./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_4+newton_2_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/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_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_2_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/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_0ece62f5-a886-4896-ac72-b42a77d76df7/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 71c49c4d50bf5964bc64c132ffffad0ac21b09eceea3ddcffdb7bfa5d4628635 --- 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 07:40:40,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:40:40,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:40:40,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:40:40,917 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:40:40,919 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:40:40,920 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:40:40,924 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:40:40,930 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:40:40,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:40:40,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:40:40,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:40:40,936 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:40:40,940 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:40:40,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:40:40,947 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:40:40,948 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:40:40,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:40:40,950 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:40:40,961 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:40:40,962 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:40:40,964 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:40:40,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:40:40,966 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:40:40,970 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:40:40,970 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:40:40,971 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:40:40,972 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:40:40,972 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:40:40,973 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:40:40,974 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:40:40,975 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:40:40,975 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:40:40,976 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:40:40,978 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:40:40,978 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:40:40,981 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:40:40,987 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:40:40,988 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:40:40,989 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:40:40,990 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:40:40,991 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:40:41,033 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:40:41,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:40:41,034 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:40:41,035 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:40:41,035 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:40:41,036 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:40:41,036 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:40:41,036 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:40:41,036 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:40:41,037 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:40:41,038 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:40:41,038 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:40:41,038 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:40:41,038 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:40:41,038 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:40:41,039 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:40:41,039 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:40:41,039 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:40:41,040 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:40:41,040 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:40:41,040 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:40:41,041 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:40:41,041 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:40:41,041 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:40:41,041 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:40:41,041 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:40:41,042 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:40:41,042 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:40:41,042 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:40:41,042 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:40:41,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:40:41,043 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:40:41,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:40:41,043 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:40:41,044 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:40:41,044 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:40:41,044 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:40:41,044 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:40:41,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:40:41,045 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:40:41,045 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:40:41,045 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_0ece62f5-a886-4896-ac72-b42a77d76df7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71c49c4d50bf5964bc64c132ffffad0ac21b09eceea3ddcffdb7bfa5d4628635 [2022-11-19 07:40:41,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:40:41,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:40:41,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:40:41,406 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:40:41,407 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:40:41,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/gcd_4+newton_2_2.i [2022-11-19 07:40:41,489 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/data/c4e599c70/31c21a0ad40a47edbf4d0cec1b45d9c0/FLAG8ead7ab52 [2022-11-19 07:40:42,041 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:40:42,041 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/sv-benchmarks/c/combinations/gcd_4+newton_2_2.i [2022-11-19 07:40:42,052 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/data/c4e599c70/31c21a0ad40a47edbf4d0cec1b45d9c0/FLAG8ead7ab52 [2022-11-19 07:40:42,421 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/data/c4e599c70/31c21a0ad40a47edbf4d0cec1b45d9c0 [2022-11-19 07:40:42,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:40:42,430 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:40:42,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:40:42,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:40:42,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:40:42,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:40:42" (1/1) ... [2022-11-19 07:40:42,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11db598b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:42, skipping insertion in model container [2022-11-19 07:40:42,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:40:42" (1/1) ... [2022-11-19 07:40:42,447 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:40:42,472 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:40:42,694 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_0ece62f5-a886-4896-ac72-b42a77d76df7/sv-benchmarks/c/combinations/gcd_4+newton_2_2.i[1224,1237] [2022-11-19 07:40:42,718 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_0ece62f5-a886-4896-ac72-b42a77d76df7/sv-benchmarks/c/combinations/gcd_4+newton_2_2.i[2827,2840] [2022-11-19 07:40:42,720 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:40:42,729 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:40:42,742 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_0ece62f5-a886-4896-ac72-b42a77d76df7/sv-benchmarks/c/combinations/gcd_4+newton_2_2.i[1224,1237] [2022-11-19 07:40:42,752 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_0ece62f5-a886-4896-ac72-b42a77d76df7/sv-benchmarks/c/combinations/gcd_4+newton_2_2.i[2827,2840] [2022-11-19 07:40:42,754 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:40:42,768 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:40:42,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:42 WrapperNode [2022-11-19 07:40:42,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:40:42,770 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:40:42,770 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:40:42,770 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:40:42,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:42" (1/1) ... [2022-11-19 07:40:42,800 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:42" (1/1) ... [2022-11-19 07:40:42,820 INFO L138 Inliner]: procedures = 27, calls = 26, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 80 [2022-11-19 07:40:42,821 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:40:42,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:40:42,822 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:40:42,822 