./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 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50600c00-e83a-4dbd-ae04-631592d676c1/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50600c00-e83a-4dbd-ae04-631592d676c1/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50600c00-e83a-4dbd-ae04-631592d676c1/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50600c00-e83a-4dbd-ae04-631592d676c1/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/elimination_max_rec.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50600c00-e83a-4dbd-ae04-631592d676c1/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50600c00-e83a-4dbd-ae04-631592d676c1/bin/utaipan-mTDlp9Zugs --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 7862960b0aa057ac19174563f251d134d1269c2b ................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:01:41,650 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:01:41,653 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:01:41,714 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:01:41,715 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:01:41,720 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:01:41,723 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:01:41,728 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:01:41,732 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:01:41,739 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:01:41,741 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:01:41,743 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:01:41,744 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:01:41,748 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:01:41,752 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:01:41,758 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:01:41,760 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:01:41,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:01:41,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:01:41,775 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:01:41,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:01:41,779 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:01:41,781 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:01:41,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:01:41,787 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:01:41,788 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:01:41,788 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:01:41,790 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:01:41,791 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:01:41,792 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:01:41,793 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:01:41,794 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:01:41,796 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:01:41,797 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:01:41,798 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:01:41,799 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:01:41,800 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:01:41,800 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:01:41,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:01:41,802 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:01:41,803 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:01:41,804 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50600c00-e83a-4dbd-ae04-631592d676c1/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:01:41,840 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:01:41,840 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:01:41,841 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:01:41,841 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:01:41,841 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:01:41,842 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:01:41,842 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:01:41,842 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:01:41,842 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:01:41,843 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:01:41,843 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:01:41,843 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:01:41,843 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:01:41,844 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:01:41,844 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:01:41,845 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:01:41,845 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:01:41,845 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:01:41,845 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:01:41,846 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:01:41,846 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:01:41,846 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:01:41,846 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:01:41,854 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:01:41,855 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:01:41,855 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:01:41,855 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:01:41,856 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:01:41,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:01:41,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:01:41,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:01:41,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:01:41,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:01:41,859 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:01:41,859 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:01:41,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:01:41,861 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:01:41,861 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:01:41,861 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:01:41,861 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_50600c00-e83a-4dbd-ae04-631592d676c1/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50600c00-e83a-4dbd-ae04-631592d676c1/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7862960b0aa057ac19174563f251d134d1269c2b [2021-10-16 02:01:42,251 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:01:42,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:01:42,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:01:42,307 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:01:42,308 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:01:42,309 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50600c00-e83a-4dbd-ae04-631592d676c1/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/verifythis/elimination_max_rec.c [2021-10-16 02:01:42,420 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50600c00-e83a-4dbd-ae04-631592d676c1/bin/utaipan-mTDlp9Zugs/data/41b546291/1c3d1edc7c4d4e55a65bb2c86a662ca4/FLAGe519ebed5 [2021-10-16 02:01:42,942 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:01:42,943 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50600c00-e83a-4dbd-ae04-631592d676c1/sv-benchmarks/c/verifythis/elimination_max_rec.c [2021-10-16 02:01:42,953 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50600c00-e83a-4dbd-ae04-631592d676c1/bin/utaipan-mTDlp9Zugs/data/41b546291/1c3d1edc7c4d4e55a65bb2c86a662ca4/FLAGe519ebed5 [2021-10-16 02:01:43,283 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50600c00-e83a-4dbd-ae04-631592d676c1/bin/utaipan-mTDlp9Zugs/data/41b546291/1c3d1edc7c4d4e55a65bb2c86a662ca4 [2021-10-16 02:01:43,286 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:01:43,291 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:01:43,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:01:43,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:01:43,301 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:01:43,305 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:01:43" (1/1) ... [2021-10-16 02:01:43,307 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@136c7045 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:01:43, skipping insertion in model container [2021-10-16 02:01:43,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:01:43" (1/1) ... [2021-10-16 02:01:43,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:01:43,342 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:01:43,538 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_50600c00-e83a-4dbd-ae04-631592d676c1/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2021-10-16 02:01:43,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:01:43,584 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:01:43,599 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_50600c00-e83a-4dbd-ae04-631592d676c1/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2021-10-16 02:01:43,610 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:01:43,629 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:01:43,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:01:43 WrapperNode [2021-10-16 02:01:43,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:01:43,632 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:01:43,632 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:01:43,632 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:01:43,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:01:43" (1/1) ... [2021-10-16 02:01:43,653 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:01:43" (1/1) ... [2021-10-16 02:01:43,681 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:01:43,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:01:43,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:01:43,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:01:43,694 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:01:43" (1/1) ... [2021-10-16 02:01:43,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:01:43" (1/1) ... [2021-10-16 02:01:43,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:01:43" (1/1) ... [2021-10-16 02:01:43,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:01:43" (1/1) ... [2021-10-16 02:01:43,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:01:43" (1/1) ... [2021-10-16 02:01:43,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:01:43" (1/1) ... [2021-10-16 02:01:43,713 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:01:43" (1/1) ... [2021-10-16 02:01:43,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:01:43,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:01:43,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:01:43,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:01:43,720 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:01:43" (1/1) ... [2021-10-16 02:01:43,730 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:01:43,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50600c00-e83a-4dbd-ae04-631592d676c1/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:01:43,761 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50600c00-e83a-4dbd-ae04-631592d676c1/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:01:43,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50600c00-e83a-4dbd-ae04-631592d676c1/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:01:43,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:01:43,812 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-10-16 02:01:43,812 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-10-16 02:01:43,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:01:43,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 02:01:43,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:01:43,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:01:43,813 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-16 02:01:43,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:01:44,479 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:01:44,480 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-10-16 02:01:44,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:01:44 BoogieIcfgContainer [2021-10-16 02:01:44,483 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:01:44,485 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:01:44,486 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:01:44,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:01:44,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:01:43" (1/3) ... [2021-10-16 02:01:44,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fcced2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:01:44, skipping insertion in model container [2021-10-16 02:01:44,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:01:43" (2/3) ... [2021-10-16 02:01:44,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fcced2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:01:44, skipping insertion in model container [2021-10-16 02:01:44,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:01:44" (3/3) ... [2021-10-16 02:01:44,498 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c [2021-10-16 02:01:44,505 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:01:44,506 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-16 02:01:44,613 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:01:44,622 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:01:44,622 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-16 02:01:44,651 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) [2021-10-16 02:01:44,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:01:44,676 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:01:44,676 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:01:44,677 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION, checkErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:01:44,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:01:44,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1379807623, now seen corresponding path program 1 times [2021-10-16 02:01:44,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:01:44,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651889924] [2021-10-16 02:01:44,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:01:44,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:01:44,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:01:44,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:01:44,991 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:01:44,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651889924] [2021-10-16 02:01:44,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651889924] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:01:44,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:01:44,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-16 02:01:44,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303979380] [2021-10-16 02:01:45,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:01:45,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:01:45,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:01:45,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:01:45,023 