./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_4+newton_2_6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_2_6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS --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 5cac0172a473af199376bf812088f190c7f0980d081815e0ce11da019a58906a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 06:53:32,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:53:32,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:53:32,996 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:53:32,997 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:53:32,998 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:53:33,000 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:53:33,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:53:33,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:53:33,005 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:53:33,006 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:53:33,007 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:53:33,008 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:53:33,009 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:53:33,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:53:33,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:53:33,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:53:33,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:53:33,015 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:53:33,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:53:33,019 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:53:33,030 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:53:33,031 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:53:33,035 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:53:33,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:53:33,045 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:53:33,046 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:53:33,047 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:53:33,048 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:53:33,049 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:53:33,050 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:53:33,051 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:53:33,053 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:53:33,055 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:53:33,057 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:53:33,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:53:33,059 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:53:33,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:53:33,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:53:33,060 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:53:33,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:53:33,062 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:53:33,105 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:53:33,105 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:53:33,106 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:53:33,106 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:53:33,107 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:53:33,108 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:53:33,108 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:53:33,108 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:53:33,108 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:53:33,108 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:53:33,110 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:53:33,110 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:53:33,110 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:53:33,110 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:53:33,110 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:53:33,111 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:53:33,111 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:53:33,111 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:53:33,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:53:33,112 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:53:33,112 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:53:33,113 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:53:33,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:53:33,113 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:53:33,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:53:33,113 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:53:33,114 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:53:33,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:53:33,114 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:53:33,114 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:53:33,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:53:33,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:53:33,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:53:33,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:53:33,116 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:53:33,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:53:33,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:53:33,116 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:53:33,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:53:33,117 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:53:33,117 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:53:33,117 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5cac0172a473af199376bf812088f190c7f0980d081815e0ce11da019a58906a [2022-11-19 06:53:33,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:53:33,499 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:53:33,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:53:33,503 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:53:33,504 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:53:33,515 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/gcd_4+newton_2_6.i [2022-11-19 06:53:33,587 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/data/0d71e5558/4bff2cb4601b4b86a192efdf513138ef/FLAGf88db5418 [2022-11-19 06:53:34,101 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:53:34,104 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/sv-benchmarks/c/combinations/gcd_4+newton_2_6.i [2022-11-19 06:53:34,114 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/data/0d71e5558/4bff2cb4601b4b86a192efdf513138ef/FLAGf88db5418 [2022-11-19 06:53:34,458 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/data/0d71e5558/4bff2cb4601b4b86a192efdf513138ef [2022-11-19 06:53:34,461 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:53:34,462 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:53:34,464 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:53:34,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:53:34,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:53:34,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:53:34" (1/1) ... [2022-11-19 06:53:34,471 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29ff78cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:34, skipping insertion in model container [2022-11-19 06:53:34,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:53:34" (1/1) ... [2022-11-19 06:53:34,480 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:53:34,498 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:53:34,712 WARN L234 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_1c982a52-67af-430c-a75b-9639fe86f3bc/sv-benchmarks/c/combinations/gcd_4+newton_2_6.i[1224,1237] [2022-11-19 06:53:34,766 WARN L234 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_1c982a52-67af-430c-a75b-9639fe86f3bc/sv-benchmarks/c/combinations/gcd_4+newton_2_6.i[2827,2840] [2022-11-19 06:53:34,768 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:53:34,778 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:53:34,800 WARN L234 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_1c982a52-67af-430c-a75b-9639fe86f3bc/sv-benchmarks/c/combinations/gcd_4+newton_2_6.i[1224,1237] [2022-11-19 06:53:34,825 WARN L234 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_1c982a52-67af-430c-a75b-9639fe86f3bc/sv-benchmarks/c/combinations/gcd_4+newton_2_6.i[2827,2840] [2022-11-19 06:53:34,828 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:53:34,843 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:53:34,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:34 WrapperNode [2022-11-19 06:53:34,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:53:34,846 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:53:34,846 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:53:34,846 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:53:34,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:34" (1/1) ... [2022-11-19 06:53:34,872 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:34" (1/1) ... [2022-11-19 06:53:34,906 INFO L138 Inliner]: procedures = 27, calls = 26, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 80 [2022-11-19 06:53:34,906 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:53:34,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:53:34,908 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:53:34,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:53:34,918 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:34" (1/1) ... [2022-11-19 06:53:34,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:34" (1/1) ... [2022-11-19 06:53:34,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:34" (1/1) ... [2022-11-19 06:53:34,922 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:34" (1/1) ... [2022-11-19 06:53:34,939 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:34" (1/1) ... [2022-11-19 06:53:34,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:34" (1/1) ... [2022-11-19 06:53:34,950 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:34" (1/1) ... [2022-11-19 06:53:34,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:34" (1/1) ... [2022-11-19 06:53:34,959 