./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/rlim_invariant.c.p+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/rlim_invariant.c.p+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8 --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 18b0d5e6a0e5bf3511d59ae2b1faedfad3abe1ea74492067ae408dc7e088829e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:10:04,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:10:04,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:10:04,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:10:04,677 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:10:04,681 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:10:04,683 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:10:04,686 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:10:04,689 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:10:04,694 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:10:04,695 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:10:04,697 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:10:04,697 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:10:04,700 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:10:04,703 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:10:04,712 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:10:04,714 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:10:04,715 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:10:04,717 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:10:04,726 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:10:04,728 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:10:04,729 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:10:04,733 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:10:04,734 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:10:04,743 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:10:04,743 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:10:04,743 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:10:04,746 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:10:04,746 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:10:04,748 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:10:04,749 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:10:04,749 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:10:04,751 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:10:04,752 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:10:04,754 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:10:04,754 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:10:04,755 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:10:04,755 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:10:04,755 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:10:04,756 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:10:04,757 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:10:04,758 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:10:04,812 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:10:04,812 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:10:04,814 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:10:04,814 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:10:04,814 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:10:04,815 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:10:04,815 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:10:04,815 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:10:04,821 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:10:04,822 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:10:04,823 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:10:04,823 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:10:04,823 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:10:04,823 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:10:04,824 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:10:04,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:10:04,825 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:10:04,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:10:04,825 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:10:04,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:10:04,827 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:10:04,832 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:10:04,832 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:10:04,833 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:10:04,833 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:10:04,833 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:10:04,833 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:10:04,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:10:04,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:10:04,834 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:10:04,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:10:04,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:10:04,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:10:04,836 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:10:04,836 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:10:04,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:10:04,836 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:10:04,836 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:10:04,837 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:10:04,837 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_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 18b0d5e6a0e5bf3511d59ae2b1faedfad3abe1ea74492067ae408dc7e088829e [2021-11-07 02:10:05,063 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:10:05,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:10:05,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:10:05,111 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:10:05,112 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:10:05,113 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/float-benchs/rlim_invariant.c.p+cfa-reducer.c [2021-11-07 02:10:05,192 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/data/02c6d994d/4bfc52a04b25407b91772f686cb7cb9c/FLAG3234887ce [2021-11-07 02:10:05,656 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:10:05,657 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/sv-benchmarks/c/float-benchs/rlim_invariant.c.p+cfa-reducer.c [2021-11-07 02:10:05,663 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/data/02c6d994d/4bfc52a04b25407b91772f686cb7cb9c/FLAG3234887ce [2021-11-07 02:10:06,057 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/data/02c6d994d/4bfc52a04b25407b91772f686cb7cb9c [2021-11-07 02:10:06,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:10:06,060 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:10:06,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:10:06,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:10:06,065 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:10:06,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:10:06" (1/1) ... [2021-11-07 02:10:06,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60efcec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:06, skipping insertion in model container [2021-11-07 02:10:06,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:10:06" (1/1) ... [2021-11-07 02:10:06,074 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:10:06,095 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:10:06,234 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/sv-benchmarks/c/float-benchs/rlim_invariant.c.p+cfa-reducer.c[1464,1477] [2021-11-07 02:10:06,252 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:10:06,260 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:10:06,276 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/sv-benchmarks/c/float-benchs/rlim_invariant.c.p+cfa-reducer.c[1464,1477] [2021-11-07 02:10:06,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:10:06,291 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:10:06,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:06 WrapperNode [2021-11-07 02:10:06,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:10:06,293 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:10:06,293 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:10:06,293 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:10:06,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:06" (1/1) ... [2021-11-07 02:10:06,308 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:06" (1/1) ... [2021-11-07 02:10:06,327 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:10:06,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:10:06,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:10:06,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:10:06,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:06" (1/1) ... [2021-11-07 02:10:06,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:06" (1/1) ... [2021-11-07 02:10:06,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:06" (1/1) ... [2021-11-07 02:10:06,338 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:06" (1/1) ... [2021-11-07 02:10:06,343 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:06" (1/1) ... [2021-11-07 02:10:06,346 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:06" (1/1) ... [2021-11-07 02:10:06,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:06" (1/1) ... [2021-11-07 02:10:06,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:10:06,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:10:06,350 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:10:06,350 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:10:06,351 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:06" (1/1) ... [2021-11-07 02:10:06,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:10:06,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:10:06,402 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:10:06,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:10:06,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 02:10:06,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:10:06,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:10:06,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:10:06,784 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:10:06,784 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 02:10:06,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:10:06 BoogieIcfgContainer [2021-11-07 02:10:06,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:10:06,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:10:06,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:10:06,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:10:06,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:10:06" (1/3) ... [2021-11-07 02:10:06,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@313723f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:10:06, skipping insertion in model container [2021-11-07 02:10:06,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:06" (2/3) ... [2021-11-07 02:10:06,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@313723f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:10:06, skipping insertion in model container [2021-11-07 02:10:06,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:10:06" (3/3) ... [2021-11-07 02:10:06,794 INFO L111 eAbstractionObserver]: Analyzing ICFG rlim_invariant.c.p+cfa-reducer.c [2021-11-07 02:10:06,799 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:10:06,799 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 02:10:06,846 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:10:06,852 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 [2021-11-07 02:10:06,854 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 02:10:06,867 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 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) [2021-11-07 02:10:06,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 02:10:06,871 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:06,872 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:06,872 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:10:06,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:06,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1394921896, now seen corresponding path program 1 times [2021-11-07 02:10:06,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:10:06,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166958829] [2021-11-07 02:10:06,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:06,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:10:06,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:07,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:07,064 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:10:07,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166958829] [2021-11-07 02:10:07,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166958829] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:07,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:07,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 02:10:07,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921917261] [2021-11-07 02:10:07,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:10:07,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:10:07,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:10:07,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:10:07,087 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 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 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2021-11-07 02:10:07,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:07,213 INFO L93 Difference]: Finished difference Result 89 states and 129 transitions. [2021-11-07 02:10:07,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:10:07,215 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 13 [2021-11-07 02:10:07,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:07,223 INFO L225 Difference]: With dead ends: 89 [2021-11-07 02:10:07,223 INFO L226 Difference]: Without dead ends: 73 [2021-11-07 02:10:07,226 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:10:07,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-07 02:10:07,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 19. [2021-11-07 02:10:07,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 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) [2021-11-07 02:10:07,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2021-11-07 02:10:07,281 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 13 [2021-11-07 02:10:07,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:07,290 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2021-11-07 02:10:07,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2021-11-07 02:10:07,291 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2021-11-07 02:10:07,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 02:10:07,291 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:07,291 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:07,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 02:10:07,293 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:10:07,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:07,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1411932557, now seen corresponding path program 1 times [2021-11-07 02:10:07,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:10:07,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468640366] [2021-11-07 02:10:07,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:07,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:10:07,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 02:10:07,347 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 02:10:07,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 02:10:07,403 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-07 02:10:07,403 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-07 02:10:07,405 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 02:10:07,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 02:10:07,410 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1] [2021-11-07 02:10:07,413 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 02:10:07,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 02:10:07 BoogieIcfgContainer [2021-11-07 02:10:07,439 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 02:10:07,440 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 02:10:07,440 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 02:10:07,440 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 02:10:07,440 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:10:06" (3/4) ... [2021-11-07 02:10:07,443 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 02:10:07,443 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 02:10:07,445 INFO L168 Benchmark]: Toolchain (without parser) took 1383.78 ms. Allocated memory was 79.7 MB in the beginning and 96.5 MB in the end (delta: 16.8 MB). Free memory was 42.9 MB in the beginning and 65.8 MB in the end (delta: -22.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:10:07,446 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 79.7 MB. Free memory is still 59.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:10:07,447 INFO L168 Benchmark]: CACSL2BoogieTranslator took 230.28 ms. Allocated memory was 79.7 MB in the beginning and 96.5 MB in the end (delta: 16.8 MB). Free memory was 42.7 MB in the beginning and 73.9 MB in the end (delta: -31.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 02:10:07,447 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.14 ms. Allocated memory is still 96.5 MB. Free memory was 73.9 MB in the beginning and 72.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:10:07,448 INFO L168 Benchmark]: Boogie Preprocessor took 20.76 ms. Allocated memory is still 96.5 MB. Free memory was 72.3 MB in the beginning and 71.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 02:10:07,449 INFO L168 Benchmark]: RCFGBuilder took 437.11 ms. Allocated memory is still 96.5 MB. Free memory was 71.2 MB in the beginning and 59.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 02:10:07,455 INFO L168 Benchmark]: TraceAbstraction took 650.91 ms. Allocated memory is still 96.5 MB. Free memory was 58.7 MB in the beginning and 66.2 MB in the end (delta: -7.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:10:07,455 INFO L168 Benchmark]: Witness Printer took 3.98 ms. Allocated memory is still 96.5 MB. Free memory was 66.2 MB in the beginning and 65.8 MB in the end (delta: 345.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:10:07,459 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 79.7 MB. Free memory is still 59.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 230.28 ms. Allocated memory was 79.7 MB in the beginning and 96.5 MB in the end (delta: 16.8 MB). Free memory was 42.7 MB in the beginning and 73.9 MB in the end (delta: -31.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.14 ms. Allocated memory is still 96.5 MB. Free memory was 73.9 MB in the beginning and 72.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.76 ms. Allocated memory is still 96.5 MB. Free memory was 72.3 MB in the beginning and 71.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 437.11 ms. Allocated memory is still 96.5 MB. Free memory was 71.2 MB in the beginning and 59.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 650.91 ms. Allocated memory is still 96.5 MB. Free memory was 58.7 MB in the beginning and 66.2 MB in the end (delta: -7.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 3.98 ms. Allocated memory is still 96.5 MB. Free memory was 66.2 MB in the beginning and 65.8 MB in the end (delta: 345.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 66]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 48, overapproximation of someBinaryDOUBLEComparisonOperation at line 53, overapproximation of to_real at line 20, overapproximation of someBinaryArithmeticFLOAToperation at line 47. Possible FailurePath: [L1] int __return_main; [L14] float main__X; [L15] float main__Y; [L16] float main__S; [L17] float main__R; [L18] float main__D; [L19] int main__i; [L20] main__Y = 0 [L21] main__i = 0 VAL [__return_main=0] [L23] COND TRUE main__i < 100000 [L25] main__X = __VERIFIER_nondet_float() [L26] main__D = __VERIFIER_nondet_float() [L27] int main____CPAchecker_TMP_0; VAL [__return_main=0] [L28] COND TRUE main__X >= -128.0 VAL [__return_main=0] [L30] COND TRUE main__X <= 128.0 [L32] main____CPAchecker_TMP_0 = 1 VAL [__return_main=0] [L34] COND TRUE main____CPAchecker_TMP_0 != 0 [L36] int main____CPAchecker_TMP_1; VAL [__return_main=0] [L37] COND TRUE main__D >= 0.0 VAL [__return_main=0] [L39] COND TRUE main__D <= 16.0 [L41] main____CPAchecker_TMP_1 = 1 VAL [__return_main=0] [L43] COND TRUE main____CPAchecker_TMP_1 != 0 [L45] main__S = main__Y [L46] main__Y = main__X [L47] main__R = main__X - main__S [L48] COND TRUE main__R <= (-main__D) [L50] main__Y = main__S - main__D [L52] int main____CPAchecker_TMP_2; VAL [__return_main=0] [L53] COND FALSE !(main__Y >= -129.0) VAL [__return_main=0] [L79] main____CPAchecker_TMP_2 = 0 VAL [__return_main=0] [L60] int __tmp_1; [L61] __tmp_1 = main____CPAchecker_TMP_2 [L62] int __VERIFIER_assert__cond; [L63] __VERIFIER_assert__cond = __tmp_1 VAL [__return_main=0] [L64] COND TRUE __VERIFIER_assert__cond == 0 VAL [__return_main=0] [L66] reach_error() VAL [__return_main=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 46 SDtfs, 120 SDslu, 99 SDs, 0 SdLazy, 31 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 54 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 20 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-07 02:10:07,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/rlim_invariant.c.p+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8 --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 18b0d5e6a0e5bf3511d59ae2b1faedfad3abe1ea74492067ae408dc7e088829e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:10:09,829 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:10:09,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:10:09,863 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:10:09,864 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:10:09,865 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:10:09,867 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:10:09,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:10:09,872 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:10:09,873 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:10:09,874 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:10:09,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:10:09,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:10:09,880 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:10:09,881 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:10:09,883 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:10:09,884 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:10:09,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:10:09,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:10:09,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:10:09,892 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:10:09,894 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:10:09,895 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:10:09,896 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:10:09,900 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:10:09,901 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:10:09,901 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:10:09,902 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:10:09,903 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:10:09,904 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:10:09,905 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:10:09,906 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:10:09,907 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:10:09,908 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:10:09,909 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:10:09,910 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:10:09,911 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:10:09,911 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:10:09,911 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:10:09,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:10:09,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:10:09,915 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:10:09,941 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:10:09,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:10:09,943 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:10:09,943 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:10:09,944 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:10:09,944 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:10:09,944 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:10:09,945 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:10:09,945 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:10:09,946 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:10:09,946 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:10:09,946 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:10:09,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:10:09,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:10:09,947 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:10:09,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:10:09,947 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:10:09,948 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:10:09,948 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:10:09,948 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:10:09,949 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:10:09,949 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:10:09,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:10:09,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:10:09,950 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:10:09,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:10:09,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:10:09,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:10:09,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:10:09,951 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:10:09,951 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:10:09,952 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:09,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:10:09,952 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:10:09,952 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:10:09,953 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 18b0d5e6a0e5bf3511d59ae2b1faedfad3abe1ea74492067ae408dc7e088829e [2021-11-07 02:10:10,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:10:10,333 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:10:10,335 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:10:10,336 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:10:10,337 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:10:10,338 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/float-benchs/rlim_invariant.c.p+cfa-reducer.c [2021-11-07 02:10:10,409 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/data/baef1cead/400bb84b07024d3f99df71e71b6e2e54/FLAGfb89a2f12 [2021-11-07 02:10:10,873 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:10:10,874 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/sv-benchmarks/c/float-benchs/rlim_invariant.c.p+cfa-reducer.c [2021-11-07 02:10:10,886 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/data/baef1cead/400bb84b07024d3f99df71e71b6e2e54/FLAGfb89a2f12 [2021-11-07 02:10:11,272 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/data/baef1cead/400bb84b07024d3f99df71e71b6e2e54 [2021-11-07 02:10:11,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:10:11,279 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:10:11,281 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:10:11,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:10:11,285 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:10:11,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:10:11" (1/1) ... [2021-11-07 02:10:11,289 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a294fce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:11, skipping insertion in model container [2021-11-07 02:10:11,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:10:11" (1/1) ... [2021-11-07 02:10:11,297 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:10:11,321 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:10:11,529 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/sv-benchmarks/c/float-benchs/rlim_invariant.c.p+cfa-reducer.c[1464,1477] [2021-11-07 02:10:11,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:10:11,565 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:10:11,602 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/sv-benchmarks/c/float-benchs/rlim_invariant.c.p+cfa-reducer.c[1464,1477] [2021-11-07 02:10:11,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:10:11,620 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:10:11,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:11 WrapperNode [2021-11-07 02:10:11,621 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:10:11,622 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:10:11,622 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:10:11,622 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:10:11,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:11" (1/1) ... [2021-11-07 02:10:11,649 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:11" (1/1) ... [2021-11-07 02:10:11,675 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:10:11,676 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:10:11,676 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:10:11,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:10:11,683 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:11" (1/1) ... [2021-11-07 02:10:11,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:11" (1/1) ... [2021-11-07 02:10:11,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:11" (1/1) ... [2021-11-07 02:10:11,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:11" (1/1) ... [2021-11-07 02:10:11,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:11" (1/1) ... [2021-11-07 02:10:11,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:11" (1/1) ... [2021-11-07 02:10:11,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:11" (1/1) ... [2021-11-07 02:10:11,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:10:11,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:10:11,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:10:11,735 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:10:11,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:11" (1/1) ... [2021-11-07 02:10:11,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:10:11,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:10:11,767 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:10:11,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:10:11,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:10:11,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:10:11,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:10:11,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:10:12,911 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:10:12,911 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 02:10:12,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:10:12 BoogieIcfgContainer [2021-11-07 02:10:12,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:10:12,915 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:10:12,915 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:10:12,918 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:10:12,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:10:11" (1/3) ... [2021-11-07 02:10:12,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eab0a69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:10:12, skipping insertion in model container [2021-11-07 02:10:12,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:10:11" (2/3) ... [2021-11-07 02:10:12,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eab0a69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:10:12, skipping insertion in model container [2021-11-07 02:10:12,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:10:12" (3/3) ... [2021-11-07 02:10:12,921 INFO L111 eAbstractionObserver]: Analyzing ICFG rlim_invariant.c.p+cfa-reducer.c [2021-11-07 02:10:12,928 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:10:12,929 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 02:10:12,988 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:10:12,994 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 [2021-11-07 02:10:12,994 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 02:10:13,010 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 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) [2021-11-07 02:10:13,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 02:10:13,014 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:13,014 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:13,015 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:10:13,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:13,020 INFO L85 PathProgramCache]: Analyzing trace with hash -34829450, now seen corresponding path program 1 times [2021-11-07 02:10:13,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:13,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2097798855] [2021-11-07 02:10:13,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:13,032 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:13,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:13,036 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:13,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:10:13,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:13,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:10:13,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:13,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:13,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:13,378 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:13,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2097798855] [2021-11-07 02:10:13,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2097798855] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:13,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:13,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:10:13,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505467414] [2021-11-07 02:10:13,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:10:13,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:13,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:10:13,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:10:13,400 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 23 states have internal predecessors, (35), 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 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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) [2021-11-07 02:10:13,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:13,477 INFO L93 Difference]: Finished difference Result 71 states and 102 transitions. [2021-11-07 02:10:13,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:10:13,479 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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 16 [2021-11-07 02:10:13,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:13,486 INFO L225 Difference]: With dead ends: 71 [2021-11-07 02:10:13,487 INFO L226 Difference]: Without dead ends: 57 [2021-11-07 02:10:13,489 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:10:13,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-07 02:10:13,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 23. [2021-11-07 02:10:13,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 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) [2021-11-07 02:10:13,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-11-07 02:10:13,520 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 16 [2021-11-07 02:10:13,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:13,521 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-11-07 02:10:13,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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) [2021-11-07 02:10:13,521 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-11-07 02:10:13,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 02:10:13,522 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:13,523 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:13,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:13,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:13,737 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:10:13,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:13,740 INFO L85 PathProgramCache]: Analyzing trace with hash -17818789, now seen corresponding path program 1 times [2021-11-07 02:10:13,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:13,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057071057] [2021-11-07 02:10:13,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:13,744 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:13,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:13,745 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:13,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:10:13,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:13,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:10:13,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:20,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:20,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:14,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:11:14,455 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:14,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057071057] [2021-11-07 02:11:14,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057071057] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:14,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:14,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-07 02:11:14,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716921349] [2021-11-07 02:11:14,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 02:11:14,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:14,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 02:11:14,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=70, Unknown=6, NotChecked=0, Total=110 [2021-11-07 02:11:14,459 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 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) [2021-11-07 02:11:59,565 WARN L207 SmtUtils]: Spent 15.78 s on a formula simplification that was a NOOP. DAG size: 30 [2021-11-07 02:12:19,847 WARN L207 SmtUtils]: Spent 6.52 s on a formula simplification that was a NOOP. DAG size: 21 [2021-11-07 02:15:57,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:57,275 INFO L93 Difference]: Finished difference Result 129 states and 168 transitions. [2021-11-07 02:15:57,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:15:57,285 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 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 16 [2021-11-07 02:15:57,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:57,290 INFO L225 Difference]: With dead ends: 129 [2021-11-07 02:15:57,290 INFO L226 Difference]: Without dead ends: 108 [2021-11-07 02:15:57,291 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 91.8s TimeCoverageRelationStatistics Valid=83, Invalid=175, Unknown=14, NotChecked=0, Total=272 [2021-11-07 02:15:57,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-07 02:15:57,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 35. [2021-11-07 02:15:57,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 states have internal predecessors, (48), 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) [2021-11-07 02:15:57,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 48 transitions. [2021-11-07 02:15:57,305 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 48 transitions. Word has length 16 [2021-11-07 02:15:57,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:57,306 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 48 transitions. [2021-11-07 02:15:57,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 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) [2021-11-07 02:15:57,306 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 48 transitions. [2021-11-07 02:15:57,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:15:57,307 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:57,307 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:15:57,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:57,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:57,513 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:15:57,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:57,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1069421883, now seen corresponding path program 1 times [2021-11-07 02:15:57,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:57,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899454267] [2021-11-07 02:15:57,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:57,515 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:57,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:57,528 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:57,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:15:57,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:57,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:15:57,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:05,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:14,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:17:14,962 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:14,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899454267] [2021-11-07 02:17:14,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899454267] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:14,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:14,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-07 02:17:14,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923513156] [2021-11-07 02:17:14,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 02:17:14,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:14,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 02:17:14,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=69, Unknown=7, NotChecked=0, Total=110 [2021-11-07 02:17:14,965 INFO L87 Difference]: Start difference. First operand 35 states and 48 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 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) [2021-11-07 02:19:03,850 WARN L207 SmtUtils]: Spent 20.21 s on a formula simplification that was a NOOP. DAG size: 28 [2021-11-07 02:21:48,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:48,841 INFO L93 Difference]: Finished difference Result 111 states and 147 transitions. [2021-11-07 02:21:48,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 02:21:48,849 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 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 17 [2021-11-07 02:21:48,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:48,850 INFO L225 Difference]: With dead ends: 111 [2021-11-07 02:21:48,851 INFO L226 Difference]: Without dead ends: 90 [2021-11-07 02:21:48,852 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 87.3s TimeCoverageRelationStatistics Valid=68, Invalid=128, Unknown=14, NotChecked=0, Total=210 [2021-11-07 02:21:48,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-07 02:21:48,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 41. [2021-11-07 02:21:48,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.425) internal successors, (57), 40 states have internal predecessors, (57), 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) [2021-11-07 02:21:48,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 57 transitions. [2021-11-07 02:21:48,859 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 57 transitions. Word has length 17 [2021-11-07 02:21:48,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:48,860 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 57 transitions. [2021-11-07 02:21:48,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 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) [2021-11-07 02:21:48,860 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 57 transitions. [2021-11-07 02:21:48,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:21:48,861 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:48,861 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:21:48,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:49,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:49,062 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:21:49,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:49,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1450538051, now seen corresponding path program 1 times [2021-11-07 02:21:49,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:49,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1056154858] [2021-11-07 02:21:49,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:49,064 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:49,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:49,066 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:49,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:21:49,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:49,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:21:49,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:53,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:53,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:00,140 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:00,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1056154858] [2021-11-07 02:22:00,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1056154858] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:00,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:00,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:22:00,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247650541] [2021-11-07 02:22:00,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:22:00,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:00,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:22:00,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:22:00,143 INFO L87 Difference]: Start difference. First operand 41 states and 57 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 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) [2021-11-07 02:22:39,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:39,799 INFO L93 Difference]: Finished difference Result 192 states and 259 transitions. [2021-11-07 02:22:39,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:22:39,812 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 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 17 [2021-11-07 02:22:39,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:39,814 INFO L225 Difference]: With dead ends: 192 [2021-11-07 02:22:39,814 INFO L226 Difference]: Without dead ends: 171 [2021-11-07 02:22:39,815 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:22:39,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-07 02:22:39,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 84. [2021-11-07 02:22:39,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.4457831325301205) internal successors, (120), 83 states have internal predecessors, (120), 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) [2021-11-07 02:22:39,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 120 transitions. [2021-11-07 02:22:39,835 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 120 transitions. Word has length 17 [2021-11-07 02:22:39,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:39,836 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 120 transitions. [2021-11-07 02:22:39,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 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) [2021-11-07 02:22:39,836 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 120 transitions. [2021-11-07 02:22:39,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:22:39,838 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:39,838 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:39,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-07 02:22:40,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:40,052 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:22:40,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:40,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1069229389, now seen corresponding path program 1 times [2021-11-07 02:22:40,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:40,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1081767191] [2021-11-07 02:22:40,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:40,054 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:40,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:40,055 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:40,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6047eba0-e4d1-4c9e-97dd-236d0dc79fc0/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:22:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:40,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:22:40,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:52,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:52,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:12,274 WARN L207 SmtUtils]: Spent 6.66 s on a formula simplification. DAG size of input: 17 DAG size of output: 12 [2021-11-07 02:23:43,622 WARN L207 SmtUtils]: Spent 5.48 s on a formula simplification that was a NOOP. DAG size: 17 [2021-11-07 02:24:41,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:41,839 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:41,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1081767191] [2021-11-07 02:24:41,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1081767191] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:41,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:41,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 8] imperfect sequences [] total 14 [2021-11-07 02:24:41,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443660283] [2021-11-07 02:24:41,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 02:24:41,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:41,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 02:24:41,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=121, Unknown=5, NotChecked=0, Total=182 [2021-11-07 02:24:41,841 INFO L87 Difference]: Start difference. First operand 84 states and 120 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 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)