./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1251.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_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/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_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1251.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/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_533da59b-3717-46a4-9431-57f0dc0c496a/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 de540e539c3db6027c1fdb04fcc6cae02aafb8aa58950d31054b2b0b8391af6d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:05:26,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:05:26,180 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:05:26,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:05:26,214 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:05:26,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:05:26,217 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:05:26,220 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:05:26,222 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:05:26,223 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:05:26,225 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:05:26,226 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:05:26,227 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:05:26,228 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:05:26,230 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:05:26,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:05:26,233 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:05:26,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:05:26,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:05:26,240 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:05:26,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:05:26,244 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:05:26,246 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:05:26,247 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:05:26,251 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:05:26,252 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:05:26,252 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:05:26,253 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:05:26,254 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:05:26,255 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:05:26,256 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:05:26,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:05:26,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:05:26,259 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:05:26,261 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:05:26,261 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:05:26,262 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:05:26,263 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:05:26,263 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:05:26,264 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:05:26,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:05:26,266 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:05:26,293 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:05:26,293 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:05:26,293 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:05:26,294 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:05:26,294 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:05:26,295 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:05:26,295 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:05:26,295 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:05:26,295 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:05:26,296 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:05:26,296 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:05:26,296 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:05:26,296 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:05:26,297 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:05:26,297 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:05:26,297 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:05:26,297 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:05:26,298 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:05:26,298 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:05:26,299 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:05:26,299 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:05:26,299 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:05:26,299 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:05:26,300 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:05:26,300 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:05:26,300 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:05:26,300 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:05:26,301 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:05:26,301 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:05:26,301 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:05:26,301 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:05:26,302 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:05:26,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:05:26,302 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:05:26,302 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:05:26,303 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:05:26,303 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:05:26,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:05:26,303 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:05:26,304 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:05:26,304 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:05:26,304 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_533da59b-3717-46a4-9431-57f0dc0c496a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de540e539c3db6027c1fdb04fcc6cae02aafb8aa58950d31054b2b0b8391af6d [2021-11-21 01:05:26,567 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:05:26,590 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:05:26,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:05:26,594 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:05:26,595 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:05:26,596 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/float-newlib/float_req_bl_1251.c [2021-11-21 01:05:26,690 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/data/342b0fe3d/15cbe33b610e4a3b97d430b293af730d/FLAG8e3d8bea9 [2021-11-21 01:05:27,151 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:05:27,152 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/sv-benchmarks/c/float-newlib/float_req_bl_1251.c [2021-11-21 01:05:27,160 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/data/342b0fe3d/15cbe33b610e4a3b97d430b293af730d/FLAG8e3d8bea9 [2021-11-21 01:05:27,519 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/data/342b0fe3d/15cbe33b610e4a3b97d430b293af730d [2021-11-21 01:05:27,522 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:05:27,523 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:05:27,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:05:27,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:05:27,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:05:27,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:05:27" (1/1) ... [2021-11-21 01:05:27,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ec88c00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:27, skipping insertion in model container [2021-11-21 01:05:27,531 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:05:27" (1/1) ... [2021-11-21 01:05:27,538 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:05:27,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:05:27,807 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_533da59b-3717-46a4-9431-57f0dc0c496a/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[1980,1993] [2021-11-21 01:05:27,811 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_533da59b-3717-46a4-9431-57f0dc0c496a/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[2139,2152] [2021-11-21 01:05:27,812 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:05:27,821 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:05:27,845 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_533da59b-3717-46a4-9431-57f0dc0c496a/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[1980,1993] [2021-11-21 01:05:27,846 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_533da59b-3717-46a4-9431-57f0dc0c496a/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[2139,2152] [2021-11-21 01:05:27,847 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:05:27,862 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:05:27,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:27 WrapperNode [2021-11-21 01:05:27,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:05:27,864 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:05:27,865 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:05:27,865 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:05:27,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:27" (1/1) ... [2021-11-21 01:05:27,884 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:27" (1/1) ... [2021-11-21 01:05:27,907 INFO L137 Inliner]: procedures = 18, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 107 [2021-11-21 01:05:27,908 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:05:27,909 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:05:27,909 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:05:27,909 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:05:27,918 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:27" (1/1) ... [2021-11-21 01:05:27,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:27" (1/1) ... [2021-11-21 01:05:27,921 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:27" (1/1) ... [2021-11-21 01:05:27,922 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:27" (1/1) ... [2021-11-21 01:05:27,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:27" (1/1) ... [2021-11-21 01:05:27,934 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:27" (1/1) ... [2021-11-21 01:05:27,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:27" (1/1) ... [2021-11-21 01:05:27,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:05:27,940 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:05:27,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:05:27,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:05:27,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:27" (1/1) ... [2021-11-21 01:05:27,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:05:27,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:05:27,991 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:05:28,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:05:28,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:05:28,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:05:28,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:05:28,050 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2021-11-21 01:05:28,050 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2021-11-21 01:05:28,050 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2021-11-21 01:05:28,050 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2021-11-21 01:05:28,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-11-21 01:05:28,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:05:28,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:05:28,051 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:05:28,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:05:28,165 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:05:28,167 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:05:28,386 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:05:28,522 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:05:28,523 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 01:05:28,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:05:28 BoogieIcfgContainer [2021-11-21 01:05:28,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:05:28,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:05:28,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:05:28,533 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:05:28,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:05:27" (1/3) ... [2021-11-21 01:05:28,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4608ebeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:05:28, skipping insertion in model container [2021-11-21 01:05:28,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:27" (2/3) ... [2021-11-21 01:05:28,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4608ebeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:05:28, skipping insertion in model container [2021-11-21 01:05:28,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:05:28" (3/3) ... [2021-11-21 01:05:28,553 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1251.c [2021-11-21 01:05:28,560 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:05:28,560 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-21 01:05:28,672 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:05:28,685 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 01:05:28,686 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-21 01:05:28,734 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 32 states have (on average 1.40625) internal successors, (45), 34 states have internal predecessors, (45), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 01:05:28,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-21 01:05:28,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:28,744 INFO L514 BasicCegarLoop]: trace histogram [2, 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 01:05:28,744 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:28,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:28,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1393628457, now seen corresponding path program 1 times [2021-11-21 01:05:28,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:05:28,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261393167] [2021-11-21 01:05:28,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:28,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:05:28,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:29,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:05:29,007 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:05:29,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261393167] [2021-11-21 01:05:29,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261393167] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:05:29,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:05:29,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:05:29,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089086737] [2021-11-21 01:05:29,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:05:29,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:05:29,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:05:29,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:05:29,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:05:29,050 INFO L87 Difference]: Start difference. First operand has 47 states, 32 states have (on average 1.40625) internal successors, (45), 34 states have internal predecessors, (45), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 01:05:29,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:29,177 INFO L93 Difference]: Finished difference Result 89 states and 125 transitions. [2021-11-21 01:05:29,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:05:29,180 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-11-21 01:05:29,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:29,188 INFO L225 Difference]: With dead ends: 89 [2021-11-21 01:05:29,189 INFO L226 Difference]: Without dead ends: 53 [2021-11-21 01:05:29,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:05:29,196 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 16 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:29,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 151 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:05:29,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-21 01:05:29,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2021-11-21 01:05:29,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 01:05:29,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2021-11-21 01:05:29,243 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 24 [2021-11-21 01:05:29,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:29,244 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2021-11-21 01:05:29,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 01:05:29,245 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2021-11-21 01:05:29,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-21 01:05:29,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:29,247 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 01:05:29,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:05:29,248 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:29,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:29,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1422555787, now seen corresponding path program 1 times [2021-11-21 01:05:29,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:05:29,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796770479] [2021-11-21 01:05:29,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:29,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:05:29,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:05:29,397 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:05:29,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796770479] [2021-11-21 01:05:29,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796770479] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:05:29,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:05:29,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:05:29,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278768427] [2021-11-21 01:05:29,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:05:29,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:05:29,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:05:29,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:05:29,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:05:29,406 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-21 01:05:29,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:29,448 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2021-11-21 01:05:29,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:05:29,449 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2021-11-21 01:05:29,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:29,451 INFO L225 Difference]: With dead ends: 49 [2021-11-21 01:05:29,451 INFO L226 Difference]: Without dead ends: 47 [2021-11-21 01:05:29,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:05:29,454 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:29,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 99 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:05:29,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-21 01:05:29,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-21 01:05:29,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 01:05:29,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2021-11-21 01:05:29,478 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 29 [2021-11-21 01:05:29,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:29,478 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2021-11-21 01:05:29,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-21 01:05:29,479 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2021-11-21 01:05:29,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-21 01:05:29,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:29,481 INFO L514 BasicCegarLoop]: trace histogram [4, 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 01:05:29,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:05:29,482 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:29,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:29,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1278819550, now seen corresponding path program 1 times [2021-11-21 01:05:29,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:05:29,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669077121] [2021-11-21 01:05:29,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:29,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:05:29,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 01:05:29,545 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-21 01:05:29,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 01:05:29,667 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-21 01:05:29,667 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-21 01:05:29,668 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-21 01:05:29,670 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-21 01:05:29,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:05:29,675 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-11-21 01:05:29,678 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 01:05:29,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 01:05:29 BoogieIcfgContainer [2021-11-21 01:05:29,715 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 01:05:29,716 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 01:05:29,716 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 01:05:29,717 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 01:05:29,717 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:05:28" (3/4) ... [2021-11-21 01:05:29,720 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-21 01:05:29,720 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 01:05:29,721 INFO L158 Benchmark]: Toolchain (without parser) took 2197.64ms. Allocated memory was 90.2MB in the beginning and 123.7MB in the end (delta: 33.6MB). Free memory was 53.4MB in the beginning and 72.1MB in the end (delta: -18.7MB). Peak memory consumption was 15.0MB. Max. memory is 16.1GB. [2021-11-21 01:05:29,722 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 90.2MB. Free memory was 70.1MB in the beginning and 70.0MB in the end (delta: 50.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:05:29,723 INFO L158 Benchmark]: CACSL2BoogieTranslator took 338.83ms. Allocated memory was 90.2MB in the beginning and 123.7MB in the end (delta: 33.6MB). Free memory was 53.2MB in the beginning and 99.4MB in the end (delta: -46.2MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. [2021-11-21 01:05:29,723 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.77ms. Allocated memory is still 123.7MB. Free memory was 99.4MB in the beginning and 97.6MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:05:29,724 INFO L158 Benchmark]: Boogie Preprocessor took 30.26ms. Allocated memory is still 123.7MB. Free memory was 97.6MB in the beginning and 96.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:05:29,725 INFO L158 Benchmark]: RCFGBuilder took 586.03ms. Allocated memory is still 123.7MB. Free memory was 96.4MB in the beginning and 80.2MB in the end (delta: 16.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-21 01:05:29,726 INFO L158 Benchmark]: TraceAbstraction took 1187.80ms. Allocated memory is still 123.7MB. Free memory was 80.0MB in the beginning and 72.6MB in the end (delta: 7.4MB). Peak memory consumption was 9.3MB. Max. memory is 16.1GB. [2021-11-21 01:05:29,726 INFO L158 Benchmark]: Witness Printer took 4.09ms. Allocated memory is still 123.7MB. Free memory was 72.6MB in the beginning and 72.1MB in the end (delta: 461.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:05:29,730 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 90.2MB. Free memory was 70.1MB in the beginning and 70.0MB in the end (delta: 50.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 338.83ms. Allocated memory was 90.2MB in the beginning and 123.7MB in the end (delta: 33.6MB). Free memory was 53.2MB in the beginning and 99.4MB in the end (delta: -46.2MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.77ms. Allocated memory is still 123.7MB. Free memory was 99.4MB in the beginning and 97.6MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 30.26ms. Allocated memory is still 123.7MB. Free memory was 97.6MB in the beginning and 96.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 586.03ms. Allocated memory is still 123.7MB. Free memory was 96.4MB in the beginning and 80.2MB in the end (delta: 16.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 1187.80ms. Allocated memory is still 123.7MB. Free memory was 80.0MB in the beginning and 72.6MB in the end (delta: 7.4MB). Peak memory consumption was 9.3MB. Max. memory is 16.1GB. * Witness Printer took 4.09ms. Allocated memory is still 123.7MB. Free memory was 72.6MB in the beginning and 72.1MB in the end (delta: 461.4kB). 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: 76]: 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 75. Possible FailurePath: [L66] float x = __VERIFIER_nondet_float(); [L67] float y = __VERIFIER_nondet_float(); [L69] CALL, EXPR isnan_float(x) VAL [\old(x)=2139095042] [L57] return x != x; [L69] RET, EXPR isnan_float(x) VAL [isnan_float(x)=1, x=2139095042] [L69] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, x=2139095042] [L69] CALL, EXPR isnan_float(y) VAL [\old(x)=2139095043] [L57] return x != x; [L69] RET, EXPR isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=2139095042, y=2139095043] [L69] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=2139095042, y=2139095043] [L69-L70] (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) VAL [(isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y))=1, isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=2139095042, y=2139095043] [L69-L70] COND TRUE (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) [L72] CALL, EXPR fmax_float(x, y) [L46] CALL, EXPR __fpclassify_float(x) VAL [\old(x)=2139095042] [L23] __uint32_t w; VAL [\old(x)=2139095042, x=2139095042] [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L33-L34] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L36-L37] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L39] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L42] return 0; [L46] RET, EXPR __fpclassify_float(x) VAL [\old(x)=2139095042, \old(y)=2139095043, __fpclassify_float(x)=0, x=2139095042, y=2139095043] [L46] COND TRUE __fpclassify_float(x) == 0 [L47] return y; VAL [\old(x)=2139095042, \old(y)=2139095043, \result=2139095043, x=2139095042, y=2139095043] [L72] RET, EXPR fmax_float(x, y) [L72] float res = fmax_float(x, y); [L75] CALL, EXPR isnan_float(x) VAL [\old(x)=2139095042] [L57] return x != x; [L75] RET, EXPR isnan_float(x) VAL [isnan_float(x)=1, res=2139095043, x=2139095042, y=2139095043] [L75] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, res=2139095043, x=2139095042, y=2139095043] [L75] CALL, EXPR isnan_float(y) VAL [\old(x)=2139095043] [L57] return x != x; [L75] RET, EXPR isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, res=2139095043, x=2139095042, y=2139095043] [L75] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, res=2139095043, x=2139095042, y=2139095043] [L75] COND TRUE isnan_float(x) && !isnan_float(y) && res != y [L76] reach_error() VAL [res=2139095043, x=2139095042, y=2139095043] - UnprovableResult [Line: 82]: 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, 47 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 1.0s, OverallIterations: 3, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 18 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 16 mSDsluCounter, 250 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 151 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 46 IncrementalHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 110 mSDtfsCounter, 46 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=0, InterpolantAutomatonStates: 8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 2 MinimizatonAttempts, 7 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 86 NumberOfCodeBlocks, 86 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 51 ConstructedInterpolants, 0 QuantifiedInterpolants, 54 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 8/8 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 01:05:29,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/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_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/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_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1251.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/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_533da59b-3717-46a4-9431-57f0dc0c496a/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 de540e539c3db6027c1fdb04fcc6cae02aafb8aa58950d31054b2b0b8391af6d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:05:32,380 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:05:32,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:05:32,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:05:32,418 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:05:32,419 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:05:32,421 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:05:32,423 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:05:32,426 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:05:32,427 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:05:32,428 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:05:32,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:05:32,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:05:32,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:05:32,434 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:05:32,437 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:05:32,439 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:05:32,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:05:32,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:05:32,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:05:32,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:05:32,459 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:05:32,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:05:32,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:05:32,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:05:32,465 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:05:32,466 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:05:32,467 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:05:32,468 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:05:32,469 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:05:32,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:05:32,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:05:32,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:05:32,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:05:32,474 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:05:32,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:05:32,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:05:32,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:05:32,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:05:32,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:05:32,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:05:32,480 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-21 01:05:32,507 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:05:32,507 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:05:32,507 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:05:32,508 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:05:32,508 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:05:32,509 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:05:32,509 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:05:32,509 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:05:32,510 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:05:32,510 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:05:32,510 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:05:32,511 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:05:32,511 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:05:32,512 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:05:32,512 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:05:32,512 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:05:32,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:05:32,513 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:05:32,513 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:05:32,513 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 01:05:32,514 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 01:05:32,514 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:05:32,514 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:05:32,514 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:05:32,515 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:05:32,515 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:05:32,515 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 01:05:32,516 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:05:32,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:05:32,516 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:05:32,516 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:05:32,517 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:05:32,517 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 01:05:32,517 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 01:05:32,517 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:05:32,518 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:05:32,518 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:05:32,518 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_533da59b-3717-46a4-9431-57f0dc0c496a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de540e539c3db6027c1fdb04fcc6cae02aafb8aa58950d31054b2b0b8391af6d [2021-11-21 01:05:32,953 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:05:32,981 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:05:32,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:05:32,986 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:05:32,987 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:05:32,989 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/float-newlib/float_req_bl_1251.c [2021-11-21 01:05:33,070 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/data/f5dd6bd24/cf0b894deaf84f09b7b9855162bf1c2f/FLAG5cbc5c8e6 [2021-11-21 01:05:33,612 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:05:33,617 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/sv-benchmarks/c/float-newlib/float_req_bl_1251.c [2021-11-21 01:05:33,626 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/data/f5dd6bd24/cf0b894deaf84f09b7b9855162bf1c2f/FLAG5cbc5c8e6 [2021-11-21 01:05:33,956 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/data/f5dd6bd24/cf0b894deaf84f09b7b9855162bf1c2f [2021-11-21 01:05:33,959 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:05:33,960 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:05:33,962 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:05:33,962 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:05:33,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:05:33,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:05:33" (1/1) ... [2021-11-21 01:05:33,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eea708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:33, skipping insertion in model container [2021-11-21 01:05:33,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:05:33" (1/1) ... [2021-11-21 01:05:33,980 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:05:34,002 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:05:34,198 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_533da59b-3717-46a4-9431-57f0dc0c496a/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[1980,1993] [2021-11-21 01:05:34,212 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_533da59b-3717-46a4-9431-57f0dc0c496a/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[2139,2152] [2021-11-21 01:05:34,213 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:05:34,233 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:05:34,258 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_533da59b-3717-46a4-9431-57f0dc0c496a/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[1980,1993] [2021-11-21 01:05:34,259 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_533da59b-3717-46a4-9431-57f0dc0c496a/sv-benchmarks/c/float-newlib/float_req_bl_1251.c[2139,2152] [2021-11-21 01:05:34,260 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:05:34,277 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:05:34,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:34 WrapperNode [2021-11-21 01:05:34,278 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:05:34,279 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:05:34,280 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:05:34,280 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:05:34,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:34" (1/1) ... [2021-11-21 01:05:34,301 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:34" (1/1) ... [2021-11-21 01:05:34,324 INFO L137 Inliner]: procedures = 21, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 98 [2021-11-21 01:05:34,325 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:05:34,326 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:05:34,326 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:05:34,326 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:05:34,335 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:34" (1/1) ... [2021-11-21 01:05:34,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:34" (1/1) ... [2021-11-21 01:05:34,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:34" (1/1) ... [2021-11-21 01:05:34,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:34" (1/1) ... [2021-11-21 01:05:34,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:34" (1/1) ... [2021-11-21 01:05:34,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:34" (1/1) ... [2021-11-21 01:05:34,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:34" (1/1) ... [2021-11-21 01:05:34,361 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:05:34,362 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:05:34,362 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:05:34,363 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:05:34,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:34" (1/1) ... [2021-11-21 01:05:34,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:05:34,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:05:34,406 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:05:34,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:05:34,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:05:34,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-21 01:05:34,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:05:34,461 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2021-11-21 01:05:34,461 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2021-11-21 01:05:34,461 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2021-11-21 01:05:34,461 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2021-11-21 01:05:34,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-21 01:05:34,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:05:34,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:05:34,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2021-11-21 01:05:34,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:05:34,544 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:05:34,546 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:05:34,847 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:05:34,854 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:05:34,854 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 01:05:34,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:05:34 BoogieIcfgContainer [2021-11-21 01:05:34,857 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:05:34,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:05:34,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:05:34,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:05:34,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:05:33" (1/3) ... [2021-11-21 01:05:34,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c679a35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:05:34, skipping insertion in model container [2021-11-21 01:05:34,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:05:34" (2/3) ... [2021-11-21 01:05:34,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c679a35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:05:34, skipping insertion in model container [2021-11-21 01:05:34,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:05:34" (3/3) ... [2021-11-21 01:05:34,865 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1251.c [2021-11-21 01:05:34,870 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:05:34,871 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-21 01:05:34,940 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:05:34,951 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 01:05:34,951 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-21 01:05:34,993 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 40 states have (on average 1.475) internal successors, (59), 42 states have internal predecessors, (59), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 01:05:34,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-21 01:05:34,999 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:35,000 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 01:05:35,000 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:35,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:35,012 INFO L85 PathProgramCache]: Analyzing trace with hash 956195031, now seen corresponding path program 1 times [2021-11-21 01:05:35,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:05:35,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1866310278] [2021-11-21 01:05:35,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:35,026 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:05:35,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:05:35,032 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:05:35,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 01:05:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:35,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-21 01:05:35,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:35,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:05:35,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:35,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 01:05:35,481 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:05:35,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1866310278] [2021-11-21 01:05:35,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1866310278] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:05:35,495 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:05:35,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 01:05:35,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021824340] [2021-11-21 01:05:35,498 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:05:35,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 01:05:35,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:05:35,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 01:05:35,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:05:35,562 INFO L87 Difference]: Start difference. First operand has 55 states, 40 states have (on average 1.475) internal successors, (59), 42 states have internal predecessors, (59), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-21 01:05:35,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:35,605 INFO L93 Difference]: Finished difference Result 93 states and 134 transitions. [2021-11-21 01:05:35,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 01:05:35,607 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-11-21 01:05:35,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:35,617 INFO L225 Difference]: With dead ends: 93 [2021-11-21 01:05:35,618 INFO L226 Difference]: Without dead ends: 51 [2021-11-21 01:05:35,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 52 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 01:05:35,626 INFO L933 BasicCegarLoop]: 75 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, 75 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 01:05:35,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:05:35,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-21 01:05:35,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-21 01:05:35,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 38 states have internal predecessors, (50), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 01:05:35,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2021-11-21 01:05:35,688 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 27 [2021-11-21 01:05:35,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:35,690 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2021-11-21 01:05:35,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-21 01:05:35,691 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2021-11-21 01:05:35,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-21 01:05:35,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:35,694 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 01:05:35,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:35,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:05:35,911 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:35,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:35,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1128254016, now seen corresponding path program 1 times [2021-11-21 01:05:35,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:05:35,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [314514029] [2021-11-21 01:05:35,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:35,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:05:35,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:05:35,915 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:05:35,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 01:05:36,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:36,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:05:36,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:36,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:05:36,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 01:05:36,269 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:05:36,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [314514029] [2021-11-21 01:05:36,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [314514029] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:05:36,270 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:05:36,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-21 01:05:36,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552517468] [2021-11-21 01:05:36,271 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:05:36,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:05:36,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:05:36,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:05:36,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:05:36,274 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:05:36,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:36,339 INFO L93 Difference]: Finished difference Result 96 states and 131 transitions. [2021-11-21 01:05:36,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:05:36,340 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 28 [2021-11-21 01:05:36,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:36,341 INFO L225 Difference]: With dead ends: 96 [2021-11-21 01:05:36,341 INFO L226 Difference]: Without dead ends: 60 [2021-11-21 01:05:36,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:05:36,344 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 16 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:36,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 191 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:05:36,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-21 01:05:36,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2021-11-21 01:05:36,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 40 states have internal predecessors, (52), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 01:05:36,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2021-11-21 01:05:36,359 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 28 [2021-11-21 01:05:36,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:36,359 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2021-11-21 01:05:36,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:05:36,360 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2021-11-21 01:05:36,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-21 01:05:36,361 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:36,362 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 01:05:36,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:36,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:05:36,574 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:36,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:36,575 INFO L85 PathProgramCache]: Analyzing trace with hash 987158491, now seen corresponding path program 1 times [2021-11-21 01:05:36,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:05:36,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556257622] [2021-11-21 01:05:36,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:36,576 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:05:36,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:05:36,577 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:05:36,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-21 01:05:36,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:36,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:05:36,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 01:05:36,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:36,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:05:36,818 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:05:36,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556257622] [2021-11-21 01:05:36,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556257622] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:05:36,819 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:05:36,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 01:05:36,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829498954] [2021-11-21 01:05:36,820 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:05:36,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:05:36,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:05:36,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:05:36,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:05:36,822 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-21 01:05:36,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:36,856 INFO L93 Difference]: Finished difference Result 79 states and 106 transitions. [2021-11-21 01:05:36,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:05:36,856 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 33 [2021-11-21 01:05:36,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:36,859 INFO L225 Difference]: With dead ends: 79 [2021-11-21 01:05:36,860 INFO L226 Difference]: Without dead ends: 59 [2021-11-21 01:05:36,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:05:36,862 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 0 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:36,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 330 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:05:36,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-21 01:05:36,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-11-21 01:05:36,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 42 states have internal predecessors, (54), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-21 01:05:36,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2021-11-21 01:05:36,873 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 33 [2021-11-21 01:05:36,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:36,873 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2021-11-21 01:05:36,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-21 01:05:36,874 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2021-11-21 01:05:36,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-21 01:05:36,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:36,876 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 01:05:36,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:37,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:05:37,091 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:37,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:37,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1662589572, now seen corresponding path program 1 times [2021-11-21 01:05:37,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:05:37,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1839084306] [2021-11-21 01:05:37,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:37,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:05:37,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:05:37,094 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:05:37,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-21 01:05:37,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:37,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:05:37,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:37,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 01:05:37,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:37,937 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 01:05:37,938 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:05:37,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1839084306] [2021-11-21 01:05:37,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1839084306] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:37,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [781527596] [2021-11-21 01:05:37,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:37,942 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:05:37,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:05:37,949 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:05:37,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-21 01:05:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:38,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:05:38,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:05:38,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 01:05:38,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [781527596] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:05:38,260 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:05:38,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8, 9] total 14 [2021-11-21 01:05:38,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385975164] [2021-11-21 01:05:38,261 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:05:38,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:05:38,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:05:38,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:05:38,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:05:38,263 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-21 01:05:38,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:38,280 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2021-11-21 01:05:38,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:05:38,280 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 36 [2021-11-21 01:05:38,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:38,282 INFO L225 Difference]: With dead ends: 59 [2021-11-21 01:05:38,282 INFO L226 Difference]: Without dead ends: 57 [2021-11-21 01:05:38,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:05:38,284 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 0 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:38,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 132 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:05:38,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-21 01:05:38,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-21 01:05:38,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 43 states have internal predecessors, (55), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-21 01:05:38,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 77 transitions. [2021-11-21 01:05:38,294 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 77 transitions. Word has length 36 [2021-11-21 01:05:38,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:38,294 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 77 transitions. [2021-11-21 01:05:38,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-21 01:05:38,295 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 77 transitions. [2021-11-21 01:05:38,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-21 01:05:38,297 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:38,297 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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 01:05:38,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:38,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:38,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:05:38,699 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:38,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:38,700 INFO L85 PathProgramCache]: Analyzing trace with hash -490349503, now seen corresponding path program 1 times [2021-11-21 01:05:38,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:05:38,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [585891125] [2021-11-21 01:05:38,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:38,701 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:05:38,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:05:38,703 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:05:38,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-21 01:05:38,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:38,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:05:38,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:05:39,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:39,979 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:05:39,979 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:05:39,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [585891125] [2021-11-21 01:05:39,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [585891125] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:39,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [185099029] [2021-11-21 01:05:39,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:39,980 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:05:39,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:05:39,984 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:05:40,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-21 01:05:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:40,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:05:40,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:40,751 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:05:40,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:40,942 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:05:40,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [185099029] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:40,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294756698] [2021-11-21 01:05:40,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:40,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:40,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:05:40,945 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:05:40,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:05:41,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:41,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:05:41,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:41,521 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 01:05:41,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:41,978 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:05:41,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294756698] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:05:41,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-21 01:05:41,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 9, 9, 9, 10] total 28 [2021-11-21 01:05:41,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916007135] [2021-11-21 01:05:41,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:05:41,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:05:41,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:05:41,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:05:41,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-11-21 01:05:41,981 INFO L87 Difference]: Start difference. First operand 57 states and 77 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-21 01:05:42,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:42,795 INFO L93 Difference]: Finished difference Result 75 states and 100 transitions. [2021-11-21 01:05:42,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 01:05:42,796 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2021-11-21 01:05:42,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:42,797 INFO L225 Difference]: With dead ends: 75 [2021-11-21 01:05:42,798 INFO L226 Difference]: Without dead ends: 73 [2021-11-21 01:05:42,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2021-11-21 01:05:42,800 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 52 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:42,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 333 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:05:42,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-21 01:05:42,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2021-11-21 01:05:42,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 47 states have internal predecessors, (60), 12 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (14), 13 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-21 01:05:42,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 86 transitions. [2021-11-21 01:05:42,813 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 86 transitions. Word has length 41 [2021-11-21 01:05:42,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:42,814 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 86 transitions. [2021-11-21 01:05:42,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-21 01:05:42,814 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 86 transitions. [2021-11-21 01:05:42,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-21 01:05:42,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:42,816 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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 01:05:42,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:43,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:43,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:43,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:05:43,421 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:43,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:43,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1869413518, now seen corresponding path program 1 times [2021-11-21 01:05:43,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:05:43,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1598656320] [2021-11-21 01:05:43,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:43,423 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:05:43,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:05:43,424 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:05:43,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-21 01:05:43,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:43,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:05:43,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:43,831 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 01:05:43,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:44,186 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 01:05:44,186 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:05:44,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1598656320] [2021-11-21 01:05:44,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1598656320] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:44,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1741594924] [2021-11-21 01:05:44,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:44,187 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:05:44,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:05:44,188 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:05:44,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-21 01:05:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:44,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:05:44,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:44,454 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:05:44,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:44,527 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:05:44,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1741594924] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:05:44,527 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:05:44,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8, 9] total 14 [2021-11-21 01:05:44,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128027952] [2021-11-21 01:05:44,529 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:05:44,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:05:44,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:05:44,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:05:44,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:05:44,538 INFO L87 Difference]: Start difference. First operand 63 states and 86 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-21 01:05:44,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:44,550 INFO L93 Difference]: Finished difference Result 66 states and 88 transitions. [2021-11-21 01:05:44,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:05:44,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2021-11-21 01:05:44,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:44,555 INFO L225 Difference]: With dead ends: 66 [2021-11-21 01:05:44,555 INFO L226 Difference]: Without dead ends: 63 [2021-11-21 01:05:44,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:05:44,560 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:44,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 134 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:05:44,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-21 01:05:44,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-11-21 01:05:44,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 47 states have internal predecessors, (59), 12 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (14), 13 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-21 01:05:44,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2021-11-21 01:05:44,582 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 43 [2021-11-21 01:05:44,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:44,583 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2021-11-21 01:05:44,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-21 01:05:44,584 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2021-11-21 01:05:44,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-21 01:05:44,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:44,591 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-21 01:05:44,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:44,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:45,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:05:45,013 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:45,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:45,014 INFO L85 PathProgramCache]: Analyzing trace with hash 972082008, now seen corresponding path program 1 times [2021-11-21 01:05:45,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:05:45,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2108542031] [2021-11-21 01:05:45,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:45,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:05:45,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:05:45,015 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:05:45,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-21 01:05:45,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:45,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:05:45,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:45,176 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:05:45,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:45,282 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:05:45,282 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:05:45,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2108542031] [2021-11-21 01:05:45,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2108542031] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:05:45,283 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:05:45,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 01:05:45,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083211989] [2021-11-21 01:05:45,284 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:05:45,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:05:45,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:05:45,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:05:45,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:05:45,286 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-21 01:05:45,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:45,319 INFO L93 Difference]: Finished difference Result 88 states and 116 transitions. [2021-11-21 01:05:45,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:05:45,319 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 46 [2021-11-21 01:05:45,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:45,321 INFO L225 Difference]: With dead ends: 88 [2021-11-21 01:05:45,321 INFO L226 Difference]: Without dead ends: 67 [2021-11-21 01:05:45,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:05:45,323 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:45,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 263 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:05:45,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-21 01:05:45,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2021-11-21 01:05:45,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 47 states have internal predecessors, (60), 12 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (14), 14 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-21 01:05:45,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2021-11-21 01:05:45,332 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 46 [2021-11-21 01:05:45,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:45,332 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2021-11-21 01:05:45,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-21 01:05:45,333 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2021-11-21 01:05:45,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-21 01:05:45,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:45,335 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-21 01:05:45,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:45,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:05:45,548 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:45,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:45,549 INFO L85 PathProgramCache]: Analyzing trace with hash -877982242, now seen corresponding path program 1 times [2021-11-21 01:05:45,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:05:45,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771955610] [2021-11-21 01:05:45,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:45,549 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:05:45,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:05:45,551 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:05:45,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-21 01:05:45,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:45,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:05:45,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:45,845 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:05:45,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:46,523 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:05:46,523 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:05:46,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771955610] [2021-11-21 01:05:46,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771955610] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:46,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2046986867] [2021-11-21 01:05:46,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:46,524 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:05:46,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:05:46,525 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:05:46,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-21 01:05:46,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:46,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:05:46,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:47,014 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:05:47,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:47,282 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:05:47,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2046986867] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:47,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906323636] [2021-11-21 01:05:47,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:47,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:47,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:05:47,284 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:05:47,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-21 01:05:47,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:47,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 01:05:47,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:47,655 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:05:47,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:48,188 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:05:48,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906323636] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:48,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:05:48,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 18 [2021-11-21 01:05:48,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288846251] [2021-11-21 01:05:48,189 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:05:48,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-21 01:05:48,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:05:48,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-21 01:05:48,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-11-21 01:05:48,191 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 15 states have internal predecessors, (59), 9 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (19), 11 states have call predecessors, (19), 9 states have call successors, (19) [2021-11-21 01:05:48,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:48,618 INFO L93 Difference]: Finished difference Result 108 states and 145 transitions. [2021-11-21 01:05:48,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 01:05:48,618 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 15 states have internal predecessors, (59), 9 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (19), 11 states have call predecessors, (19), 9 states have call successors, (19) Word has length 48 [2021-11-21 01:05:48,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:48,620 INFO L225 Difference]: With dead ends: 108 [2021-11-21 01:05:48,620 INFO L226 Difference]: Without dead ends: 86 [2021-11-21 01:05:48,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:05:48,622 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 68 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:48,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 455 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 114 Invalid, 0 Unknown, 112 Unchecked, 0.3s Time] [2021-11-21 01:05:48,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-21 01:05:48,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 77. [2021-11-21 01:05:48,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 57 states have (on average 1.263157894736842) internal successors, (72), 55 states have internal predecessors, (72), 15 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (19), 19 states have call predecessors, (19), 15 states have call successors, (19) [2021-11-21 01:05:48,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 106 transitions. [2021-11-21 01:05:48,647 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 106 transitions. Word has length 48 [2021-11-21 01:05:48,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:48,648 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 106 transitions. [2021-11-21 01:05:48,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 15 states have internal predecessors, (59), 9 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (19), 11 states have call predecessors, (19), 9 states have call successors, (19) [2021-11-21 01:05:48,648 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 106 transitions. [2021-11-21 01:05:48,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-21 01:05:48,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:48,657 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-21 01:05:48,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:48,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:49,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:49,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:05:49,271 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:49,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:49,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1899050596, now seen corresponding path program 1 times [2021-11-21 01:05:49,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:05:49,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1570027043] [2021-11-21 01:05:49,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:49,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:05:49,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:05:49,273 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:05:49,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-21 01:05:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:49,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:05:49,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:49,787 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 01:05:49,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:50,707 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 01:05:50,707 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:05:50,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1570027043] [2021-11-21 01:05:50,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1570027043] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:05:50,707 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:05:50,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 17 [2021-11-21 01:05:50,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707474111] [2021-11-21 01:05:50,708 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:05:50,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-21 01:05:50,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:05:50,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-21 01:05:50,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-11-21 01:05:50,709 INFO L87 Difference]: Start difference. First operand 77 states and 106 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 5 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-21 01:05:51,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:51,595 INFO L93 Difference]: Finished difference Result 125 states and 165 transitions. [2021-11-21 01:05:51,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:05:51,596 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 5 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) Word has length 48 [2021-11-21 01:05:51,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:51,598 INFO L225 Difference]: With dead ends: 125 [2021-11-21 01:05:51,598 INFO L226 Difference]: Without dead ends: 123 [2021-11-21 01:05:51,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-11-21 01:05:51,599 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 119 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:51,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 598 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:05:51,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-21 01:05:51,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 84. [2021-11-21 01:05:51,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 63 states have (on average 1.253968253968254) internal successors, (79), 60 states have internal predecessors, (79), 15 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (23), 21 states have call predecessors, (23), 15 states have call successors, (23) [2021-11-21 01:05:51,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2021-11-21 01:05:51,610 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 48 [2021-11-21 01:05:51,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:51,610 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2021-11-21 01:05:51,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 5 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-21 01:05:51,611 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2021-11-21 01:05:51,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-21 01:05:51,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:51,613 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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 01:05:51,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:51,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:05:51,826 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:51,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:51,827 INFO L85 PathProgramCache]: Analyzing trace with hash 2112773896, now seen corresponding path program 1 times [2021-11-21 01:05:51,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:05:51,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1007109393] [2021-11-21 01:05:51,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:51,827 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:05:51,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:05:51,828 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:05:51,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-21 01:05:51,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:51,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:05:51,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:52,130 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 01:05:52,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:05:52,453 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:05:52,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1007109393] [2021-11-21 01:05:52,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1007109393] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:52,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [465926192] [2021-11-21 01:05:52,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:52,454 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:05:52,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:05:52,455 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:05:52,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-21 01:05:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:52,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:05:52,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:53,152 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:05:53,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:53,554 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:05:53,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [465926192] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:53,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168438442] [2021-11-21 01:05:53,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:53,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:53,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:05:53,556 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:05:53,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-21 01:05:53,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:53,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-21 01:05:53,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 01:05:53,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:54,432 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:05:54,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168438442] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:54,433 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:05:54,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9, 10, 12, 12] total 27 [2021-11-21 01:05:54,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973354098] [2021-11-21 01:05:54,433 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:05:54,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-21 01:05:54,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:05:54,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-21 01:05:54,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-11-21 01:05:54,435 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 17 states have internal predecessors, (67), 4 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (21), 14 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-21 01:05:56,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:05:56,325 INFO L93 Difference]: Finished difference Result 169 states and 231 transitions. [2021-11-21 01:05:56,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-21 01:05:56,325 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 17 states have internal predecessors, (67), 4 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (21), 14 states have call predecessors, (21), 4 states have call successors, (21) Word has length 48 [2021-11-21 01:05:56,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:05:56,327 INFO L225 Difference]: With dead ends: 169 [2021-11-21 01:05:56,327 INFO L226 Difference]: Without dead ends: 136 [2021-11-21 01:05:56,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=268, Invalid=1454, Unknown=0, NotChecked=0, Total=1722 [2021-11-21 01:05:56,329 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 213 mSDsluCounter, 1266 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:05:56,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 1341 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-21 01:05:56,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-21 01:05:56,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 115. [2021-11-21 01:05:56,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 86 states have (on average 1.2093023255813953) internal successors, (104), 82 states have internal predecessors, (104), 23 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (34), 30 states have call predecessors, (34), 23 states have call successors, (34) [2021-11-21 01:05:56,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 161 transitions. [2021-11-21 01:05:56,348 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 161 transitions. Word has length 48 [2021-11-21 01:05:56,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:05:56,348 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 161 transitions. [2021-11-21 01:05:56,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 17 states have internal predecessors, (67), 4 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (21), 14 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-21 01:05:56,349 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 161 transitions. [2021-11-21 01:05:56,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-21 01:05:56,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:05:56,351 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-21 01:05:56,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:56,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-11-21 01:05:56,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-21 01:05:56,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:56,965 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:05:56,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:05:56,965 INFO L85 PathProgramCache]: Analyzing trace with hash 113915812, now seen corresponding path program 1 times [2021-11-21 01:05:56,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:05:56,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [944643743] [2021-11-21 01:05:56,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:56,966 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:05:56,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:05:56,967 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:05:56,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-21 01:05:57,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:57,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 01:05:57,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:57,691 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:05:57,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:05:58,055 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:05:58,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [944643743] [2021-11-21 01:05:58,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [944643743] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:58,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [66560843] [2021-11-21 01:05:58,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:58,056 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:05:58,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:05:58,057 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:05:58,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-21 01:05:58,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:58,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 01:05:58,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:58,696 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:05:58,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:58,871 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:05:58,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [66560843] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:58,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334516340] [2021-11-21 01:05:58,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:05:58,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:05:58,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:05:58,873 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:05:58,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-21 01:05:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:05:58,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-21 01:05:58,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:05:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 01:05:59,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:05:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:05:59,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334516340] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:05:59,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:05:59,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10, 10, 14, 13] total 24 [2021-11-21 01:05:59,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513502739] [2021-11-21 01:05:59,830 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:05:59,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-21 01:05:59,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:05:59,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-21 01:05:59,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-11-21 01:05:59,832 INFO L87 Difference]: Start difference. First operand 115 states and 161 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 19 states have internal predecessors, (54), 5 states have call successors, (10), 1 states have call predecessors, (10), 4 states have return successors, (14), 10 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-21 01:06:00,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:06:00,817 INFO L93 Difference]: Finished difference Result 128 states and 174 transitions. [2021-11-21 01:06:00,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 01:06:00,817 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 19 states have internal predecessors, (54), 5 states have call successors, (10), 1 states have call predecessors, (10), 4 states have return successors, (14), 10 states have call predecessors, (14), 5 states have call successors, (14) Word has length 49 [2021-11-21 01:06:00,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:06:00,819 INFO L225 Difference]: With dead ends: 128 [2021-11-21 01:06:00,820 INFO L226 Difference]: Without dead ends: 116 [2021-11-21 01:06:00,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2021-11-21 01:06:00,821 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 118 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:06:00,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 837 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:06:00,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-21 01:06:00,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2021-11-21 01:06:00,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 83 states have (on average 1.2048192771084338) internal successors, (100), 80 states have internal predecessors, (100), 23 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (33), 29 states have call predecessors, (33), 23 states have call successors, (33) [2021-11-21 01:06:00,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 156 transitions. [2021-11-21 01:06:00,833 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 156 transitions. Word has length 49 [2021-11-21 01:06:00,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:06:00,834 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 156 transitions. [2021-11-21 01:06:00,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 19 states have internal predecessors, (54), 5 states have call successors, (10), 1 states have call predecessors, (10), 4 states have return successors, (14), 10 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-21 01:06:00,834 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 156 transitions. [2021-11-21 01:06:00,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-21 01:06:00,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:06:00,836 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-21 01:06:00,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-21 01:06:01,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-21 01:06:01,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-21 01:06:01,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:06:01,439 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:06:01,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:06:01,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1549749125, now seen corresponding path program 1 times [2021-11-21 01:06:01,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:06:01,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1639925230] [2021-11-21 01:06:01,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:01,441 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:06:01,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:06:01,442 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:06:01,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-21 01:06:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:01,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-21 01:06:01,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 01:06:02,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:03,817 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 01:06:03,818 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:06:03,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1639925230] [2021-11-21 01:06:03,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1639925230] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:06:03,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:06:03,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 24 [2021-11-21 01:06:03,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852999497] [2021-11-21 01:06:03,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:06:03,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 01:06:03,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:06:03,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 01:06:03,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-11-21 01:06:03,821 INFO L87 Difference]: Start difference. First operand 112 states and 156 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 01:06:04,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:06:04,726 INFO L93 Difference]: Finished difference Result 130 states and 181 transitions. [2021-11-21 01:06:04,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-21 01:06:04,727 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 49 [2021-11-21 01:06:04,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:06:04,728 INFO L225 Difference]: With dead ends: 130 [2021-11-21 01:06:04,728 INFO L226 Difference]: Without dead ends: 113 [2021-11-21 01:06:04,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 01:06:04,729 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 69 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:06:04,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 644 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 362 Invalid, 0 Unknown, 71 Unchecked, 0.4s Time] [2021-11-21 01:06:04,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-21 01:06:04,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 100. [2021-11-21 01:06:04,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 72 states have internal predecessors, (91), 19 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (27), 25 states have call predecessors, (27), 19 states have call successors, (27) [2021-11-21 01:06:04,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 137 transitions. [2021-11-21 01:06:04,740 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 137 transitions. Word has length 49 [2021-11-21 01:06:04,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:06:04,740 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 137 transitions. [2021-11-21 01:06:04,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 01:06:04,740 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 137 transitions. [2021-11-21 01:06:04,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-21 01:06:04,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:06:04,742 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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 01:06:04,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-21 01:06:04,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:06:04,955 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:06:04,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:06:04,955 INFO L85 PathProgramCache]: Analyzing trace with hash -250451865, now seen corresponding path program 1 times [2021-11-21 01:06:04,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:06:04,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1991135420] [2021-11-21 01:06:04,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:04,956 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:06:04,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:06:04,957 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:06:04,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-21 01:06:05,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:05,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:06:05,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:05,266 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:06:05,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:05,557 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:06:05,557 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:06:05,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1991135420] [2021-11-21 01:06:05,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1991135420] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:06:05,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:06:05,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 12 [2021-11-21 01:06:05,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976701954] [2021-11-21 01:06:05,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:06:05,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:06:05,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:06:05,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:06:05,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:06:05,559 INFO L87 Difference]: Start difference. First operand 100 states and 137 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 01:06:05,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:06:05,859 INFO L93 Difference]: Finished difference Result 174 states and 232 transitions. [2021-11-21 01:06:05,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 01:06:05,860 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 50 [2021-11-21 01:06:05,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:06:05,861 INFO L225 Difference]: With dead ends: 174 [2021-11-21 01:06:05,861 INFO L226 Difference]: Without dead ends: 116 [2021-11-21 01:06:05,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-11-21 01:06:05,862 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 54 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:06:05,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 358 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:06:05,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-21 01:06:05,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 100. [2021-11-21 01:06:05,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 75 states have (on average 1.2) internal successors, (90), 72 states have internal predecessors, (90), 19 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (27), 25 states have call predecessors, (27), 19 states have call successors, (27) [2021-11-21 01:06:05,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 136 transitions. [2021-11-21 01:06:05,873 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 136 transitions. Word has length 50 [2021-11-21 01:06:05,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:06:05,873 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 136 transitions. [2021-11-21 01:06:05,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 01:06:05,874 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 136 transitions. [2021-11-21 01:06:05,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-21 01:06:05,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:06:05,875 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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, 1] [2021-11-21 01:06:05,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-21 01:06:06,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:06:06,088 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:06:06,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:06:06,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1451512262, now seen corresponding path program 1 times [2021-11-21 01:06:06,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:06:06,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108208858] [2021-11-21 01:06:06,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:06,089 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:06:06,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:06:06,090 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:06:06,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-21 01:06:06,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:06,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-21 01:06:06,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:06,943 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 01:06:06,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-21 01:06:08,557 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:06:08,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108208858] [2021-11-21 01:06:08,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [108208858] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:06:08,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1826405737] [2021-11-21 01:06:08,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:08,558 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:06:08,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:06:08,561 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:06:08,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-21 01:06:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:08,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-21 01:06:08,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:09,187 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 01:06:09,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:10,349 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-21 01:06:10,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1826405737] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:06:10,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099105150] [2021-11-21 01:06:10,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:10,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:06:10,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:06:10,350 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:06:10,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-21 01:06:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:10,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-21 01:06:10,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:11,013 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 01:06:11,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:12,850 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-21 01:06:12,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099105150] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:06:12,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:06:12,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 16, 13] total 32 [2021-11-21 01:06:12,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390890541] [2021-11-21 01:06:12,851 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:06:12,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-21 01:06:12,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:06:12,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-21 01:06:12,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-11-21 01:06:12,853 INFO L87 Difference]: Start difference. First operand 100 states and 136 transitions. Second operand has 32 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 26 states have internal predecessors, (71), 7 states have call successors, (16), 2 states have call predecessors, (16), 7 states have return successors, (22), 10 states have call predecessors, (22), 7 states have call successors, (22) [2021-11-21 01:06:14,329 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 01:06:15,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:06:15,737 INFO L93 Difference]: Finished difference Result 217 states and 303 transitions. [2021-11-21 01:06:15,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-21 01:06:15,737 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 26 states have internal predecessors, (71), 7 states have call successors, (16), 2 states have call predecessors, (16), 7 states have return successors, (22), 10 states have call predecessors, (22), 7 states have call successors, (22) Word has length 55 [2021-11-21 01:06:15,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:06:15,739 INFO L225 Difference]: With dead ends: 217 [2021-11-21 01:06:15,739 INFO L226 Difference]: Without dead ends: 146 [2021-11-21 01:06:15,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 291 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=302, Invalid=1954, Unknown=0, NotChecked=0, Total=2256 [2021-11-21 01:06:15,741 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 102 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:06:15,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 1084 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 910 Invalid, 0 Unknown, 161 Unchecked, 2.0s Time] [2021-11-21 01:06:15,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-21 01:06:15,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 102. [2021-11-21 01:06:15,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 75 states have internal predecessors, (90), 20 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (28), 24 states have call predecessors, (28), 20 states have call successors, (28) [2021-11-21 01:06:15,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 138 transitions. [2021-11-21 01:06:15,754 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 138 transitions. Word has length 55 [2021-11-21 01:06:15,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:06:15,755 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 138 transitions. [2021-11-21 01:06:15,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 26 states have internal predecessors, (71), 7 states have call successors, (16), 2 states have call predecessors, (16), 7 states have return successors, (22), 10 states have call predecessors, (22), 7 states have call successors, (22) [2021-11-21 01:06:15,755 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 138 transitions. [2021-11-21 01:06:15,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-21 01:06:15,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:06:15,757 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-11-21 01:06:15,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-21 01:06:15,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-11-21 01:06:16,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-21 01:06:16,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:06:16,372 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:06:16,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:06:16,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1847293526, now seen corresponding path program 1 times [2021-11-21 01:06:16,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:06:16,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [836946022] [2021-11-21 01:06:16,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:16,374 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:06:16,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:06:16,375 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:06:16,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-21 01:06:16,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:16,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 01:06:16,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 01:06:16,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:06:17,011 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:06:17,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [836946022] [2021-11-21 01:06:17,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [836946022] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:06:17,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2062675840] [2021-11-21 01:06:17,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:17,012 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:06:17,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:06:17,012 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:06:17,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-21 01:06:17,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:17,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:06:17,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:17,248 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 01:06:17,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:17,381 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-21 01:06:17,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2062675840] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:06:17,381 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:06:17,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [9, 10] total 14 [2021-11-21 01:06:17,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152783368] [2021-11-21 01:06:17,383 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:06:17,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:06:17,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:06:17,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:06:17,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:06:17,384 INFO L87 Difference]: Start difference. First operand 102 states and 138 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, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-21 01:06:17,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:06:17,413 INFO L93 Difference]: Finished difference Result 151 states and 196 transitions. [2021-11-21 01:06:17,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:06:17,414 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, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 56 [2021-11-21 01:06:17,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:06:17,416 INFO L225 Difference]: With dead ends: 151 [2021-11-21 01:06:17,416 INFO L226 Difference]: Without dead ends: 98 [2021-11-21 01:06:17,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-21 01:06:17,420 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 4 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:06:17,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 183 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:06:17,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-21 01:06:17,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-11-21 01:06:17,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 72 states have internal predecessors, (85), 19 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (25), 23 states have call predecessors, (25), 19 states have call successors, (25) [2021-11-21 01:06:17,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 129 transitions. [2021-11-21 01:06:17,438 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 129 transitions. Word has length 56 [2021-11-21 01:06:17,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:06:17,439 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 129 transitions. [2021-11-21 01:06:17,439 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, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-21 01:06:17,439 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 129 transitions. [2021-11-21 01:06:17,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-21 01:06:17,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:06:17,442 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-11-21 01:06:17,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-21 01:06:17,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-21 01:06:17,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:06:17,857 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:06:17,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:06:17,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1290194610, now seen corresponding path program 1 times [2021-11-21 01:06:17,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:06:17,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1671456776] [2021-11-21 01:06:17,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:17,858 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:06:17,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:06:17,860 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:06:17,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-21 01:06:17,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:17,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:06:17,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:06:18,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:18,441 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:06:18,441 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:06:18,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1671456776] [2021-11-21 01:06:18,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1671456776] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:06:18,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [281161179] [2021-11-21 01:06:18,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:18,442 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:06:18,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:06:18,448 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:06:18,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-21 01:06:18,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:18,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:06:18,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:06:19,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 01:06:19,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [281161179] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:06:19,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:06:19,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 9, 11] total 26 [2021-11-21 01:06:19,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321377049] [2021-11-21 01:06:19,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:06:19,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:06:19,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:06:19,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:06:19,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-11-21 01:06:19,602 INFO L87 Difference]: Start difference. First operand 98 states and 129 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-21 01:06:20,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:06:20,245 INFO L93 Difference]: Finished difference Result 121 states and 157 transitions. [2021-11-21 01:06:20,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:06:20,246 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 56 [2021-11-21 01:06:20,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:06:20,247 INFO L225 Difference]: With dead ends: 121 [2021-11-21 01:06:20,247 INFO L226 Difference]: Without dead ends: 119 [2021-11-21 01:06:20,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 01:06:20,248 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 39 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:06:20,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 399 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:06:20,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-21 01:06:20,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 90. [2021-11-21 01:06:20,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 66 states have internal predecessors, (77), 19 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) [2021-11-21 01:06:20,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 117 transitions. [2021-11-21 01:06:20,257 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 117 transitions. Word has length 56 [2021-11-21 01:06:20,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:06:20,258 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 117 transitions. [2021-11-21 01:06:20,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-21 01:06:20,258 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 117 transitions. [2021-11-21 01:06:20,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-21 01:06:20,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:06:20,260 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-11-21 01:06:20,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-21 01:06:20,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-21 01:06:20,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:06:20,663 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:06:20,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:06:20,663 INFO L85 PathProgramCache]: Analyzing trace with hash -373470327, now seen corresponding path program 1 times [2021-11-21 01:06:20,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:06:20,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92631055] [2021-11-21 01:06:20,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:20,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:06:20,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:06:20,665 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:06:20,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-21 01:06:20,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:20,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:06:20,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:20,952 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:06:20,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:21,262 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:06:21,262 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:06:21,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92631055] [2021-11-21 01:06:21,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [92631055] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:06:21,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [172002062] [2021-11-21 01:06:21,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:21,263 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:06:21,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:06:21,264 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:06:21,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-21 01:06:21,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:21,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 01:06:21,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:21,677 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:06:21,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:21,940 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:06:21,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [172002062] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:06:21,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341705827] [2021-11-21 01:06:21,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:21,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:06:21,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:06:21,942 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:06:21,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-21 01:06:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:21,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 01:06:21,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:22,333 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:06:22,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:06:22,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341705827] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:06:22,726 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:06:22,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 9, 11, 10] total 23 [2021-11-21 01:06:22,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522708897] [2021-11-21 01:06:22,726 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:06:22,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-21 01:06:22,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:06:22,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-21 01:06:22,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-11-21 01:06:22,728 INFO L87 Difference]: Start difference. First operand 90 states and 117 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 15 states have internal predecessors, (63), 4 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (20), 12 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-21 01:06:23,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:06:23,813 INFO L93 Difference]: Finished difference Result 118 states and 149 transitions. [2021-11-21 01:06:23,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-21 01:06:23,816 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 15 states have internal predecessors, (63), 4 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (20), 12 states have call predecessors, (20), 4 states have call successors, (20) Word has length 56 [2021-11-21 01:06:23,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:06:23,817 INFO L225 Difference]: With dead ends: 118 [2021-11-21 01:06:23,818 INFO L226 Difference]: Without dead ends: 99 [2021-11-21 01:06:23,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=237, Invalid=1169, Unknown=0, NotChecked=0, Total=1406 [2021-11-21 01:06:23,820 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 193 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:06:23,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 643 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:06:23,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-21 01:06:23,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 72. [2021-11-21 01:06:23,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.150943396226415) internal successors, (61), 52 states have internal predecessors, (61), 15 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (17), 17 states have call predecessors, (17), 15 states have call successors, (17) [2021-11-21 01:06:23,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2021-11-21 01:06:23,830 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 56 [2021-11-21 01:06:23,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:06:23,831 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2021-11-21 01:06:23,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 15 states have internal predecessors, (63), 4 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (20), 12 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-21 01:06:23,832 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2021-11-21 01:06:23,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-21 01:06:23,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:06:23,834 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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 01:06:23,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-21 01:06:24,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-21 01:06:24,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-21 01:06:24,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:06:24,444 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:06:24,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:06:24,444 INFO L85 PathProgramCache]: Analyzing trace with hash 2059347801, now seen corresponding path program 1 times [2021-11-21 01:06:24,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:06:24,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [891809536] [2021-11-21 01:06:24,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:24,445 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:06:24,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:06:24,453 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:06:24,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-21 01:06:24,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:24,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:06:24,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:24,746 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:06:24,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:25,223 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-21 01:06:25,223 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:06:25,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [891809536] [2021-11-21 01:06:25,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [891809536] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:06:25,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:06:25,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-21 01:06:25,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700019264] [2021-11-21 01:06:25,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:06:25,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:06:25,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:06:25,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:06:25,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:06:25,225 INFO L87 Difference]: Start difference. First operand 72 states and 93 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-21 01:06:25,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:06:25,378 INFO L93 Difference]: Finished difference Result 89 states and 111 transitions. [2021-11-21 01:06:25,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:06:25,379 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2021-11-21 01:06:25,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:06:25,379 INFO L225 Difference]: With dead ends: 89 [2021-11-21 01:06:25,379 INFO L226 Difference]: Without dead ends: 72 [2021-11-21 01:06:25,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:06:25,380 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 17 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:06:25,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 269 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:06:25,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-21 01:06:25,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-11-21 01:06:25,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 52 states have internal predecessors, (60), 15 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (17), 17 states have call predecessors, (17), 15 states have call successors, (17) [2021-11-21 01:06:25,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2021-11-21 01:06:25,387 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 62 [2021-11-21 01:06:25,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:06:25,388 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2021-11-21 01:06:25,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-21 01:06:25,388 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2021-11-21 01:06:25,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-21 01:06:25,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:06:25,390 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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 01:06:25,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-11-21 01:06:25,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:06:25,604 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:06:25,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:06:25,604 INFO L85 PathProgramCache]: Analyzing trace with hash 253909467, now seen corresponding path program 1 times [2021-11-21 01:06:25,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:06:25,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1421649094] [2021-11-21 01:06:25,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:25,605 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:06:25,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:06:25,605 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:06:25,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-21 01:06:25,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:25,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 01:06:25,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:26,020 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:06:26,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:26,531 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-21 01:06:26,531 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:06:26,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1421649094] [2021-11-21 01:06:26,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1421649094] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:06:26,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:06:26,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 17 [2021-11-21 01:06:26,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252127602] [2021-11-21 01:06:26,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:06:26,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 01:06:26,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:06:26,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 01:06:26,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-11-21 01:06:26,534 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-21 01:06:26,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:06:26,895 INFO L93 Difference]: Finished difference Result 102 states and 128 transitions. [2021-11-21 01:06:26,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 01:06:26,896 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2021-11-21 01:06:26,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:06:26,896 INFO L225 Difference]: With dead ends: 102 [2021-11-21 01:06:26,896 INFO L226 Difference]: Without dead ends: 74 [2021-11-21 01:06:26,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:06:26,898 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 40 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:06:26,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 312 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:06:26,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-21 01:06:26,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-21 01:06:26,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 15 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (19), 17 states have call predecessors, (19), 15 states have call successors, (19) [2021-11-21 01:06:26,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2021-11-21 01:06:26,905 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 62 [2021-11-21 01:06:26,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:06:26,906 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2021-11-21 01:06:26,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-21 01:06:26,906 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2021-11-21 01:06:26,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-21 01:06:26,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:06:26,908 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1] [2021-11-21 01:06:26,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-21 01:06:27,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:06:27,122 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:06:27,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:06:27,123 INFO L85 PathProgramCache]: Analyzing trace with hash 647887735, now seen corresponding path program 1 times [2021-11-21 01:06:27,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:06:27,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940879927] [2021-11-21 01:06:27,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:27,124 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:06:27,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:06:27,125 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:06:27,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-21 01:06:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:27,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 01:06:27,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:27,522 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:06:27,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-21 01:06:28,882 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:06:28,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940879927] [2021-11-21 01:06:28,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940879927] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:06:28,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:06:28,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 17 [2021-11-21 01:06:28,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065175905] [2021-11-21 01:06:28,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:06:28,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 01:06:28,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:06:28,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 01:06:28,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-11-21 01:06:28,884 INFO L87 Difference]: Start difference. First operand 74 states and 95 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-21 01:06:29,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:06:29,334 INFO L93 Difference]: Finished difference Result 104 states and 131 transitions. [2021-11-21 01:06:29,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 01:06:29,335 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 63 [2021-11-21 01:06:29,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:06:29,335 INFO L225 Difference]: With dead ends: 104 [2021-11-21 01:06:29,335 INFO L226 Difference]: Without dead ends: 76 [2021-11-21 01:06:29,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:06:29,336 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 37 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:06:29,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 318 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 0 Unknown, 26 Unchecked, 0.3s Time] [2021-11-21 01:06:29,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-21 01:06:29,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2021-11-21 01:06:29,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 15 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (19), 17 states have call predecessors, (19), 15 states have call successors, (19) [2021-11-21 01:06:29,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2021-11-21 01:06:29,344 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 63 [2021-11-21 01:06:29,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:06:29,344 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2021-11-21 01:06:29,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-21 01:06:29,345 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2021-11-21 01:06:29,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-21 01:06:29,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:06:29,346 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1] [2021-11-21 01:06:29,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-21 01:06:29,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:06:29,559 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:06:29,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:06:29,559 INFO L85 PathProgramCache]: Analyzing trace with hash -589254976, now seen corresponding path program 1 times [2021-11-21 01:06:29,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:06:29,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1307039846] [2021-11-21 01:06:29,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:29,560 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:06:29,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:06:29,561 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:06:29,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-21 01:06:29,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:29,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 01:06:29,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-21 01:06:30,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:30,453 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-21 01:06:30,453 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:06:30,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1307039846] [2021-11-21 01:06:30,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1307039846] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:06:30,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [685347270] [2021-11-21 01:06:30,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:30,454 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:06:30,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:06:30,454 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:06:30,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-21 01:06:30,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:30,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 01:06:30,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:31,501 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-21 01:06:31,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-21 01:06:31,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [685347270] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:06:31,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891321557] [2021-11-21 01:06:31,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:31,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:06:31,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:06:31,769 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:06:31,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-21 01:06:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:31,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 01:06:31,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:32,428 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-21 01:06:32,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:32,722 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-21 01:06:32,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891321557] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:06:32,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:06:32,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 25 [2021-11-21 01:06:32,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978796011] [2021-11-21 01:06:32,723 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:06:32,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-21 01:06:32,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:06:32,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-21 01:06:32,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-11-21 01:06:32,725 INFO L87 Difference]: Start difference. First operand 74 states and 95 transitions. Second operand has 25 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 23 states have internal predecessors, (79), 10 states have call successors, (21), 1 states have call predecessors, (21), 4 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2021-11-21 01:06:33,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:06:33,947 INFO L93 Difference]: Finished difference Result 147 states and 187 transitions. [2021-11-21 01:06:33,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 01:06:33,947 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 23 states have internal predecessors, (79), 10 states have call successors, (21), 1 states have call predecessors, (21), 4 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) Word has length 63 [2021-11-21 01:06:33,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:06:33,949 INFO L225 Difference]: With dead ends: 147 [2021-11-21 01:06:33,949 INFO L226 Difference]: Without dead ends: 117 [2021-11-21 01:06:33,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 349 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 01:06:33,950 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 196 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:06:33,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 630 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-21 01:06:33,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-21 01:06:33,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 77. [2021-11-21 01:06:33,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 57 states have internal predecessors, (61), 16 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) [2021-11-21 01:06:33,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 100 transitions. [2021-11-21 01:06:33,959 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 100 transitions. Word has length 63 [2021-11-21 01:06:33,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:06:33,959 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 100 transitions. [2021-11-21 01:06:33,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 23 states have internal predecessors, (79), 10 states have call successors, (21), 1 states have call predecessors, (21), 4 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2021-11-21 01:06:33,960 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 100 transitions. [2021-11-21 01:06:33,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-21 01:06:33,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:06:33,961 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1] [2021-11-21 01:06:33,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-21 01:06:34,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-21 01:06:34,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-21 01:06:34,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:06:34,580 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:06:34,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:06:34,580 INFO L85 PathProgramCache]: Analyzing trace with hash -472199073, now seen corresponding path program 1 times [2021-11-21 01:06:34,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:06:34,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2082319753] [2021-11-21 01:06:34,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:34,581 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:06:34,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:06:34,582 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:06:34,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-21 01:06:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:34,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 01:06:34,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:34,965 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:06:34,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-21 01:06:36,242 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:06:36,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2082319753] [2021-11-21 01:06:36,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2082319753] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:06:36,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:06:36,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 17 [2021-11-21 01:06:36,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949974085] [2021-11-21 01:06:36,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:06:36,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 01:06:36,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:06:36,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 01:06:36,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-11-21 01:06:36,245 INFO L87 Difference]: Start difference. First operand 77 states and 100 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-21 01:06:36,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:06:36,757 INFO L93 Difference]: Finished difference Result 107 states and 137 transitions. [2021-11-21 01:06:36,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 01:06:36,760 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 64 [2021-11-21 01:06:36,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:06:36,761 INFO L225 Difference]: With dead ends: 107 [2021-11-21 01:06:36,761 INFO L226 Difference]: Without dead ends: 79 [2021-11-21 01:06:36,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:06:36,762 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 36 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:06:36,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 318 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 0 Unknown, 33 Unchecked, 0.4s Time] [2021-11-21 01:06:36,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-21 01:06:36,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2021-11-21 01:06:36,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 57 states have internal predecessors, (61), 16 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) [2021-11-21 01:06:36,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 100 transitions. [2021-11-21 01:06:36,772 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 100 transitions. Word has length 64 [2021-11-21 01:06:36,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:06:36,773 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 100 transitions. [2021-11-21 01:06:36,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-21 01:06:36,773 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 100 transitions. [2021-11-21 01:06:36,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-21 01:06:36,775 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:06:36,775 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1] [2021-11-21 01:06:36,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-21 01:06:36,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:06:36,988 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:06:36,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:06:36,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1283662981, now seen corresponding path program 1 times [2021-11-21 01:06:36,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:06:36,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [934149083] [2021-11-21 01:06:36,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:36,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:06:36,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:06:36,990 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:06:36,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-21 01:06:37,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:37,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 01:06:37,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:37,347 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:06:37,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:37,871 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-21 01:06:37,872 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:06:37,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [934149083] [2021-11-21 01:06:37,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [934149083] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:06:37,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:06:37,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 17 [2021-11-21 01:06:37,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128787152] [2021-11-21 01:06:37,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:06:37,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 01:06:37,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:06:37,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 01:06:37,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-11-21 01:06:37,874 INFO L87 Difference]: Start difference. First operand 77 states and 100 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-21 01:06:38,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:06:38,634 INFO L93 Difference]: Finished difference Result 105 states and 131 transitions. [2021-11-21 01:06:38,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 01:06:38,635 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 65 [2021-11-21 01:06:38,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:06:38,636 INFO L225 Difference]: With dead ends: 105 [2021-11-21 01:06:38,636 INFO L226 Difference]: Without dead ends: 77 [2021-11-21 01:06:38,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:06:38,637 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 35 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:06:38,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 318 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:06:38,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-21 01:06:38,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2021-11-21 01:06:38,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 55 states have internal predecessors, (60), 16 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (18), 17 states have call predecessors, (18), 16 states have call successors, (18) [2021-11-21 01:06:38,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2021-11-21 01:06:38,645 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 65 [2021-11-21 01:06:38,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:06:38,646 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2021-11-21 01:06:38,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-21 01:06:38,646 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2021-11-21 01:06:38,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-21 01:06:38,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:06:38,648 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1] [2021-11-21 01:06:38,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2021-11-21 01:06:38,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:06:38,862 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:06:38,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:06:38,862 INFO L85 PathProgramCache]: Analyzing trace with hash -322048964, now seen corresponding path program 1 times [2021-11-21 01:06:38,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:06:38,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [4445730] [2021-11-21 01:06:38,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:38,863 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:06:38,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:06:38,865 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:06:38,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-21 01:06:38,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:38,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:06:38,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 01:06:39,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:39,147 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-21 01:06:39,147 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:06:39,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [4445730] [2021-11-21 01:06:39,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [4445730] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:06:39,148 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:06:39,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-21 01:06:39,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632245088] [2021-11-21 01:06:39,148 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:06:39,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:06:39,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:06:39,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:06:39,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:06:39,149 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-21 01:06:39,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:06:39,160 INFO L93 Difference]: Finished difference Result 93 states and 114 transitions. [2021-11-21 01:06:39,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:06:39,160 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 65 [2021-11-21 01:06:39,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:06:39,161 INFO L225 Difference]: With dead ends: 93 [2021-11-21 01:06:39,161 INFO L226 Difference]: Without dead ends: 49 [2021-11-21 01:06:39,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:06:39,162 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 0 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 169 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 01:06:39,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 169 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:06:39,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-21 01:06:39,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-21 01:06:39,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 36 states have internal predecessors, (38), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-21 01:06:39,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2021-11-21 01:06:39,167 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 65 [2021-11-21 01:06:39,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:06:39,168 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2021-11-21 01:06:39,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-21 01:06:39,168 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2021-11-21 01:06:39,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-21 01:06:39,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:06:39,169 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:06:39,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-21 01:06:39,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:06:39,383 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:06:39,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:06:39,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1336082074, now seen corresponding path program 1 times [2021-11-21 01:06:39,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:06:39,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1061973851] [2021-11-21 01:06:39,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:39,387 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:06:39,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:06:39,387 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:06:39,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-21 01:06:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:39,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:06:39,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-21 01:06:39,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:39,981 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-21 01:06:39,982 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:06:39,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1061973851] [2021-11-21 01:06:39,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1061973851] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:06:39,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [298266799] [2021-11-21 01:06:39,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:39,982 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:06:39,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:06:39,983 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:06:39,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2021-11-21 01:06:40,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:40,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 01:06:40,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:41,053 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-21 01:06:41,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:41,582 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-21 01:06:41,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [298266799] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:06:41,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509105801] [2021-11-21 01:06:41,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:06:41,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:06:41,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:06:41,583 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:06:41,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-21 01:06:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:06:41,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-21 01:06:41,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:06:42,121 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 37 proven. 14 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-21 01:06:42,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:06:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-21 01:06:42,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509105801] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:06:42,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:06:42,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9, 9, 12, 9] total 33 [2021-11-21 01:06:42,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195120525] [2021-11-21 01:06:42,515 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:06:42,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-21 01:06:42,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:06:42,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-21 01:06:42,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 01:06:42,516 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 22 states have internal predecessors, (117), 8 states have call successors, (42), 2 states have call predecessors, (42), 6 states have return successors, (49), 19 states have call predecessors, (49), 8 states have call successors, (49) [2021-11-21 01:06:42,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:06:42,754 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-11-21 01:06:42,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 01:06:42,754 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 22 states have internal predecessors, (117), 8 states have call successors, (42), 2 states have call predecessors, (42), 6 states have return successors, (49), 19 states have call predecessors, (49), 8 states have call successors, (49) Word has length 74 [2021-11-21 01:06:42,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:06:42,755 INFO L225 Difference]: With dead ends: 53 [2021-11-21 01:06:42,755 INFO L226 Difference]: Without dead ends: 0 [2021-11-21 01:06:42,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2021-11-21 01:06:42,756 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:06:42,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 118 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:06:42,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-21 01:06:42,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-21 01:06:42,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 01:06:42,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-21 01:06:42,757 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 74 [2021-11-21 01:06:42,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:06:42,758 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-21 01:06:42,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 22 states have internal predecessors, (117), 8 states have call successors, (42), 2 states have call predecessors, (42), 6 states have return successors, (49), 19 states have call predecessors, (49), 8 states have call successors, (49) [2021-11-21 01:06:42,758 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-21 01:06:42,758 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-21 01:06:42,761 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-21 01:06:42,762 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-21 01:06:42,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-21 01:06:42,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2021-11-21 01:06:43,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-11-21 01:06:43,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:06:43,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-21 01:06:49,030 INFO L858 garLoopResultBuilder]: For program point isnan_floatFINAL(line 57) no Hoare annotation was computed. [2021-11-21 01:06:49,030 INFO L861 garLoopResultBuilder]: At program point isnan_floatENTRY(line 57) the Hoare annotation is: true [2021-11-21 01:06:49,030 INFO L858 garLoopResultBuilder]: For program point isnan_floatEXIT(line 57) no Hoare annotation was computed. [2021-11-21 01:06:49,031 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 82) no Hoare annotation was computed. [2021-11-21 01:06:49,031 INFO L854 garLoopResultBuilder]: At program point L81(line 81) the Hoare annotation is: (let ((.cse1 (fp.eq |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse0 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|))) (or (and (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|) (not .cse0) .cse1) (and (= |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~x~0#1|) (not .cse1) .cse0 (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|) (not (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|))))) [2021-11-21 01:06:49,031 INFO L858 garLoopResultBuilder]: For program point L81-1(line 81) no Hoare annotation was computed. [2021-11-21 01:06:49,031 INFO L858 garLoopResultBuilder]: For program point L81-2(line 81) no Hoare annotation was computed. [2021-11-21 01:06:49,031 INFO L854 garLoopResultBuilder]: At program point L81-3(line 81) the Hoare annotation is: (let ((.cse1 (fp.eq |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse0 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|))) (or (and (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|) (not .cse0) .cse1) (and (= |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~x~0#1|) (not .cse1) .cse0 (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|) (not (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|))))) [2021-11-21 01:06:49,031 INFO L858 garLoopResultBuilder]: For program point L81-4(line 81) no Hoare annotation was computed. [2021-11-21 01:06:49,032 INFO L858 garLoopResultBuilder]: For program point L81-6(lines 81 84) no Hoare annotation was computed. [2021-11-21 01:06:49,032 INFO L861 garLoopResultBuilder]: At program point L69(line 69) the Hoare annotation is: true [2021-11-21 01:06:49,032 INFO L858 garLoopResultBuilder]: For program point L69-1(line 69) no Hoare annotation was computed. [2021-11-21 01:06:49,032 INFO L858 garLoopResultBuilder]: For program point L69-2(line 69) no Hoare annotation was computed. [2021-11-21 01:06:49,032 INFO L854 garLoopResultBuilder]: At program point L69-3(line 69) the Hoare annotation is: (and (= |ULTIMATE.start_main_#t~ret10#1| (_ bv1 32)) |ULTIMATE.start_main_#t~short12#1| (not (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|))) [2021-11-21 01:06:49,032 INFO L858 garLoopResultBuilder]: For program point L69-4(line 69) no Hoare annotation was computed. [2021-11-21 01:06:49,033 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-21 01:06:49,033 INFO L858 garLoopResultBuilder]: For program point L69-6(line 69) no Hoare annotation was computed. [2021-11-21 01:06:49,033 INFO L858 garLoopResultBuilder]: For program point L69-7(lines 69 70) no Hoare annotation was computed. [2021-11-21 01:06:49,033 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-21 01:06:49,033 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-21 01:06:49,033 INFO L858 garLoopResultBuilder]: For program point L69-9(lines 69 85) no Hoare annotation was computed. [2021-11-21 01:06:49,033 INFO L858 garLoopResultBuilder]: For program point L69-11(lines 69 85) no Hoare annotation was computed. [2021-11-21 01:06:49,034 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 76) no Hoare annotation was computed. [2021-11-21 01:06:49,034 INFO L858 garLoopResultBuilder]: For program point L53(line 53) no Hoare annotation was computed. [2021-11-21 01:06:49,034 INFO L858 garLoopResultBuilder]: For program point L53-2(line 53) no Hoare annotation was computed. [2021-11-21 01:06:49,034 INFO L854 garLoopResultBuilder]: At program point L53-3(lines 45 54) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|)) (.cse1 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|))) (or (and (fp.eq |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~y~0#1|) (forall ((|ULTIMATE.start_fmax_float_~y#1| (_ FloatingPoint 8 24))) (not (fp.gt |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_fmax_float_~y#1|))) .cse0 (not .cse1)) (and (= |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~x~0#1|) .cse0 .cse1 (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|) (not (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|))))) [2021-11-21 01:06:49,034 INFO L858 garLoopResultBuilder]: For program point L82(line 82) no Hoare annotation was computed. [2021-11-21 01:06:49,035 INFO L854 garLoopResultBuilder]: At program point L70(line 70) the Hoare annotation is: (let ((.cse0 (not |ULTIMATE.start_main_#t~short12#1|)) (.cse1 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse2 (not |ULTIMATE.start_main_#t~short16#1|))) (or (and .cse0 (= |ULTIMATE.start_main_#t~ret10#1| (_ bv1 32)) (= |ULTIMATE.start_main_#t~ret11#1| (_ bv1 32)) (not (fp.eq |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (not .cse1) .cse2) (and .cse0 (= |ULTIMATE.start_main_#t~ret10#1| (_ bv0 32)) .cse1 .cse2))) [2021-11-21 01:06:49,035 INFO L858 garLoopResultBuilder]: For program point L70-1(line 70) no Hoare annotation was computed. [2021-11-21 01:06:49,035 INFO L858 garLoopResultBuilder]: For program point L70-2(line 70) no Hoare annotation was computed. [2021-11-21 01:06:49,035 INFO L854 garLoopResultBuilder]: At program point L70-3(line 70) the Hoare annotation is: (and (not |ULTIMATE.start_main_#t~short12#1|) |ULTIMATE.start_main_#t~short15#1| (= |ULTIMATE.start_main_#t~ret13#1| (_ bv0 32)) (= |ULTIMATE.start_main_#t~ret10#1| (_ bv0 32)) (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|) (not |ULTIMATE.start_main_#t~short16#1|)) [2021-11-21 01:06:49,035 INFO L858 garLoopResultBuilder]: For program point L70-4(line 70) no Hoare annotation was computed. [2021-11-21 01:06:49,035 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-21 01:06:49,036 INFO L858 garLoopResultBuilder]: For program point L70-6(line 70) no Hoare annotation was computed. [2021-11-21 01:06:49,036 INFO L861 garLoopResultBuilder]: At program point L87(lines 59 88) the Hoare annotation is: true [2021-11-21 01:06:49,036 INFO L854 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|)) (.cse2 (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|)) (.cse1 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse3 (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|))) (or (and .cse0 .cse1 .cse2 (not .cse3)) (and .cse0 .cse2 (not .cse1) .cse3))) [2021-11-21 01:06:49,036 INFO L858 garLoopResultBuilder]: For program point L50-1(lines 50 52) no Hoare annotation was computed. [2021-11-21 01:06:49,036 INFO L854 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|)) (.cse2 (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|)) (.cse1 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse3 (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|))) (or (and .cse0 .cse1 .cse2 (not .cse3)) (and .cse0 .cse2 (not .cse1) .cse3))) [2021-11-21 01:06:49,036 INFO L858 garLoopResultBuilder]: For program point L46-1(lines 46 48) no Hoare annotation was computed. [2021-11-21 01:06:49,037 INFO L854 garLoopResultBuilder]: At program point L75(line 75) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|)) (.cse1 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|))) (or (and (= |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~x~0#1|) .cse0 .cse1 (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|) (not (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|))) (and (fp.eq |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~y~0#1|) (fp.eq |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~y~0#1|) (forall ((|ULTIMATE.start_fmax_float_~y#1| (_ FloatingPoint 8 24))) (not (fp.gt |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_fmax_float_~y#1|))) .cse0 (not .cse1)))) [2021-11-21 01:06:49,037 INFO L858 garLoopResultBuilder]: For program point L75-1(line 75) no Hoare annotation was computed. [2021-11-21 01:06:49,037 INFO L858 garLoopResultBuilder]: For program point L75-2(line 75) no Hoare annotation was computed. [2021-11-21 01:06:49,037 INFO L854 garLoopResultBuilder]: At program point L75-3(line 75) the Hoare annotation is: (or (and (fp.eq |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_#t~short20#1| (fp.eq |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_#t~ret18#1| (_ bv1 32)) (not (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|))) (and (= |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_#t~short20#1| (or (= |ULTIMATE.start_main_~x~0#1| (fp (_ bv0 1) (_ bv0 8) (_ bv0 23))) (= (fp (_ bv1 1) (_ bv0 8) (_ bv0 23)) |ULTIMATE.start_main_~x~0#1|)) (= |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~x~0#1|) (not (fp.eq |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|) (not (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|)))) [2021-11-21 01:06:49,037 INFO L858 garLoopResultBuilder]: For program point L75-4(line 75) no Hoare annotation was computed. [2021-11-21 01:06:49,037 INFO L858 garLoopResultBuilder]: For program point L75-6(lines 75 78) no Hoare annotation was computed. [2021-11-21 01:06:49,038 INFO L858 garLoopResultBuilder]: For program point L76(line 76) no Hoare annotation was computed. [2021-11-21 01:06:49,038 INFO L858 garLoopResultBuilder]: For program point L33(lines 33 42) no Hoare annotation was computed. [2021-11-21 01:06:49,038 INFO L858 garLoopResultBuilder]: For program point __fpclassify_floatFINAL(lines 22 43) no Hoare annotation was computed. [2021-11-21 01:06:49,038 INFO L858 garLoopResultBuilder]: For program point L25-1(lines 25 29) no Hoare annotation was computed. [2021-11-21 01:06:49,038 INFO L854 garLoopResultBuilder]: At program point L25-2(lines 25 29) the Hoare annotation is: (= |__fpclassify_float_#in~x| __fpclassify_float_~x) [2021-11-21 01:06:49,038 INFO L858 garLoopResultBuilder]: For program point L25-3(lines 22 43) no Hoare annotation was computed. [2021-11-21 01:06:49,039 INFO L858 garLoopResultBuilder]: For program point L36(lines 36 42) no Hoare annotation was computed. [2021-11-21 01:06:49,039 INFO L861 garLoopResultBuilder]: At program point __fpclassify_floatENTRY(lines 22 43) the Hoare annotation is: true [2021-11-21 01:06:49,039 INFO L858 garLoopResultBuilder]: For program point __fpclassify_floatEXIT(lines 22 43) no Hoare annotation was computed. [2021-11-21 01:06:49,039 INFO L858 garLoopResultBuilder]: For program point L39(lines 39 42) no Hoare annotation was computed. [2021-11-21 01:06:49,042 INFO L732 BasicCegarLoop]: Path program histogram: [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 01:06:49,044 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 01:06:49,050 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_fmax_float_~y#1,QUANTIFIED] [2021-11-21 01:06:49,056 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_fmax_float_~y#1,QUANTIFIED] [2021-11-21 01:06:49,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 01:06:49 BoogieIcfgContainer [2021-11-21 01:06:49,058 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 01:06:49,059 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 01:06:49,059 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 01:06:49,059 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 01:06:49,059 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:05:34" (3/4) ... [2021-11-21 01:06:49,061 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-21 01:06:49,068 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure isnan_float [2021-11-21 01:06:49,068 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __fpclassify_float [2021-11-21 01:06:49,078 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2021-11-21 01:06:49,078 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-11-21 01:06:49,079 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-21 01:06:49,079 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-21 01:06:49,119 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: \old(x) == x [2021-11-21 01:06:49,122 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((~fp.eq~FLOAT(\result, y) && (forall ULTIMATE.start_fmax_float_~y#1 : C_FLOAT :: !~fp.gt~FLOAT(x, ULTIMATE.start_fmax_float_~y#1))) && y == y) && !~fp.eq~FLOAT(x, x)) || ((((\result == x && y == y) && ~fp.eq~FLOAT(x, x)) && x == x) && !~fp.eq~FLOAT(y, y)) [2021-11-21 01:06:49,163 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/bin/utaipan-TEXQjIfE4P/witness.graphml [2021-11-21 01:06:49,163 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 01:06:49,165 INFO L158 Benchmark]: Toolchain (without parser) took 75203.52ms. Allocated memory was 62.9MB in the beginning and 157.3MB in the end (delta: 94.4MB). Free memory was 43.3MB in the beginning and 106.3MB in the end (delta: -63.0MB). Peak memory consumption was 31.8MB. Max. memory is 16.1GB. [2021-11-21 01:06:49,165 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 62.9MB. Free memory is still 44.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:06:49,165 INFO L158 Benchmark]: CACSL2BoogieTranslator took 316.47ms. Allocated memory is still 62.9MB. Free memory was 43.2MB in the beginning and 44.7MB in the end (delta: -1.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-21 01:06:49,166 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.65ms. Allocated memory is still 62.9MB. Free memory was 44.5MB in the beginning and 42.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:06:49,167 INFO L158 Benchmark]: Boogie Preprocessor took 35.68ms. Allocated memory is still 62.9MB. Free memory was 42.9MB in the beginning and 41.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:06:49,170 INFO L158 Benchmark]: RCFGBuilder took 494.66ms. Allocated memory was 62.9MB in the beginning and 86.0MB in the end (delta: 23.1MB). Free memory was 41.4MB in the beginning and 68.5MB in the end (delta: -27.1MB). Peak memory consumption was 16.6MB. Max. memory is 16.1GB. [2021-11-21 01:06:49,172 INFO L158 Benchmark]: TraceAbstraction took 74199.58ms. Allocated memory was 86.0MB in the beginning and 157.3MB in the end (delta: 71.3MB). Free memory was 68.1MB in the beginning and 110.5MB in the end (delta: -42.4MB). Peak memory consumption was 98.3MB. Max. memory is 16.1GB. [2021-11-21 01:06:49,173 INFO L158 Benchmark]: Witness Printer took 104.87ms. Allocated memory is still 157.3MB. Free memory was 110.5MB in the beginning and 106.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-21 01:06:49,183 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 62.9MB. Free memory is still 44.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 316.47ms. Allocated memory is still 62.9MB. Free memory was 43.2MB in the beginning and 44.7MB in the end (delta: -1.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.65ms. Allocated memory is still 62.9MB. Free memory was 44.5MB in the beginning and 42.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.68ms. Allocated memory is still 62.9MB. Free memory was 42.9MB in the beginning and 41.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 494.66ms. Allocated memory was 62.9MB in the beginning and 86.0MB in the end (delta: 23.1MB). Free memory was 41.4MB in the beginning and 68.5MB in the end (delta: -27.1MB). Peak memory consumption was 16.6MB. Max. memory is 16.1GB. * TraceAbstraction took 74199.58ms. Allocated memory was 86.0MB in the beginning and 157.3MB in the end (delta: 71.3MB). Free memory was 68.1MB in the beginning and 110.5MB in the end (delta: -42.4MB). Peak memory consumption was 98.3MB. Max. memory is 16.1GB. * Witness Printer took 104.87ms. Allocated memory is still 157.3MB. Free memory was 110.5MB in the beginning and 106.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_fmax_float_~y#1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_fmax_float_~y#1,QUANTIFIED] * 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 - PositiveResult [Line: 76]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 82]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 55 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 74.1s, OverallIterations: 25, TraceHistogramMax: 8, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 15.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 5.7s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1521 SdHoareTripleChecker+Valid, 9.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1433 mSDsluCounter, 10452 SdHoareTripleChecker+Invalid, 8.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 403 IncrementalHoareTripleChecker+Unchecked, 8992 mSDsCounter, 475 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5258 IncrementalHoareTripleChecker+Invalid, 6136 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 475 mSolverCounterUnsat, 1460 mSDtfsCounter, 5258 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4745 GetRequests, 4224 SyntacticMatches, 13 SemanticMatches, 508 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2209 ImplicationChecksByTransitivity, 14.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=10, InterpolantAutomatonStates: 266, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 25 MinimizatonAttempts, 271 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 147 PreInvPairs, 181 NumberOfFragments, 311 HoareAnnotationTreeSize, 147 FomulaSimplifications, 8833 FormulaSimplificationTreeSizeReduction, 2.7s HoareSimplificationTime, 15 FomulaSimplificationsInter, 44290 FormulaSimplificationTreeSizeReductionInter, 3.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 3.6s SatisfiabilityAnalysisTime, 38.0s InterpolantComputationTime, 2346 NumberOfCodeBlocks, 2346 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 4602 ConstructedInterpolants, 85 QuantifiedInterpolants, 15006 SizeOfPredicates, 325 NumberOfNonLiveVariables, 5037 ConjunctsInSsa, 568 ConjunctsInUnsatCore, 90 InterpolantComputations, 27 PerfectInterpolantSequences, 2776/3156 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 - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 45]: Loop Invariant [2021-11-21 01:06:49,202 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_fmax_float_~y#1,QUANTIFIED] [2021-11-21 01:06:49,203 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_fmax_float_~y#1,QUANTIFIED] Derived loop invariant: (((~fp.eq~FLOAT(\result, y) && (forall ULTIMATE.start_fmax_float_~y#1 : C_FLOAT :: !~fp.gt~FLOAT(x, ULTIMATE.start_fmax_float_~y#1))) && y == y) && !~fp.eq~FLOAT(x, x)) || ((((\result == x && y == y) && ~fp.eq~FLOAT(x, x)) && x == x) && !~fp.eq~FLOAT(y, y)) - InvariantResult [Line: 59]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: \old(x) == x RESULT: Ultimate proved your program to be correct! [2021-11-21 01:06:49,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_533da59b-3717-46a4-9431-57f0dc0c496a/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 Writing output log to file Ultimate.log Result: TRUE