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:53:34,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:53:34,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:53:34,963 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:53:34,964 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:34" (1/1) ... [2022-11-19 06:53:34,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:53:34,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:53:35,010 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:53:35,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:53:35,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:53:35,058 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-19 06:53:35,058 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-19 06:53:35,058 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-19 06:53:35,059 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-19 06:53:35,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:53:35,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:53:35,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:53:35,060 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 06:53:35,060 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 06:53:35,152 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:53:35,157 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:53:35,367 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:53:35,430 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:53:35,430 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 06:53:35,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:53:35 BoogieIcfgContainer [2022-11-19 06:53:35,433 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:53:35,435 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:53:35,435 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:53:35,439 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:53:35,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:53:34" (1/3) ... [2022-11-19 06:53:35,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@110bb9ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:53:35, skipping insertion in model container [2022-11-19 06:53:35,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:34" (2/3) ... [2022-11-19 06:53:35,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@110bb9ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:53:35, skipping insertion in model container [2022-11-19 06:53:35,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:53:35" (3/3) ... [2022-11-19 06:53:35,443 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_2_6.i [2022-11-19 06:53:35,462 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:53:35,463 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 06:53:35,542 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:53:35,549 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@257e6975, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:53:35,549 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 06:53:35,556 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 20 states have internal predecessors, (25), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 06:53:35,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 06:53:35,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:35,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:53:35,567 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:53:35,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:35,581 INFO L85 PathProgramCache]: Analyzing trace with hash -973186986, now seen corresponding path program 1 times [2022-11-19 06:53:35,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:35,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896208190] [2022-11-19 06:53:35,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:35,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:35,732 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:53:35,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113476324] [2022-11-19 06:53:35,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:35,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:35,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:53:35,737 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:53:35,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:53:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:35,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 06:53:35,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:35,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:35,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:53:35,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:35,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896208190] [2022-11-19 06:53:35,906 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:53:35,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113476324] [2022-11-19 06:53:35,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113476324] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:35,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:53:35,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:53:35,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233503537] [2022-11-19 06:53:35,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:35,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:53:35,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:35,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:53:35,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:53:35,949 INFO L87 Difference]: Start difference. First operand has 31 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 20 states have internal predecessors, (25), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:36,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:36,012 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2022-11-19 06:53:36,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:53:36,015 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 06:53:36,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:36,024 INFO L225 Difference]: With dead ends: 53 [2022-11-19 06:53:36,026 INFO L226 Difference]: Without dead ends: 32 [2022-11-19 06:53:36,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:53:36,032 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:36,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 57 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:53:36,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-19 06:53:36,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-11-19 06:53:36,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 06:53:36,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-11-19 06:53:36,076 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 8 [2022-11-19 06:53:36,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:36,077 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-11-19 06:53:36,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:36,077 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-11-19 06:53:36,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 06:53:36,079 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:36,079 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:53:36,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 06:53:36,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:36,286 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:53:36,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:36,288 INFO L85 PathProgramCache]: Analyzing trace with hash -407210184, now seen corresponding path program 1 times [2022-11-19 06:53:36,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:36,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263784799] [2022-11-19 06:53:36,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:36,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:36,322 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:53:36,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [380904808] [2022-11-19 06:53:36,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:36,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:36,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:53:36,339 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:53:36,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:53:36,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:36,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 06:53:36,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:36,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:36,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:53:36,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:36,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263784799] [2022-11-19 06:53:36,427 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:53:36,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380904808] [2022-11-19 06:53:36,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380904808] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:36,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:53:36,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:53:36,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378930002] [2022-11-19 06:53:36,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:36,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:53:36,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:36,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:53:36,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:53:36,430 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:36,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:36,468 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2022-11-19 06:53:36,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:53:36,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 06:53:36,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:36,484 INFO L225 Difference]: With dead ends: 38 [2022-11-19 06:53:36,484 INFO L226 Difference]: Without dead ends: 28 [2022-11-19 06:53:36,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:53:36,486 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:36,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:53:36,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-19 06:53:36,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-19 06:53:36,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 06:53:36,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-11-19 06:53:36,493 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 9 [2022-11-19 06:53:36,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:36,494 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-11-19 06:53:36,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:36,494 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-11-19 06:53:36,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 06:53:36,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:36,495 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:53:36,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:53:36,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:36,700 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:53:36,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:36,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1214404405, now seen corresponding path program 1 times [2022-11-19 06:53:36,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:36,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456424545] [2022-11-19 06:53:36,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:36,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:36,717 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:53:36,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1563888307] [2022-11-19 06:53:36,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:36,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:36,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:53:36,720 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:53:36,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:53:36,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:36,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 06:53:36,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:36,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:36,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:53:37,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:37,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:37,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456424545] [2022-11-19 06:53:37,025 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:53:37,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563888307] [2022-11-19 06:53:37,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563888307] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:53:37,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [220852300] [2022-11-19 06:53:37,053 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 06:53:37,053 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:53:37,058 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:53:37,071 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:53:37,072 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:53:37,627 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-19 06:53:37,655 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:53:38,234 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '361#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:53:38,235 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:53:38,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:53:38,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-11-19 06:53:38,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476615519] [2022-11-19 06:53:38,236 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:53:38,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:53:38,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:38,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:53:38,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-19 06:53:38,237 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:38,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:38,306 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2022-11-19 06:53:38,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:53:38,307 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 06:53:38,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:38,307 INFO L225 Difference]: With dead ends: 40 [2022-11-19 06:53:38,308 INFO L226 Difference]: Without dead ends: 30 [2022-11-19 06:53:38,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-19 06:53:38,309 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:38,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 64 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:53:38,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-19 06:53:38,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-19 06:53:38,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 06:53:38,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-11-19 06:53:38,317 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 10 [2022-11-19 06:53:38,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:38,318 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-11-19 06:53:38,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:38,318 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-11-19 06:53:38,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 06:53:38,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:38,319 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:53:38,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:53:38,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:38,526 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:53:38,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:38,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1207812715, now seen corresponding path program 2 times [2022-11-19 06:53:38,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:38,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044512780] [2022-11-19 06:53:38,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:38,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:38,544 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:53:38,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856155833] [2022-11-19 06:53:38,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:53:38,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:38,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:53:38,546 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:53:38,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:53:38,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 06:53:38,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:53:38,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 06:53:38,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:38,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:38,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:53:39,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:39,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:39,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044512780] [2022-11-19 06:53:39,004 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:53:39,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856155833] [2022-11-19 06:53:39,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856155833] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:53:39,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1291485025] [2022-11-19 06:53:39,017 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 06:53:39,021 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:53:39,021 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:53:39,021 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:53:39,022 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:53:39,350 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-19 06:53:39,384 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:53:39,915 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '552#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:53:39,915 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:53:39,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:53:39,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-19 06:53:39,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376393531] [2022-11-19 06:53:39,916 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:53:39,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 06:53:39,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:39,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 06:53:39,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-11-19 06:53:39,917 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:40,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:40,075 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2022-11-19 06:53:40,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:53:40,076 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 06:53:40,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:40,077 INFO L225 Difference]: With dead ends: 41 [2022-11-19 06:53:40,077 INFO L226 Difference]: Without dead ends: 31 [2022-11-19 06:53:40,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-11-19 06:53:40,079 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:40,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 104 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:53:40,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-19 06:53:40,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-19 06:53:40,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 06:53:40,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-11-19 06:53:40,089 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 12 [2022-11-19 06:53:40,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:40,089 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-11-19 06:53:40,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:40,090 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-11-19 06:53:40,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 06:53:40,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:40,091 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:53:40,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 06:53:40,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:40,307 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:53:40,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:40,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1606665208, now seen corresponding path program 3 times [2022-11-19 06:53:40,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:40,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766863768] [2022-11-19 06:53:40,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:40,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:40,326 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:53:40,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193560188] [2022-11-19 06:53:40,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:53:40,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:40,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:53:40,328 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:53:40,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 06:53:40,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:53:40,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:53:40,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 06:53:40,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:40,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:53:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:40,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:40,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766863768] [2022-11-19 06:53:40,839 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:53:40,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193560188] [2022-11-19 06:53:40,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193560188] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:53:40,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [966203408] [2022-11-19 06:53:40,857 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 06:53:40,857 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:53:40,858 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:53:40,858 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:53:40,858 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:53:41,098 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-19 06:53:41,121 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:53:41,668 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '755#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:53:41,668 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:53:41,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:53:41,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-19 06:53:41,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669912904] [2022-11-19 06:53:41,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:53:41,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 06:53:41,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:41,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 06:53:41,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-11-19 06:53:41,670 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:42,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:42,131 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2022-11-19 06:53:42,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 06:53:42,131 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-19 06:53:42,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:42,132 INFO L225 Difference]: With dead ends: 46 [2022-11-19 06:53:42,132 INFO L226 Difference]: Without dead ends: 36 [2022-11-19 06:53:42,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2022-11-19 06:53:42,134 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 11 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:42,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 128 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:53:42,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-19 06:53:42,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-19 06:53:42,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 06:53:42,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-11-19 06:53:42,145 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 13 [2022-11-19 06:53:42,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:42,146 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-11-19 06:53:42,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:53:42,146 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-11-19 06:53:42,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 06:53:42,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:42,147 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:53:42,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 06:53:42,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:42,352 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:53:42,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:42,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1086190603, now seen corresponding path program 4 times [2022-11-19 06:53:42,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:42,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456591320] [2022-11-19 06:53:42,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:42,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:42,383 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 06:53:42,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1365745364] [2022-11-19 06:53:42,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:53:42,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:42,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:53:42,388 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:53:42,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 06:53:42,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:42,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-19 06:53:42,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:42,690 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:42,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:53:59,235 WARN L233 SmtUtils]: Spent 10.36s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:54:55,665 WARN L233 SmtUtils]: Spent 44.25s on a formula simplification. DAG size of input: 78 DAG size of output: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:55:45,234 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse12 (* (- 1) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse7 (* |c_ULTIMATE.start_gcd_test_~a#1| 5)) (.cse14 (* (- 2) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse13 (* |c_ULTIMATE.start_gcd_test_~b#1| 3)) (.cse2 (* |c_ULTIMATE.start_gcd_test_~a#1| 4)) (.cse3 (* (- 1) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse11 (* |c_ULTIMATE.start_gcd_test_~b#1| 2)) (.cse1 (* |c_ULTIMATE.start_gcd_test_~b#1| 5)) (.cse9 (* (- 2) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse10 (* |c_ULTIMATE.start_gcd_test_~a#1| 3)) (.cse5 (* |c_ULTIMATE.start_gcd_test_~a#1| 2)) (.cse0 (< |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_gcd_test_~a#1|))) (and (or (not .cse0) (let ((.cse4 (* |c_ULTIMATE.start_gcd_test_~b#1| (- 3))) (.cse6 (* |c_ULTIMATE.start_gcd_test_~b#1| 8)) (.cse8 (* 7 |c_ULTIMATE.start_gcd_test_~b#1|))) (and (or (not (= .cse1 .cse2)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse3)) 0)) (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse4 .cse5)) 0) (not (= .cse6 .cse7))) (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse4)) 0) (not (= .cse5 .cse8))) (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse9)) 0) (not (= .cse10 .cse8))) (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse11 .cse12)) 0) (not (= .cse2 .cse8))) (or (not (= .cse6 .cse10)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse13 .cse12)) 0)) (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (not (= |c_ULTIMATE.start_gcd_test_~a#1| .cse1))) (or (not (= .cse7 .cse8)) (= 0 (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse13 .cse14))))))) (or (let ((.cse15 (* |c_ULTIMATE.start_gcd_test_~a#1| 8)) (.cse18 (* |c_ULTIMATE.start_gcd_test_~b#1| 4)) (.cse17 (* |c_ULTIMATE.start_gcd_test_~a#1| (- 3))) (.cse19 (* 7 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse16 (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse5)))) (and (or (not (= .cse1 .cse15)) .cse16 (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse17 .cse11)) 0)) (or (not (= .cse13 .cse15)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse10 .cse3)) 0) (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse10))) (or (not (= .cse18 .cse7)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse12)) 0) .cse16) (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| 0) (not (= |c_ULTIMATE.start_gcd_test_~b#1| .cse7))) (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse14)) 0) (not (= .cse19 .cse13)) (not (< .cse2 .cse11))) (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse5 .cse3)) 0) (not (= .cse19 .cse18)) .cse16) (or (not (= .cse19 .cse11)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse17 |c_ULTIMATE.start_gcd_test_~b#1|)) 0) (not (< .cse10 |c_ULTIMATE.start_gcd_test_~b#1|))) (or (not (= .cse19 .cse1)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse9 .cse10)) 0) .cse16))) .cse0))) is different from true [2022-11-19 06:56:37,845 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-19 06:56:37,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:56:37,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456591320] [2022-11-19 06:56:37,846 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 06:56:37,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365745364] [2022-11-19 06:56:37,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365745364] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:56:37,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1143892913] [2022-11-19 06:56:37,849 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 06:56:37,849 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:56:37,850 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:56:37,850 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:56:37,850 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:56:38,049 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-19 06:56:38,069 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:56:39,690 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1002#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:56:39,690 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:56:39,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:56:39,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-11-19 06:56:39,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535876662] [2022-11-19 06:56:39,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:56:39,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 06:56:39,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:56:39,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 06:56:39,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=703, Unknown=1, NotChecked=54, Total=870 [2022-11-19 06:56:39,693 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 22 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:56:42,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:56:42,868 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2022-11-19 06:56:42,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 06:56:42,869 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-19 06:56:42,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:56:42,870 INFO L225 Difference]: With dead ends: 50 [2022-11-19 06:56:42,870 INFO L226 Difference]: Without dead ends: 33 [2022-11-19 06:56:42,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 65.2s TimeCoverageRelationStatistics Valid=141, Invalid=854, Unknown=1, NotChecked=60, Total=1056 [2022-11-19 06:56:42,872 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 28 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:56:42,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 200 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 230 Invalid, 0 Unknown, 35 Unchecked, 3.0s Time] [2022-11-19 06:56:42,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-19 06:56:42,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-19 06:56:42,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 06:56:42,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-11-19 06:56:42,884 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 14 [2022-11-19 06:56:42,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:56:42,885 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-11-19 06:56:42,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:56:42,885 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-11-19 06:56:42,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 06:56:42,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:56:42,890 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:56:42,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-19 06:56:43,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 06:56:43,094 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:56:43,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:56:43,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1094258415, now seen corresponding path program 1 times [2022-11-19 06:56:43,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:56:43,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577072238] [2022-11-19 06:56:43,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:43,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:56:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 06:56:43,111 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 06:56:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 06:56:43,153 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 06:56:43,153 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 06:56:43,154 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-11-19 06:56:43,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-19 06:56:43,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 06:56:43,161 INFO L444 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2022-11-19 06:56:43,164 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 06:56:43,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 06:56:43 BoogieIcfgContainer [2022-11-19 06:56:43,193 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 06:56:43,194 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 06:56:43,194 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 06:56:43,194 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 06:56:43,195 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:53:35" (3/4) ... [2022-11-19 06:56:43,198 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-19 06:56:43,199 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 06:56:43,199 INFO L158 Benchmark]: Toolchain (without parser) took 188737.11ms. Allocated memory was 115.3MB in the beginning and 167.8MB in the end (delta: 52.4MB). Free memory was 80.1MB in the beginning and 57.2MB in the end (delta: 23.0MB). Peak memory consumption was 75.0MB. Max. memory is 16.1GB. [2022-11-19 06:56:43,200 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 115.3MB. Free memory is still 97.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 06:56:43,200 INFO L158 Benchmark]: CACSL2BoogieTranslator took 380.40ms. Allocated memory is still 115.3MB. Free memory was 79.9MB in the beginning and 91.0MB in the end (delta: -11.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 06:56:43,200 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.04ms. Allocated memory is still 115.3MB. Free memory was 91.0MB in the beginning and 89.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 06:56:43,201 INFO L158 Benchmark]: Boogie Preprocessor took 53.77ms. Allocated memory is still 115.3MB. Free memory was 89.0MB in the beginning and 88.1MB in the end (delta: 919.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 06:56:43,201 INFO L158 Benchmark]: RCFGBuilder took 471.49ms. Allocated memory is still 115.3MB. Free memory was 87.8MB in the beginning and 72.7MB in the end (delta: 15.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-19 06:56:43,201 INFO L158 Benchmark]: TraceAbstraction took 187758.45ms. Allocated memory was 115.3MB in the beginning and 167.8MB in the end (delta: 52.4MB). Free memory was 71.8MB in the beginning and 58.2MB in the end (delta: 13.6MB). Peak memory consumption was 67.3MB. Max. memory is 16.1GB. [2022-11-19 06:56:43,202 INFO L158 Benchmark]: Witness Printer took 4.74ms. Allocated memory is still 167.8MB. Free memory was 58.2MB in the beginning and 57.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 06:56:43,204 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 115.3MB. Free memory is still 97.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 380.40ms. Allocated memory is still 115.3MB. Free memory was 79.9MB in the beginning and 91.0MB in the end (delta: -11.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.04ms. Allocated memory is still 115.3MB. Free memory was 91.0MB in the beginning and 89.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 53.77ms. Allocated memory is still 115.3MB. Free memory was 89.0MB in the beginning and 88.1MB in the end (delta: 919.7kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 471.49ms. Allocated memory is still 115.3MB. Free memory was 87.8MB in the beginning and 72.7MB in the end (delta: 15.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 187758.45ms. Allocated memory was 115.3MB in the beginning and 167.8MB in the end (delta: 52.4MB). Free memory was 71.8MB in the beginning and 58.2MB in the end (delta: 13.6MB). Peak memory consumption was 67.3MB. Max. memory is 16.1GB. * Witness Printer took 4.74ms. Allocated memory is still 167.8MB. Free memory was 58.2MB in the beginning and 57.2MB in the end (delta: 1.1MB). 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: 109]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 98, overapproximation of someBinaryDOUBLEComparisonOperation at line 108, overapproximation of someBinaryArithmeticFLOAToperation at line 102. Possible FailurePath: [L115] COND FALSE !(__VERIFIER_nondet_int()) [L118] CALL main2() [L97] float IN = __VERIFIER_nondet_float(); [L98] CALL assume_abort_if_not(IN > -1.2f && IN < 1.2f) [L82] COND FALSE !(!cond) [L98] RET assume_abort_if_not(IN > -1.2f && IN < 1.2f) [L100] CALL, EXPR f(IN) VAL [\old(x)=111] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; [L100] RET, EXPR f(IN) VAL [f(IN)=109, IN=111] [L100] CALL, EXPR fp(IN) VAL [\old(x)=111] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; [L100] RET, EXPR fp(IN) VAL [f(IN)=109, fp(IN)=113, IN=111] [L100] float x = IN - f(IN)/fp(IN); [L102] CALL, EXPR f(x) VAL [\old(x)=112] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; [L102] RET, EXPR f(x) VAL [f(x)=110, IN=111, x=112] [L102] CALL, EXPR fp(x) VAL [\old(x)=112] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; [L102] RET, EXPR fp(x) VAL [f(x)=110, fp(x)=114, IN=111, x=112] [L102] x = x - f(x)/fp(x) [L108] COND TRUE !(x < 0.1) VAL [IN=111] [L109] reach_error() VAL [IN=111] - UnprovableResult [Line: 27]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 187.6s, OverallIterations: 7, TraceHistogramMax: 5, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 59 SdHoareTripleChecker+Valid, 3.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 54 mSDsluCounter, 600 SdHoareTripleChecker+Invalid, 3.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 35 IncrementalHoareTripleChecker+Unchecked, 458 mSDsCounter, 68 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 393 IncrementalHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 68 mSolverCounterUnsat, 142 mSDtfsCounter, 393 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 165 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 67.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=5, InterpolantAutomatonStates: 44, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 176.5s InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 105 ConstructedInterpolants, 0 QuantifiedInterpolants, 1744 SizeOfPredicates, 26 NumberOfNonLiveVariables, 457 ConjunctsInSsa, 85 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 0/64 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 [2022-11-19 06:56:43,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/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/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_2_6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS --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 5cac0172a473af199376bf812088f190c7f0980d081815e0ce11da019a58906a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 06:56:45,510 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:56:45,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:56:45,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:56:45,546 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:56:45,551 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:56:45,554 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:56:45,558 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:56:45,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:56:45,569 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:56:45,571 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:56:45,573 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:56:45,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:56:45,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:56:45,577 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:56:45,580 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:56:45,582 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:56:45,584 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:56:45,589 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:56:45,592 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:56:45,599 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:56:45,601 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:56:45,602 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:56:45,605 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:56:45,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:56:45,614 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:56:45,614 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:56:45,615 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:56:45,617 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:56:45,618 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:56:45,618 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:56:45,620 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:56:45,622 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:56:45,622 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:56:45,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:56:45,624 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:56:45,625 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:56:45,626 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:56:45,626 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:56:45,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:56:45,629 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:56:45,630 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-19 06:56:45,675 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:56:45,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:56:45,676 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:56:45,676 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:56:45,677 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:56:45,678 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:56:45,678 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:56:45,678 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:56:45,679 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:56:45,679 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:56:45,680 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:56:45,681 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:56:45,683 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:56:45,683 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:56:45,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:56:45,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:56:45,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:56:45,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:56:45,685 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:56:45,685 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 06:56:45,685 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-19 06:56:45,685 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-19 06:56:45,686 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:56:45,686 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:56:45,686 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:56:45,687 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:56:45,687 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:56:45,687 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-19 06:56:45,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:56:45,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:56:45,688 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:56:45,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:56:45,689 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:56:45,690 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-19 06:56:45,690 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-19 06:56:45,690 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:56:45,691 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:56:45,691 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-19 06:56:45,691 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_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5cac0172a473af199376bf812088f190c7f0980d081815e0ce11da019a58906a [2022-11-19 06:56:46,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:56:46,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:56:46,154 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:56:46,155 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:56:46,156 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:56:46,158 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/gcd_4+newton_2_6.i [2022-11-19 06:56:46,234 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/data/918bde221/d82beebcb1224646a6e8782c714dc2bc/FLAGdd9bcb2dc [2022-11-19 06:56:46,799 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:56:46,800 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/sv-benchmarks/c/combinations/gcd_4+newton_2_6.i [2022-11-19 06:56:46,812 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/data/918bde221/d82beebcb1224646a6e8782c714dc2bc/FLAGdd9bcb2dc [2022-11-19 06:56:47,122 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/data/918bde221/d82beebcb1224646a6e8782c714dc2bc [2022-11-19 06:56:47,125 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:56:47,127 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:56:47,130 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:56:47,130 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:56:47,134 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:56:47,136 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:56:47" (1/1) ... [2022-11-19 06:56:47,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@795ad271 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:47, skipping insertion in model container [2022-11-19 06:56:47,137 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:56:47" (1/1) ... [2022-11-19 06:56:47,145 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:56:47,171 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:56:47,365 WARN L234 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_1c982a52-67af-430c-a75b-9639fe86f3bc/sv-benchmarks/c/combinations/gcd_4+newton_2_6.i[1224,1237] [2022-11-19 06:56:47,391 WARN L234 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_1c982a52-67af-430c-a75b-9639fe86f3bc/sv-benchmarks/c/combinations/gcd_4+newton_2_6.i[2827,2840] [2022-11-19 06:56:47,393 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:56:47,453 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:56:47,466 WARN L234 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_1c982a52-67af-430c-a75b-9639fe86f3bc/sv-benchmarks/c/combinations/gcd_4+newton_2_6.i[1224,1237] [2022-11-19 06:56:47,485 WARN L234 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_1c982a52-67af-430c-a75b-9639fe86f3bc/sv-benchmarks/c/combinations/gcd_4+newton_2_6.i[2827,2840] [2022-11-19 06:56:47,486 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:56:47,502 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:56:47,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:47 WrapperNode [2022-11-19 06:56:47,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:56:47,504 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:56:47,504 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:56:47,504 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:56:47,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:47" (1/1) ... [2022-11-19 06:56:47,522 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:47" (1/1) ... [2022-11-19 06:56:47,543 INFO L138 Inliner]: procedures = 28, calls = 26, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 77 [2022-11-19 06:56:47,543 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:56:47,544 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:56:47,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:56:47,545 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:56:47,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:47" (1/1) ... [2022-11-19 06:56:47,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:47" (1/1) ... [2022-11-19 06:56:47,558 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:47" (1/1) ... [2022-11-19 06:56:47,559 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:47" (1/1) ... [2022-11-19 06:56:47,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:47" (1/1) ... [2022-11-19 06:56:47,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:47" (1/1) ... [2022-11-19 06:56:47,572 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:47" (1/1) ... [2022-11-19 06:56:47,573 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:47" (1/1) ... [2022-11-19 06:56:47,576 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:56:47,577 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:56:47,577 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:56:47,578 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:56:47,578 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:47" (1/1) ... [2022-11-19 06:56:47,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:56:47,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:56:47,615 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:56:47,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:56:47,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:56:47,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-19 06:56:47,655 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-19 06:56:47,655 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-19 06:56:47,655 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-19 06:56:47,656 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-19 06:56:47,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:56:47,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:56:47,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 06:56:47,656 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 06:56:47,740 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:56:47,742 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:56:56,992 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:56:56,999 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:56:57,000 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 06:56:57,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:56:57 BoogieIcfgContainer [2022-11-19 06:56:57,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:56:57,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:56:57,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:56:57,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:56:57,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:56:47" (1/3) ... [2022-11-19 06:56:57,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d1baf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:56:57, skipping insertion in model container [2022-11-19 06:56:57,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:56:47" (2/3) ... [2022-11-19 06:56:57,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d1baf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:56:57, skipping insertion in model container [2022-11-19 06:56:57,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:56:57" (3/3) ... [2022-11-19 06:56:57,033 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_2_6.i [2022-11-19 06:56:57,053 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:56:57,054 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 06:56:57,102 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:56:57,108 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1de947bb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:56:57,108 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 06:56:57,113 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 30 states have (on average 1.4) internal successors, (42), 32 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 06:56:57,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 06:56:57,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:56:57,122 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:56:57,123 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:56:57,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:56:57,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1780479560, now seen corresponding path program 1 times [2022-11-19 06:56:57,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:56:57,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1454464074] [2022-11-19 06:56:57,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:57,141 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:56:57,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:56:57,143 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 06:56:57,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-19 06:56:57,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:56:57,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 06:56:57,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:56:57,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:56:57,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:56:57,387 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:56:57,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1454464074] [2022-11-19 06:56:57,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1454464074] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:56:57,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:56:57,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:56:57,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386336317] [2022-11-19 06:56:57,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:56:57,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:56:57,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:56:57,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:56:57,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:56:57,428 INFO L87 Difference]: Start difference. First operand has 43 states, 30 states have (on average 1.4) internal successors, (42), 32 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:56:57,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:56:57,533 INFO L93 Difference]: Finished difference Result 93 states and 127 transitions. [2022-11-19 06:56:57,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:56:57,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 06:56:57,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:56:57,545 INFO L225 Difference]: With dead ends: 93 [2022-11-19 06:56:57,545 INFO L226 Difference]: Without dead ends: 43 [2022-11-19 06:56:57,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:56:57,552 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 13 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:56:57,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 92 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:56:57,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-19 06:56:57,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2022-11-19 06:56:57,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 06:56:57,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-11-19 06:56:57,597 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 11 [2022-11-19 06:56:57,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:56:57,597 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-11-19 06:56:57,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:56:57,598 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-11-19 06:56:57,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 06:56:57,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:56:57,600 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:56:57,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-19 06:56:57,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:56:57,808 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:56:57,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:56:57,809 INFO L85 PathProgramCache]: Analyzing trace with hash 413626440, now seen corresponding path program 1 times [2022-11-19 06:56:57,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:56:57,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2094974001] [2022-11-19 06:56:57,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:57,810 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:56:57,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:56:57,812 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 06:56:57,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-19 06:56:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:56:57,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 06:56:57,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:56:58,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:56:58,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:56:58,018 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:56:58,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2094974001] [2022-11-19 06:56:58,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2094974001] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:56:58,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:56:58,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:56:58,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775109257] [2022-11-19 06:56:58,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:56:58,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:56:58,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:56:58,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:56:58,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:56:58,027 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:56:58,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:56:58,132 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2022-11-19 06:56:58,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:56:58,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-19 06:56:58,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:56:58,137 INFO L225 Difference]: With dead ends: 52 [2022-11-19 06:56:58,140 INFO L226 Difference]: Without dead ends: 38 [2022-11-19 06:56:58,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:56:58,142 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:56:58,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 70 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:56:58,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-19 06:56:58,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-19 06:56:58,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 06:56:58,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-11-19 06:56:58,160 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 13 [2022-11-19 06:56:58,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:56:58,160 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-11-19 06:56:58,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:56:58,161 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-11-19 06:56:58,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 06:56:58,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:56:58,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:56:58,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:56:58,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:56:58,384 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:56:58,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:56:58,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1715037691, now seen corresponding path program 1 times [2022-11-19 06:56:58,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:56:58,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2085195650] [2022-11-19 06:56:58,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:58,386 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:56:58,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:56:58,387 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 06:56:58,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-19 06:56:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:56:58,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 06:56:58,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:56:58,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:56:58,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:56:58,713 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:56:58,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2085195650] [2022-11-19 06:56:58,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2085195650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:56:58,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:56:58,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:56:58,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361946411] [2022-11-19 06:56:58,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:56:58,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:56:58,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:56:58,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:56:58,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:56:58,717 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:56:58,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:56:58,819 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2022-11-19 06:56:58,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:56:58,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-19 06:56:58,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:56:58,823 INFO L225 Difference]: With dead ends: 53 [2022-11-19 06:56:58,823 INFO L226 Difference]: Without dead ends: 40 [2022-11-19 06:56:58,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:56:58,825 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:56:58,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:56:58,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-19 06:56:58,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-11-19 06:56:58,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 06:56:58,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-11-19 06:56:58,848 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 15 [2022-11-19 06:56:58,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:56:58,849 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-11-19 06:56:58,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:56:58,850 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-11-19 06:56:58,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 06:56:58,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:56:58,853 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:56:58,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:56:59,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:56:59,063 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:56:59,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:56:59,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1030095042, now seen corresponding path program 1 times [2022-11-19 06:56:59,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:56:59,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2075271194] [2022-11-19 06:56:59,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:59,065 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:56:59,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:56:59,079 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 06:56:59,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-19 06:56:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:56:59,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 06:56:59,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:56:59,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:56:59,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:56:59,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:56:59,853 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:56:59,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2075271194] [2022-11-19 06:56:59,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2075271194] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:56:59,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1118609647] [2022-11-19 06:56:59,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:59,854 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:56:59,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:56:59,869 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:56:59,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-11-19 06:57:00,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:00,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 06:57:00,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:57:00,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:57:00,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:57:00,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:57:00,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1118609647] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:57:00,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786743354] [2022-11-19 06:57:00,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:00,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:00,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:57:00,417 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:57:00,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 06:57:00,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:00,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 06:57:00,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:57:00,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:57:00,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:57:01,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:57:01,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786743354] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:57:01,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 06:57:01,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 5, 5] total 10 [2022-11-19 06:57:01,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341983107] [2022-11-19 06:57:01,253 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 06:57:01,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 06:57:01,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:57:01,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 06:57:01,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-19 06:57:01,256 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:01,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:01,689 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2022-11-19 06:57:01,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:57:01,690 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-19 06:57:01,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:01,691 INFO L225 Difference]: With dead ends: 60 [2022-11-19 06:57:01,692 INFO L226 Difference]: Without dead ends: 47 [2022-11-19 06:57:01,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-19 06:57:01,693 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:01,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 197 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 12 Unchecked, 0.3s Time] [2022-11-19 06:57:01,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-19 06:57:01,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-19 06:57:01,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 37 states have internal predecessors, (41), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 06:57:01,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2022-11-19 06:57:01,703 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 17 [2022-11-19 06:57:01,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:01,704 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2022-11-19 06:57:01,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:01,704 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2022-11-19 06:57:01,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 06:57:01,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:01,705 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:57:01,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 06:57:01,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-11-19 06:57:02,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-19 06:57:02,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:57:02,313 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:57:02,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:02,314 INFO L85 PathProgramCache]: Analyzing trace with hash 2101905688, now seen corresponding path program 1 times [2022-11-19 06:57:02,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:57:02,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [738237845] [2022-11-19 06:57:02,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:02,315 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:57:02,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:57:02,316 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 06:57:02,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c982a52-67af-430c-a75b-9639fe86f3bc/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process