./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/elimination_max_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df78617e-923d-4dfc-a537-122b5e4a1d7d/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df78617e-923d-4dfc-a537-122b5e4a1d7d/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df78617e-923d-4dfc-a537-122b5e4a1d7d/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df78617e-923d-4dfc-a537-122b5e4a1d7d/bin/utaipan-SDwSMHVbGG/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/elimination_max_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df78617e-923d-4dfc-a537-122b5e4a1d7d/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df78617e-923d-4dfc-a537-122b5e4a1d7d/bin/utaipan-SDwSMHVbGG --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 1d89bfe4b4c4586e423a8e3ebdbb120ac074219803de53807cd9f075553c6e3a .................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 04:51:24,528 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 04:51:24,531 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 04:51:24,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 04:51:24,569 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 04:51:24,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 04:51:24,572 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 04:51:24,575 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 04:51:24,578 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 04:51:24,579 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 04:51:24,581 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 04:51:24,583 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 04:51:24,583 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 04:51:24,585 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 04:51:24,587 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 04:51:24,589 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 04:51:24,591 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 04:51:24,592 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 04:51:24,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 04:51:24,598 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 04:51:24,601 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 04:51:24,603 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 04:51:24,605 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 04:51:24,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 04:51:24,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 04:51:24,612 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 04:51:24,618 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 04:51:24,619 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 04:51:24,620 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 04:51:24,621 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 04:51:24,622 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 04:51:24,623 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 04:51:24,624 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 04:51:24,625 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 04:51:24,626 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 04:51:24,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 04:51:24,628 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 04:51:24,628 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 04:51:24,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 04:51:24,630 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 04:51:24,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 04:51:24,636 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df78617e-923d-4dfc-a537-122b5e4a1d7d/bin/utaipan-SDwSMHVbGG/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-29 04:51:24,678 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 04:51:24,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 04:51:24,680 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 04:51:24,680 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 04:51:24,680 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 04:51:24,681 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 04:51:24,681 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-29 04:51:24,681 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 04:51:24,682 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 04:51:24,682 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-29 04:51:24,682 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-29 04:51:24,682 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 04:51:24,683 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-29 04:51:24,683 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-29 04:51:24,683 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-29 04:51:24,684 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 04:51:24,685 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 04:51:24,685 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 04:51:24,685 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 04:51:24,685 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 04:51:24,686 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-29 04:51:24,686 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 04:51:24,686 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-29 04:51:24,687 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 04:51:24,687 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 04:51:24,687 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 04:51:24,687 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 04:51:24,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-29 04:51:24,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 04:51:24,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 04:51:24,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 04:51:24,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 04:51:24,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 04:51:24,690 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-29 04:51:24,690 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-29 04:51:24,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 04:51:24,690 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-29 04:51:24,691 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 04:51:24,691 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 04:51:24,691 