ((as const (Array Int Int)) 0))) (let ((.cse0 (not (= .cse4 (select |#memory_int| |check_#in~a.base|)))) (.cse1 (<= (+ check_~y 1) check_~n)) (.cse2 (= .cse4 (select |#memory_int| check_~a.base))) (.cse3 (not (<= (+ |check_#in~y| 1) |check_#in~n|)))) (and (or .cse0 (not (= |check_#in~x| 0)) (and (= check_~x 0) .cse1 .cse2) .cse3) (or .cse0 (not (<= 1 |check_#in~x|)) (and .cse1 .cse2 (<= 1 check_~x)) .cse3)))) [2021-11-23 03:37:31,812 INFO L854 garLoopResultBuilder]: At program point L20-1(line 20) the Hoare annotation is: (let ((.cse4 ((as const (Array Int Int)) 0))) (let ((.cse0 (not (= .cse4 (select |#memory_int| |check_#in~a.base|)))) (.cse2 (<= (+ check_~y 1) check_~n)) (.cse3 (= .cse4 (select |#memory_int| check_~a.base))) (.cse1 (not (<= (+ |check_#in~y| 1) |check_#in~n|)))) (and (or .cse0 (not (<= 1 |check_#in~x|)) .cse1 (and (<= 0 check_~x) .cse2 .cse3)) (or .cse0 (not (= |check_#in~x| 0)) (and (= check_~x 0) .cse2 .cse3) .cse1)))) [2021-11-23 03:37:31,813 INFO L858 garLoopResultBuilder]: For program point checkEXIT(lines 16 38) no Hoare annotation was computed. [2021-11-23 03:37:31,813 INFO L858 garLoopResultBuilder]: For program point L17(line 17) no Hoare annotation was computed. [2021-11-23 03:37:31,813 INFO L858 garLoopResultBuilder]: For program point checkFINAL(lines 16 38) no Hoare annotation was computed. [2021-11-23 03:37:31,813 INFO L854 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse3 ((as const (Array Int Int)) 0))) (let ((.cse0 (not (= .cse3 (select |#memory_int| |check_#in~a.base|)))) (.cse1 (not (<= (+ |check_#in~y| 1) |check_#in~n|))) (.cse2 (and (= check_~ai~0 0) (<= (+ check_~y 1) check_~n) (= .cse3 (select |#memory_int| check_~a.base)) (<= 1 check_~x) (= check_~ax~0 0)))) (and (or .cse0 (not (= |check_#in~x| 0)) .cse1 .cse2) (or .cse0 (not (<= 1 |check_#in~x|)) .cse1 .cse2)))) [2021-11-23 03:37:31,813 INFO L858 garLoopResultBuilder]: For program point L35-1(line 35) no Hoare annotation was computed. [2021-11-23 03:37:31,813 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 10 12) the Hoare annotation is: true [2021-11-23 03:37:31,814 INFO L858 garLoopResultBuilder]: For program point L11(line 11) no Hoare annotation was computed. [2021-11-23 03:37:31,814 INFO L858 garLoopResultBuilder]: For program point L11-1(line 11) no Hoare annotation was computed. [2021-11-23 03:37:31,814 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 10 12) no Hoare annotation was computed. [2021-11-23 03:37:31,814 INFO L858 garLoopResultBuilder]: For program point L11-3(lines 10 12) no Hoare annotation was computed. [2021-11-23 03:37:31,814 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 11) no Hoare annotation was computed. [2021-11-23 03:37:31,819 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-11-23 03:37:31,821 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 03:37:31,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:37:31 BoogieIcfgContainer [2021-11-23 03:37:31,831 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 03:37:31,832 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 03:37:31,832 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 03:37:31,832 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 03:37:31,833 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:37:00" (3/4) ... [2021-11-23 03:37:31,837 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-23 03:37:31,844 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-11-23 03:37:31,844 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2021-11-23 03:37:31,844 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-11-23 03:37:31,851 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 25 nodes and edges [2021-11-23 03:37:31,852 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-11-23 03:37:31,852 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-23 03:37:31,852 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-23 03:37:31,898 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51033e63-99db-424a-9d83-d9b43e3a239b/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 03:37:31,898 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 03:37:31,899 INFO L158 Benchmark]: Toolchain (without parser) took 31878.76ms. Allocated memory was 109.1MB in the beginning and 153.1MB in the end (delta: 44.0MB). Free memory was 70.5MB in the beginning and 99.9MB in the end (delta: -29.5MB). Peak memory consumption was 15.2MB. Max. memory is 16.1GB. [2021-11-23 03:37:31,900 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 109.1MB. Free memory is still 86.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:37:31,900 INFO L158 Benchmark]: CACSL2BoogieTranslator took 334.17ms. Allocated memory is still 109.1MB. Free memory was 70.3MB in the beginning and 82.3MB in the end (delta: -11.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 03:37:31,901 INFO L158 Benchmark]: Boogie Procedure Inliner took 62.58ms. Allocated memory is still 109.1MB. Free memory was 82.3MB in the beginning and 80.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:37:31,901 INFO L158 Benchmark]: Boogie Preprocessor took 29.01ms. Allocated memory is still 109.1MB. Free memory was 80.7MB in the beginning and 79.7MB in the end (delta: 929.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:37:31,902 INFO L158 Benchmark]: RCFGBuilder took 449.08ms. Allocated memory is still 109.1MB. Free memory was 79.7MB in the beginning and 67.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 03:37:31,902 INFO L158 Benchmark]: TraceAbstraction took 30928.63ms. Allocated memory was 109.1MB in the beginning and 153.1MB in the end (delta: 44.0MB). Free memory was 66.7MB in the beginning and 103.1MB in the end (delta: -36.4MB). Peak memory consumption was 9.5MB. Max. memory is 16.1GB. [2021-11-23 03:37:31,903 INFO L158 Benchmark]: Witness Printer took 66.72ms. Allocated memory is still 153.1MB. Free memory was 103.1MB in the beginning and 99.9MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 03:37:31,905 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 109.1MB. Free memory is still 86.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 334.17ms. Allocated memory is still 109.1MB. Free memory was 70.3MB in the beginning and 82.3MB in the end (delta: -11.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 62.58ms. Allocated memory is still 109.1MB. Free memory was 82.3MB in the beginning and 80.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.01ms. Allocated memory is still 109.1MB. Free memory was 80.7MB in the beginning and 79.7MB in the end (delta: 929.2kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 449.08ms. Allocated memory is still 109.1MB. Free memory was 79.7MB in the beginning and 67.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 30928.63ms. Allocated memory was 109.1MB in the beginning and 153.1MB in the end (delta: 44.0MB). Free memory was 66.7MB in the beginning and 103.1MB in the end (delta: -36.4MB). Peak memory consumption was 9.5MB. Max. memory is 16.1GB. * Witness Printer took 66.72ms. Allocated memory is still 153.1MB. Free memory was 103.1MB in the beginning and 99.9MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 11]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 30.8s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 8.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 61 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 59 mSDsluCounter, 510 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 194 IncrementalHoareTripleChecker+Unchecked, 489 mSDsCounter, 20 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 320 IncrementalHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20 mSolverCounterUnsat, 91 mSDtfsCounter, 320 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 120 GetRequests, 60 SyntacticMatches, 8 SemanticMatches, 52 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 24.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=3, InterpolantAutomatonStates: 39, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 38 PreInvPairs, 49 NumberOfFragments, 305 HoareAnnotationTreeSize, 38 FomulaSimplifications, 4 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 230 FormulaSimplificationTreeSizeReductionInter, 2.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 18.3s InterpolantComputationTime, 153 NumberOfCodeBlocks, 153 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 147 ConstructedInterpolants, 17 QuantifiedInterpolants, 700 SizeOfPredicates, 24 NumberOfNonLiveVariables, 323 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 32/46 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 50]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-11-23 03:37:31,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51033e63-99db-424a-9d83-d9b43e3a239b/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE