./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem11_label12.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_91e42d3f-74b0-4f9f-8a90-8fcf219fe424/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e42d3f-74b0-4f9f-8a90-8fcf219fe424/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_91e42d3f-74b0-4f9f-8a90-8fcf219fe424/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e42d3f-74b0-4f9f-8a90-8fcf219fe424/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem11_label12.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e42d3f-74b0-4f9f-8a90-8fcf219fe424/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_91e42d3f-74b0-4f9f-8a90-8fcf219fe424/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 ffbcc3b4e73f8ad55a0649493c69e3be3f48518c4d71790476a2cf0516dec892 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:48:55,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:48:55,813 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:48:55,868 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:48:55,870 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:48:55,876 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:48:55,878 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:48:55,881 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:48:55,883 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:48:55,884 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:48:55,886 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:48:55,887 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:48:55,888 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:48:55,889 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:48:55,890 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:48:55,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:48:55,898 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:48:55,901 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:48:55,904 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:48:55,909 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:48:55,913 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:48:55,916 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:48:55,923 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:48:55,925 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:48:55,928 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:48:55,930 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:48:55,931 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:48:55,933 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:48:55,934 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:48:55,935 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:48:55,936 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:48:55,937 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:48:55,938 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:48:55,939 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:48:55,940 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:48:55,940 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:48:55,941 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:48:55,942 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:48:55,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:48:55,943 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:48:55,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:48:55,944 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e42d3f-74b0-4f9f-8a90-8fcf219fe424/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:48:55,975 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:48:55,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:48:55,975 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:48:55,976 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:48:55,976 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:48:55,977 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:48:55,977 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:48:55,977 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:48:55,977 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:48:55,978 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:48:55,978 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:48:55,978 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:48:55,990 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:48:55,991 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:48:55,991 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:48:55,991 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:48:55,991 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:48:55,992 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:48:55,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:48:55,993 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:48:55,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:48:55,994 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:48:55,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:48:55,994 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:48:55,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:48:55,995 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:48:55,997 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:48:55,997 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:48:55,998 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:48:55,998 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:48:55,999 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:48:55,999 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:48:55,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:48:55,999 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:48:56,000 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:48:56,000 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:48:56,001 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:48:56,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:48:56,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:48:56,002 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:48:56,002 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:48:56,002 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_91e42d3f-74b0-4f9f-8a90-8fcf219fe424/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e42d3f-74b0-4f9f-8a90-8fcf219fe424/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ffbcc3b4e73f8ad55a0649493c69e3be3f48518c4d71790476a2cf0516dec892 [2021-11-23 02:48:56,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:48:56,312 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:48:56,315 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:48:56,316 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:48:56,317 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:48:56,318 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e42d3f-74b0-4f9f-8a90-8fcf219fe424/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/eca-rers2012/Problem11_label12.c [2021-11-23 02:48:56,402 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e42d3f-74b0-4f9f-8a90-8fcf219fe424/bin/utaipan-EQgc7hIp5V/data/549f72f8d/70d4e6db4fd74066a3566bcdac50233e/FLAGcc1fc451c [2021-11-23 02:48:57,066 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:48:57,066 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e42d3f-74b0-4f9f-8a90-8fcf219fe424/sv-benchmarks/c/eca-rers2012/Problem11_label12.c [2021-11-23 02:48:57,089 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e42d3f-74b0-4f9f-8a90-8fcf219fe424/bin/utaipan-EQgc7hIp5V/data/549f72f8d/70d4e6db4fd74066a3566bcdac50233e/FLAGcc1fc451c [2021-11-23 02:48:57,248 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e42d3f-74b0-4f9f-8a90-8fcf219fe424/bin/utaipan-EQgc7hIp5V/data/549f72f8d/70d4e6db4fd74066a3566bcdac50233e [2021-11-23 02:48:57,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:48:57,252 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:48:57,257 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:48:57,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:48:57,261 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:48:57,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:48:57" (1/1) ... [2021-11-23 02:48:57,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55b4d3eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:57, skipping insertion in model container [2021-11-23 02:48:57,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:48:57" (1/1) ... [2021-11-23 02:48:57,273 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:48:57,343 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:48:57,634 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_91e42d3f-74b0-4f9f-8a90-8fcf219fe424/sv-benchmarks/c/eca-rers2012/Problem11_label12.c[3684,3697] [2021-11-23 02:48:57,996 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:48:58,005 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:48:58,035 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_91e42d3f-74b0-4f9f-8a90-8fcf219fe424/sv-benchmarks/c/eca-rers2012/Problem11_label12.c[3684,3697] [2021-11-23 02:48:58,364 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:48:58,381 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:48:58,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:58 WrapperNode [2021-11-23 02:48:58,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:48:58,383 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:48:58,383 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:48:58,383 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:48:58,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:58" (1/1) ... [2021-11-23 02:48:58,434 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:58" (1/1) ... [2021-11-23 02:48:58,562 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 999 [2021-11-23 02:48:58,563 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:48:58,564 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:48:58,564 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:48:58,564 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:48:58,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:58" (1/1) ... [2021-11-23 02:48:58,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:58" (1/1) ... [2021-11-23 02:48:58,584 