./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem15_label14.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee0612f-e1eb-48fc-bb7f-a1dc24907a62/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee0612f-e1eb-48fc-bb7f-a1dc24907a62/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee0612f-e1eb-48fc-bb7f-a1dc24907a62/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee0612f-e1eb-48fc-bb7f-a1dc24907a62/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem15_label14.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee0612f-e1eb-48fc-bb7f-a1dc24907a62/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee0612f-e1eb-48fc-bb7f-a1dc24907a62/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 970a84593c0bec11fea8b95335966215ba468481b559446652c2d60f98ba63c5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:31:55,957 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:31:55,960 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:31:56,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:31:56,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:31:56,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:31:56,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:31:56,026 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:31:56,029 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:31:56,034 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:31:56,035 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:31:56,036 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:31:56,037 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:31:56,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:31:56,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:31:56,050 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:31:56,052 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:31:56,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:31:56,055 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:31:56,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:31:56,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:31:56,068 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:31:56,071 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:31:56,072 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:31:56,076 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:31:56,076 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:31:56,076 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:31:56,078 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:31:56,079 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:31:56,080 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:31:56,081 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:31:56,082 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:31:56,083 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:31:56,084 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:31:56,086 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:31:56,086 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:31:56,087 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:31:56,087 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:31:56,087 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:31:56,088 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:31:56,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:31:56,090 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee0612f-e1eb-48fc-bb7f-a1dc24907a62/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:31:56,135 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:31:56,135 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:31:56,136 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:31:56,136 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:31:56,143 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:31:56,143 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:31:56,143 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:31:56,143 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:31:56,144 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:31:56,144 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:31:56,145 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:31:56,145 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:31:56,146 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:31:56,146 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:31:56,146 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:31:56,146 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:31:56,146 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:31:56,147 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:31:56,147 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:31:56,148 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:31:56,148 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:31:56,148 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:31:56,148 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:31:56,148 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:31:56,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:31:56,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:31:56,151 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:31:56,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:31:56,151 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:31:56,151 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:31:56,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:31:56,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:31:56,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:31:56,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:31:56,153 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:31:56,153 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:31:56,153 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:31:56,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:31:56,154 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:31:56,154 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:31:56,154 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:31:56,154 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_3ee0612f-e1eb-48fc-bb7f-a1dc24907a62/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee0612f-e1eb-48fc-bb7f-a1dc24907a62/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 970a84593c0bec11fea8b95335966215ba468481b559446652c2d60f98ba63c5 [2021-11-23 02:31:56,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:31:56,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:31:56,440 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:31:56,441 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:31:56,442 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:31:56,443 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee0612f-e1eb-48fc-bb7f-a1dc24907a62/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/eca-rers2012/Problem15_label14.c [2021-11-23 02:31:56,524 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee0612f-e1eb-48fc-bb7f-a1dc24907a62/bin/utaipan-EQgc7hIp5V/data/6b6ec2173/85036f1e5fa940c68f75c54088d9b23c/FLAGa9aa9f487 [2021-11-23 02:31:57,206 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:31:57,206 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee0612f-e1eb-48fc-bb7f-a1dc24907a62/sv-benchmarks/c/eca-rers2012/Problem15_label14.c [2021-11-23 02:31:57,224 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee0612f-e1eb-48fc-bb7f-a1dc24907a62/bin/utaipan-EQgc7hIp5V/data/6b6ec2173/85036f1e5fa940c68f75c54088d9b23c/FLAGa9aa9f487 [2021-11-23 02:31:57,379 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee0612f-e1eb-48fc-bb7f-a1dc24907a62/bin/utaipan-EQgc7hIp5V/data/6b6ec2173/85036f1e5fa940c68f75c54088d9b23c [2021-11-23 02:31:57,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:31:57,383 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:31:57,386 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:31:57,386 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:31:57,390 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:31:57,391 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:31:57" (1/1) ... [2021-11-23 02:31:57,394 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1657db68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:57, skipping insertion in model container [2021-11-23 02:31:57,394 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:31:57" (1/1) ... [2021-11-23 02:31:57,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:31:57,510 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:31:57,773 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee0612f-e1eb-48fc-bb7f-a1dc24907a62/sv-benchmarks/c/eca-rers2012/Problem15_label14.c[2008,2021] [2021-11-23 02:31:58,332 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:31:58,339 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:31:58,354 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee0612f-e1eb-48fc-bb7f-a1dc24907a62/sv-benchmarks/c/eca-rers2012/Problem15_label14.c[2008,2021] [2021-11-23 02:31:58,628 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:31:58,646 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:31:58,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:58 WrapperNode [2021-11-23 