./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0ddb7cbdb5243e0dc5a18ffa5957d423189625fe9ffc6441855806502cce15ab --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:46:17,792 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:46:17,795 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:46:17,845 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:46:17,846 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:46:17,853 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:46:17,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:46:17,863 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:46:17,867 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:46:17,878 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:46:17,880 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:46:17,884 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:46:17,885 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:46:17,889 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:46:17,891 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:46:17,895 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:46:17,898 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:46:17,899 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:46:17,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:46:17,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:46:17,916 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:46:17,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:46:17,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:46:17,924 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:46:17,931 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:46:17,932 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:46:17,932 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:46:17,935 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:46:17,936 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:46:17,939 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:46:17,940 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:46:17,942 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:46:17,944 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:46:17,946 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:46:17,949 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:46:17,949 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:46:17,951 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:46:17,951 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:46:17,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:46:17,953 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:46:17,954 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:46:17,955 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:46:18,015 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:46:18,016 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:46:18,017 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:46:18,017 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:46:18,026 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:46:18,027 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:46:18,027 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:46:18,028 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:46:18,028 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:46:18,028 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:46:18,030 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:46:18,030 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:46:18,030 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:46:18,031 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:46:18,031 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:46:18,032 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:46:18,032 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:46:18,032 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:46:18,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:46:18,034 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:46:18,034 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:46:18,034 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:46:18,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:46:18,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:46:18,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:46:18,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:46:18,038 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:46:18,038 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:46:18,039 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:46:18,039 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:46:18,039 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:46:18,040 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:46:18,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:46:18,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:46:18,041 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:46:18,041 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:46:18,042 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:46:18,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:46:18,042 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:46:18,042 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:46:18,043 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:46:18,043 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_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ddb7cbdb5243e0dc5a18ffa5957d423189625fe9ffc6441855806502cce15ab [2021-11-23 02:46:18,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:46:18,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:46:18,461 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:46:18,462 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:46:18,463 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:46:18,465 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c [2021-11-23 02:46:18,564 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/data/57b18903f/472f53b17cc44c14998aafe9273c2c63/FLAGcd9e927a3 [2021-11-23 02:46:19,140 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:46:19,141 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/sv-benchmarks/c/float-newlib/double_req_bl_1251b.c [2021-11-23 02:46:19,149 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/data/57b18903f/472f53b17cc44c14998aafe9273c2c63/FLAGcd9e927a3 [2021-11-23 02:46:19,488 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/data/57b18903f/472f53b17cc44c14998aafe9273c2c63 [2021-11-23 02:46:19,492 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:46:19,494 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:46:19,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:46:19,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:46:19,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:46:19,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:46:19" (1/1) ... [2021-11-23 02:46:19,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4afd9911 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:19, skipping insertion in model container [2021-11-23 02:46:19,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:46:19" (1/1) ... [2021-11-23 02:46:19,514 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:46:19,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:46:19,790 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_abe8749f-2eff-4b58-bce8-730861e950ec/sv-benchmarks/c/float-newlib/double_req_bl_1251b.c[2080,2093] [2021-11-23 02:46:19,794 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:46:19,804 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:46:19,845 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_abe8749f-2eff-4b58-bce8-730861e950ec/sv-benchmarks/c/float-newlib/double_req_bl_1251b.c[2080,2093] [2021-11-23 02:46:19,846 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:46:19,863 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:46:19,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:19 WrapperNode [2021-11-23 02:46:19,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:46:19,864 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:46:19,865 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:46:19,865 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:46:19,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:19" (1/1) ... [2021-11-23 02:46:19,906 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:19" (1/1) ... [2021-11-23 02:46:19,931 INFO L137 Inliner]: procedures = 18, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 52 [2021-11-23 02:46:19,932 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:46:19,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:46:19,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:46:19,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:46:19,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:19" (1/1) ... [2021-11-23 02:46:19,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:19" (1/1) ... [2021-11-23 02:46:19,956 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:19" (1/1) ... [2021-11-23 02:46:19,957 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:19" (1/1) ... [2021-11-23 02:46:19,977 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:19" (1/1) ... [2021-11-23 02:46:19,992 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:19" (1/1) ... [2021-11-23 02:46:19,994 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:19" (1/1) ... [2021-11-23 02:46:19,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:46:20,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:46:20,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:46:20,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:46:20,011 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:19" (1/1) ... [2021-11-23 02:46:20,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:46:20,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:46:20,058 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:46:20,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:46:20,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:46:20,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:46:20,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:46:20,122 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_double [2021-11-23 02:46:20,123 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_double [2021-11-23 02:46:20,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-11-23 02:46:20,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:46:20,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:46:20,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:46:20,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:46:20,253 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:46:20,256 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:46:20,484 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:46:20,624 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:46:20,624 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 02:46:20,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:46:20 BoogieIcfgContainer [2021-11-23 02:46:20,628 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:46:20,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:46:20,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:46:20,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:46:20,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:46:19" (1/3) ... [2021-11-23 02:46:20,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@729de3fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:46:20, skipping insertion in model container [2021-11-23 02:46:20,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:19" (2/3) ... [2021-11-23 02:46:20,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@729de3fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:46:20, skipping insertion in model container [2021-11-23 02:46:20,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:46:20" (3/3) ... [2021-11-23 02:46:20,640 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1251b.c [2021-11-23 02:46:20,647 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:46:20,647 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:46:20,768 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:46:20,778 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:46:20,778 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:46:20,801 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:46:20,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 02:46:20,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:20,810 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:46:20,811 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:20,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:20,819 INFO L85 PathProgramCache]: Analyzing trace with hash -742833620, now seen corresponding path program 1 times [2021-11-23 02:46:20,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:20,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121232535] [2021-11-23 02:46:20,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:20,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:20,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:21,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:46:21,069 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:21,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121232535] [2021-11-23 02:46:21,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121232535] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:21,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:21,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:46:21,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866972674] [2021-11-23 02:46:21,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:21,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 02:46:21,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:21,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 02:46:21,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:46:21,124 INFO L87 Difference]: Start difference. First operand has 19 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:46:21,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:21,173 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2021-11-23 02:46:21,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 02:46:21,177 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-23 02:46:21,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:21,187 INFO L225 Difference]: With dead ends: 35 [2021-11-23 02:46:21,187 INFO L226 Difference]: Without dead ends: 16 [2021-11-23 02:46:21,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:46:21,197 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:21,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:46:21,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-23 02:46:21,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-23 02:46:21,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:46:21,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-11-23 02:46:21,251 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2021-11-23 02:46:21,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:21,252 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-11-23 02:46:21,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:46:21,253 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-11-23 02:46:21,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 02:46:21,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:21,255 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:46:21,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:46:21,256 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:21,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:21,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1492393827, now seen corresponding path program 1 times [2021-11-23 02:46:21,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:21,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016710508] [2021-11-23 02:46:21,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:21,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:46:21,348 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 02:46:21,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:46:21,445 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 02:46:21,449 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 02:46:21,453 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 02:46:21,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:46:21,469 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-11-23 02:46:21,473 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 02:46:21,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:46:21 BoogieIcfgContainer [2021-11-23 02:46:21,526 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 02:46:21,528 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 02:46:21,529 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 02:46:21,529 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 02:46:21,530 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:46:20" (3/4) ... [2021-11-23 02:46:21,534 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-23 02:46:21,534 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 02:46:21,536 INFO L158 Benchmark]: Toolchain (without parser) took 2041.66ms. Allocated memory was 94.4MB in the beginning and 125.8MB in the end (delta: 31.5MB). Free memory was 60.9MB in the beginning and 85.5MB in the end (delta: -24.6MB). Peak memory consumption was 8.1MB. Max. memory is 16.1GB. [2021-11-23 02:46:21,537 INFO L158 Benchmark]: CDTParser took 0.40ms. Allocated memory is still 94.4MB. Free memory was 48.8MB in the beginning and 48.7MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:46:21,543 INFO L158 Benchmark]: CACSL2BoogieTranslator took 367.72ms. Allocated memory is still 94.4MB. Free memory was 60.7MB in the beginning and 69.9MB in the end (delta: -9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 02:46:21,545 INFO L158 Benchmark]: Boogie Procedure Inliner took 67.93ms. Allocated memory is still 94.4MB. Free memory was 69.9MB in the beginning and 68.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:46:21,552 INFO L158 Benchmark]: Boogie Preprocessor took 70.05ms. Allocated memory is still 94.4MB. Free memory was 68.3MB in the beginning and 67.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:46:21,553 INFO L158 Benchmark]: RCFGBuilder took 623.74ms. Allocated memory is still 94.4MB. Free memory was 67.2MB in the beginning and 53.1MB in the end (delta: 14.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 02:46:21,554 INFO L158 Benchmark]: TraceAbstraction took 896.94ms. Allocated memory was 94.4MB in the beginning and 125.8MB in the end (delta: 31.5MB). Free memory was 52.5MB in the beginning and 86.1MB in the end (delta: -33.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:46:21,554 INFO L158 Benchmark]: Witness Printer took 6.07ms. Allocated memory is still 125.8MB. Free memory was 86.1MB in the beginning and 85.5MB in the end (delta: 595.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:46:21,558 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40ms. Allocated memory is still 94.4MB. Free memory was 48.8MB in the beginning and 48.7MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 367.72ms. Allocated memory is still 94.4MB. Free memory was 60.7MB in the beginning and 69.9MB in the end (delta: -9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 67.93ms. Allocated memory is still 94.4MB. Free memory was 69.9MB in the beginning and 68.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 70.05ms. Allocated memory is still 94.4MB. Free memory was 68.3MB in the beginning and 67.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 623.74ms. Allocated memory is still 94.4MB. Free memory was 67.2MB in the beginning and 53.1MB in the end (delta: 14.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 896.94ms. Allocated memory was 94.4MB in the beginning and 125.8MB in the end (delta: 31.5MB). Free memory was 52.5MB in the beginning and 86.1MB in the end (delta: -33.6MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 6.07ms. Allocated memory is still 125.8MB. Free memory was 86.1MB in the beginning and 85.5MB in the end (delta: 595.8kB). Peak memory consumption was 2.1MB. 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: 80]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 79, overapproximation of someBinaryArithmeticDOUBLEoperation at line 67. Possible FailurePath: [L66] double x = __VERIFIER_nondet_double(); [L67] double y = 0.0 / 0.0; [L74] CALL, EXPR isnan_double(x) [L18] return x != x; [L74] RET, EXPR isnan_double(x) [L74] COND TRUE !isnan_double(x) [L76] CALL, EXPR fmax_double(x, y) [L57] CALL, EXPR __fpclassify_double(x) VAL [\old(x)=2146435074] [L29] __uint32_t msw, lsw; VAL [\old(x)=2146435074, x=2146435074] [L32] ieee_double_shape_type ew_u; [L33] ew_u.value = (x) [L34] EXPR ew_u.parts.msw [L34] (msw) = ew_u.parts.msw [L35] EXPR ew_u.parts.lsw [L35] (lsw) = ew_u.parts.lsw [L38-L39] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L41-L42] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L44-L45] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L48-L49] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L52] return 0; [L57] RET, EXPR __fpclassify_double(x) VAL [\old(x)=2146435074, \old(y)=2146435075, __fpclassify_double(x)=0, x=2146435074, y=2146435075] [L57] COND TRUE __fpclassify_double(x) == 0 [L58] return y; VAL [\old(x)=2146435074, \old(y)=2146435075, \result=2146435075, x=2146435074, y=2146435075] [L76] RET, EXPR fmax_double(x, y) [L76] double res = fmax_double(x, y); [L79] COND TRUE res != x VAL [res=2146435075, x=2146435074, y=2146435075] [L80] reach_error() VAL [res=2146435075, x=2146435074, y=2146435075] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 17 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4 IncrementalHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 17 mSDtfsCounter, 4 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 25 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 11 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-23 02:46:21,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/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_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0ddb7cbdb5243e0dc5a18ffa5957d423189625fe9ffc6441855806502cce15ab --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:46:24,694 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:46:24,700 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:46:24,782 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:46:24,783 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:46:24,785 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:46:24,788 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:46:24,791 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:46:24,794 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:46:24,796 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:46:24,798 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:46:24,800 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:46:24,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:46:24,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:46:24,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:46:24,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:46:24,809 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:46:24,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:46:24,813 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:46:24,817 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:46:24,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:46:24,822 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:46:24,824 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:46:24,826 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:46:24,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:46:24,836 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:46:24,837 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:46:24,842 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:46:24,843 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:46:24,845 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:46:24,846 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:46:24,848 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:46:24,850 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:46:24,852 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:46:24,854 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:46:24,855 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:46:24,857 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:46:24,857 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:46:24,857 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:46:24,860 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:46:24,861 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:46:24,862 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 02:46:24,922 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:46:24,922 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:46:24,923 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:46:24,923 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:46:24,924 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:46:24,925 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:46:24,925 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:46:24,925 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:46:24,926 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:46:24,926 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:46:24,927 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:46:24,928 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:46:24,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:46:24,930 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:46:24,930 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:46:24,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:46:24,931 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:46:24,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:46:24,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:46:24,932 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 02:46:24,932 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 02:46:24,932 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 02:46:24,933 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:46:24,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:46:24,933 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:46:24,934 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:46:24,934 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:46:24,934 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 02:46:24,935 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:46:24,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:46:24,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:46:24,936 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:46:24,936 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:46:24,936 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 02:46:24,937 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 02:46:24,937 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:46:24,937 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:46:24,938 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:46:24,938 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_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ddb7cbdb5243e0dc5a18ffa5957d423189625fe9ffc6441855806502cce15ab [2021-11-23 02:46:25,473 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:46:25,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:46:25,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:46:25,510 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:46:25,511 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:46:25,513 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/float-newlib/double_req_bl_1251b.c [2021-11-23 02:46:25,602 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/data/24b02513f/53be470273a7468aaee4946899aa3290/FLAG3354bf589 [2021-11-23 02:46:26,326 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:46:26,327 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/sv-benchmarks/c/float-newlib/double_req_bl_1251b.c [2021-11-23 02:46:26,338 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/data/24b02513f/53be470273a7468aaee4946899aa3290/FLAG3354bf589 [2021-11-23 02:46:26,711 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/data/24b02513f/53be470273a7468aaee4946899aa3290 [2021-11-23 02:46:26,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:46:26,721 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:46:26,728 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:46:26,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:46:26,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:46:26,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:46:26" (1/1) ... [2021-11-23 02:46:26,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f7bcb47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:26, skipping insertion in model container [2021-11-23 02:46:26,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:46:26" (1/1) ... [2021-11-23 02:46:26,748 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:46:26,776 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:46:26,994 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_abe8749f-2eff-4b58-bce8-730861e950ec/sv-benchmarks/c/float-newlib/double_req_bl_1251b.c[2080,2093] [2021-11-23 02:46:26,998 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:46:27,014 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:46:27,109 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_abe8749f-2eff-4b58-bce8-730861e950ec/sv-benchmarks/c/float-newlib/double_req_bl_1251b.c[2080,2093] [2021-11-23 02:46:27,110 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:46:27,151 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:46:27,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:27 WrapperNode [2021-11-23 02:46:27,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:46:27,154 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:46:27,154 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:46:27,155 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:46:27,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:27" (1/1) ... [2021-11-23 02:46:27,175 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:27" (1/1) ... [2021-11-23 02:46:27,201 INFO L137 Inliner]: procedures = 21, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 50 [2021-11-23 02:46:27,202 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:46:27,203 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:46:27,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:46:27,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:46:27,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:27" (1/1) ... [2021-11-23 02:46:27,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:27" (1/1) ... [2021-11-23 02:46:27,226 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:27" (1/1) ... [2021-11-23 02:46:27,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:27" (1/1) ... [2021-11-23 02:46:27,237 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:27" (1/1) ... [2021-11-23 02:46:27,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:27" (1/1) ... [2021-11-23 02:46:27,245 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:27" (1/1) ... [2021-11-23 02:46:27,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:46:27,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:46:27,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:46:27,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:46:27,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:27" (1/1) ... [2021-11-23 02:46:27,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:46:27,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:46:27,293 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:46:27,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:46:27,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:46:27,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2021-11-23 02:46:27,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 02:46:27,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:46:27,371 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_double [2021-11-23 02:46:27,371 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_double [2021-11-23 02:46:27,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 02:46:27,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:46:27,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:46:27,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:46:27,468 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:46:27,470 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:46:27,691 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:46:27,699 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:46:27,699 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 02:46:27,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:46:27 BoogieIcfgContainer [2021-11-23 02:46:27,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:46:27,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:46:27,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:46:27,708 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:46:27,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:46:26" (1/3) ... [2021-11-23 02:46:27,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5183d9c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:46:27, skipping insertion in model container [2021-11-23 02:46:27,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:27" (2/3) ... [2021-11-23 02:46:27,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5183d9c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:46:27, skipping insertion in model container [2021-11-23 02:46:27,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:46:27" (3/3) ... [2021-11-23 02:46:27,739 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1251b.c [2021-11-23 02:46:27,746 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:46:27,747 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:46:27,835 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:46:27,861 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:46:27,862 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:46:27,885 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:46:27,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 02:46:27,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:27,894 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:46:27,895 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:27,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:27,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1684133472, now seen corresponding path program 1 times [2021-11-23 02:46:27,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:46:27,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2107635764] [2021-11-23 02:46:27,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:27,920 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:46:27,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:46:27,925 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:46:27,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 02:46:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:28,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 02:46:28,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:46:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:46:28,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:46:28,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:46:28,283 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:46:28,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2107635764] [2021-11-23 02:46:28,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2107635764] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:28,286 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:28,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-23 02:46:28,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897093651] [2021-11-23 02:46:28,291 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:28,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 02:46:28,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:46:28,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 02:46:28,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:46:28,352 INFO L87 Difference]: Start difference. First operand has 27 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:46:28,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:28,396 INFO L93 Difference]: Finished difference Result 49 states and 71 transitions. [2021-11-23 02:46:28,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 02:46:28,399 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-23 02:46:28,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:28,419 INFO L225 Difference]: With dead ends: 49 [2021-11-23 02:46:28,419 INFO L226 Difference]: Without dead ends: 23 [2021-11-23 02:46:28,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:46:28,430 INFO L933 BasicCegarLoop]: 35 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, 35 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 [2021-11-23 02:46:28,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:46:28,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-23 02:46:28,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-23 02:46:28,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:46:28,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2021-11-23 02:46:28,514 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 14 [2021-11-23 02:46:28,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:28,515 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2021-11-23 02:46:28,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:46:28,516 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2021-11-23 02:46:28,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 02:46:28,518 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:28,519 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:46:28,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:46:28,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:46:28,736 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:28,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:28,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1014515731, now seen corresponding path program 1 times [2021-11-23 02:46:28,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:46:28,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202409464] [2021-11-23 02:46:28,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:28,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:46:28,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:46:28,744 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:46:28,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 02:46:28,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:28,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:46:28,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:46:29,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:46:29,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:46:29,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:46:29,134 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:46:29,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202409464] [2021-11-23 02:46:29,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202409464] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:29,135 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:29,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-23 02:46:29,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731519691] [2021-11-23 02:46:29,136 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:29,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:46:29,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:46:29,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:46:29,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:46:29,140 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:46:29,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:29,238 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-11-23 02:46:29,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:46:29,240 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2021-11-23 02:46:29,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:29,244 INFO L225 Difference]: With dead ends: 33 [2021-11-23 02:46:29,249 INFO L226 Difference]: Without dead ends: 29 [2021-11-23 02:46:29,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:46:29,251 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:29,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:46:29,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-23 02:46:29,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2021-11-23 02:46:29,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:46:29,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2021-11-23 02:46:29,280 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 15 [2021-11-23 02:46:29,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:29,281 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2021-11-23 02:46:29,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:46:29,282 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2021-11-23 02:46:29,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 02:46:29,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:29,284 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:46:29,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:46:29,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:46:29,492 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:29,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:29,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1575197112, now seen corresponding path program 1 times [2021-11-23 02:46:29,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:46:29,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1802327183] [2021-11-23 02:46:29,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:29,495 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:46:29,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:46:29,503 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:46:29,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 02:46:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:29,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 02:46:29,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:46:30,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-11-23 02:46:32,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:46:32,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:46:34,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 71 [2021-11-23 02:46:35,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 71 [2021-11-23 02:46:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:46:36,750 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:46:36,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1802327183] [2021-11-23 02:46:36,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1802327183] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:36,750 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:36,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 17 [2021-11-23 02:46:36,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331518940] [2021-11-23 02:46:36,751 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:36,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 02:46:36,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:46:36,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 02:46:36,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:46:36,754 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:46:37,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:37,236 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2021-11-23 02:46:37,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 02:46:37,237 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-11-23 02:46:37,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:37,238 INFO L225 Difference]: With dead ends: 45 [2021-11-23 02:46:37,238 INFO L226 Difference]: Without dead ends: 25 [2021-11-23 02:46:37,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:46:37,240 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:37,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 86 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 51 Invalid, 0 Unknown, 17 Unchecked, 0.2s Time] [2021-11-23 02:46:37,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-23 02:46:37,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-23 02:46:37,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:46:37,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-11-23 02:46:37,247 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 18 [2021-11-23 02:46:37,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:37,248 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-11-23 02:46:37,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:46:37,248 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-11-23 02:46:37,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 02:46:37,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:37,250 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:46:37,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:46:37,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:46:37,467 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:37,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:37,468 INFO L85 PathProgramCache]: Analyzing trace with hash 789982401, now seen corresponding path program 1 times [2021-11-23 02:46:37,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:46:37,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1496442805] [2021-11-23 02:46:37,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:37,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:46:37,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:46:37,471 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:46:37,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 02:46:37,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:37,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:46:37,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:46:37,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:46:37,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:46:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:46:37,820 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:46:37,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1496442805] [2021-11-23 02:46:37,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1496442805] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:37,821 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:37,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-23 02:46:37,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751952185] [2021-11-23 02:46:37,822 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:37,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:46:37,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:46:37,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:46:37,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:46:37,824 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:46:37,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:37,862 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2021-11-23 02:46:37,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:46:37,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-11-23 02:46:37,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:37,864 INFO L225 Difference]: With dead ends: 33 [2021-11-23 02:46:37,864 INFO L226 Difference]: Without dead ends: 29 [2021-11-23 02:46:37,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:46:37,866 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:37,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:46:37,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-23 02:46:37,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2021-11-23 02:46:37,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:46:37,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-11-23 02:46:37,880 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 23 [2021-11-23 02:46:37,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:37,880 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-11-23 02:46:37,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:46:37,881 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-11-23 02:46:37,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 02:46:37,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:37,882 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:46:37,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:46:38,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:46:38,092 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:38,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:38,093 INFO L85 PathProgramCache]: Analyzing trace with hash -984557701, now seen corresponding path program 1 times [2021-11-23 02:46:38,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:46:38,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [964045132] [2021-11-23 02:46:38,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:38,094 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:46:38,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:46:38,096 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:46:38,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 02:46:38,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:38,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:46:38,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:46:38,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:46:38,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:46:39,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:46:39,047 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:46:39,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [964045132] [2021-11-23 02:46:39,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [964045132] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:39,047 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:39,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-23 02:46:39,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148333639] [2021-11-23 02:46:39,048 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:39,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:46:39,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:46:39,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:46:39,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:46:39,050 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:46:39,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:39,056 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-11-23 02:46:39,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:46:39,056 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2021-11-23 02:46:39,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:39,057 INFO L225 Difference]: With dead ends: 35 [2021-11-23 02:46:39,058 INFO L226 Difference]: Without dead ends: 30 [2021-11-23 02:46:39,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:46:39,060 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:39,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 98 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 2 Unchecked, 0.0s Time] [2021-11-23 02:46:39,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-23 02:46:39,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2021-11-23 02:46:39,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:46:39,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-11-23 02:46:39,070 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 25 [2021-11-23 02:46:39,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:39,070 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-11-23 02:46:39,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:46:39,071 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-11-23 02:46:39,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 02:46:39,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:39,073 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:46:39,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:46:39,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:46:39,290 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:39,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:39,291 INFO L85 PathProgramCache]: Analyzing trace with hash -982710659, now seen corresponding path program 1 times [2021-11-23 02:46:39,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:46:39,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [17007341] [2021-11-23 02:46:39,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:39,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:46:39,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:46:39,294 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:46:39,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 02:46:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:39,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:46:39,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:46:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:46:39,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:46:42,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:46:42,534 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:46:42,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [17007341] [2021-11-23 02:46:42,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [17007341] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:42,535 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:42,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-23 02:46:42,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286953849] [2021-11-23 02:46:42,535 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:42,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 02:46:42,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:46:42,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 02:46:42,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:46:42,537 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:46:42,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:42,584 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-11-23 02:46:42,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:46:42,585 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2021-11-23 02:46:42,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:42,587 INFO L225 Difference]: With dead ends: 35 [2021-11-23 02:46:42,587 INFO L226 Difference]: Without dead ends: 28 [2021-11-23 02:46:42,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:46:42,589 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:42,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 120 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 20 Unchecked, 0.0s Time] [2021-11-23 02:46:42,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-23 02:46:42,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-23 02:46:42,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:46:42,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-11-23 02:46:42,597 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 25 [2021-11-23 02:46:42,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:42,597 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-11-23 02:46:42,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:46:42,598 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-11-23 02:46:42,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 02:46:42,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:42,599 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:46:42,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:46:42,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:46:42,800 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:42,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:42,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1961064157, now seen corresponding path program 1 times [2021-11-23 02:46:42,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:46:42,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1516793791] [2021-11-23 02:46:42,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:42,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:46:42,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:46:42,803 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:46:42,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 02:46:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:42,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:46:42,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:46:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:46:43,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:46:44,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:46:44,882 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:46:44,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1516793791] [2021-11-23 02:46:44,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1516793791] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:44,886 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:44,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-23 02:46:44,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837098070] [2021-11-23 02:46:44,887 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:44,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 02:46:44,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:46:44,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 02:46:44,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:46:44,891 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:46:44,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:44,947 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-11-23 02:46:44,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:46:44,949 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2021-11-23 02:46:44,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:44,952 INFO L225 Difference]: With dead ends: 37 [2021-11-23 02:46:44,954 INFO L226 Difference]: Without dead ends: 30 [2021-11-23 02:46:44,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:46:44,956 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 4 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:44,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 130 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 32 Unchecked, 0.0s Time] [2021-11-23 02:46:44,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-23 02:46:44,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-11-23 02:46:44,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:46:44,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-11-23 02:46:44,973 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 26 [2021-11-23 02:46:44,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:44,979 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-11-23 02:46:44,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:46:44,980 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-11-23 02:46:44,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 02:46:44,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:44,982 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:46:45,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:46:45,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:46:45,199 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:45,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:45,200 INFO L85 PathProgramCache]: Analyzing trace with hash 199294188, now seen corresponding path program 1 times [2021-11-23 02:46:45,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:46:45,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [955849719] [2021-11-23 02:46:45,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:45,201 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:46:45,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:46:45,205 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:46:45,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 02:46:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:45,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 02:46:45,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:46:47,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:46:47,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:46:48,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:46:48,246 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:46:48,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [955849719] [2021-11-23 02:46:48,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [955849719] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:46:48,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1535813372] [2021-11-23 02:46:48,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:48,247 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:46:48,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:46:48,253 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:46:48,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 02:46:48,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:48,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 02:46:48,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:46:49,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:46:49,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:46:49,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:46:49,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1535813372] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:49,677 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:46:49,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [9, 9] total 22 [2021-11-23 02:46:49,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198449332] [2021-11-23 02:46:49,677 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:49,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 02:46:49,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:46:49,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 02:46:49,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-11-23 02:46:49,679 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:46:50,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:50,220 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-11-23 02:46:50,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:46:50,221 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2021-11-23 02:46:50,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:50,222 INFO L225 Difference]: With dead ends: 32 [2021-11-23 02:46:50,223 INFO L226 Difference]: Without dead ends: 28 [2021-11-23 02:46:50,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-11-23 02:46:50,225 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 27 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:50,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 162 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:46:50,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-23 02:46:50,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-11-23 02:46:50,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:46:50,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-11-23 02:46:50,233 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 26 [2021-11-23 02:46:50,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:50,234 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-11-23 02:46:50,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:46:50,234 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-11-23 02:46:50,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 02:46:50,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:50,236 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:46:50,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2021-11-23 02:46:50,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:46:50,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:46:50,639 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:50,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:50,640 INFO L85 PathProgramCache]: Analyzing trace with hash -865134783, now seen corresponding path program 1 times [2021-11-23 02:46:50,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:46:50,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1491782844] [2021-11-23 02:46:50,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:50,641 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:46:50,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:46:50,643 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:46:50,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 02:46:50,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:50,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:46:50,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:46:51,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:46:51,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:46:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:46:52,491 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:46:52,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1491782844] [2021-11-23 02:46:52,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1491782844] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:52,491 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:52,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-23 02:46:52,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713413663] [2021-11-23 02:46:52,492 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:52,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 02:46:52,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:46:52,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 02:46:52,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:46:52,493 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:46:52,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:52,559 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-11-23 02:46:52,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:46:52,560 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-11-23 02:46:52,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:52,562 INFO L225 Difference]: With dead ends: 36 [2021-11-23 02:46:52,565 INFO L226 Difference]: Without dead ends: 29 [2021-11-23 02:46:52,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:46:52,567 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:52,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 103 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 21 Unchecked, 0.0s Time] [2021-11-23 02:46:52,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-23 02:46:52,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-11-23 02:46:52,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:46:52,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-11-23 02:46:52,583 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 27 [2021-11-23 02:46:52,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:52,583 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-11-23 02:46:52,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:46:52,584 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-11-23 02:46:52,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 02:46:52,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:52,586 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:46:52,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:46:52,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:46:52,803 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:52,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:52,803 INFO L85 PathProgramCache]: Analyzing trace with hash 109054183, now seen corresponding path program 1 times [2021-11-23 02:46:52,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:46:52,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [609683138] [2021-11-23 02:46:52,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:52,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:46:52,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:46:52,805 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:46:52,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 02:46:52,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:52,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 02:46:52,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:46:53,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-11-23 02:46:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:46:53,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:46:53,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2021-11-23 02:46:54,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2021-11-23 02:46:54,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:46:54,908 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:46:54,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [609683138] [2021-11-23 02:46:54,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [609683138] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:54,908 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:54,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-23 02:46:54,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893616330] [2021-11-23 02:46:54,909 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:54,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 02:46:54,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:46:54,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 02:46:54,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:46:54,910 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:46:54,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:54,962 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-11-23 02:46:54,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:46:54,962 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-11-23 02:46:54,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:54,963 INFO L225 Difference]: With dead ends: 34 [2021-11-23 02:46:54,963 INFO L226 Difference]: Without dead ends: 27 [2021-11-23 02:46:54,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:46:54,964 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:54,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 100 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 21 Unchecked, 0.0s Time] [2021-11-23 02:46:54,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-23 02:46:54,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-11-23 02:46:54,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:46:54,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-11-23 02:46:54,981 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 28 [2021-11-23 02:46:54,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:54,982 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-11-23 02:46:54,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:46:54,983 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-11-23 02:46:54,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 02:46:54,987 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:54,988 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:46:55,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 02:46:55,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:46:55,189 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:55,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:55,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1698400280, now seen corresponding path program 1 times [2021-11-23 02:46:55,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:46:55,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130905283] [2021-11-23 02:46:55,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:55,190 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:46:55,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:46:55,191 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:46:55,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 02:46:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:55,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:46:55,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:46:55,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:46:55,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:46:55,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:46:55,426 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:46:55,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130905283] [2021-11-23 02:46:55,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130905283] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:55,427 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:55,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-23 02:46:55,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79023993] [2021-11-23 02:46:55,427 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:55,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:46:55,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:46:55,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:46:55,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:46:55,429 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:46:55,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:55,494 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-11-23 02:46:55,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:46:55,495 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-11-23 02:46:55,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:55,495 INFO L225 Difference]: With dead ends: 25 [2021-11-23 02:46:55,495 INFO L226 Difference]: Without dead ends: 0 [2021-11-23 02:46:55,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:46:55,497 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:55,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:46:55,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-23 02:46:55,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-23 02:46:55,498 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) [2021-11-23 02:46:55,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-23 02:46:55,499 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-11-23 02:46:55,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:55,499 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-23 02:46:55,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:46:55,499 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-23 02:46:55,499 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-23 02:46:55,502 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 02:46:55,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 02:46:55,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:46:55,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-23 02:46:56,068 INFO L858 garLoopResultBuilder]: For program point L31-1(lines 31 36) no Hoare annotation was computed. [2021-11-23 02:46:56,068 INFO L854 garLoopResultBuilder]: At program point L31-2(lines 31 36) the Hoare annotation is: (= |__fpclassify_double_#in~x| __fpclassify_double_~x) [2021-11-23 02:46:56,069 INFO L858 garLoopResultBuilder]: For program point L31-3(lines 28 53) no Hoare annotation was computed. [2021-11-23 02:46:56,069 INFO L858 garLoopResultBuilder]: For program point __fpclassify_doubleFINAL(lines 28 53) no Hoare annotation was computed. [2021-11-23 02:46:56,069 INFO L858 garLoopResultBuilder]: For program point L48(lines 48 52) no Hoare annotation was computed. [2021-11-23 02:46:56,069 INFO L858 garLoopResultBuilder]: For program point L44(lines 44 52) no Hoare annotation was computed. [2021-11-23 02:46:56,069 INFO L861 garLoopResultBuilder]: At program point __fpclassify_doubleENTRY(lines 28 53) the Hoare annotation is: true [2021-11-23 02:46:56,069 INFO L858 garLoopResultBuilder]: For program point __fpclassify_doubleEXIT(lines 28 53) no Hoare annotation was computed. [2021-11-23 02:46:56,069 INFO L858 garLoopResultBuilder]: For program point L41(lines 41 52) no Hoare annotation was computed. [2021-11-23 02:46:56,069 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-23 02:46:56,070 INFO L858 garLoopResultBuilder]: For program point L62(line 62) no Hoare annotation was computed. [2021-11-23 02:46:56,070 INFO L858 garLoopResultBuilder]: For program point L62-2(line 62) no Hoare annotation was computed. [2021-11-23 02:46:56,070 INFO L854 garLoopResultBuilder]: At program point L62-3(lines 55 63) the Hoare annotation is: (and (= (_ bv0 32) |ULTIMATE.start_isnan_double_#res#1|) (= |ULTIMATE.start_fmax_double_~x#1| |ULTIMATE.start_main_~x~0#1|) (fp.eq |ULTIMATE.start_fmax_double_~x#1| |ULTIMATE.start_fmax_double_~x#1|) (= |ULTIMATE.start_fmax_double_#res#1| |ULTIMATE.start_main_~x~0#1|)) [2021-11-23 02:46:56,070 INFO L861 garLoopResultBuilder]: At program point L85(lines 65 86) the Hoare annotation is: true [2021-11-23 02:46:56,070 INFO L858 garLoopResultBuilder]: For program point L79(lines 79 82) no Hoare annotation was computed. [2021-11-23 02:46:56,070 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-23 02:46:56,070 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-23 02:46:56,070 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-23 02:46:56,070 INFO L854 garLoopResultBuilder]: At program point L59(line 59) the Hoare annotation is: (and (= (_ bv0 32) |ULTIMATE.start_isnan_double_#res#1|) (exists ((currentRoundingMode RoundingMode)) (= (fp.div currentRoundingMode (_ +zero 11 53) (_ +zero 11 53)) |ULTIMATE.start_fmax_double_~y#1|)) (= |ULTIMATE.start_fmax_double_~x#1| |ULTIMATE.start_main_~x~0#1|) (fp.eq |ULTIMATE.start_fmax_double_~x#1| |ULTIMATE.start_fmax_double_~x#1|)) [2021-11-23 02:46:56,071 INFO L858 garLoopResultBuilder]: For program point L59-1(lines 59 60) no Hoare annotation was computed. [2021-11-23 02:46:56,071 INFO L854 garLoopResultBuilder]: At program point L57(line 57) the Hoare annotation is: (and (= (_ bv0 32) |ULTIMATE.start_isnan_double_#res#1|) (exists ((currentRoundingMode RoundingMode)) (= (fp.div currentRoundingMode (_ +zero 11 53) (_ +zero 11 53)) |ULTIMATE.start_fmax_double_~y#1|)) (= |ULTIMATE.start_fmax_double_~x#1| |ULTIMATE.start_main_~x~0#1|) (fp.eq |ULTIMATE.start_fmax_double_~x#1| |ULTIMATE.start_fmax_double_~x#1|)) [2021-11-23 02:46:56,071 INFO L858 garLoopResultBuilder]: For program point L57-1(lines 57 58) no Hoare annotation was computed. [2021-11-23 02:46:56,071 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 80) no Hoare annotation was computed. [2021-11-23 02:46:56,071 INFO L854 garLoopResultBuilder]: At program point L18(line 18) the Hoare annotation is: (and (exists ((currentRoundingMode RoundingMode)) (= (fp.div currentRoundingMode (_ +zero 11 53) (_ +zero 11 53)) |ULTIMATE.start_main_~y~0#1|)) (let ((.cse0 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|))) (or (and (= (_ bv0 32) |ULTIMATE.start_isnan_double_#res#1|) .cse0) (and (= (_ bv1 32) |ULTIMATE.start_isnan_double_#res#1|) (not .cse0))))) [2021-11-23 02:46:56,072 INFO L858 garLoopResultBuilder]: For program point L80(line 80) no Hoare annotation was computed. [2021-11-23 02:46:56,072 INFO L858 garLoopResultBuilder]: For program point L74(lines 74 83) no Hoare annotation was computed. [2021-11-23 02:46:56,072 INFO L858 garLoopResultBuilder]: For program point L74-2(lines 74 83) no Hoare annotation was computed. [2021-11-23 02:46:56,076 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:46:56,078 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 02:46:56,084 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2021-11-23 02:46:56,103 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2021-11-23 02:46:56,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:46:56 BoogieIcfgContainer [2021-11-23 02:46:56,107 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 02:46:56,107 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 02:46:56,107 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 02:46:56,108 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 02:46:56,108 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:46:27" (3/4) ... [2021-11-23 02:46:56,112 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-23 02:46:56,120 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __fpclassify_double [2021-11-23 02:46:56,126 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2021-11-23 02:46:56,126 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-11-23 02:46:56,126 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-23 02:46:56,127 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-23 02:46:56,153 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (\exists currentRoundingMode : FloatRoundingMode :: ~fp.div~DOUBLE(currentRoundingMode, ~Pluszero~LONGDOUBLE(), ~Pluszero~LONGDOUBLE()) == y) && ((0bv32 == \result && ~fp.eq~DOUBLE(x, x)) || (1bv32 == \result && !~fp.eq~DOUBLE(x, x))) [2021-11-23 02:46:56,154 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: \old(x) == x [2021-11-23 02:46:56,154 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((0bv32 == \result && x == x) && ~fp.eq~DOUBLE(x, x)) && \result == x [2021-11-23 02:46:56,175 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 02:46:56,179 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 02:46:56,180 INFO L158 Benchmark]: Toolchain (without parser) took 29459.42ms. Allocated memory was 58.7MB in the beginning and 96.5MB in the end (delta: 37.7MB). Free memory was 36.3MB in the beginning and 40.3MB in the end (delta: -4.0MB). Peak memory consumption was 33.8MB. Max. memory is 16.1GB. [2021-11-23 02:46:56,181 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 58.7MB. Free memory is still 39.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:46:56,181 INFO L158 Benchmark]: CACSL2BoogieTranslator took 424.67ms. Allocated memory is still 58.7MB. Free memory was 36.1MB in the beginning and 40.5MB in the end (delta: -4.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 02:46:56,182 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.66ms. Allocated memory is still 58.7MB. Free memory was 40.5MB in the beginning and 38.8MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:46:56,182 INFO L158 Benchmark]: Boogie Preprocessor took 47.74ms. Allocated memory is still 58.7MB. Free memory was 38.8MB in the beginning and 37.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:46:56,183 INFO L158 Benchmark]: RCFGBuilder took 450.52ms. Allocated memory is still 58.7MB. Free memory was 37.4MB in the beginning and 26.3MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 02:46:56,184 INFO L158 Benchmark]: TraceAbstraction took 28402.76ms. Allocated memory was 58.7MB in the beginning and 96.5MB in the end (delta: 37.7MB). Free memory was 25.9MB in the beginning and 43.5MB in the end (delta: -17.7MB). Peak memory consumption was 22.1MB. Max. memory is 16.1GB. [2021-11-23 02:46:56,185 INFO L158 Benchmark]: Witness Printer took 72.42ms. Allocated memory is still 96.5MB. Free memory was 43.5MB in the beginning and 40.3MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 02:46:56,187 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 58.7MB. Free memory is still 39.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 424.67ms. Allocated memory is still 58.7MB. Free memory was 36.1MB in the beginning and 40.5MB in the end (delta: -4.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.66ms. Allocated memory is still 58.7MB. Free memory was 40.5MB in the beginning and 38.8MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 47.74ms. Allocated memory is still 58.7MB. Free memory was 38.8MB in the beginning and 37.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 450.52ms. Allocated memory is still 58.7MB. Free memory was 37.4MB in the beginning and 26.3MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 28402.76ms. Allocated memory was 58.7MB in the beginning and 96.5MB in the end (delta: 37.7MB). Free memory was 25.9MB in the beginning and 43.5MB in the end (delta: -17.7MB). Peak memory consumption was 22.1MB. Max. memory is 16.1GB. * Witness Printer took 72.42ms. Allocated memory is still 96.5MB. Free memory was 43.5MB in the beginning and 40.3MB in the end (delta: 3.2MB). 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[currentRoundingMode,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,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: 80]: 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 2 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 28.2s, OverallIterations: 11, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 98 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 97 mSDsluCounter, 1099 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 113 IncrementalHoareTripleChecker+Unchecked, 835 mSDsCounter, 26 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 138 IncrementalHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 26 mSolverCounterUnsat, 264 mSDtfsCounter, 138 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 551 GetRequests, 442 SyntacticMatches, 13 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 5.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=6, InterpolantAutomatonStates: 71, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 17 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 13 PreInvPairs, 18 NumberOfFragments, 76 HoareAnnotationTreeSize, 13 FomulaSimplifications, 16 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 102 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 21.5s InterpolantComputationTime, 281 NumberOfCodeBlocks, 281 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 538 ConstructedInterpolants, 125 QuantifiedInterpolants, 3804 SizeOfPredicates, 73 NumberOfNonLiveVariables, 874 ConjunctsInSsa, 91 ConjunctsInUnsatCore, 24 InterpolantComputations, 22 PerfectInterpolantSequences, 98/108 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 1 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant [2021-11-23 02:46:56,198 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2021-11-23 02:46:56,200 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] Derived loop invariant: (\exists currentRoundingMode : FloatRoundingMode :: ~fp.div~DOUBLE(currentRoundingMode, ~Pluszero~LONGDOUBLE(), ~Pluszero~LONGDOUBLE()) == y) && ((0bv32 == \result && ~fp.eq~DOUBLE(x, x)) || (1bv32 == \result && !~fp.eq~DOUBLE(x, x))) - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: \old(x) == x - InvariantResult [Line: 65]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 55]: Loop Invariant Derived loop invariant: ((0bv32 == \result && x == x) && ~fp.eq~DOUBLE(x, x)) && \result == x RESULT: Ultimate proved your program to be correct! [2021-11-23 02:46:56,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe8749f-2eff-4b58-bce8-730861e950ec/bin/utaipan-EQgc7hIp5V/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