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:58" (1/1) ... [2021-11-23 02:48:58,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:58" (1/1) ... [2021-11-23 02:48:58,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:58" (1/1) ... [2021-11-23 02:48:58,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:58" (1/1) ... [2021-11-23 02:48:58,674 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:58" (1/1) ... [2021-11-23 02:48:58,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:48:58,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:48:58,692 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:48:58,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:48:58,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:58" (1/1) ... [2021-11-23 02:48:58,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:48:58,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e42d3f-74b0-4f9f-8a90-8fcf219fe424/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:48:58,736 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e42d3f-74b0-4f9f-8a90-8fcf219fe424/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:48:58,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e42d3f-74b0-4f9f-8a90-8fcf219fe424/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:48:58,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:48:58,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:48:58,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:48:58,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:48:58,870 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:48:58,872 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:49:00,640 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:49:05,698 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:49:05,698 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:49:05,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:49:05 BoogieIcfgContainer [2021-11-23 02:49:05,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:49:05,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:49:05,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:49:05,708 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:49:05,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:48:57" (1/3) ... [2021-11-23 02:49:05,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68f0fbde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:49:05, skipping insertion in model container [2021-11-23 02:49:05,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:58" (2/3) ... [2021-11-23 02:49:05,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68f0fbde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:49:05, skipping insertion in model container [2021-11-23 02:49:05,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:49:05" (3/3) ... [2021-11-23 02:49:05,712 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem11_label12.c [2021-11-23 02:49:05,718 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:49:05,719 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:49:05,776 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:49:05,784 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 02:49:05,785 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:49:05,800 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 02:49:05,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 02:49:05,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:05,807 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 02:49:05,808 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:49:05,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:05,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1190292386, now seen corresponding path program 1 times [2021-11-23 02:49:05,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:49:05,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617430866] [2021-11-23 02:49:05,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:05,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:49:05,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:06,019 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 02:49:06,019 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:49:06,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617430866] [2021-11-23 02:49:06,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617430866] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:06,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:49:06,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:49:06,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879122347] [2021-11-23 02:49:06,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:06,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:49:06,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:49:06,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:49:06,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:49:06,066 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 02:49:06,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:06,194 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2021-11-23 02:49:06,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:49:06,196 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 02:49:06,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:06,205 INFO L225 Difference]: With dead ends: 23 [2021-11-23 02:49:06,206 INFO L226 Difference]: Without dead ends: 11 [2021-11-23 02:49:06,209 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 02:49:06,214 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:06,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:49:06,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-23 02:49:06,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2021-11-23 02:49:06,249 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 02:49:06,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-11-23 02:49:06,252 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 5 [2021-11-23 02:49:06,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:06,252 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-11-23 02:49:06,253 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 02:49:06,253 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-11-23 02:49:06,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 02:49:06,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:06,254 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2021-11-23 02:49:06,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:49:06,255 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:49:06,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:06,256 INFO L85 PathProgramCache]: Analyzing trace with hash -954596150, now seen corresponding path program 1 times [2021-11-23 02:49:06,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:49:06,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357909533] [2021-11-23 02:49:06,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:06,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:49:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:07,325 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 02:49:07,325 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:49:07,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357909533] [2021-11-23 02:49:07,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357909533] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:49:07,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221630021] [2021-11-23 02:49:07,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:07,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:49:07,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e42d3f-74b0-4f9f-8a90-8fcf219fe424/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:49:07,331 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e42d3f-74b0-4f9f-8a90-8fcf219fe424/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:49:07,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e42d3f-74b0-4f9f-8a90-8fcf219fe424/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:49:07,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:07,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 02:49:07,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:12,428 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 02:49:12,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:50:11,469 WARN L227 SmtUtils]: Spent 57.26s on a formula simplification. DAG size of input: 4102 DAG size of output: 4100 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:54:31,248 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-23 02:54:31,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1115239133] [2021-11-23 02:54:31,273 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-23 02:54:31,273 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:54:31,278 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:54:31,285 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:54:31,286 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:54:32,813 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 20 [2021-11-23 02:54:33,506 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 18222 conjuctions. This might take some time... [2021-11-23 02:54:35,375 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 516 conjuctions. [2021-11-23 02:54:35,400 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 20 [2021-11-23 02:54:35,787 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 18222 conjuctions. This might take some time... [2021-11-23 02:54:37,559 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 516 conjuctions. [2021-11-23 02:54:43,599 WARN L227 SmtUtils]: Spent 5.80s on a formula simplification that was a NOOP. DAG size: 415 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2021-11-23 02:54:49,366 WARN L227 SmtUtils]: Spent 5.76s on a formula simplification that was a NOOP. DAG size: 415 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2021-11-23 02:55:29,340 WARN L227 SmtUtils]: Spent 13.04s on a formula simplification that was a NOOP. DAG size: 547 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2021-11-23 02:55:40,572 WARN L227 SmtUtils]: Spent 11.23s on a formula simplification that was a NOOP. DAG size: 547 (called from [L 211] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)