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) [2021-10-16 02:01:45,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:01:45,160 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2021-10-16 02:01:45,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:01:45,162 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 [2021-10-16 02:01:45,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:01:45,173 INFO L225 Difference]: With dead ends: 50 [2021-10-16 02:01:45,174 INFO L226 Difference]: Without dead ends: 27 [2021-10-16 02:01:45,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:01:45,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-16 02:01:45,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2021-10-16 02:01:45,253 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) [2021-10-16 02:01:45,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-10-16 02:01:45,259 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 6 [2021-10-16 02:01:45,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:01:45,260 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-10-16 02:01:45,261 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) [2021-10-16 02:01:45,261 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-10-16 02:01:45,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:01:45,263 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:01:45,264 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:01:45,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:01:45,264 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION, checkErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:01:45,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:01:45,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1023053340, now seen corresponding path program 1 times [2021-10-16 02:01:45,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:01:45,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945998067] [2021-10-16 02:01:45,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:01:45,271 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:01:45,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:01:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:01:45,707 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:01:45,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945998067] [2021-10-16 02:01:45,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945998067] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:01:45,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336925787] [2021-10-16 02:01:45,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:01:45,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:01:45,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50600c00-e83a-4dbd-ae04-631592d676c1/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:01:45,711 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50600c00-e83a-4dbd-ae04-631592d676c1/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:01:45,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50600c00-e83a-4dbd-ae04-631592d676c1/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:01:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:01:45,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-16 02:01:45,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:01:45,883 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 [2021-10-16 02:01:46,231 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 [2021-10-16 02:01:46,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:01:46,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:01:56,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:01:56,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336925787] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:01:56,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1848544206] [2021-10-16 02:01:56,351 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-16 02:01:56,352 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:01:56,358 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:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-16 02:01:56,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-16 02:01:56,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2021-10-16 02:01:56,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988794245] [2021-10-16 02:01:56,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-16 02:01:56,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:01:56,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-16 02:01:56,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=166, Unknown=1, NotChecked=0, Total=210 [2021-10-16 02:01:56,367 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) [2021-10-16 02:01:56,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:01:56,761 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-10-16 02:01:56,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-16 02:01:56,762 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 [2021-10-16 02:01:56,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:01:56,762 INFO L225 Difference]: With dead ends: 25 [2021-10-16 02:01:56,763 INFO L226 Difference]: Without dead ends: 0 [2021-10-16 02:01:56,764 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 8580.1ms TimeCoverageRelationStatistics Valid=109, Invalid=310, Unknown=1, NotChecked=0, Total=420 [2021-10-16 02:01:56,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-16 02:01:56,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-16 02:01:56,765 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) [2021-10-16 02:01:56,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-16 02:01:56,766 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2021-10-16 02:01:56,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:01:56,767 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-16 02:01:56,767 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) [2021-10-16 02:01:56,767 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-16 02:01:56,768 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-16 02:01:56,770 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:01:56,771 INFO L764 garLoopResultBuilder]: Registering result SAFE for location checkErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:01:56,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50600c00-e83a-4dbd-ae04-631592d676c1/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:01:56,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50600c00-e83a-4dbd-ae04-631592d676c1/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:01:56,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-16 02:01:56,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:01:57,000 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:01:57,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:01:57,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:01:57,023 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:01:57,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:01:57,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:01:57,035 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:01:57,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:01:57,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:01:57,161 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-16 02:01:57,161 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-16 02:01:57,162 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)) [2021-10-16 02:01:57,162 INFO L860 garLoopResultBuilder]: At program point L46-1(line 46) the Hoare annotation is: true [2021-10-16 02:01:57,162 INFO L860 garLoopResultBuilder]: At program point checkENTRY(lines 16 39) the Hoare annotation is: true [2021-10-16 02:01:57,163 INFO L857 garLoopResultBuilder]: For program point checkErr0ASSERT_VIOLATIONERROR_FUNCTION(line 11) no Hoare annotation was computed. [2021-10-16 02:01:57,163 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)))) [2021-10-16 02:01:57,164 INFO L857 garLoopResultBuilder]: For program point L17(line 17) no Hoare annotation was computed. [2021-10-16 02:01:57,164 INFO L857 garLoopResultBuilder]: For program point L11(line 11) no Hoare annotation was computed. [2021-10-16 02:01:57,164 INFO L857 garLoopResultBuilder]: For program point L11-1(line 11) no Hoare annotation was computed. [2021-10-16 02:01:57,164 INFO L857 garLoopResultBuilder]: For program point L11-3(line 11) no Hoare annotation was computed. [2021-10-16 02:01:57,165 INFO L857 garLoopResultBuilder]: For program point L11-4(line 11) no Hoare annotation was computed. [2021-10-16 02:01:57,165 INFO L857 garLoopResultBuilder]: For program point checkFINAL(lines 16 39) no Hoare annotation was computed. [2021-10-16 02:01:57,165 INFO L857 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2021-10-16 02:01:57,165 INFO L857 garLoopResultBuilder]: For program point checkErr1ASSERT_VIOLATIONERROR_FUNCTION(line 11) no Hoare annotation was computed. [2021-10-16 02:01:57,166 INFO L857 garLoopResultBuilder]: For program point checkEXIT(lines 16 39) no Hoare annotation was computed. [2021-10-16 02:01:57,166 INFO L857 garLoopResultBuilder]: For program point L10(lines 10 12) no Hoare annotation was computed. [2021-10-16 02:01:57,166 INFO L857 garLoopResultBuilder]: For program point L10-1(lines 10 12) no Hoare annotation was computed. [2021-10-16 02:01:57,172 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:01:57,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:01:57 BoogieIcfgContainer [2021-10-16 02:01:57,181 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:01:57,182 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:01:57,182 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:01:57,183 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:01:57,183 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:01:44" (3/4) ... [2021-10-16 02:01:57,187 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-16 02:01:57,195 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2021-10-16 02:01:57,202 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-10-16 02:01:57,202 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-16 02:01:57,203 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-16 02:01:57,203 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 02:01:57,256 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50600c00-e83a-4dbd-ae04-631592d676c1/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:01:57,256 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:01:57,258 INFO L168 Benchmark]: Toolchain (without parser) took 13966.47 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 72.4 MB in the beginning and 70.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:01:57,259 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 109.1 MB. Free memory was 88.8 MB in the beginning and 88.8 MB in the end (delta: 75.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:01:57,260 INFO L168 Benchmark]: CACSL2BoogieTranslator took 337.40 ms. Allocated memory is still 109.1 MB. Free memory was 72.1 MB in the beginning and 85.4 MB in the end (delta: -13.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:01:57,261 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.13 ms. Allocated memory is still 109.1 MB. Free memory was 85.4 MB in the beginning and 83.6 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:01:57,261 INFO L168 Benchmark]: Boogie Preprocessor took 34.48 ms. Allocated memory is still 109.1 MB. Free memory was 83.6 MB in the beginning and 82.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:01:57,262 INFO L168 Benchmark]: RCFGBuilder took 765.45 ms. Allocated memory is still 109.1 MB. Free memory was 82.6 MB in the beginning and 66.5 MB in the end (delta: 16.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:01:57,263 INFO L168 Benchmark]: TraceAbstraction took 12695.91 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 65.8 MB in the beginning and 74.0 MB in the end (delta: -8.2 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:01:57,264 INFO L168 Benchmark]: Witness Printer took 74.62 ms. Allocated memory is still 132.1 MB. Free memory was 74.0 MB in the beginning and 70.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:01:57,267 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 109.1 MB. Free memory was 88.8 MB in the beginning and 88.8 MB in the end (delta: 75.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 337.40 ms. Allocated memory is still 109.1 MB. Free memory was 72.1 MB in the beginning and 85.4 MB in the end (delta: -13.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 50.13 ms. Allocated memory is still 109.1 MB. Free memory was 85.4 MB in the beginning and 83.6 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.48 ms. Allocated memory is still 109.1 MB. Free memory was 83.6 MB in the beginning and 82.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 765.45 ms. Allocated memory is still 109.1 MB. Free memory was 82.6 MB in the beginning and 66.5 MB in the end (delta: 16.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 12695.91 ms. Allocated memory was 109.1 MB in the beginning and 132.1 MB in the end (delta: 23.1 MB). Free memory was 65.8 MB in the beginning and 74.0 MB in the end (delta: -8.2 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.1 GB. * Witness Printer took 74.62 ms. Allocated memory is still 132.1 MB. Free memory was 74.0 MB in the beginning and 70.9 MB in the end (delta: 3.1 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, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms 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: 12562.0ms, OverallIterations: 2, TraceHistogramMax: 2, EmptinessCheckTime: 36.8ms, AutomataDifference: 574.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 169.2ms, InitialAbstractionConstructionTime: 18.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 24 SDtfs, 62 SDslu, 57 SDs, 0 SdLazy, 119 SolverSat, 43 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 171.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 8646.4ms Time, 0.0ms 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, 0.0ms DumpTime, AutomataMinimizationStatistics: 63.2ms AutomataMinimizationTime, 2 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 4 LocationsWithAnnotation, 10 PreInvPairs, 14 NumberOfFragments, 81 HoareAnnotationTreeSize, 10 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 59.7ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 102 FormulaSimplificationTreeSizeReductionInter, 100.9ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 31.3ms SsaConstructionTime, 183.5ms SatisfiabilityAnalysisTime, 10994.4ms InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 35 ConstructedInterpolants, 4 QuantifiedInterpolants, 545 SizeOfPredicates, 22 NumberOfNonLiveVariables, 122 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 2/9 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! [2021-10-16 02:01:57,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50600c00-e83a-4dbd-ae04-631592d676c1/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...