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_df78617e-923d-4dfc-a537-122b5e4a1d7d/bin/utaipan-SDwSMHVbGG/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df78617e-923d-4dfc-a537-122b5e4a1d7d/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d89bfe4b4c4586e423a8e3ebdbb120ac074219803de53807cd9f075553c6e3a [2021-10-29 04:51:24,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 04:51:25,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 04:51:25,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 04:51:25,022 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 04:51:25,024 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 04:51:25,025 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df78617e-923d-4dfc-a537-122b5e4a1d7d/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/verifythis/elimination_max_rec.c [2021-10-29 04:51:25,137 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df78617e-923d-4dfc-a537-122b5e4a1d7d/bin/utaipan-SDwSMHVbGG/data/ddd4060cc/5f1ee0e8a3ef489ca15519ae5d55c290/FLAGf49f6f004 [2021-10-29 04:51:25,657 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 04:51:25,658 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df78617e-923d-4dfc-a537-122b5e4a1d7d/sv-benchmarks/c/verifythis/elimination_max_rec.c [2021-10-29 04:51:25,664 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df78617e-923d-4dfc-a537-122b5e4a1d7d/bin/utaipan-SDwSMHVbGG/data/ddd4060cc/5f1ee0e8a3ef489ca15519ae5d55c290/FLAGf49f6f004 [2021-10-29 04:51:26,038 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df78617e-923d-4dfc-a537-122b5e4a1d7d/bin/utaipan-SDwSMHVbGG/data/ddd4060cc/5f1ee0e8a3ef489ca15519ae5d55c290 [2021-10-29 04:51:26,041 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 04:51:26,045 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 04:51:26,047 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 04:51:26,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 04:51:26,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 04:51:26,052 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 04:51:26" (1/1) ... [2021-10-29 04:51:26,053 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b0b11ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:51:26, skipping insertion in model container [2021-10-29 04:51:26,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 04:51:26" (1/1) ... [2021-10-29 04:51:26,061 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 04:51:26,079 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 04:51:26,321 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_df78617e-923d-4dfc-a537-122b5e4a1d7d/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2021-10-29 04:51:26,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 04:51:26,366 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 04:51:26,381 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_df78617e-923d-4dfc-a537-122b5e4a1d7d/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2021-10-29 04:51:26,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 04:51:26,408 INFO L208 MainTranslator]: Completed translation [2021-10-29 04:51:26,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:51:26 WrapperNode [2021-10-29 04:51:26,409 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 04:51:26,410 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 04:51:26,411 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 04:51:26,411 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 04:51:26,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:51:26" (1/1) ... [2021-10-29 04:51:26,429 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:51:26" (1/1) ... [2021-10-29 04:51:26,454 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 04:51:26,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 04:51:26,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 04:51:26,455 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 04:51:26,465 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:51:26" (1/1) ... [2021-10-29 04:51:26,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:51:26" (1/1) ... [2021-10-29 04:51:26,468 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:51:26" (1/1) ... [2021-10-29 04:51:26,468 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:51:26" (1/1) ... [2021-10-29 04:51:26,475 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:51:26" (1/1) ... [2021-10-29 04:51:26,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:51:26" (1/1) ... [2021-10-29 04:51:26,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:51:26" (1/1) ... [2021-10-29 04:51:26,482 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 04:51:26,484 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 04:51:26,484 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 04:51:26,484 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 04:51:26,485 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:51:26" (1/1) ... [2021-10-29 04:51:26,494 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 04:51:26,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df78617e-923d-4dfc-a537-122b5e4a1d7d/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:51:26,519 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df78617e-923d-4dfc-a537-122b5e4a1d7d/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 04:51:26,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df78617e-923d-4dfc-a537-122b5e4a1d7d/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 04:51:26,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 04:51:26,559 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-10-29 04:51:26,559 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-10-29 04:51:26,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 04:51:26,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-29 04:51:26,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 04:51:26,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 04:51:26,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-29 04:51:26,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-29 04:51:27,014 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 04:51:27,014 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-10-29 04:51:27,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:51:27 BoogieIcfgContainer [2021-10-29 04:51:27,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 04:51:27,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 04:51:27,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 04:51:27,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 04:51:27,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 04:51:26" (1/3) ... [2021-10-29 04:51:27,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11fb7ceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 04:51:27, skipping insertion in model container [2021-10-29 04:51:27,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 04:51:26" (2/3) ... [2021-10-29 04:51:27,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11fb7ceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 04:51:27, skipping insertion in model container [2021-10-29 04:51:27,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:51:27" (3/3) ... [2021-10-29 04:51:27,027 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c [2021-10-29 04:51:27,044 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 04:51:27,045 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-29 04:51:27,100 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 04:51:27,107 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 [2021-10-29 04:51:27,108 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-29 04:51:27,125 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-29 04:51:27,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-29 04:51:27,130 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:51:27,131 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-29 04:51:27,132 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION, checkErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:51:27,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:51:27,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1379807623, now seen corresponding path program 1 times [2021-10-29 04:51:27,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:51:27,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757681825] [2021-10-29 04:51:27,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:51:27,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:51:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:51:27,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:51:27,427 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:51:27,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757681825] [2021-10-29 04:51:27,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757681825] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 04:51:27,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 04:51:27,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-29 04:51:27,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795256365] [2021-10-29 04:51:27,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-29 04:51:27,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:51:27,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-29 04:51:27,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-29 04:51:27,462 INFO L87 Difference]: Start difference. First operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:51:27,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:51:27,654 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2021-10-29 04:51:27,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-29 04:51:27,657 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-29 04:51:27,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:51:27,667 INFO L225 Difference]: With dead ends: 50 [2021-10-29 04:51:27,668 INFO L226 Difference]: Without dead ends: 27 [2021-10-29 04:51:27,672 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-29 04:51:27,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-29 04:51:27,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2021-10-29 04:51:27,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-29 04:51:27,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-10-29 04:51:27,725 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 6 [2021-10-29 04:51:27,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:51:27,726 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-10-29 04:51:27,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:51:27,728 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-10-29 04:51:27,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-29 04:51:27,730 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 04:51:27,730 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 04:51:27,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-29 04:51:27,731 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION, checkErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-29 04:51:27,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 04:51:27,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1023053340, now seen corresponding path program 1 times [2021-10-29 04:51:27,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 04:51:27,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116707306] [2021-10-29 04:51:27,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:51:27,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 04:51:27,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:51:28,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:51:28,048 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 04:51:28,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116707306] [2021-10-29 04:51:28,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116707306] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 04:51:28,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36983790] [2021-10-29 04:51:28,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 04:51:28,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 04:51:28,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df78617e-923d-4dfc-a537-122b5e4a1d7d/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 04:51:28,055 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df78617e-923d-4dfc-a537-122b5e4a1d7d/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 04:51:28,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df78617e-923d-4dfc-a537-122b5e4a1d7d/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-29 04:51:28,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 04:51:28,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-29 04:51:28,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 04:51:28,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-10-29 04:51:28,418 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 [2021-10-29 04:51:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 04:51:28,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 04:51:36,008 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_check_~y_16 Int) (v_check_~x_16 Int)) (or (< v_check_~x_16 |c_check_#in~x|) (and (or (forall ((check_~a.offset Int)) (let ((.cse0 (select |c_#memory_int| |c_check_#in~a.base|))) (< (select .cse0 (+ (* v_check_~y_16 4) check_~a.offset)) (select .cse0 (+ (* v_check_~x_16 4) check_~a.offset))))) (and (<= 0 (+ v_check_~x_16 1)) (< v_check_~y_16 |c_check_#in~n|))) (or (forall ((check_~a.offset Int)) (let ((.cse1 (select |c_#memory_int| |c_check_#in~a.base|))) (<= (select .cse1 (+ (* v_check_~x_16 4) check_~a.offset)) (select .cse1 (+ (* v_check_~y_16 4) check_~a.offset))))) (and (< v_check_~y_16 (+ |c_check_#in~n| 1)) (<= 0 v_check_~x_16)))) (< |c_check_#in~y| v_check_~y_16))) is different from false [2021-10-29 04:51:36,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2021-10-29 04:51:36,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36983790] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-29 04:51:36,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2088831175] [2021-10-29 04:51:36,061 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-29 04:51:36,061 INFO L166 IcfgInterpreter]: Building call graph [2021-10-29 04:51:36,067 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:609) 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) [2021-10-29 04:51:36,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-29 04:51:36,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2021-10-29 04:51:36,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266345301] [2021-10-29 04:51:36,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-29 04:51:36,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 04:51:36,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-29 04:51:36,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=146, Unknown=1, NotChecked=24, Total=210 [2021-10-29 04:51:36,073 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 15 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:51:36,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 04:51:36,423 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-10-29 04:51:36,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-29 04:51:36,424 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-29 04:51:36,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 04:51:36,425 INFO L225 Difference]: With dead ends: 25 [2021-10-29 04:51:36,425 INFO L226 Difference]: Without dead ends: 0 [2021-10-29 04:51:36,427 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=99, Invalid=284, Unknown=1, NotChecked=36, Total=420 [2021-10-29 04:51:36,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-29 04:51:36,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-29 04:51:36,427 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) [2021-10-29 04:51:36,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-29 04:51:36,428 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2021-10-29 04:51:36,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 04:51:36,428 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-29 04:51:36,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 04:51:36,429 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-29 04:51:36,429 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-29 04:51:36,431 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 04:51:36,432 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-29 04:51:36,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df78617e-923d-4dfc-a537-122b5e4a1d7d/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-29 04:51:36,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df78617e-923d-4dfc-a537-122b5e4a1d7d/bin/utaipan-SDwSMHVbGG/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-29 04:51:36,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-29 04:51:36,651 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:51:36,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:51:36,656 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:51:36,658 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:51:36,660 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:51:36,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:51:36,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:51:36,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:51:36,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:51:36,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-29 04:51:36,775 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-29 04:51:36,775 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-29 04:51:36,775 INFO L853 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: (= ((as const (Array Int Int)) 0) (select |#memory_int| ULTIMATE.start_main_~a~0.base)) [2021-10-29 04:51:36,775 INFO L860 garLoopResultBuilder]: At program point L46-1(line 46) the Hoare annotation is: true [2021-10-29 04:51:36,776 INFO L860 garLoopResultBuilder]: At program point checkENTRY(lines 16 39) the Hoare annotation is: true [2021-10-29 04:51:36,776 INFO L857 garLoopResultBuilder]: For program point checkErr0ASSERT_VIOLATIONERROR_FUNCTION(line 11) no Hoare annotation was computed. [2021-10-29 04:51:36,776 INFO L853 garLoopResultBuilder]: At program point L25-2(lines 25 26) 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 (<= 1 check___VERIFIER_assert_~cond) (<= (+ 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)))) [2021-10-29 04:51:36,776 INFO L857 garLoopResultBuilder]: For program point L17(line 17) no Hoare annotation was computed. [2021-10-29 04:51:36,777 INFO L857 garLoopResultBuilder]: For program point L11(line 11) no Hoare annotation was computed. [2021-10-29 04:51:36,777 INFO L857 garLoopResultBuilder]: For program point L11-1(line 11) no Hoare annotation was computed. [2021-10-29 04:51:36,777 INFO L857 garLoopResultBuilder]: For program point L11-3(line 11) no Hoare annotation was computed. [2021-10-29 04:51:36,777 INFO L857 garLoopResultBuilder]: For program point L11-4(line 11) no Hoare annotation was computed. [2021-10-29 04:51:36,777 INFO L857 garLoopResultBuilder]: For program point checkFINAL(lines 16 39) no Hoare annotation was computed. [2021-10-29 04:51:36,777 INFO L857 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2021-10-29 04:51:36,778 INFO L857 garLoopResultBuilder]: For program point checkErr1ASSERT_VIOLATIONERROR_FUNCTION(line 11) no Hoare annotation was computed. [2021-10-29 04:51:36,778 INFO L857 garLoopResultBuilder]: For program point checkEXIT(lines 16 39) no Hoare annotation was computed. [2021-10-29 04:51:36,778 INFO L857 garLoopResultBuilder]: For program point L10(lines 10 12) no Hoare annotation was computed. [2021-10-29 04:51:36,778 INFO L857 garLoopResultBuilder]: For program point L10-1(lines 10 12) no Hoare annotation was computed. [2021-10-29 04:51:36,782 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1] [2021-10-29 04:51:36,783 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 04:51:36,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 04:51:36 BoogieIcfgContainer [2021-10-29 04:51:36,791 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 04:51:36,791 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 04:51:36,792 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 04:51:36,792 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 04:51:36,792 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 04:51:27" (3/4) ... [2021-10-29 04:51:36,795 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-29 04:51:36,801 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2021-10-29 04:51:36,806 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-10-29 04:51:36,806 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-29 04:51:36,807 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-29 04:51:36,807 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-29 04:51:36,862 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df78617e-923d-4dfc-a537-122b5e4a1d7d/bin/utaipan-SDwSMHVbGG/witness.graphml [2021-10-29 04:51:36,862 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 04:51:36,864 INFO L168 Benchmark]: Toolchain (without parser) took 10818.08 ms. Allocated memory was 98.6 MB in the beginning and 125.8 MB in the end (delta: 27.3 MB). Free memory was 64.5 MB in the beginning and 64.2 MB in the end (delta: 312.9 kB). Peak memory consumption was 28.6 MB. Max. memory is 16.1 GB. [2021-10-29 04:51:36,864 INFO L168 Benchmark]: CDTParser took 1.16 ms. Allocated memory is still 98.6 MB. Free memory is still 52.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 04:51:36,865 INFO L168 Benchmark]: CACSL2BoogieTranslator took 362.85 ms. Allocated memory was 98.6 MB in the beginning and 125.8 MB in the end (delta: 27.3 MB). Free memory was 64.2 MB in the beginning and 100.3 MB in the end (delta: -36.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-29 04:51:36,865 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.74 ms. Allocated memory is still 125.8 MB. Free memory was 100.3 MB in the beginning and 99.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 04:51:36,866 INFO L168 Benchmark]: Boogie Preprocessor took 27.90 ms. Allocated memory is still 125.8 MB. Free memory was 99.0 MB in the beginning and 97.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 04:51:36,867 INFO L168 Benchmark]: RCFGBuilder took 533.79 ms. Allocated memory is still 125.8 MB. Free memory was 97.7 MB in the beginning and 80.9 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-29 04:51:36,867 INFO L168 Benchmark]: TraceAbstraction took 9771.51 ms. Allocated memory is still 125.8 MB. Free memory was 80.9 MB in the beginning and 67.3 MB in the end (delta: 13.6 MB). Peak memory consumption was 14.9 MB. Max. memory is 16.1 GB. [2021-10-29 04:51:36,868 INFO L168 Benchmark]: Witness Printer took 70.77 ms. Allocated memory is still 125.8 MB. Free memory was 67.3 MB in the beginning and 64.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-29 04:51:36,871 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.16 ms. Allocated memory is still 98.6 MB. Free memory is still 52.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 362.85 ms. Allocated memory was 98.6 MB in the beginning and 125.8 MB in the end (delta: 27.3 MB). Free memory was 64.2 MB in the beginning and 100.3 MB in the end (delta: -36.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.74 ms. Allocated memory is still 125.8 MB. Free memory was 100.3 MB in the beginning and 99.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.90 ms. Allocated memory is still 125.8 MB. Free memory was 99.0 MB in the beginning and 97.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 533.79 ms. Allocated memory is still 125.8 MB. Free memory was 97.7 MB in the beginning and 80.9 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9771.51 ms. Allocated memory is still 125.8 MB. Free memory was 80.9 MB in the beginning and 67.3 MB in the end (delta: 13.6 MB). Peak memory consumption was 14.9 MB. Max. memory is 16.1 GB. * Witness Printer took 70.77 ms. Allocated memory is still 125.8 MB. Free memory was 67.3 MB in the beginning and 64.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 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: 11]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - 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 2 procedures, 18 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 9.6s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 24 SDtfs, 55 SDslu, 58 SDs, 0 SdLazy, 119 SolverSat, 39 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 6.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=1, 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, 2 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 10 PreInvPairs, 14 NumberOfFragments, 81 HoareAnnotationTreeSize, 10 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 102 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 8.2s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 35 ConstructedInterpolants, 4 QuantifiedInterpolants, 545 SizeOfPredicates, 22 NumberOfNonLiveVariables, 122 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 1/9 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 2 specifications checked. All of them hold - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-29 04:51:36,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df78617e-923d-4dfc-a537-122b5e4a1d7d/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...