./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem15_label20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31f2dec0-6bf9-4dc8-98c1-048c3aabb97b/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31f2dec0-6bf9-4dc8-98c1-048c3aabb97b/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31f2dec0-6bf9-4dc8-98c1-048c3aabb97b/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31f2dec0-6bf9-4dc8-98c1-048c3aabb97b/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem15_label20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31f2dec0-6bf9-4dc8-98c1-048c3aabb97b/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31f2dec0-6bf9-4dc8-98c1-048c3aabb97b/bin/utaipan-Xvt2sAort0 --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 536acb696ed94b995033527813aeda4f29ece00fad0635ae3527f772205996b1 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 20:19:31,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:19:31,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:19:31,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:19:31,080 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:19:31,084 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:19:31,087 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:19:31,091 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:19:31,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:19:31,100 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:19:31,102 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:19:31,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:19:31,104 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:19:31,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:19:31,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:19:31,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:19:31,107 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:19:31,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:19:31,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:19:31,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:19:31,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:19:31,115 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:19:31,116 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:19:31,117 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:19:31,120 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:19:31,121 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:19:31,121 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:19:31,122 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:19:31,122 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:19:31,123 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:19:31,124 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:19:31,124 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:19:31,125 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:19:31,126 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:19:31,127 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:19:31,127 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:19:31,128 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:19:31,128 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:19:31,129 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:19:31,130 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:19:31,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:19:31,131 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31f2dec0-6bf9-4dc8-98c1-048c3aabb97b/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 20:19:31,156 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:19:31,156 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:19:31,157 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:19:31,157 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:19:31,158 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:19:31,158 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:19:31,158 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:19:31,158 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:19:31,159 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:19:31,159 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 20:19:31,159 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:19:31,159 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:19:31,159 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 20:19:31,159 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 20:19:31,160 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:19:31,160 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 20:19:31,160 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 20:19:31,160 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 20:19:31,161 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:19:31,161 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 20:19:31,161 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:19:31,162 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 20:19:31,162 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:19:31,162 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 20:19:31,162 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:19:31,162 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 20:19:31,162 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 20:19:31,163 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 20:19:31,163 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:19:31,163 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 20:19:31,163 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:19:31,163 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:19:31,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:19:31,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:19:31,164 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 20:19:31,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:19:31,164 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 20:19:31,165 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 20:19:31,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 20:19:31,165 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 20:19:31,165 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:19:31,165 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_31f2dec0-6bf9-4dc8-98c1-048c3aabb97b/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31f2dec0-6bf9-4dc8-98c1-048c3aabb97b/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 536acb696ed94b995033527813aeda4f29ece00fad0635ae3527f772205996b1 [2022-11-16 20:19:31,473 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:19:31,516 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:19:31,520 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:19:31,522 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:19:31,523 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:19:31,524 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31f2dec0-6bf9-4dc8-98c1-048c3aabb97b/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/eca-rers2012/Problem15_label20.c [2022-11-16 20:19:31,610 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31f2dec0-6bf9-4dc8-98c1-048c3aabb97b/bin/utaipan-Xvt2sAort0/data/a0cc66ce7/19bd1c8ba8c04c5cb5e3b8a9cf3f51fa/FLAGb4ad4ba4f [2022-11-16 20:19:32,354 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:19:32,354 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31f2dec0-6bf9-4dc8-98c1-048c3aabb97b/sv-benchmarks/c/eca-rers2012/Problem15_label20.c [2022-11-16 20:19:32,374 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31f2dec0-6bf9-4dc8-98c1-048c3aabb97b/bin/utaipan-Xvt2sAort0/data/a0cc66ce7/19bd1c8ba8c04c5cb5e3b8a9cf3f51fa/FLAGb4ad4ba4f [2022-11-16 20:19:32,501 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31f2dec0-6bf9-4dc8-98c1-048c3aabb97b/bin/utaipan-Xvt2sAort0/data/a0cc66ce7/19bd1c8ba8c04c5cb5e3b8a9cf3f51fa [2022-11-16 20:19:32,505 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:19:32,507 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:19:32,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:19:32,514 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:19:32,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:19:32,520 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:19:32" (1/1) ... [2022-11-16 20:19:32,521 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c736855 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:19:32, skipping insertion in model container [2022-11-16 20:19:32,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:19:32" (1/1) ... [2022-11-16 20:19:32,530 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:19:32,639 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:19:33,044 WARN L229 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_31f2dec0-6bf9-4dc8-98c1-048c3aabb97b/sv-benchmarks/c/eca-rers2012/Problem15_label20.c[5247,5260] [2022-11-16 20:19:33,659 