02:31:58,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:31:58,647 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:31:58,648 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:31:58,648 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:31:58,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:58" (1/1) ... [2021-11-23 02:31:58,719 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:58" (1/1) ... [2021-11-23 02:31:58,926 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1758 [2021-11-23 02:31:58,926 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:31:58,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:31:58,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:31:58,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:31:58,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:58" (1/1) ... [2021-11-23 02:31:58,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:58" (1/1) ... [2021-11-23 02:31:58,996 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:58" (1/1) ... [2021-11-23 02:31:58,996 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:58" (1/1) ... [2021-11-23 02:31:59,097 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:58" (1/1) ... [2021-11-23 02:31:59,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:58" (1/1) ... [2021-11-23 02:31:59,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:58" (1/1) ... [2021-11-23 02:31:59,177 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:31:59,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:31:59,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:31:59,178 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:31:59,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:58" (1/1) ... [2021-11-23 02:31:59,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:31:59,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee0612f-e1eb-48fc-bb7f-a1dc24907a62/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:31:59,213 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee0612f-e1eb-48fc-bb7f-a1dc24907a62/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:31:59,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee0612f-e1eb-48fc-bb7f-a1dc24907a62/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:31:59,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:31:59,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:31:59,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:31:59,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:31:59,371 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:31:59,373 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:32:02,333 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:32:17,829 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:32:17,829 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:32:17,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:32:17 BoogieIcfgContainer [2021-11-23 02:32:17,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:32:17,834 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:32:17,834 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:32:17,840 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:32:17,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:31:57" (1/3) ... [2021-11-23 02:32:17,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11cbfbc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:32:17, skipping insertion in model container [2021-11-23 02:32:17,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:31:58" (2/3) ... [2021-11-23 02:32:17,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11cbfbc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:32:17, skipping insertion in model container [2021-11-23 02:32:17,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:32:17" (3/3) ... [2021-11-23 02:32:17,843 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label14.c [2021-11-23 02:32:17,852 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:32:17,852 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:32:17,918 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:32:17,928 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:32:17,928 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:32:17,951 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:32:17,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 02:32:17,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:17,958 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 02:32:17,959 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:32:17,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:17,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1808781738, now seen corresponding path program 1 times [2021-11-23 02:32:17,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:32:17,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573810637] [2021-11-23 02:32:17,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:17,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:32:18,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:32:18,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:32:18,158 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:32:18,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573810637] [2021-11-23 02:32:18,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573810637] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:32:18,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:32:18,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:32:18,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726109732] [2021-11-23 02:32:18,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:32:18,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:32:18,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:32:18,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:32:18,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:32:18,202 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 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) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:32:18,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:32:18,426 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2021-11-23 02:32:18,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:32:18,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) Word has length 5 [2021-11-23 02:32:18,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:32:18,437 INFO L225 Difference]: With dead ends: 23 [2021-11-23 02:32:18,437 INFO L226 Difference]: Without dead ends: 11 [2021-11-23 02:32:18,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:32:18,444 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:32:18,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:32:18,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-23 02:32:18,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2021-11-23 02:32:18,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:32:18,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-11-23 02:32:18,479 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 5 [2021-11-23 02:32:18,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:32:18,479 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-11-23 02:32:18,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:32:18,480 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-11-23 02:32:18,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 02:32:18,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:18,481 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2021-11-23 02:32:18,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:32:18,482 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:32:18,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:18,486 INFO L85 PathProgramCache]: Analyzing trace with hash 183890736, now seen corresponding path program 1 times [2021-11-23 02:32:18,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:32:18,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531341077] [2021-11-23 02:32:18,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:18,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:32:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:32:22,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:32:22,864 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:32:22,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531341077] [2021-11-23 02:32:22,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531341077] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:32:22,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439113868] [2021-11-23 02:32:22,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:22,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:32:22,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee0612f-e1eb-48fc-bb7f-a1dc24907a62/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:32:22,869 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee0612f-e1eb-48fc-bb7f-a1dc24907a62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:32:22,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee0612f-e1eb-48fc-bb7f-a1dc24907a62/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:32:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:32:23,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:32:23,120 INFO L286 TraceCheckSpWp]: Computing forward predicates...