./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P --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 bd1fbff4a3c3c5ec96d6304a0f1ce261a19e0a6955e4877484b605d93c4e6183 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:47:15,093 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:47:15,095 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:47:15,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:47:15,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:47:15,135 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:47:15,137 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:47:15,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:47:15,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:47:15,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:47:15,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:47:15,145 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:47:15,145 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:47:15,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:47:15,148 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:47:15,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:47:15,150 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:47:15,151 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:47:15,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:47:15,155 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:47:15,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:47:15,163 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:47:15,164 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:47:15,165 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:47:15,168 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:47:15,169 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:47:15,169 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:47:15,170 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:47:15,171 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:47:15,172 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:47:15,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:47:15,173 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:47:15,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:47:15,175 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:47:15,176 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:47:15,176 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:47:15,185 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:47:15,185 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:47:15,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:47:15,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:47:15,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:47:15,188 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:47:15,237 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:47:15,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:47:15,238 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:47:15,239 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:47:15,239 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:47:15,240 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:47:15,240 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:47:15,240 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:47:15,240 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:47:15,240 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:47:15,241 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:47:15,241 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:47:15,241 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:47:15,241 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:47:15,242 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:47:15,242 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:47:15,242 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:47:15,242 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:47:15,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:47:15,243 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:47:15,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:47:15,244 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:47:15,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:47:15,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:47:15,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:47:15,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:47:15,245 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:47:15,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:47:15,245 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:47:15,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:47:15,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:47:15,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:47:15,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:47:15,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:47:15,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:47:15,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:47:15,247 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:47:15,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:47:15,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:47:15,248 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:47:15,248 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:47:15,248 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_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bd1fbff4a3c3c5ec96d6304a0f1ce261a19e0a6955e4877484b605d93c4e6183 [2021-11-21 00:47:15,519 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:47:15,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:47:15,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:47:15,543 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:47:15,544 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:47:15,545 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c [2021-11-21 00:47:15,603 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/data/6d4fc05a0/eb1ad3f08fc5423da052cbbe3030a3d7/FLAGe54466f02 [2021-11-21 00:47:16,131 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:47:16,132 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c [2021-11-21 00:47:16,144 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/data/6d4fc05a0/eb1ad3f08fc5423da052cbbe3030a3d7/FLAGe54466f02 [2021-11-21 00:47:16,438 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/data/6d4fc05a0/eb1ad3f08fc5423da052cbbe3030a3d7 [2021-11-21 00:47:16,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:47:16,442 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:47:16,453 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:47:16,453 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:47:16,459 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:47:16,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:47:16" (1/1) ... [2021-11-21 00:47:16,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@144d5666 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:16, skipping insertion in model container [2021-11-21 00:47:16,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:47:16" (1/1) ... [2021-11-21 00:47:16,469 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:47:16,504 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:47:16,708 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c[1998,2011] [2021-11-21 00:47:16,713 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c[2392,2405] [2021-11-21 00:47:16,782 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:47:16,793 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:47:16,809 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c[1998,2011] [2021-11-21 00:47:16,810 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c[2392,2405] [2021-11-21 00:47:16,838 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:47:16,851 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:47:16,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:16 WrapperNode [2021-11-21 00:47:16,852 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:47:16,853 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:47:16,853 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:47:16,853 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:47:16,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:16" (1/1) ... [2021-11-21 00:47:16,870 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:16" (1/1) ... [2021-11-21 00:47:16,896 INFO L137 Inliner]: procedures = 27, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 169 [2021-11-21 00:47:16,897 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:47:16,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:47:16,898 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:47:16,898 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:47:16,906 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:16" (1/1) ... [2021-11-21 00:47:16,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:16" (1/1) ... [2021-11-21 00:47:16,908 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:16" (1/1) ... [2021-11-21 00:47:16,909 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:16" (1/1) ... [2021-11-21 00:47:16,916 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:16" (1/1) ... [2021-11-21 00:47:16,929 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:16" (1/1) ... [2021-11-21 00:47:16,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:16" (1/1) ... [2021-11-21 00:47:16,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:47:16,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:47:16,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:47:16,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:47:16,950 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:16" (1/1) ... [2021-11-21 00:47:16,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:47:16,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:47:16,990 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:47:17,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:47:17,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:47:17,037 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-11-21 00:47:17,037 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-11-21 00:47:17,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:47:17,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:47:17,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:47:17,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 00:47:17,038 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 00:47:17,141 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:47:17,143 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:47:17,417 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:47:17,634 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:47:17,634 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 00:47:17,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:47:17 BoogieIcfgContainer [2021-11-21 00:47:17,637 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:47:17,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:47:17,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:47:17,642 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:47:17,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:47:16" (1/3) ... [2021-11-21 00:47:17,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73b2ae29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:47:17, skipping insertion in model container [2021-11-21 00:47:17,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:16" (2/3) ... [2021-11-21 00:47:17,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73b2ae29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:47:17, skipping insertion in model container [2021-11-21 00:47:17,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:47:17" (3/3) ... [2021-11-21 00:47:17,646 INFO L111 eAbstractionObserver]: Analyzing ICFG square_5+soft_float_1-2a.c.cil.c [2021-11-21 00:47:17,651 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:47:17,651 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-21 00:47:17,706 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:47:17,713 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 [2021-11-21 00:47:17,713 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-21 00:47:17,731 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 42 states have internal predecessors, (59), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-21 00:47:17,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-21 00:47:17,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:47:17,736 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-21 00:47:17,737 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:47:17,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:47:17,750 INFO L85 PathProgramCache]: Analyzing trace with hash 9849864, now seen corresponding path program 1 times [2021-11-21 00:47:17,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:47:17,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733832917] [2021-11-21 00:47:17,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:17,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:47:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 00:47:17,865 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-21 00:47:17,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 00:47:17,894 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-21 00:47:17,895 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-21 00:47:17,897 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-21 00:47:17,898 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-21 00:47:17,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:47:17,903 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-21 00:47:17,906 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 00:47:17,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 12:47:17 BoogieIcfgContainer [2021-11-21 00:47:17,923 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 00:47:17,924 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 00:47:17,924 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 00:47:17,925 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 00:47:17,925 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:47:17" (3/4) ... [2021-11-21 00:47:17,928 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-21 00:47:17,928 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 00:47:17,929 INFO L158 Benchmark]: Toolchain (without parser) took 1486.56ms. Allocated memory is still 107.0MB. Free memory was 67.0MB in the beginning and 78.8MB in the end (delta: -11.8MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:47:17,930 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 107.0MB. Free memory is still 84.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:47:17,930 INFO L158 Benchmark]: CACSL2BoogieTranslator took 399.39ms. Allocated memory is still 107.0MB. Free memory was 66.8MB in the beginning and 78.0MB in the end (delta: -11.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 00:47:17,931 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.85ms. Allocated memory is still 107.0MB. Free memory was 78.0MB in the beginning and 75.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:47:17,932 INFO L158 Benchmark]: Boogie Preprocessor took 47.71ms. Allocated memory is still 107.0MB. Free memory was 75.9MB in the beginning and 74.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:47:17,932 INFO L158 Benchmark]: RCFGBuilder took 691.49ms. Allocated memory is still 107.0MB. Free memory was 74.2MB in the beginning and 52.0MB in the end (delta: 22.2MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2021-11-21 00:47:17,933 INFO L158 Benchmark]: TraceAbstraction took 284.82ms. Allocated memory is still 107.0MB. Free memory was 51.5MB in the beginning and 79.2MB in the end (delta: -27.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:47:17,934 INFO L158 Benchmark]: Witness Printer took 4.03ms. Allocated memory is still 107.0MB. Free memory was 79.2MB in the beginning and 78.8MB in the end (delta: 428.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:47:17,937 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 107.0MB. Free memory is still 84.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 399.39ms. Allocated memory is still 107.0MB. Free memory was 66.8MB in the beginning and 78.0MB in the end (delta: -11.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.85ms. Allocated memory is still 107.0MB. Free memory was 78.0MB in the beginning and 75.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 47.71ms. Allocated memory is still 107.0MB. Free memory was 75.9MB in the beginning and 74.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 691.49ms. Allocated memory is still 107.0MB. Free memory was 74.2MB in the beginning and 52.0MB in the end (delta: 22.2MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 284.82ms. Allocated memory is still 107.0MB. Free memory was 51.5MB in the beginning and 79.2MB in the end (delta: -27.7MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.03ms. Allocated memory is still 107.0MB. Free memory was 79.2MB in the beginning and 78.8MB in the end (delta: 428.7kB). There was no memory consumed. Max. memory is 16.1GB. * 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: 48]: 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 47, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L403] COND TRUE __VERIFIER_nondet_int() [L404] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; VAL [IN=49, x=49] [L47] COND TRUE !(result >= 0.0f && result < 1.3985f) VAL [IN=49, x=49] [L48] reach_error() VAL [IN=49, x=49] - UnprovableResult [Line: 61]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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 [2021-11-21 00:47:17,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/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_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P --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 bd1fbff4a3c3c5ec96d6304a0f1ce261a19e0a6955e4877484b605d93c4e6183 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:47:20,277 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:47:20,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:47:20,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:47:20,329 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:47:20,330 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:47:20,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:47:20,334 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:47:20,336 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:47:20,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:47:20,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:47:20,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:47:20,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:47:20,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:47:20,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:47:20,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:47:20,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:47:20,348 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:47:20,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:47:20,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:47:20,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:47:20,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:47:20,359 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:47:20,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:47:20,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:47:20,364 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:47:20,364 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:47:20,365 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:47:20,366 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:47:20,367 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:47:20,367 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:47:20,368 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:47:20,376 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:47:20,377 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:47:20,378 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:47:20,378 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:47:20,379 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:47:20,379 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:47:20,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:47:20,381 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:47:20,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:47:20,383 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-21 00:47:20,428 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:47:20,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:47:20,428 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:47:20,428 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:47:20,429 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:47:20,429 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:47:20,430 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:47:20,430 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:47:20,430 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:47:20,430 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:47:20,430 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:47:20,431 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:47:20,431 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:47:20,431 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:47:20,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:47:20,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:47:20,432 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:47:20,432 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:47:20,432 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:47:20,433 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 00:47:20,433 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 00:47:20,433 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:47:20,433 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:47:20,433 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:47:20,433 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:47:20,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:47:20,434 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 00:47:20,434 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:47:20,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:47:20,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:47:20,435 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:47:20,435 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:47:20,435 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 00:47:20,435 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 00:47:20,436 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:47:20,436 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:47:20,436 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:47:20,436 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_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bd1fbff4a3c3c5ec96d6304a0f1ce261a19e0a6955e4877484b605d93c4e6183 [2021-11-21 00:47:20,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:47:20,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:47:20,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:47:20,867 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:47:20,869 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:47:20,870 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c [2021-11-21 00:47:20,948 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/data/db7410a47/1e6a44366fce4dea965f2eb3ee5a2f62/FLAGa3049d98d [2021-11-21 00:47:21,482 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:47:21,483 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c [2021-11-21 00:47:21,503 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/data/db7410a47/1e6a44366fce4dea965f2eb3ee5a2f62/FLAGa3049d98d [2021-11-21 00:47:21,798 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/data/db7410a47/1e6a44366fce4dea965f2eb3ee5a2f62 [2021-11-21 00:47:21,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:47:21,802 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:47:21,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:47:21,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:47:21,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:47:21,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:47:21" (1/1) ... [2021-11-21 00:47:21,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@754695a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:21, skipping insertion in model container [2021-11-21 00:47:21,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:47:21" (1/1) ... [2021-11-21 00:47:21,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:47:21,864 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:47:22,066 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c[1998,2011] [2021-11-21 00:47:22,074 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c[2392,2405] [2021-11-21 00:47:22,200 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:47:22,222 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:47:22,238 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c[1998,2011] [2021-11-21 00:47:22,239 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/sv-benchmarks/c/combinations/square_5+soft_float_1-2a.c.cil.c[2392,2405] [2021-11-21 00:47:22,265 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:47:22,279 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:47:22,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:22 WrapperNode [2021-11-21 00:47:22,280 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:47:22,281 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:47:22,281 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:47:22,282 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:47:22,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:22" (1/1) ... [2021-11-21 00:47:22,302 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:22" (1/1) ... [2021-11-21 00:47:22,327 INFO L137 Inliner]: procedures = 28, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 165 [2021-11-21 00:47:22,328 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:47:22,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:47:22,329 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:47:22,329 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:47:22,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:22" (1/1) ... [2021-11-21 00:47:22,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:22" (1/1) ... [2021-11-21 00:47:22,342 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:22" (1/1) ... [2021-11-21 00:47:22,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:22" (1/1) ... [2021-11-21 00:47:22,351 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:22" (1/1) ... [2021-11-21 00:47:22,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:22" (1/1) ... [2021-11-21 00:47:22,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:22" (1/1) ... [2021-11-21 00:47:22,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:47:22,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:47:22,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:47:22,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:47:22,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:22" (1/1) ... [2021-11-21 00:47:22,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:47:22,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:47:22,395 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:47:22,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:47:22,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:47:22,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-21 00:47:22,432 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-11-21 00:47:22,433 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-11-21 00:47:22,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:47:22,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:47:22,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 00:47:22,433 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 00:47:22,511 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:47:22,512 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:47:25,074 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:47:25,080 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:47:25,081 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 00:47:25,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:47:25 BoogieIcfgContainer [2021-11-21 00:47:25,083 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:47:25,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:47:25,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:47:25,088 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:47:25,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:47:21" (1/3) ... [2021-11-21 00:47:25,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28cecc78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:47:25, skipping insertion in model container [2021-11-21 00:47:25,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:47:22" (2/3) ... [2021-11-21 00:47:25,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28cecc78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:47:25, skipping insertion in model container [2021-11-21 00:47:25,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:47:25" (3/3) ... [2021-11-21 00:47:25,091 INFO L111 eAbstractionObserver]: Analyzing ICFG square_5+soft_float_1-2a.c.cil.c [2021-11-21 00:47:25,096 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:47:25,097 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-21 00:47:25,146 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:47:25,153 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 [2021-11-21 00:47:25,154 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-21 00:47:25,173 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 68 states have (on average 1.588235294117647) internal successors, (108), 72 states have internal predecessors, (108), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-21 00:47:25,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 00:47:25,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:47:25,178 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:47:25,179 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:47:25,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:47:25,184 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2021-11-21 00:47:25,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:47:25,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [505268738] [2021-11-21 00:47:25,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:25,198 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:47:25,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:47:25,202 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:47:25,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 00:47:25,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:47:25,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-21 00:47:25,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:47:25,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:25,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:47:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:47:26,032 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:47:26,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [505268738] [2021-11-21 00:47:26,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [505268738] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:47:26,034 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:47:26,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 00:47:26,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051174755] [2021-11-21 00:47:26,037 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:47:26,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 00:47:26,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:47:26,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 00:47:26,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:47:26,088 INFO L87 Difference]: Start difference. First operand has 81 states, 68 states have (on average 1.588235294117647) internal successors, (108), 72 states have internal predecessors, (108), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-11-21 00:47:26,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:47:26,143 INFO L93 Difference]: Finished difference Result 157 states and 248 transitions. [2021-11-21 00:47:26,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 00:47:26,145 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2021-11-21 00:47:26,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:47:26,155 INFO L225 Difference]: With dead ends: 157 [2021-11-21 00:47:26,155 INFO L226 Difference]: Without dead ends: 74 [2021-11-21 00:47:26,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:47:26,165 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:47:26,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:47:26,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-21 00:47:26,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-21 00:47:26,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 62 states have (on average 1.4838709677419355) internal successors, (92), 65 states have internal predecessors, (92), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-21 00:47:26,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 107 transitions. [2021-11-21 00:47:26,213 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 107 transitions. Word has length 7 [2021-11-21 00:47:26,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:47:26,213 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 107 transitions. [2021-11-21 00:47:26,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-11-21 00:47:26,214 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 107 transitions. [2021-11-21 00:47:26,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 00:47:26,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:47:26,215 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:47:26,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:47:26,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:47:26,422 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:47:26,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:47:26,423 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2021-11-21 00:47:26,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:47:26,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1464320693] [2021-11-21 00:47:26,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:47:26,425 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:47:26,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:47:26,426 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:47:26,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 00:57:36,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:57:36,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:57:36,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:57:51,711 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0) (= |c_ULTIMATE.start_main1_~result~0#1| (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-11-21 00:58:41,316 WARN L838 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (let ((.cse0 (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))) (or (not (fp.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 2797.0 2000.0)))) (not (fp.geq .cse0 (_ +zero 8 24))))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1)))) is different from false [2021-11-21 00:58:43,359 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (let ((.cse0 (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))) (or (not (fp.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 2797.0 2000.0)))) (not (fp.geq .cse0 (_ +zero 8 24))))) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1)))) is different from true [2021-11-21 00:58:43,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:58:43,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:58:54,023 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.lt .cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 2797.0 2000.0))) (fp.geq .cse0 (_ +zero 8 24)))) is different from false [2021-11-21 00:58:56,091 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.lt .cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 2797.0 2000.0))) (fp.geq .cse0 (_ +zero 8 24)))) is different from true [2021-11-21 00:59:10,837 WARN L838 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32)) (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.lt .cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 2797.0 2000.0))) (fp.geq .cse0 (_ +zero 8 24))))) is different from false [2021-11-21 00:59:12,910 WARN L860 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32)) (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode 1.0) (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.lt .cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 2797.0 2000.0))) (fp.geq .cse0 (_ +zero 8 24))))) is different from true [2021-11-21 00:59:57,200 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~IN~0#1_4| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (or (not (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_4| .cse0)) (not (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_4| (_ +zero 8 24))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)))) (and (fp.lt .cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 2797.0 2000.0))) (fp.geq .cse1 (_ +zero 8 24))))))) is different from false [2021-11-21 00:59:59,272 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~IN~0#1_4| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (or (not (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_4| .cse0)) (not (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_4| (_ +zero 8 24))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)))) (and (fp.lt .cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 2797.0 2000.0))) (fp.geq .cse1 (_ +zero 8 24))))))) is different from true [2021-11-21 01:00:41,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:00:41,493 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:00:41,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1464320693] [2021-11-21 01:00:41,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1464320693] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:00:41,494 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:00:41,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 10 [2021-11-21 01:00:41,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895563789] [2021-11-21 01:00:41,494 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:00:41,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 01:00:41,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:00:41,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 01:00:41,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=20, Unknown=9, NotChecked=60, Total=110 [2021-11-21 01:00:41,497 INFO L87 Difference]: Start difference. First operand 74 states and 107 transitions. Second operand has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 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) [2021-11-21 01:00:43,571 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main1_~IN~0#1_4| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (or (not (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_4| .cse0)) (not (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_4| (_ +zero 8 24))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)))) (and (fp.lt .cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 2797.0 2000.0))) (fp.geq .cse1 (_ +zero 8 24))))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-11-21 01:00:45,643 WARN L860 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main1_~IN~0#1_4| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (or (not (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_4| .cse0)) (not (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_4| (_ +zero 8 24))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|) |v_ULTIMATE.start_main1_~IN~0#1_4|)))) (and (fp.lt .cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 2797.0 2000.0))) (fp.geq .cse1 (_ +zero 8 24))))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-21 01:00:47,711 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32))) (.cse2 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (or .cse0 (let ((.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse2 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.lt .cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 2797.0 2000.0))) (fp.geq .cse1 (_ +zero 8 24))))) (= c_currentRoundingMode roundNearestTiesToEven) (let ((.cse3 (fp.geq |c_ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24))) (.cse4 (fp.lt |c_ULTIMATE.start_main1_~IN~0#1| .cse2))) (or (and .cse3 .cse4 (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv1 32))) (and .cse0 (or (not .cse3) (not .cse4))))))) is different from false [2021-11-21 01:00:49,794 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32))) (.cse2 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (or .cse0 (let ((.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse2 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.lt .cse1 ((_ to_fp 8 24) c_currentRoundingMode (/ 2797.0 2000.0))) (fp.geq .cse1 (_ +zero 8 24))))) (= c_currentRoundingMode roundNearestTiesToEven) (let ((.cse3 (fp.geq |c_ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24))) (.cse4 (fp.lt |c_ULTIMATE.start_main1_~IN~0#1| .cse2))) (or (and .cse3 .cse4 (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv1 32))) (and .cse0 (or (not .cse3) (not .cse4))))))) is different from true [2021-11-21 01:00:51,853 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse1 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.lt .cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 2797.0 2000.0))) (fp.geq .cse0 (_ +zero 8 24)) (fp.geq |c_ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |c_ULTIMATE.start_main1_~IN~0#1| .cse1) (= c_currentRoundingMode roundNearestTiesToEven)))) is different from false [2021-11-21 01:00:53,920 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse1 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|) |c_ULTIMATE.start_main1_~IN~0#1|)))) (and (fp.lt .cse0 ((_ to_fp 8 24) c_currentRoundingMode (/ 2797.0 2000.0))) (fp.geq .cse0 (_ +zero 8 24)) (fp.geq |c_ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |c_ULTIMATE.start_main1_~IN~0#1| .cse1) (= c_currentRoundingMode roundNearestTiesToEven)))) is different from true [2021-11-21 01:00:55,997 WARN L838 $PredicateComparison]: unable to prove that (and (fp.geq |c_ULTIMATE.start_main1_~result~0#1| (_ +zero 8 24)) (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0) (= |c_ULTIMATE.start_main1_~result~0#1| (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))))) (= c_currentRoundingMode roundNearestTiesToEven) (fp.lt |c_ULTIMATE.start_main1_~result~0#1| ((_ to_fp 8 24) c_currentRoundingMode (/ 2797.0 2000.0)))) is different from false [2021-11-21 01:00:56,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:56,032 INFO L93 Difference]: Finished difference Result 74 states and 107 transitions. [2021-11-21 01:00:56,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:00:56,033 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 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 7 [2021-11-21 01:00:56,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:56,035 INFO L225 Difference]: With dead ends: 74 [2021-11-21 01:00:56,035 INFO L226 Difference]: Without dead ends: 69 [2021-11-21 01:00:56,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 33.3s TimeCoverageRelationStatistics Valid=29, Invalid=21, Unknown=16, NotChecked=144, Total=210 [2021-11-21 01:00:56,037 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 0 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 405 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:56,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 397 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 405 Unchecked, 0.0s Time] [2021-11-21 01:00:56,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-21 01:00:56,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-21 01:00:56,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 58 states have (on average 1.5) internal successors, (87), 60 states have internal predecessors, (87), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-21 01:00:56,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 102 transitions. [2021-11-21 01:00:56,049 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 102 transitions. Word has length 7 [2021-11-21 01:00:56,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:56,049 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 102 transitions. [2021-11-21 01:00:56,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 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) [2021-11-21 01:00:56,050 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 102 transitions. [2021-11-21 01:00:56,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-21 01:00:56,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:56,052 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:56,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:00:56,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:00:56,252 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:56,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:56,253 INFO L85 PathProgramCache]: Analyzing trace with hash -567365317, now seen corresponding path program 1 times [2021-11-21 01:00:56,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:00:56,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791082560] [2021-11-21 01:00:56,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:56,255 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:00:56,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:00:56,256 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:00:56,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-21 01:00:56,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:56,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:00:56,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:56,665 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:00:56,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:00:56,969 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:00:56,970 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:00:56,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791082560] [2021-11-21 01:00:56,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791082560] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:00:56,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1653827637] [2021-11-21 01:00:56,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:56,971 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:00:56,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:00:56,974 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:00:56,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-21 01:00:57,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:57,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:00:57,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:57,509 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:00:57,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:00:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:00:57,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1653827637] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:00:57,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66005367] [2021-11-21 01:00:57,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:57,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:00:57,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:00:57,829 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:00:57,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:00:57,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:57,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:00:57,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:58,061 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:00:58,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:00:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:00:58,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66005367] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:00:58,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:00:58,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 8, 8, 8] total 10 [2021-11-21 01:00:58,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775977889] [2021-11-21 01:00:58,345 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:00:58,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 01:00:58,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:00:58,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 01:00:58,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:00:58,347 INFO L87 Difference]: Start difference. First operand 69 states and 102 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 01:01:00,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:00,650 INFO L93 Difference]: Finished difference Result 325 states and 520 transitions. [2021-11-21 01:01:00,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-21 01:01:00,651 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 33 [2021-11-21 01:01:00,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:00,657 INFO L225 Difference]: With dead ends: 325 [2021-11-21 01:01:00,657 INFO L226 Difference]: Without dead ends: 280 [2021-11-21 01:01:00,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:01:00,660 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 292 mSDsluCounter, 1221 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 1405 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:00,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 1405 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-21 01:01:00,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-21 01:01:00,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 113. [2021-11-21 01:01:00,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 95 states have (on average 1.4210526315789473) internal successors, (135), 96 states have internal predecessors, (135), 14 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (20), 16 states have call predecessors, (20), 13 states have call successors, (20) [2021-11-21 01:01:00,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 169 transitions. [2021-11-21 01:01:00,693 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 169 transitions. Word has length 33 [2021-11-21 01:01:00,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:00,694 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 169 transitions. [2021-11-21 01:01:00,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 01:01:00,694 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 169 transitions. [2021-11-21 01:01:00,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-21 01:01:00,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:00,697 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:01:00,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:00,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:01,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:01,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:01:01,319 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:01,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:01,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1860757616, now seen corresponding path program 1 times [2021-11-21 01:01:01,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:01:01,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1342334312] [2021-11-21 01:01:01,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:01,320 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:01:01,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:01:01,326 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:01:01,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-21 01:01:01,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:01,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:01:01,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:01,685 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:01:01,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:01:01,972 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:01:01,973 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:01:01,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1342334312] [2021-11-21 01:01:01,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1342334312] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:01,973 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:01:01,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-21 01:01:01,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800962412] [2021-11-21 01:01:01,974 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:01,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:01:01,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:01:01,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:01:01,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:01:01,976 INFO L87 Difference]: Start difference. First operand 113 states and 169 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:01:02,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:02,330 INFO L93 Difference]: Finished difference Result 249 states and 374 transitions. [2021-11-21 01:01:02,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:01:02,331 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2021-11-21 01:01:02,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:02,333 INFO L225 Difference]: With dead ends: 249 [2021-11-21 01:01:02,333 INFO L226 Difference]: Without dead ends: 188 [2021-11-21 01:01:02,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:01:02,336 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 53 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:02,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 456 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:01:02,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-21 01:01:02,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2021-11-21 01:01:02,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 160 states have (on average 1.4125) internal successors, (226), 159 states have internal predecessors, (226), 20 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (26), 26 states have call predecessors, (26), 19 states have call successors, (26) [2021-11-21 01:01:02,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 272 transitions. [2021-11-21 01:01:02,361 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 272 transitions. Word has length 41 [2021-11-21 01:01:02,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:02,362 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 272 transitions. [2021-11-21 01:01:02,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:01:02,362 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 272 transitions. [2021-11-21 01:01:02,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-21 01:01:02,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:02,365 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:01:02,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:02,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:01:02,578 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:02,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:02,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1180699246, now seen corresponding path program 1 times [2021-11-21 01:01:02,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:01:02,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244055817] [2021-11-21 01:01:02,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:02,580 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:01:02,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:01:02,580 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:01:02,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-21 01:01:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:02,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:01:02,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:01:02,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:01:03,312 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:01:03,312 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:01:03,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244055817] [2021-11-21 01:01:03,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244055817] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:03,313 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:01:03,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-21 01:01:03,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530099667] [2021-11-21 01:01:03,313 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:03,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:01:03,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:01:03,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:01:03,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:01:03,315 INFO L87 Difference]: Start difference. First operand 184 states and 272 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:01:03,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:03,817 INFO L93 Difference]: Finished difference Result 257 states and 382 transitions. [2021-11-21 01:01:03,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:01:03,818 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2021-11-21 01:01:03,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:03,820 INFO L225 Difference]: With dead ends: 257 [2021-11-21 01:01:03,820 INFO L226 Difference]: Without dead ends: 202 [2021-11-21 01:01:03,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:01:03,822 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 105 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:03,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 542 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:01:03,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-21 01:01:03,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 175. [2021-11-21 01:01:03,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 153 states have (on average 1.392156862745098) internal successors, (213), 152 states have internal predecessors, (213), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (24), 24 states have call predecessors, (24), 17 states have call successors, (24) [2021-11-21 01:01:03,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 255 transitions. [2021-11-21 01:01:03,842 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 255 transitions. Word has length 41 [2021-11-21 01:01:03,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:03,843 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 255 transitions. [2021-11-21 01:01:03,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:01:03,843 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 255 transitions. [2021-11-21 01:01:03,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-21 01:01:03,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:03,846 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:01:03,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:04,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:01:04,059 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:04,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:04,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1938435092, now seen corresponding path program 1 times [2021-11-21 01:01:04,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:01:04,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1197111910] [2021-11-21 01:01:04,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:04,061 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:01:04,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:01:04,062 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:01:04,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-21 01:01:04,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:04,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:01:04,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:04,366 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:01:04,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:01:04,631 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:01:04,631 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:01:04,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1197111910] [2021-11-21 01:01:04,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1197111910] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:04,632 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:01:04,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 01:01:04,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862698299] [2021-11-21 01:01:04,632 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:04,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:01:04,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:01:04,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:01:04,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:01:04,633 INFO L87 Difference]: Start difference. First operand 175 states and 255 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:01:04,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:04,821 INFO L93 Difference]: Finished difference Result 349 states and 515 transitions. [2021-11-21 01:01:04,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:01:04,822 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-11-21 01:01:04,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:04,824 INFO L225 Difference]: With dead ends: 349 [2021-11-21 01:01:04,824 INFO L226 Difference]: Without dead ends: 283 [2021-11-21 01:01:04,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:01:04,826 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 99 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:04,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 522 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:01:04,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-21 01:01:04,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 233. [2021-11-21 01:01:04,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 211 states have (on average 1.3270142180094786) internal successors, (280), 208 states have internal predecessors, (280), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (24), 24 states have call predecessors, (24), 17 states have call successors, (24) [2021-11-21 01:01:04,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 322 transitions. [2021-11-21 01:01:04,849 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 322 transitions. Word has length 44 [2021-11-21 01:01:04,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:04,850 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 322 transitions. [2021-11-21 01:01:04,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:01:04,850 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 322 transitions. [2021-11-21 01:01:04,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-21 01:01:04,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:04,853 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:01:04,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:05,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:01:05,054 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:05,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:05,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1643290396, now seen corresponding path program 1 times [2021-11-21 01:01:05,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:01:05,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1463606217] [2021-11-21 01:01:05,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:05,055 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:01:05,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:01:05,056 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:01:05,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-21 01:01:05,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:05,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:01:05,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:05,869 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:01:05,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:01:06,444 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:01:06,444 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:01:06,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1463606217] [2021-11-21 01:01:06,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1463606217] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:01:06,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:01:06,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2021-11-21 01:01:06,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368183810] [2021-11-21 01:01:06,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:06,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:01:06,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:01:06,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:01:06,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:01:06,446 INFO L87 Difference]: Start difference. First operand 233 states and 322 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:01:07,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:07,893 INFO L93 Difference]: Finished difference Result 405 states and 582 transitions. [2021-11-21 01:01:07,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:01:07,894 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-11-21 01:01:07,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:07,901 INFO L225 Difference]: With dead ends: 405 [2021-11-21 01:01:07,901 INFO L226 Difference]: Without dead ends: 369 [2021-11-21 01:01:07,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-11-21 01:01:07,903 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 194 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:07,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 545 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-21 01:01:07,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-11-21 01:01:07,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 286. [2021-11-21 01:01:07,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 259 states have (on average 1.3127413127413128) internal successors, (340), 257 states have internal predecessors, (340), 23 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (29), 29 states have call predecessors, (29), 22 states have call successors, (29) [2021-11-21 01:01:07,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 392 transitions. [2021-11-21 01:01:07,942 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 392 transitions. Word has length 45 [2021-11-21 01:01:07,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:07,944 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 392 transitions. [2021-11-21 01:01:07,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:01:07,945 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 392 transitions. [2021-11-21 01:01:07,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-21 01:01:07,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:07,954 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:01:07,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:08,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:01:08,164 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:08,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:08,164 INFO L85 PathProgramCache]: Analyzing trace with hash -876669538, now seen corresponding path program 1 times [2021-11-21 01:01:08,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:01:08,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1753483666] [2021-11-21 01:01:08,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:08,165 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:01:08,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:01:08,166 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:01:08,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-21 01:01:08,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:08,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:01:08,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:08,381 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:01:08,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:01:08,578 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:01:08,578 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:01:08,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1753483666] [2021-11-21 01:01:08,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1753483666] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:08,578 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:01:08,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-21 01:01:08,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799920496] [2021-11-21 01:01:08,579 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:08,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:01:08,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:01:08,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:01:08,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:01:08,580 INFO L87 Difference]: Start difference. First operand 286 states and 392 transitions. Second operand has 8 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:01:08,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:08,725 INFO L93 Difference]: Finished difference Result 293 states and 398 transitions. [2021-11-21 01:01:08,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:01:08,726 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-11-21 01:01:08,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:08,729 INFO L225 Difference]: With dead ends: 293 [2021-11-21 01:01:08,729 INFO L226 Difference]: Without dead ends: 286 [2021-11-21 01:01:08,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:01:08,730 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 11 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:08,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 487 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:01:08,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-21 01:01:08,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2021-11-21 01:01:08,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 259 states have (on average 1.3011583011583012) internal successors, (337), 257 states have internal predecessors, (337), 23 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (29), 29 states have call predecessors, (29), 22 states have call successors, (29) [2021-11-21 01:01:08,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 389 transitions. [2021-11-21 01:01:08,749 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 389 transitions. Word has length 45 [2021-11-21 01:01:08,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:08,749 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 389 transitions. [2021-11-21 01:01:08,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:01:08,750 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 389 transitions. [2021-11-21 01:01:08,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-21 01:01:08,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:08,751 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:01:08,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:08,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:01:08,968 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:08,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:08,969 INFO L85 PathProgramCache]: Analyzing trace with hash 457064955, now seen corresponding path program 2 times [2021-11-21 01:01:08,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:01:08,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2035471771] [2021-11-21 01:01:08,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:01:08,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:01:08,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:01:08,970 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:01:08,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-21 01:01:09,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-21 01:01:09,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:01:09,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:01:09,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:09,445 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 01:01:09,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:01:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 01:01:09,779 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:01:09,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2035471771] [2021-11-21 01:01:09,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2035471771] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:09,780 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:01:09,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-21 01:01:09,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960936996] [2021-11-21 01:01:09,780 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:09,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 01:01:09,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:01:09,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 01:01:09,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:01:09,781 INFO L87 Difference]: Start difference. First operand 286 states and 389 transitions. Second operand has 10 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:01:10,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:10,559 INFO L93 Difference]: Finished difference Result 443 states and 617 transitions. [2021-11-21 01:01:10,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:01:10,560 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-11-21 01:01:10,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:10,564 INFO L225 Difference]: With dead ends: 443 [2021-11-21 01:01:10,564 INFO L226 Difference]: Without dead ends: 441 [2021-11-21 01:01:10,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:01:10,565 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 126 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:10,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 1087 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 88 Invalid, 0 Unknown, 10 Unchecked, 0.5s Time] [2021-11-21 01:01:10,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-11-21 01:01:10,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 290. [2021-11-21 01:01:10,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 262 states have (on average 1.297709923664122) internal successors, (340), 260 states have internal predecessors, (340), 23 states have call successors, (23), 3 states have call predecessors, (23), 4 states have return successors, (29), 29 states have call predecessors, (29), 22 states have call successors, (29) [2021-11-21 01:01:10,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 392 transitions. [2021-11-21 01:01:10,593 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 392 transitions. Word has length 45 [2021-11-21 01:01:10,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:10,594 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 392 transitions. [2021-11-21 01:01:10,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:01:10,594 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 392 transitions. [2021-11-21 01:01:10,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-21 01:01:10,597 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:10,597 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:01:10,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:10,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:01:10,815 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:10,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:10,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1895517033, now seen corresponding path program 1 times [2021-11-21 01:01:10,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:01:10,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [586184259] [2021-11-21 01:01:10,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:10,816 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:01:10,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:01:10,817 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:01:10,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-21 01:01:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:10,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:01:10,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:11,037 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:01:11,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:01:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:01:11,250 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:01:11,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [586184259] [2021-11-21 01:01:11,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [586184259] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:11,250 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:01:11,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 01:01:11,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689441527] [2021-11-21 01:01:11,250 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:11,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:01:11,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:01:11,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:01:11,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:01:11,252 INFO L87 Difference]: Start difference. First operand 290 states and 392 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:01:11,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:11,414 INFO L93 Difference]: Finished difference Result 620 states and 841 transitions. [2021-11-21 01:01:11,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:01:11,415 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2021-11-21 01:01:11,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:11,419 INFO L225 Difference]: With dead ends: 620 [2021-11-21 01:01:11,419 INFO L226 Difference]: Without dead ends: 568 [2021-11-21 01:01:11,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:01:11,421 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 93 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:11,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 505 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:01:11,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-21 01:01:11,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 309. [2021-11-21 01:01:11,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 280 states have (on average 1.3) internal successors, (364), 277 states have internal predecessors, (364), 24 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (30), 30 states have call predecessors, (30), 23 states have call successors, (30) [2021-11-21 01:01:11,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 418 transitions. [2021-11-21 01:01:11,447 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 418 transitions. Word has length 46 [2021-11-21 01:01:11,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:11,448 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 418 transitions. [2021-11-21 01:01:11,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:01:11,448 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 418 transitions. [2021-11-21 01:01:11,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-21 01:01:11,450 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:11,450 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:01:11,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:11,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:01:11,666 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:11,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:11,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1657751029, now seen corresponding path program 1 times [2021-11-21 01:01:11,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:01:11,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103271063] [2021-11-21 01:01:11,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:11,667 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:01:11,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:01:11,668 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:01:11,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-21 01:01:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:11,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:01:11,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:11,889 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:01:11,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:01:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:01:12,012 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:01:12,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2103271063] [2021-11-21 01:01:12,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2103271063] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:12,012 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:01:12,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-21 01:01:12,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20714736] [2021-11-21 01:01:12,013 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:12,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:01:12,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:01:12,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:01:12,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:01:12,014 INFO L87 Difference]: Start difference. First operand 309 states and 418 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:01:12,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:12,098 INFO L93 Difference]: Finished difference Result 324 states and 434 transitions. [2021-11-21 01:01:12,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:01:12,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2021-11-21 01:01:12,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:12,101 INFO L225 Difference]: With dead ends: 324 [2021-11-21 01:01:12,101 INFO L226 Difference]: Without dead ends: 266 [2021-11-21 01:01:12,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:01:12,102 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 1 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:12,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 291 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:01:12,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-21 01:01:12,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2021-11-21 01:01:12,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 237 states have (on average 1.3122362869198312) internal successors, (311), 236 states have internal predecessors, (311), 24 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (28), 28 states have call predecessors, (28), 23 states have call successors, (28) [2021-11-21 01:01:12,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 363 transitions. [2021-11-21 01:01:12,121 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 363 transitions. Word has length 49 [2021-11-21 01:01:12,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:12,121 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 363 transitions. [2021-11-21 01:01:12,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:01:12,122 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 363 transitions. [2021-11-21 01:01:12,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-21 01:01:12,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:12,123 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:01:12,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:12,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:01:12,335 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:12,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:12,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1176937396, now seen corresponding path program 1 times [2021-11-21 01:01:12,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:01:12,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164820196] [2021-11-21 01:01:12,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:12,336 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:01:12,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:01:12,337 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:01:12,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-21 01:01:12,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:12,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:01:12,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:12,642 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 01:01:12,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:01:12,798 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 01:01:12,798 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:01:12,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164820196] [2021-11-21 01:01:12,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164820196] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:12,799 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:01:12,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-21 01:01:12,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174490087] [2021-11-21 01:01:12,799 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:12,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:01:12,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:01:12,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:01:12,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:01:12,800 INFO L87 Difference]: Start difference. First operand 266 states and 363 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:01:13,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:13,239 INFO L93 Difference]: Finished difference Result 418 states and 568 transitions. [2021-11-21 01:01:13,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:01:13,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2021-11-21 01:01:13,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:13,242 INFO L225 Difference]: With dead ends: 418 [2021-11-21 01:01:13,242 INFO L226 Difference]: Without dead ends: 376 [2021-11-21 01:01:13,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:01:13,244 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 149 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:13,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 527 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:01:13,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-11-21 01:01:13,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 266. [2021-11-21 01:01:13,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 237 states have (on average 1.3037974683544304) internal successors, (309), 236 states have internal predecessors, (309), 24 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (28), 28 states have call predecessors, (28), 23 states have call successors, (28) [2021-11-21 01:01:13,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 361 transitions. [2021-11-21 01:01:13,270 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 361 transitions. Word has length 50 [2021-11-21 01:01:13,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:13,271 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 361 transitions. [2021-11-21 01:01:13,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:01:13,271 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 361 transitions. [2021-11-21 01:01:13,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-21 01:01:13,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:13,273 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:01:13,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:13,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:01:13,485 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:13,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:13,486 INFO L85 PathProgramCache]: Analyzing trace with hash -475872818, now seen corresponding path program 1 times [2021-11-21 01:01:13,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:01:13,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1410024548] [2021-11-21 01:01:13,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:13,486 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:01:13,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:01:13,487 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:01:13,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-21 01:01:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:13,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:01:13,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:13,701 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 01:01:13,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:01:13,857 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 01:01:13,857 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:01:13,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1410024548] [2021-11-21 01:01:13,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1410024548] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:13,858 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:01:13,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-21 01:01:13,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80192368] [2021-11-21 01:01:13,858 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:13,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:01:13,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:01:13,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:01:13,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:01:13,859 INFO L87 Difference]: Start difference. First operand 266 states and 361 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:01:14,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:14,113 INFO L93 Difference]: Finished difference Result 434 states and 574 transitions. [2021-11-21 01:01:14,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:01:14,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2021-11-21 01:01:14,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:14,116 INFO L225 Difference]: With dead ends: 434 [2021-11-21 01:01:14,116 INFO L226 Difference]: Without dead ends: 400 [2021-11-21 01:01:14,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:01:14,118 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 86 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:14,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 332 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:01:14,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-11-21 01:01:14,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 274. [2021-11-21 01:01:14,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 245 states have (on average 1.2979591836734694) internal successors, (318), 244 states have internal predecessors, (318), 24 states have call successors, (24), 3 states have call predecessors, (24), 4 states have return successors, (28), 28 states have call predecessors, (28), 23 states have call successors, (28) [2021-11-21 01:01:14,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 370 transitions. [2021-11-21 01:01:14,152 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 370 transitions. Word has length 50 [2021-11-21 01:01:14,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:14,152 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 370 transitions. [2021-11-21 01:01:14,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:01:14,152 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 370 transitions. [2021-11-21 01:01:14,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-21 01:01:14,154 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:14,154 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:01:14,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:14,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:01:14,370 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:14,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:14,371 INFO L85 PathProgramCache]: Analyzing trace with hash 33068664, now seen corresponding path program 1 times [2021-11-21 01:01:14,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:01:14,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741907606] [2021-11-21 01:01:14,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:14,371 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:01:14,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:01:14,372 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:01:14,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-21 01:01:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:14,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:01:14,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:01:14,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:01:15,292 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:01:15,292 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:01:15,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741907606] [2021-11-21 01:01:15,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741907606] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:15,293 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:01:15,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-21 01:01:15,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013850048] [2021-11-21 01:01:15,293 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:15,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 01:01:15,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:01:15,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 01:01:15,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:01:15,294 INFO L87 Difference]: Start difference. First operand 274 states and 370 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:01:19,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:19,249 INFO L93 Difference]: Finished difference Result 592 states and 818 transitions. [2021-11-21 01:01:19,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 01:01:19,250 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2021-11-21 01:01:19,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:19,253 INFO L225 Difference]: With dead ends: 592 [2021-11-21 01:01:19,254 INFO L226 Difference]: Without dead ends: 568 [2021-11-21 01:01:19,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2021-11-21 01:01:19,255 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 616 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:19,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [620 Valid, 895 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-21 01:01:19,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-21 01:01:19,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 333. [2021-11-21 01:01:19,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 296 states have (on average 1.2939189189189189) internal successors, (383), 297 states have internal predecessors, (383), 32 states have call successors, (32), 3 states have call predecessors, (32), 4 states have return successors, (36), 36 states have call predecessors, (36), 31 states have call successors, (36) [2021-11-21 01:01:19,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 451 transitions. [2021-11-21 01:01:19,292 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 451 transitions. Word has length 51 [2021-11-21 01:01:19,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:19,292 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 451 transitions. [2021-11-21 01:01:19,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:01:19,293 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 451 transitions. [2021-11-21 01:01:19,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-21 01:01:19,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:19,294 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:01:19,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-21 01:01:19,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:01:19,507 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:19,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:19,507 INFO L85 PathProgramCache]: Analyzing trace with hash 2004133062, now seen corresponding path program 1 times [2021-11-21 01:01:19,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:01:19,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1774944258] [2021-11-21 01:01:19,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:19,508 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:01:19,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:01:19,508 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:01:19,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-21 01:01:19,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:19,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:01:19,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:19,747 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:01:19,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:01:19,989 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:01:19,990 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:01:19,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1774944258] [2021-11-21 01:01:19,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1774944258] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:19,990 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:01:19,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 01:01:19,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89162200] [2021-11-21 01:01:19,990 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:19,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:01:19,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:01:19,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:01:19,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:01:19,991 INFO L87 Difference]: Start difference. First operand 333 states and 451 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:01:20,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:20,123 INFO L93 Difference]: Finished difference Result 399 states and 534 transitions. [2021-11-21 01:01:20,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:01:20,123 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2021-11-21 01:01:20,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:20,126 INFO L225 Difference]: With dead ends: 399 [2021-11-21 01:01:20,126 INFO L226 Difference]: Without dead ends: 362 [2021-11-21 01:01:20,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:01:20,127 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 129 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:20,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 384 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:01:20,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-11-21 01:01:20,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 337. [2021-11-21 01:01:20,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 300 states have (on average 1.2566666666666666) internal successors, (377), 301 states have internal predecessors, (377), 32 states have call successors, (32), 3 states have call predecessors, (32), 4 states have return successors, (36), 36 states have call predecessors, (36), 31 states have call successors, (36) [2021-11-21 01:01:20,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 445 transitions. [2021-11-21 01:01:20,154 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 445 transitions. Word has length 51 [2021-11-21 01:01:20,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:20,154 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 445 transitions. [2021-11-21 01:01:20,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:01:20,155 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 445 transitions. [2021-11-21 01:01:20,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-21 01:01:20,156 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:20,156 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:01:20,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:20,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:01:20,368 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:20,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:20,369 INFO L85 PathProgramCache]: Analyzing trace with hash 2018317967, now seen corresponding path program 1 times [2021-11-21 01:01:20,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:01:20,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1862235971] [2021-11-21 01:01:20,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:20,370 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:01:20,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:01:20,371 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:01:20,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-21 01:01:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:20,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:01:20,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:20,699 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 01:01:20,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:01:21,015 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 01:01:21,016 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:01:21,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1862235971] [2021-11-21 01:01:21,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1862235971] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:01:21,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:01:21,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-21 01:01:21,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208125306] [2021-11-21 01:01:21,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:21,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:01:21,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:01:21,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:01:21,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:01:21,018 INFO L87 Difference]: Start difference. First operand 337 states and 445 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 01:01:21,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:21,237 INFO L93 Difference]: Finished difference Result 560 states and 737 transitions. [2021-11-21 01:01:21,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:01:21,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2021-11-21 01:01:21,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:21,240 INFO L225 Difference]: With dead ends: 560 [2021-11-21 01:01:21,240 INFO L226 Difference]: Without dead ends: 227 [2021-11-21 01:01:21,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:01:21,242 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 25 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:21,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 241 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:01:21,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-11-21 01:01:21,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 215. [2021-11-21 01:01:21,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 186 states have (on average 1.2204301075268817) internal successors, (227), 191 states have internal predecessors, (227), 23 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (26), 24 states have call predecessors, (26), 22 states have call successors, (26) [2021-11-21 01:01:21,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 276 transitions. [2021-11-21 01:01:21,267 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 276 transitions. Word has length 51 [2021-11-21 01:01:21,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:21,267 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 276 transitions. [2021-11-21 01:01:21,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 01:01:21,268 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 276 transitions. [2021-11-21 01:01:21,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-21 01:01:21,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:21,269 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:01:21,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:21,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:01:21,482 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:21,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:21,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1153296820, now seen corresponding path program 1 times [2021-11-21 01:01:21,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:01:21,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1639485899] [2021-11-21 01:01:21,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:21,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:01:21,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:01:21,485 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:01:21,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-21 01:01:21,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:21,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:01:21,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:01:21,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:01:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:01:21,829 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:01:21,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1639485899] [2021-11-21 01:01:21,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1639485899] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:21,830 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:01:21,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-21 01:01:21,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520564533] [2021-11-21 01:01:21,830 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:21,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:01:21,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:01:21,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:01:21,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:01:21,831 INFO L87 Difference]: Start difference. First operand 215 states and 276 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:01:21,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:21,913 INFO L93 Difference]: Finished difference Result 224 states and 284 transitions. [2021-11-21 01:01:21,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:01:21,913 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2021-11-21 01:01:21,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:21,915 INFO L225 Difference]: With dead ends: 224 [2021-11-21 01:01:21,916 INFO L226 Difference]: Without dead ends: 183 [2021-11-21 01:01:21,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:01:21,917 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 1 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:21,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 282 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:01:21,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-21 01:01:21,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 177. [2021-11-21 01:01:21,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 151 states have (on average 1.2317880794701987) internal successors, (186), 157 states have internal predecessors, (186), 20 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (20), 19 states have call predecessors, (20), 18 states have call successors, (20) [2021-11-21 01:01:21,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 226 transitions. [2021-11-21 01:01:21,931 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 226 transitions. Word has length 53 [2021-11-21 01:01:21,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:21,932 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 226 transitions. [2021-11-21 01:01:21,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:01:21,932 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 226 transitions. [2021-11-21 01:01:21,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-21 01:01:21,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:21,933 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:01:21,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:22,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:01:22,150 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:22,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:22,151 INFO L85 PathProgramCache]: Analyzing trace with hash -826993692, now seen corresponding path program 1 times [2021-11-21 01:01:22,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:01:22,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1228949190] [2021-11-21 01:01:22,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:22,151 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:01:22,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:01:22,152 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:01:22,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-21 01:01:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:22,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:01:22,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:22,461 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:01:22,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:01:22,819 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:01:22,820 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:01:22,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1228949190] [2021-11-21 01:01:22,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1228949190] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:22,820 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:01:22,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-21 01:01:22,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158670447] [2021-11-21 01:01:22,821 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:22,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 01:01:22,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:01:22,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 01:01:22,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:01:22,822 INFO L87 Difference]: Start difference. First operand 177 states and 226 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:01:25,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:25,479 INFO L93 Difference]: Finished difference Result 395 states and 503 transitions. [2021-11-21 01:01:25,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-21 01:01:25,479 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2021-11-21 01:01:25,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:25,481 INFO L225 Difference]: With dead ends: 395 [2021-11-21 01:01:25,482 INFO L226 Difference]: Without dead ends: 330 [2021-11-21 01:01:25,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2021-11-21 01:01:25,483 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 318 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:25,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 671 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-21 01:01:25,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-11-21 01:01:25,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 160. [2021-11-21 01:01:25,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 135 states have (on average 1.2148148148148148) internal successors, (164), 139 states have internal predecessors, (164), 20 states have call successors, (20), 3 states have call predecessors, (20), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-21 01:01:25,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 202 transitions. [2021-11-21 01:01:25,501 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 202 transitions. Word has length 53 [2021-11-21 01:01:25,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:25,501 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 202 transitions. [2021-11-21 01:01:25,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 01:01:25,502 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 202 transitions. [2021-11-21 01:01:25,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-21 01:01:25,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:25,503 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:01:25,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-21 01:01:25,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:01:25,716 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:25,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:25,716 INFO L85 PathProgramCache]: Analyzing trace with hash 841846950, now seen corresponding path program 1 times [2021-11-21 01:01:25,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:01:25,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [61693598] [2021-11-21 01:01:25,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:25,716 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:01:25,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:01:25,718 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:01:25,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-21 01:01:25,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:25,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:01:25,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:28,962 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 01:01:28,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:01:29,853 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 01:01:29,853 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:01:29,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [61693598] [2021-11-21 01:01:29,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [61693598] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:29,854 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:01:29,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2021-11-21 01:01:29,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329676293] [2021-11-21 01:01:29,854 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:29,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 01:01:29,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:01:29,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 01:01:29,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=135, Unknown=1, NotChecked=0, Total=182 [2021-11-21 01:01:29,856 INFO L87 Difference]: Start difference. First operand 160 states and 202 transitions. Second operand has 14 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-21 01:01:30,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:30,088 INFO L93 Difference]: Finished difference Result 185 states and 231 transitions. [2021-11-21 01:01:30,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 01:01:30,089 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 55 [2021-11-21 01:01:30,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:30,090 INFO L225 Difference]: With dead ends: 185 [2021-11-21 01:01:30,090 INFO L226 Difference]: Without dead ends: 183 [2021-11-21 01:01:30,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=52, Invalid=157, Unknown=1, NotChecked=0, Total=210 [2021-11-21 01:01:30,092 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 39 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:30,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 932 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2021-11-21 01:01:30,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-21 01:01:30,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 166. [2021-11-21 01:01:30,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 138 states have (on average 1.210144927536232) internal successors, (167), 144 states have internal predecessors, (167), 22 states have call successors, (22), 4 states have call predecessors, (22), 5 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-21 01:01:30,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 209 transitions. [2021-11-21 01:01:30,112 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 209 transitions. Word has length 55 [2021-11-21 01:01:30,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:30,112 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 209 transitions. [2021-11-21 01:01:30,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-21 01:01:30,113 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 209 transitions. [2021-11-21 01:01:30,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-21 01:01:30,113 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:30,114 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:01:30,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:30,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:01:30,326 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:30,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:30,326 INFO L85 PathProgramCache]: Analyzing trace with hash 12170841, now seen corresponding path program 1 times [2021-11-21 01:01:30,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:01:30,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [724839082] [2021-11-21 01:01:30,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:30,327 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:01:30,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:01:30,328 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:01:30,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-21 01:01:30,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:30,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:01:30,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:39,124 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 01:01:39,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:01:39,734 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 01:01:39,734 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:01:39,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [724839082] [2021-11-21 01:01:39,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [724839082] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:39,734 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:01:39,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2021-11-21 01:01:39,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823490725] [2021-11-21 01:01:39,735 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:39,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 01:01:39,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:01:39,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 01:01:39,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=135, Unknown=4, NotChecked=0, Total=182 [2021-11-21 01:01:39,736 INFO L87 Difference]: Start difference. First operand 166 states and 209 transitions. Second operand has 14 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-21 01:01:39,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:39,866 INFO L93 Difference]: Finished difference Result 192 states and 238 transitions. [2021-11-21 01:01:39,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:01:39,866 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 56 [2021-11-21 01:01:39,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:39,868 INFO L225 Difference]: With dead ends: 192 [2021-11-21 01:01:39,868 INFO L226 Difference]: Without dead ends: 190 [2021-11-21 01:01:39,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=49, Invalid=157, Unknown=4, NotChecked=0, Total=210 [2021-11-21 01:01:39,870 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 37 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:39,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 842 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 61 Unchecked, 0.1s Time] [2021-11-21 01:01:39,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-21 01:01:39,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 164. [2021-11-21 01:01:39,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 138 states have (on average 1.210144927536232) internal successors, (167), 142 states have internal predecessors, (167), 20 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-21 01:01:39,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 205 transitions. [2021-11-21 01:01:39,888 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 205 transitions. Word has length 56 [2021-11-21 01:01:39,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:39,888 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 205 transitions. [2021-11-21 01:01:39,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-21 01:01:39,888 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 205 transitions. [2021-11-21 01:01:39,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-21 01:01:39,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:39,890 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:01:39,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:40,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:01:40,103 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:40,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:40,103 INFO L85 PathProgramCache]: Analyzing trace with hash -407457257, now seen corresponding path program 1 times [2021-11-21 01:01:40,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:01:40,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [673793167] [2021-11-21 01:01:40,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:40,104 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:01:40,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:01:40,105 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:01:40,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-21 01:01:40,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:40,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:01:40,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:40,430 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 01:01:40,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:01:40,725 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 01:01:40,725 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:01:40,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [673793167] [2021-11-21 01:01:40,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [673793167] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:40,726 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:01:40,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-21 01:01:40,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780922252] [2021-11-21 01:01:40,726 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:40,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 01:01:40,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:01:40,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 01:01:40,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:01:40,727 INFO L87 Difference]: Start difference. First operand 164 states and 205 transitions. Second operand has 10 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-21 01:01:41,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:41,030 INFO L93 Difference]: Finished difference Result 193 states and 235 transitions. [2021-11-21 01:01:41,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:01:41,031 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 61 [2021-11-21 01:01:41,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:41,032 INFO L225 Difference]: With dead ends: 193 [2021-11-21 01:01:41,032 INFO L226 Difference]: Without dead ends: 191 [2021-11-21 01:01:41,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:01:41,034 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 64 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:41,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 597 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:01:41,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-21 01:01:41,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 168. [2021-11-21 01:01:41,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 141 states have (on average 1.2056737588652482) internal successors, (170), 145 states have internal predecessors, (170), 20 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-21 01:01:41,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 208 transitions. [2021-11-21 01:01:41,051 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 208 transitions. Word has length 61 [2021-11-21 01:01:41,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:41,052 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 208 transitions. [2021-11-21 01:01:41,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-21 01:01:41,052 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 208 transitions. [2021-11-21 01:01:41,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-21 01:01:41,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:41,054 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:01:41,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:41,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:01:41,266 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:41,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:41,267 INFO L85 PathProgramCache]: Analyzing trace with hash -943451417, now seen corresponding path program 1 times [2021-11-21 01:01:41,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:01:41,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [794504475] [2021-11-21 01:01:41,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:41,267 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:01:41,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:01:41,269 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:01:41,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_816452f3-893f-450c-b07d-569015042b44/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-21 01:01:41,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:41,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 01:01:41,341 INFO L286 TraceCheckSpWp]: Computing forward predicates...