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:19:33,677 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:19:33,737 WARN L229 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_31f2dec0-6bf9-4dc8-98c1-048c3aabb97b/sv-benchmarks/c/eca-rers2012/Problem15_label20.c[5247,5260] [2022-11-16 20:19:34,018 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:19:34,037 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:19:34,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:19:34 WrapperNode [2022-11-16 20:19:34,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:19:34,039 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:19:34,039 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:19:34,040 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:19:34,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:19:34" (1/1) ... [2022-11-16 20:19:34,092 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:19:34" (1/1) ... [2022-11-16 20:19:34,320 INFO L138 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1758 [2022-11-16 20:19:34,321 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:19:34,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:19:34,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:19:34,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:19:34,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:19:34" (1/1) ... [2022-11-16 20:19:34,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:19:34" (1/1) ... [2022-11-16 20:19:34,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:19:34" (1/1) ... [2022-11-16 20:19:34,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:19:34" (1/1) ... [2022-11-16 20:19:34,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:19:34" (1/1) ... [2022-11-16 20:19:34,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:19:34" (1/1) ... [2022-11-16 20:19:34,508 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:19:34" (1/1) ... [2022-11-16 20:19:34,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:19:34" (1/1) ... [2022-11-16 20:19:34,550 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:19:34,551 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:19:34,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:19:34,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:19:34,553 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:19:34" (1/1) ... [2022-11-16 20:19:34,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:19:34,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31f2dec0-6bf9-4dc8-98c1-048c3aabb97b/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:19:34,692 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31f2dec0-6bf9-4dc8-98c1-048c3aabb97b/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:19:34,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31f2dec0-6bf9-4dc8-98c1-048c3aabb97b/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:19:34,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:19:34,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 20:19:34,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:19:34,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:19:34,857 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:19:34,859 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:19:38,679 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:20:07,682 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:20:07,682 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 20:20:07,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:20:07 BoogieIcfgContainer [2022-11-16 20:20:07,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:20:07,686 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:20:07,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:20:07,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:20:07,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:19:32" (1/3) ... [2022-11-16 20:20:07,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@409cbdad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:20:07, skipping insertion in model container [2022-11-16 20:20:07,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:19:34" (2/3) ... [2022-11-16 20:20:07,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@409cbdad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:20:07, skipping insertion in model container [2022-11-16 20:20:07,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:20:07" (3/3) ... [2022-11-16 20:20:07,696 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label20.c [2022-11-16 20:20:07,717 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:20:07,718 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 20:20:07,820 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:20:07,831 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@27fb354c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:20:07,831 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 20:20:07,836 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) [2022-11-16 20:20:07,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 20:20:07,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:20:07,846 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 20:20:07,847 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:20:07,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:20:07,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1807995825, now seen corresponding path program 1 times [2022-11-16 20:20:07,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:20:07,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648055628] [2022-11-16 20:20:07,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:20:07,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:20:08,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:20:08,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:20:08,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:20:08,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648055628] [2022-11-16 20:20:08,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648055628] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:20:08,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:20:08,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 20:20:08,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79385458] [2022-11-16 20:20:08,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:20:08,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:20:08,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:20:08,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:20:08,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:20:08,300 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) [2022-11-16 20:20:08,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:20:08,749 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2022-11-16 20:20:08,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:20:08,752 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 [2022-11-16 20:20:08,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:20:08,764 INFO L225 Difference]: With dead ends: 23 [2022-11-16 20:20:08,764 INFO L226 Difference]: Without dead ends: 11 [2022-11-16 20:20:08,767 INFO L412 NwaCegarLoop]: 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 [2022-11-16 20:20:08,772 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 20:20:08,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 20:20:08,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-16 20:20:08,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2022-11-16 20:20:08,821 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) [2022-11-16 20:20:08,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2022-11-16 20:20:08,824 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 5 [2022-11-16 20:20:08,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:20:08,825 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2022-11-16 20:20:08,826 INFO L496 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) [2022-11-16 20:20:08,826 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2022-11-16 20:20:08,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 20:20:08,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:20:08,827 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2022-11-16 20:20:08,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 20:20:08,829 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:20:08,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:20:08,830 INFO L85 PathProgramCache]: Analyzing trace with hash 26861159, now seen corresponding path program 1 times [2022-11-16 20:20:08,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:20:08,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033402026] [2022-11-16 20:20:08,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:20:08,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:20:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat