./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id2_b5_o10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e6598-8101-43ec-84d0-00a71fbbd766/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e6598-8101-43ec-84d0-00a71fbbd766/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e6598-8101-43ec-84d0-00a71fbbd766/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e6598-8101-43ec-84d0-00a71fbbd766/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id2_b5_o10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e6598-8101-43ec-84d0-00a71fbbd766/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e6598-8101-43ec-84d0-00a71fbbd766/bin/utaipan-UUZaoUuFF8 --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 8c08a983a7c0b08f878bb6cfb5a8d37d856d7302f69f84382c3f724537bcbd1e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:09:14,283 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:09:14,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:09:14,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:09:14,344 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:09:14,348 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:09:14,349 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:09:14,353 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:09:14,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:09:14,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:09:14,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:09:14,365 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:09:14,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:09:14,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:09:14,370 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:09:14,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:09:14,376 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:09:14,378 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:09:14,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:09:14,388 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:09:14,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:09:14,391 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:09:14,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:09:14,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:09:14,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:09:14,405 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:09:14,405 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:09:14,407 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:09:14,408 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:09:14,409 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:09:14,410 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:09:14,411 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:09:14,413 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:09:14,414 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:09:14,415 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:09:14,416 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:09:14,416 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:09:14,416 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:09:14,417 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:09:14,418 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:09:14,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:09:14,420 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e6598-8101-43ec-84d0-00a71fbbd766/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:09:14,462 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:09:14,462 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:09:14,463 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:09:14,464 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:09:14,464 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:09:14,464 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:09:14,464 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:09:14,465 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:09:14,471 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:09:14,471 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:09:14,472 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:09:14,472 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:09:14,473 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:09:14,473 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:09:14,473 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:09:14,474 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:09:14,474 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:09:14,474 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:09:14,474 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:09:14,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:09:14,475 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:09:14,475 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:09:14,475 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:09:14,476 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:09:14,476 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:09:14,476 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:09:14,476 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:09:14,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:09:14,477 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:09:14,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:09:14,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:09:14,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:09:14,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:09:14,479 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:09:14,480 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:09:14,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:09:14,480 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:09:14,480 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:09:14,480 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:09:14,481 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_315e6598-8101-43ec-84d0-00a71fbbd766/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e6598-8101-43ec-84d0-00a71fbbd766/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c08a983a7c0b08f878bb6cfb5a8d37d856d7302f69f84382c3f724537bcbd1e [2021-11-07 02:09:14,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:09:14,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:09:14,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:09:14,825 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:09:14,827 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:09:14,828 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e6598-8101-43ec-84d0-00a71fbbd766/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/recursive-simple/id2_b5_o10.c [2021-11-07 02:09:14,917 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e6598-8101-43ec-84d0-00a71fbbd766/bin/utaipan-UUZaoUuFF8/data/9ed78e4c5/d2939195d2c940a39d8c013c141468d7/FLAG793283c8c [2021-11-07 02:09:15,379 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:09:15,380 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e6598-8101-43ec-84d0-00a71fbbd766/sv-benchmarks/c/recursive-simple/id2_b5_o10.c [2021-11-07 02:09:15,387 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e6598-8101-43ec-84d0-00a71fbbd766/bin/utaipan-UUZaoUuFF8/data/9ed78e4c5/d2939195d2c940a39d8c013c141468d7/FLAG793283c8c [2021-11-07 02:09:15,748 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e6598-8101-43ec-84d0-00a71fbbd766/bin/utaipan-UUZaoUuFF8/data/9ed78e4c5/d2939195d2c940a39d8c013c141468d7 [2021-11-07 02:09:15,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:09:15,756 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:09:15,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:09:15,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:09:15,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:09:15,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:09:15" (1/1) ... [2021-11-07 02:09:15,769 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f84f745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:15, skipping insertion in model container [2021-11-07 02:09:15,769 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:09:15" (1/1) ... [2021-11-07 02:09:15,778 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:09:15,794 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:09:16,044 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_315e6598-8101-43ec-84d0-00a71fbbd766/sv-benchmarks/c/recursive-simple/id2_b5_o10.c[773,786] [2021-11-07 02:09:16,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:09:16,066 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:09:16,083 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_315e6598-8101-43ec-84d0-00a71fbbd766/sv-benchmarks/c/recursive-simple/id2_b5_o10.c[773,786] [2021-11-07 02:09:16,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:09:16,097 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:09:16,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:16 WrapperNode [2021-11-07 02:09:16,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:09:16,100 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:09:16,100 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:09:16,100 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:09:16,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:16" (1/1) ... [2021-11-07 02:09:16,114 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:16" (1/1) ... [2021-11-07 02:09:16,129 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:09:16,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:09:16,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:09:16,130 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:09:16,138 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:16" (1/1) ... [2021-11-07 02:09:16,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:16" (1/1) ... [2021-11-07 02:09:16,140 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:16" (1/1) ... [2021-11-07 02:09:16,140 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:16" (1/1) ... [2021-11-07 02:09:16,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:16" (1/1) ... [2021-11-07 02:09:16,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:16" (1/1) ... [2021-11-07 02:09:16,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:16" (1/1) ... [2021-11-07 02:09:16,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:09:16,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:09:16,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:09:16,149 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:09:16,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:16" (1/1) ... [2021-11-07 02:09:16,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:09:16,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e6598-8101-43ec-84d0-00a71fbbd766/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:09:16,185 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e6598-8101-43ec-84d0-00a71fbbd766/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:09:16,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e6598-8101-43ec-84d0-00a71fbbd766/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:09:16,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 02:09:16,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:09:16,225 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2021-11-07 02:09:16,225 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2021-11-07 02:09:16,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:09:16,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:09:16,225 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-11-07 02:09:16,225 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-11-07 02:09:16,532 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:09:16,532 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 02:09:16,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:09:16 BoogieIcfgContainer [2021-11-07 02:09:16,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:09:16,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:09:16,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:09:16,540 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:09:16,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:09:15" (1/3) ... [2021-11-07 02:09:16,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54bf25d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:09:16, skipping insertion in model container [2021-11-07 02:09:16,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:16" (2/3) ... [2021-11-07 02:09:16,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54bf25d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:09:16, skipping insertion in model container [2021-11-07 02:09:16,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:09:16" (3/3) ... [2021-11-07 02:09:16,543 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_b5_o10.c [2021-11-07 02:09:16,548 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:09:16,548 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 02:09:16,603 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:09:16,610 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 [2021-11-07 02:09:16,610 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 02:09:16,625 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 02:09:16,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 02:09:16,629 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:16,630 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:09:16,631 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:09:16,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:16,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1546332850, now seen corresponding path program 1 times [2021-11-07 02:09:16,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:09:16,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372437247] [2021-11-07 02:09:16,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:16,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:09:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:16,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:09:16,948 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:09:16,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372437247] [2021-11-07 02:09:16,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372437247] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:16,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:09:16,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 02:09:16,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638639923] [2021-11-07 02:09:16,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:09:16,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:09:16,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:09:16,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:09:16,986 INFO L87 Difference]: Start difference. First operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 02:09:17,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:17,046 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-11-07 02:09:17,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:09:17,049 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-11-07 02:09:17,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:17,060 INFO L225 Difference]: With dead ends: 30 [2021-11-07 02:09:17,060 INFO L226 Difference]: Without dead ends: 20 [2021-11-07 02:09:17,066 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:09:17,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-07 02:09:17,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-07 02:09:17,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-07 02:09:17,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-11-07 02:09:17,115 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 9 [2021-11-07 02:09:17,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:17,116 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-11-07 02:09:17,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 02:09:17,117 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-11-07 02:09:17,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 02:09:17,119 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:17,120 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:09:17,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 02:09:17,121 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:09:17,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:17,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1895588019, now seen corresponding path program 1 times [2021-11-07 02:09:17,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:09:17,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329976274] [2021-11-07 02:09:17,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:17,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:09:17,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:09:17,344 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:09:17,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329976274] [2021-11-07 02:09:17,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329976274] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:17,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:09:17,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 02:09:17,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618224825] [2021-11-07 02:09:17,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:09:17,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:09:17,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:09:17,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:09:17,355 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 02:09:17,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:17,430 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-11-07 02:09:17,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:09:17,431 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2021-11-07 02:09:17,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:17,432 INFO L225 Difference]: With dead ends: 29 [2021-11-07 02:09:17,432 INFO L226 Difference]: Without dead ends: 25 [2021-11-07 02:09:17,433 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:09:17,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-07 02:09:17,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2021-11-07 02:09:17,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-07 02:09:17,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-11-07 02:09:17,454 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2021-11-07 02:09:17,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:17,455 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-11-07 02:09:17,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-07 02:09:17,456 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-11-07 02:09:17,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-07 02:09:17,457 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:17,457 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:09:17,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 02:09:17,458 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:09:17,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:17,468 INFO L85 PathProgramCache]: Analyzing trace with hash -523916524, now seen corresponding path program 1 times [2021-11-07 02:09:17,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:09:17,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628724389] [2021-11-07 02:09:17,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:17,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:09:17,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:09:17,773 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:09:17,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628724389] [2021-11-07 02:09:17,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628724389] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 02:09:17,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875764306] [2021-11-07 02:09:17,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:17,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:09:17,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e6598-8101-43ec-84d0-00a71fbbd766/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:09:17,786 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e6598-8101-43ec-84d0-00a71fbbd766/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:09:17,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e6598-8101-43ec-84d0-00a71fbbd766/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 02:09:17,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:17,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:09:17,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:18,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:09:18,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:18,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:09:18,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875764306] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:18,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-11-07 02:09:18,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [9] total 15 [2021-11-07 02:09:18,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621462459] [2021-11-07 02:09:18,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:09:18,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:09:18,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:09:18,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:09:18,327 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-07 02:09:18,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:18,343 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-11-07 02:09:18,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:09:18,344 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 21 [2021-11-07 02:09:18,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:18,345 INFO L225 Difference]: With dead ends: 23 [2021-11-07 02:09:18,345 INFO L226 Difference]: Without dead ends: 0 [2021-11-07 02:09:18,346 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:09:18,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-07 02:09:18,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-07 02:09:18,347 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) [2021-11-07 02:09:18,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-07 02:09:18,347 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2021-11-07 02:09:18,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:18,348 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-07 02:09:18,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-07 02:09:18,348 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-07 02:09:18,348 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-07 02:09:18,351 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 02:09:18,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e6598-8101-43ec-84d0-00a71fbbd766/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:18,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e6598-8101-43ec-84d0-00a71fbbd766/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-07 02:09:18,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-07 02:09:18,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:09:18,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:09:18,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:09:18,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:09:18,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:09:18,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:09:18,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 02:09:18,579 INFO L857 garLoopResultBuilder]: For program point L17(line 17) no Hoare annotation was computed. [2021-11-07 02:09:18,590 INFO L857 garLoopResultBuilder]: For program point L18-1(line 18) no Hoare annotation was computed. [2021-11-07 02:09:18,590 INFO L857 garLoopResultBuilder]: For program point id2EXIT(lines 16 21) no Hoare annotation was computed. [2021-11-07 02:09:18,591 INFO L860 garLoopResultBuilder]: At program point id2ENTRY(lines 16 21) the Hoare annotation is: true [2021-11-07 02:09:18,591 INFO L857 garLoopResultBuilder]: For program point id2FINAL(lines 16 21) no Hoare annotation was computed. [2021-11-07 02:09:18,591 INFO L860 garLoopResultBuilder]: At program point L18(line 18) the Hoare annotation is: true [2021-11-07 02:09:18,591 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-07 02:09:18,592 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-07 02:09:18,592 INFO L857 garLoopResultBuilder]: For program point L27(line 27) no Hoare annotation was computed. [2021-11-07 02:09:18,592 INFO L857 garLoopResultBuilder]: For program point L26(lines 26 28) no Hoare annotation was computed. [2021-11-07 02:09:18,592 INFO L860 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2021-11-07 02:09:18,593 INFO L857 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2021-11-07 02:09:18,593 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2021-11-07 02:09:18,593 INFO L857 garLoopResultBuilder]: For program point L23(lines 23 29) no Hoare annotation was computed. [2021-11-07 02:09:18,594 INFO L857 garLoopResultBuilder]: For program point idFINAL(lines 9 14) no Hoare annotation was computed. [2021-11-07 02:09:18,594 INFO L860 garLoopResultBuilder]: At program point L11(line 11) the Hoare annotation is: true [2021-11-07 02:09:18,594 INFO L857 garLoopResultBuilder]: For program point idEXIT(lines 9 14) no Hoare annotation was computed. [2021-11-07 02:09:18,594 INFO L857 garLoopResultBuilder]: For program point L10(line 10) no Hoare annotation was computed. [2021-11-07 02:09:18,595 INFO L857 garLoopResultBuilder]: For program point L11-1(line 11) no Hoare annotation was computed. [2021-11-07 02:09:18,595 INFO L860 garLoopResultBuilder]: At program point idENTRY(lines 9 14) the Hoare annotation is: true [2021-11-07 02:09:18,599 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-11-07 02:09:18,601 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 02:09:18,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 02:09:18 BoogieIcfgContainer [2021-11-07 02:09:18,604 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 02:09:18,605 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 02:09:18,605 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 02:09:18,605 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 02:09:18,606 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:09:16" (3/4) ... [2021-11-07 02:09:18,609 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-07 02:09:18,616 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id2 [2021-11-07 02:09:18,617 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2021-11-07 02:09:18,621 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-11-07 02:09:18,622 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-07 02:09:18,622 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-07 02:09:18,622 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-07 02:09:18,684 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e6598-8101-43ec-84d0-00a71fbbd766/bin/utaipan-UUZaoUuFF8/witness.graphml [2021-11-07 02:09:18,684 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 02:09:18,686 INFO L168 Benchmark]: Toolchain (without parser) took 2929.33 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 57.1 MB in the beginning and 55.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 23.5 MB. Max. memory is 16.1 GB. [2021-11-07 02:09:18,686 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 98.6 MB. Free memory was 73.7 MB in the beginning and 73.6 MB in the end (delta: 53.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:09:18,687 INFO L168 Benchmark]: CACSL2BoogieTranslator took 337.97 ms. Allocated memory is still 98.6 MB. Free memory was 56.9 MB in the beginning and 74.2 MB in the end (delta: -17.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-07 02:09:18,688 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.70 ms. Allocated memory is still 98.6 MB. Free memory was 74.2 MB in the beginning and 72.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 02:09:18,688 INFO L168 Benchmark]: Boogie Preprocessor took 18.36 ms. Allocated memory is still 98.6 MB. Free memory was 72.9 MB in the beginning and 71.9 MB in the end (delta: 933.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:09:18,689 INFO L168 Benchmark]: RCFGBuilder took 385.92 ms. Allocated memory is still 98.6 MB. Free memory was 71.6 MB in the beginning and 60.6 MB in the end (delta: 11.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 02:09:18,689 INFO L168 Benchmark]: TraceAbstraction took 2068.28 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 60.1 MB in the beginning and 57.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 25.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:09:18,690 INFO L168 Benchmark]: Witness Printer took 79.31 ms. Allocated memory is still 119.5 MB. Free memory was 57.5 MB in the beginning and 55.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 02:09:18,693 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 98.6 MB. Free memory was 73.7 MB in the beginning and 73.6 MB in the end (delta: 53.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 337.97 ms. Allocated memory is still 98.6 MB. Free memory was 56.9 MB in the beginning and 74.2 MB in the end (delta: -17.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.70 ms. Allocated memory is still 98.6 MB. Free memory was 74.2 MB in the beginning and 72.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.36 ms. Allocated memory is still 98.6 MB. Free memory was 72.9 MB in the beginning and 71.9 MB in the end (delta: 933.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 385.92 ms. Allocated memory is still 98.6 MB. Free memory was 71.6 MB in the beginning and 60.6 MB in the end (delta: 11.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2068.28 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 60.1 MB in the beginning and 57.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 25.7 MB. Max. memory is 16.1 GB. * Witness Printer took 79.31 ms. Allocated memory is still 119.5 MB. Free memory was 57.5 MB in the beginning and 55.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s 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: 27]: 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 3 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.9s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 57 SDtfs, 2 SDslu, 238 SDs, 0 SdLazy, 38 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=2, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 5 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 66 NumberOfCodeBlocks, 66 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 82 ConstructedInterpolants, 0 QuantifiedInterpolants, 228 SizeOfPredicates, 1 NumberOfNonLiveVariables, 75 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 10/12 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 RESULT: Ultimate proved your program to be correct! [2021-11-07 02:09:18,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e6598-8101-43ec-84d0-00a71fbbd766/bin/utaipan-UUZaoUuFF8/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