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:40:42,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:42" (1/1) ... [2022-11-19 07:40:42,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:42" (1/1) ... [2022-11-19 07:40:42,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:42" (1/1) ... [2022-11-19 07:40:42,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:42" (1/1) ... [2022-11-19 07:40:42,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:42" (1/1) ... [2022-11-19 07:40:42,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:42" (1/1) ... [2022-11-19 07:40:42,854 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:42" (1/1) ... [2022-11-19 07:40:42,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:42" (1/1) ... [2022-11-19 07:40:42,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:40:42,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:40:42,859 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:40:42,859 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:40:42,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:42" (1/1) ... [2022-11-19 07:40:42,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:40:42,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:40:42,892 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:40:42,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:40:42,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:40:42,938 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-19 07:40:42,938 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-19 07:40:42,939 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-19 07:40:42,939 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-19 07:40:42,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:40:42,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:40:42,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:40:42,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 07:40:42,940 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 07:40:43,020 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:40:43,023 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:40:43,241 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:40:43,289 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:40:43,290 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 07:40:43,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:40:43 BoogieIcfgContainer [2022-11-19 07:40:43,293 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:40:43,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:40:43,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:40:43,299 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:40:43,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:40:42" (1/3) ... [2022-11-19 07:40:43,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a21a088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:40:43, skipping insertion in model container [2022-11-19 07:40:43,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:42" (2/3) ... [2022-11-19 07:40:43,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a21a088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:40:43, skipping insertion in model container [2022-11-19 07:40:43,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:40:43" (3/3) ... [2022-11-19 07:40:43,303 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_2_2.i [2022-11-19 07:40:43,323 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:40:43,323 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 07:40:43,388 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:40:43,398 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;@6e9581e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:40:43,399 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 07:40:43,404 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 07:40:43,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:40:43,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:40:43,414 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:40:43,415 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:40:43,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:40:43,423 INFO L85 PathProgramCache]: Analyzing trace with hash -973186986, now seen corresponding path program 1 times [2022-11-19 07:40:43,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:40:43,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160090619] [2022-11-19 07:40:43,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:40:43,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:40:43,575 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:40:43,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1045577405] [2022-11-19 07:40:43,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:40:43,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:43,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:40:43,586 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:40:43,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:40:43,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:40:43,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:40:43,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:40:43,865 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 07:40:43,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:40:43,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:40:43,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160090619] [2022-11-19 07:40:43,870 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:40:43,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045577405] [2022-11-19 07:40:43,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045577405] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:40:43,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:40:43,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:40:43,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131392854] [2022-11-19 07:40:43,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:40:43,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:40:43,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:40:43,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:40:43,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:40:43,923 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 07:40:44,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:40:44,022 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2022-11-19 07:40:44,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:40:44,025 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 07:40:44,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:40:44,033 INFO L225 Difference]: With dead ends: 53 [2022-11-19 07:40:44,033 INFO L226 Difference]: Without dead ends: 32 [2022-11-19 07:40:44,040 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 07:40:44,044 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:40:44,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 57 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:40:44,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-19 07:40:44,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-11-19 07:40:44,098 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 07:40:44,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-11-19 07:40:44,102 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 8 [2022-11-19 07:40:44,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:40:44,102 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-11-19 07:40:44,103 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 07:40:44,104 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-11-19 07:40:44,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:40:44,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:40:44,106 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:40:44,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:40:44,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:44,314 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:40:44,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:40:44,315 INFO L85 PathProgramCache]: Analyzing trace with hash -407210184, now seen corresponding path program 1 times [2022-11-19 07:40:44,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:40:44,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044938281] [2022-11-19 07:40:44,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:40:44,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:40:44,353 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:40:44,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170751089] [2022-11-19 07:40:44,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:40:44,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:44,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:40:44,357 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:40:44,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:40:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:40:44,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:40:44,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:40:44,446 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 07:40:44,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:40:44,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:40:44,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044938281] [2022-11-19 07:40:44,447 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:40:44,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170751089] [2022-11-19 07:40:44,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170751089] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:40:44,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:40:44,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:40:44,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525267984] [2022-11-19 07:40:44,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:40:44,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:40:44,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:40:44,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:40:44,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:40:44,451 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 07:40:44,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:40:44,487 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2022-11-19 07:40:44,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:40:44,488 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 07:40:44,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:40:44,489 INFO L225 Difference]: With dead ends: 38 [2022-11-19 07:40:44,489 INFO L226 Difference]: Without dead ends: 28 [2022-11-19 07:40:44,490 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 07:40:44,491 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 07:40:44,492 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 07:40:44,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-19 07:40:44,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-19 07:40:44,502 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 07:40:44,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-11-19 07:40:44,506 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 9 [2022-11-19 07:40:44,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:40:44,506 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-11-19 07:40:44,507 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 07:40:44,507 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-11-19 07:40:44,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:40:44,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:40:44,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:40:44,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:40:44,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:44,714 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:40:44,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:40:44,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1214404405, now seen corresponding path program 1 times [2022-11-19 07:40:44,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:40:44,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699900707] [2022-11-19 07:40:44,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:40:44,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:40:44,733 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:40:44,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376986171] [2022-11-19 07:40:44,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:40:44,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:44,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:40:44,744 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:40:44,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:40:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:40:44,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:40:44,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:40:44,914 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 07:40:44,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:40:44,983 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 07:40:44,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:40:44,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699900707] [2022-11-19 07:40:44,984 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:40:44,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376986171] [2022-11-19 07:40:44,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376986171] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:40:44,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2094124507] [2022-11-19 07:40:45,008 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:40:45,008 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:40:45,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:40:45,016 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:40:45,016 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:40:45,533 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-19 07:40:45,562 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:40:46,065 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 07:40:46,065 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:40:46,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:40:46,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-11-19 07:40:46,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333585791] [2022-11-19 07:40:46,066 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:40:46,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:40:46,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:40:46,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:40:46,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:40:46,068 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 07:40:46,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:40:46,138 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2022-11-19 07:40:46,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:40:46,139 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 07:40:46,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:40:46,140 INFO L225 Difference]: With dead ends: 40 [2022-11-19 07:40:46,140 INFO L226 Difference]: Without dead ends: 30 [2022-11-19 07:40:46,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:40:46,148 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 07:40:46,151 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 07:40:46,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-19 07:40:46,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-19 07:40:46,159 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 07:40:46,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-11-19 07:40:46,161 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 10 [2022-11-19 07:40:46,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:40:46,161 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-11-19 07:40:46,162 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 07:40:46,162 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-11-19 07:40:46,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 07:40:46,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:40:46,163 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:40:46,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:40:46,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:46,370 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:40:46,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:40:46,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1207812715, now seen corresponding path program 2 times [2022-11-19 07:40:46,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:40:46,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569738263] [2022-11-19 07:40:46,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:40:46,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:40:46,387 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:40:46,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319809018] [2022-11-19 07:40:46,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:40:46,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:46,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:40:46,389 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:40:46,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:40:46,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:40:46,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:40:46,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:40:46,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:40:46,539 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 07:40:46,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:40:46,772 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 07:40:46,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:40:46,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569738263] [2022-11-19 07:40:46,774 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:40:46,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319809018] [2022-11-19 07:40:46,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319809018] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:40:46,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1937367026] [2022-11-19 07:40:46,785 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:40:46,785 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:40:46,785 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:40:46,785 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:40:46,786 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:40:47,081 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-19 07:40:47,112 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:40:47,638 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 07:40:47,638 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:40:47,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:40:47,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-19 07:40:47,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316486427] [2022-11-19 07:40:47,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:40:47,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 07:40:47,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:40:47,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 07:40:47,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:40:47,640 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 07:40:47,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:40:47,765 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2022-11-19 07:40:47,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:40:47,766 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 07:40:47,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:40:47,767 INFO L225 Difference]: With dead ends: 41 [2022-11-19 07:40:47,767 INFO L226 Difference]: Without dead ends: 31 [2022-11-19 07:40:47,767 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 07:40:47,772 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 07:40:47,772 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 07:40:47,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-19 07:40:47,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-19 07:40:47,783 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 07:40:47,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-11-19 07:40:47,785 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 12 [2022-11-19 07:40:47,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:40:47,786 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-11-19 07:40:47,786 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 07:40:47,786 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-11-19 07:40:47,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 07:40:47,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:40:47,787 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:40:47,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-19 07:40:47,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:47,993 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:40:47,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:40:47,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1606665208, now seen corresponding path program 3 times [2022-11-19 07:40:47,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:40:47,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242232644] [2022-11-19 07:40:47,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:40:47,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:40:48,021 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:40:48,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046474446] [2022-11-19 07:40:48,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:40:48,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:48,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:40:48,023 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:40:48,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:40:48,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:40:48,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:40:48,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:40:48,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:40:48,155 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 07:40:48,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:40:48,591 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 07:40:48,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:40:48,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242232644] [2022-11-19 07:40:48,591 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:40:48,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046474446] [2022-11-19 07:40:48,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046474446] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:40:48,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1755515721] [2022-11-19 07:40:48,594 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:40:48,594 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:40:48,595 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:40:48,595 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:40:48,595 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:40:48,794 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-19 07:40:48,814 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:40:49,379 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 07:40:49,379 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:40:49,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:40:49,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-19 07:40:49,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125220967] [2022-11-19 07:40:49,380 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:40:49,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 07:40:49,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:40:49,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 07:40:49,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:40:49,381 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 07:40:49,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:40:49,854 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2022-11-19 07:40:49,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:40:49,855 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 07:40:49,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:40:49,856 INFO L225 Difference]: With dead ends: 46 [2022-11-19 07:40:49,856 INFO L226 Difference]: Without dead ends: 36 [2022-11-19 07:40:49,856 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 07:40:49,857 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 07:40:49,858 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 07:40:49,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-19 07:40:49,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-19 07:40:49,868 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 07:40:49,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-11-19 07:40:49,869 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 13 [2022-11-19 07:40:49,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:40:49,869 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-11-19 07:40:49,869 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 07:40:49,869 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-11-19 07:40:49,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 07:40:49,870 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:40:49,870 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:40:49,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:40:50,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:50,076 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:40:50,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:40:50,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1086190603, now seen corresponding path program 4 times [2022-11-19 07:40:50,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:40:50,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425911139] [2022-11-19 07:40:50,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:40:50,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:40:50,092 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:40:50,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1454343570] [2022-11-19 07:40:50,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:40:50,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:50,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:40:50,094 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:40:50,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:40:50,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:40:50,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-19 07:40:50,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:40:50,385 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 07:40:50,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:41:09,492 WARN L233 SmtUtils]: Spent 13.24s 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 07:42:15,858 WARN L233 SmtUtils]: Spent 52.18s 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 07:46:09,111 WARN L233 SmtUtils]: Spent 2.80m on a formula simplification that was a NOOP. DAG size: 141 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:46:53,831 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:46:53,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:53,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425911139] [2022-11-19 07:46:53,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:46:53,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454343570] [2022-11-19 07:46:53,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454343570] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:46:53,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1034364084] [2022-11-19 07:46:53,833 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:46:53,833 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:46:53,834 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:46:53,834 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:46:53,834 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:46:54,012 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-19 07:46:54,050 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:47:04,339 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 07:47:04,340 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:47:04,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:47:04,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-11-19 07:47:04,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966961140] [2022-11-19 07:47:04,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:47:04,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 07:47:04,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:04,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 07:47:04,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=742, Unknown=7, NotChecked=0, Total=870 [2022-11-19 07:47:04,342 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 07:47:06,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:47:08,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 07:47:10,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Real, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 07:47:13,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Real, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 07:47:15,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 07:47:17,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 07:47:21,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 07:47:24,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 07:47:24,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:24,712 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2022-11-19 07:47:24,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 07:47:24,712 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 07:47:24,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:24,713 INFO L225 Difference]: With dead ends: 50 [2022-11-19 07:47:24,713 INFO L226 Difference]: Without dead ends: 33 [2022-11-19 07:47:24,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 270.8s TimeCoverageRelationStatistics Valid=152, Invalid=897, Unknown=7, NotChecked=0, Total=1056 [2022-11-19 07:47:24,714 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 30 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 34 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:24,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 215 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 232 Invalid, 7 Unknown, 0 Unchecked, 18.8s Time] [2022-11-19 07:47:24,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-19 07:47:24,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-19 07:47:24,722 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 07:47:24,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-11-19 07:47:24,723 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 14 [2022-11-19 07:47:24,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:24,723 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-11-19 07:47:24,724 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 07:47:24,724 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-11-19 07:47:24,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 07:47:24,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:24,725 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:24,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:24,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 07:47:24,925 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:47:24,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:24,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1094258415, now seen corresponding path program 1 times [2022-11-19 07:47:24,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:24,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577609471] [2022-11-19 07:47:24,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:24,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:24,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:47:24,940 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 07:47:24,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:47:24,971 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 07:47:24,971 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 07:47:24,972 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-11-19 07:47:24,974 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-19 07:47:24,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:47:24,978 INFO L444 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2022-11-19 07:47:24,980 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 07:47:24,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 07:47:24 BoogieIcfgContainer [2022-11-19 07:47:24,998 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 07:47:24,999 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 07:47:24,999 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 07:47:24,999 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 07:47:24,999 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:40:43" (3/4) ... [2022-11-19 07:47:25,002 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-19 07:47:25,002 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 07:47:25,002 INFO L158 Benchmark]: Toolchain (without parser) took 402572.67ms. Allocated memory was 104.9MB in the beginning and 192.9MB in the end (delta: 88.1MB). Free memory was 73.2MB in the beginning and 72.7MB in the end (delta: 502.6kB). Peak memory consumption was 87.9MB. Max. memory is 16.1GB. [2022-11-19 07:47:25,003 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 104.9MB. Free memory was 58.1MB in the beginning and 58.1MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:47:25,003 INFO L158 Benchmark]: CACSL2BoogieTranslator took 335.81ms. Allocated memory is still 104.9MB. Free memory was 72.9MB in the beginning and 80.7MB in the end (delta: -7.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 07:47:25,003 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.27ms. Allocated memory is still 104.9MB. Free memory was 80.7MB in the beginning and 79.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:47:25,003 INFO L158 Benchmark]: Boogie Preprocessor took 36.00ms. Allocated memory is still 104.9MB. Free memory was 79.1MB in the beginning and 77.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:47:25,004 INFO L158 Benchmark]: RCFGBuilder took 434.50ms. Allocated memory is still 104.9MB. Free memory was 77.5MB in the beginning and 62.4MB in the end (delta: 15.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-19 07:47:25,004 INFO L158 Benchmark]: TraceAbstraction took 401703.46ms. Allocated memory was 104.9MB in the beginning and 192.9MB in the end (delta: 88.1MB). Free memory was 61.9MB in the beginning and 72.7MB in the end (delta: -10.7MB). Peak memory consumption was 78.2MB. Max. memory is 16.1GB. [2022-11-19 07:47:25,004 INFO L158 Benchmark]: Witness Printer took 3.56ms. Allocated memory is still 192.9MB. Free memory is still 72.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:47:25,005 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 104.9MB. Free memory was 58.1MB in the beginning and 58.1MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 335.81ms. Allocated memory is still 104.9MB. Free memory was 72.9MB in the beginning and 80.7MB in the end (delta: -7.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.27ms. Allocated memory is still 104.9MB. Free memory was 80.7MB in the beginning and 79.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.00ms. Allocated memory is still 104.9MB. Free memory was 79.1MB in the beginning and 77.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 434.50ms. Allocated memory is still 104.9MB. Free memory was 77.5MB in the beginning and 62.4MB in the end (delta: 15.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 401703.46ms. Allocated memory was 104.9MB in the beginning and 192.9MB in the end (delta: 88.1MB). Free memory was 61.9MB in the beginning and 72.7MB in the end (delta: -10.7MB). Peak memory consumption was 78.2MB. Max. memory is 16.1GB. * Witness Printer took 3.56ms. Allocated memory is still 192.9MB. Free memory is still 72.7MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 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 > -0.4f && IN < 0.4f) [L82] COND FALSE !(!cond) [L98] RET assume_abort_if_not(IN > -0.4f && IN < 0.4f) [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: 401.6s, OverallIterations: 7, TraceHistogramMax: 5, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 21.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 7 mSolverCounterUnknown, 61 SdHoareTripleChecker+Valid, 19.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 56 mSDsluCounter, 615 SdHoareTripleChecker+Invalid, 19.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 473 mSDsCounter, 71 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 395 IncrementalHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 71 mSolverCounterUnsat, 142 mSDtfsCounter, 395 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 164 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 273.1s 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: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 364.9s 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 07:47:25,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/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_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_2_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/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_0ece62f5-a886-4896-ac72-b42a77d76df7/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 71c49c4d50bf5964bc64c132ffffad0ac21b09eceea3ddcffdb7bfa5d4628635 --- 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 07:47:27,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:47:27,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:47:27,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:47:27,349 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:47:27,353 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:47:27,355 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:47:27,359 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:47:27,362 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:47:27,369 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:47:27,371 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:47:27,373 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:47:27,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:47:27,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:47:27,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:47:27,379 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:47:27,380 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:47:27,382 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:47:27,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:47:27,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:47:27,395 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:47:27,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:47:27,398 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:47:27,400 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:47:27,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:47:27,410 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:47:27,410 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:47:27,411 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:47:27,413 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:47:27,413 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:47:27,414 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:47:27,415 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:47:27,417 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:47:27,417 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:47:27,418 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:47:27,419 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:47:27,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:47:27,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:47:27,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:47:27,422 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:47:27,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:47:27,424 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-19 07:47:27,463 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:47:27,463 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:47:27,465 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:47:27,465 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:47:27,466 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:47:27,466 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:47:27,466 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:47:27,467 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:47:27,467 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:47:27,467 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:47:27,468 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:47:27,469 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:47:27,470 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:47:27,471 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:47:27,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:47:27,471 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:47:27,471 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:47:27,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:47:27,472 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:47:27,472 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:47:27,473 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-19 07:47:27,473 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-19 07:47:27,473 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:47:27,473 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:47:27,474 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:47:27,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:47:27,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:47:27,475 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-19 07:47:27,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:47:27,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:47:27,476 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:47:27,476 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:47:27,477 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:47:27,477 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-19 07:47:27,477 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-19 07:47:27,478 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:47:27,478 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:47:27,478 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-19 07:47:27,479 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_0ece62f5-a886-4896-ac72-b42a77d76df7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71c49c4d50bf5964bc64c132ffffad0ac21b09eceea3ddcffdb7bfa5d4628635 [2022-11-19 07:47:27,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:47:27,879 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:47:27,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:47:27,883 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:47:27,884 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:47:27,885 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/gcd_4+newton_2_2.i [2022-11-19 07:47:27,959 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/data/d8fb29607/b003e1a6265c4c879a63a89fb9fc26db/FLAG62680a603 [2022-11-19 07:47:28,463 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:47:28,463 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/sv-benchmarks/c/combinations/gcd_4+newton_2_2.i [2022-11-19 07:47:28,476 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/data/d8fb29607/b003e1a6265c4c879a63a89fb9fc26db/FLAG62680a603 [2022-11-19 07:47:28,812 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/data/d8fb29607/b003e1a6265c4c879a63a89fb9fc26db [2022-11-19 07:47:28,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:47:28,816 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:47:28,818 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:47:28,818 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:47:28,822 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:47:28,823 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:47:28" (1/1) ... [2022-11-19 07:47:28,824 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@502bea31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:28, skipping insertion in model container [2022-11-19 07:47:28,824 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:47:28" (1/1) ... [2022-11-19 07:47:28,832 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:47:28,848 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:47:28,998 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_0ece62f5-a886-4896-ac72-b42a77d76df7/sv-benchmarks/c/combinations/gcd_4+newton_2_2.i[1224,1237] [2022-11-19 07:47:29,023 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_0ece62f5-a886-4896-ac72-b42a77d76df7/sv-benchmarks/c/combinations/gcd_4+newton_2_2.i[2827,2840] [2022-11-19 07:47:29,024 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:47:29,036 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:47:29,076 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_0ece62f5-a886-4896-ac72-b42a77d76df7/sv-benchmarks/c/combinations/gcd_4+newton_2_2.i[1224,1237] [2022-11-19 07:47:29,092 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_0ece62f5-a886-4896-ac72-b42a77d76df7/sv-benchmarks/c/combinations/gcd_4+newton_2_2.i[2827,2840] [2022-11-19 07:47:29,093 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:47:29,107 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:47:29,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:29 WrapperNode [2022-11-19 07:47:29,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:47:29,109 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:47:29,110 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:47:29,110 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:47:29,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:29" (1/1) ... [2022-11-19 07:47:29,127 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:29" (1/1) ... [2022-11-19 07:47:29,153 INFO L138 Inliner]: procedures = 28, calls = 26, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 77 [2022-11-19 07:47:29,154 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:47:29,155 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:47:29,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:47:29,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:47:29,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:29" (1/1) ... [2022-11-19 07:47:29,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:29" (1/1) ... [2022-11-19 07:47:29,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:29" (1/1) ... [2022-11-19 07:47:29,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:29" (1/1) ... [2022-11-19 07:47:29,191 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:29" (1/1) ... [2022-11-19 07:47:29,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:29" (1/1) ... [2022-11-19 07:47:29,197 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:29" (1/1) ... [2022-11-19 07:47:29,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:29" (1/1) ... [2022-11-19 07:47:29,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:47:29,202 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:47:29,202 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:47:29,202 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:47:29,203 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:29" (1/1) ... [2022-11-19 07:47:29,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:47:29,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:29,234 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:47:29,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:47:29,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:47:29,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-19 07:47:29,270 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-19 07:47:29,270 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-19 07:47:29,271 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-19 07:47:29,271 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-19 07:47:29,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:47:29,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:47:29,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 07:47:29,272 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 07:47:29,355 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:47:29,357 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:47:35,820 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:47:35,826 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:47:35,827 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 07:47:35,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:47:35 BoogieIcfgContainer [2022-11-19 07:47:35,829 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:47:35,831 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:47:35,842 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:47:35,846 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:47:35,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:47:28" (1/3) ... [2022-11-19 07:47:35,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31858ae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:47:35, skipping insertion in model container [2022-11-19 07:47:35,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:47:29" (2/3) ... [2022-11-19 07:47:35,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31858ae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:47:35, skipping insertion in model container [2022-11-19 07:47:35,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:47:35" (3/3) ... [2022-11-19 07:47:35,856 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_2_2.i [2022-11-19 07:47:35,869 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:47:35,870 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 07:47:35,914 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:47:35,920 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;@1dd3de5e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:47:35,921 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 07:47:35,924 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 07:47:35,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:47:35,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:35,932 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:35,932 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:47:35,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:35,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1780479560, now seen corresponding path program 1 times [2022-11-19 07:47:35,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:47:35,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [768282131] [2022-11-19 07:47:35,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:35,949 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 07:47:35,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:47:35,950 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/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 07:47:35,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/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 07:47:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:36,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:47:36,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:36,164 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 07:47:36,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:47:36,165 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:47:36,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [768282131] [2022-11-19 07:47:36,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [768282131] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:36,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:36,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:47:36,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412282591] [2022-11-19 07:47:36,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:36,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:47:36,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:47:36,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:47:36,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:47:36,207 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 07:47:36,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:36,302 INFO L93 Difference]: Finished difference Result 93 states and 127 transitions. [2022-11-19 07:47:36,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:47:36,305 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 07:47:36,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:36,312 INFO L225 Difference]: With dead ends: 93 [2022-11-19 07:47:36,313 INFO L226 Difference]: Without dead ends: 43 [2022-11-19 07:47:36,315 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 07:47:36,319 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 07:47:36,320 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 07:47:36,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-19 07:47:36,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2022-11-19 07:47:36,355 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 07:47:36,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-11-19 07:47:36,358 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 11 [2022-11-19 07:47:36,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:36,359 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-11-19 07:47:36,359 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 07:47:36,359 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-11-19 07:47:36,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 07:47:36,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:36,361 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:36,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/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 07:47:36,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/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 07:47:36,562 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:47:36,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:36,563 INFO L85 PathProgramCache]: Analyzing trace with hash 413626440, now seen corresponding path program 1 times [2022-11-19 07:47:36,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:47:36,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1336540906] [2022-11-19 07:47:36,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:36,564 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 07:47:36,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:47:36,566 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/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 07:47:36,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/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 07:47:36,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:36,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:47:36,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:36,751 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 07:47:36,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:47:36,752 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:47:36,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1336540906] [2022-11-19 07:47:36,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1336540906] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:36,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:36,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:47:36,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528479828] [2022-11-19 07:47:36,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:36,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:47:36,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:47:36,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:47:36,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:47:36,760 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 07:47:36,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:36,838 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2022-11-19 07:47:36,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:47:36,844 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 07:47:36,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:36,845 INFO L225 Difference]: With dead ends: 52 [2022-11-19 07:47:36,845 INFO L226 Difference]: Without dead ends: 38 [2022-11-19 07:47:36,845 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 07:47:36,847 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 07:47:36,849 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 07:47:36,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-19 07:47:36,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-19 07:47:36,860 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 07:47:36,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-11-19 07:47:36,867 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 13 [2022-11-19 07:47:36,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:36,867 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-11-19 07:47:36,868 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 07:47:36,868 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-11-19 07:47:36,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 07:47:36,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:36,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:36,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/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 07:47:37,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/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 07:47:37,088 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:47:37,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:37,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1715037691, now seen corresponding path program 1 times [2022-11-19 07:47:37,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:47:37,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134726196] [2022-11-19 07:47:37,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:37,090 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 07:47:37,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:47:37,092 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/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 07:47:37,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/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 07:47:37,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:37,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:47:37,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:37,408 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 07:47:37,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:47:37,409 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:47:37,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1134726196] [2022-11-19 07:47:37,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1134726196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:37,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:37,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:47:37,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291623131] [2022-11-19 07:47:37,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:37,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:47:37,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:47:37,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:47:37,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:47:37,417 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 07:47:37,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:37,504 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2022-11-19 07:47:37,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:47:37,505 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 07:47:37,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:37,506 INFO L225 Difference]: With dead ends: 53 [2022-11-19 07:47:37,506 INFO L226 Difference]: Without dead ends: 40 [2022-11-19 07:47:37,507 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 07:47:37,508 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 07:47:37,508 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 07:47:37,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-19 07:47:37,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-11-19 07:47:37,519 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 07:47:37,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-11-19 07:47:37,522 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 15 [2022-11-19 07:47:37,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:37,522 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-11-19 07:47:37,522 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 07:47:37,523 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-11-19 07:47:37,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 07:47:37,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:37,524 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:37,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/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 07:47:37,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/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 07:47:37,732 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:47:37,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:37,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1030095042, now seen corresponding path program 1 times [2022-11-19 07:47:37,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:47:37,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703794229] [2022-11-19 07:47:37,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:37,734 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 07:47:37,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:47:37,735 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/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 07:47:37,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/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 07:47:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:37,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:47:37,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:38,191 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 07:47:38,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:38,426 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 07:47:38,426 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:47:38,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703794229] [2022-11-19 07:47:38,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703794229] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:47:38,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [750800088] [2022-11-19 07:47:38,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:38,427 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:47:38,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:47:38,434 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:47:38,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-11-19 07:47:38,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:38,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:47:38,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:38,805 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 07:47:38,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:38,933 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 07:47:38,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [750800088] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:47:38,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83273008] [2022-11-19 07:47:38,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:38,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:38,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:38,938 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:38,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:47:39,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:39,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:47:39,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:39,353 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 07:47:39,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:39,742 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 07:47:39,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83273008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:47:39,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:47:39,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 5, 5] total 10 [2022-11-19 07:47:39,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555932732] [2022-11-19 07:47:39,743 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:47:39,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 07:47:39,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:47:39,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 07:47:39,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:47:39,745 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 07:47:40,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:40,145 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2022-11-19 07:47:40,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:47:40,146 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 07:47:40,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:40,147 INFO L225 Difference]: With dead ends: 60 [2022-11-19 07:47:40,147 INFO L226 Difference]: Without dead ends: 47 [2022-11-19 07:47:40,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:47:40,148 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 07:47:40,149 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 07:47:40,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-19 07:47:40,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-19 07:47:40,156 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 07:47:40,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2022-11-19 07:47:40,157 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 17 [2022-11-19 07:47:40,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:40,158 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2022-11-19 07:47:40,158 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 07:47:40,158 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2022-11-19 07:47:40,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 07:47:40,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:40,159 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 07:47:40,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:40,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/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 07:47:40,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2022-11-19 07:47:40,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/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=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:47:40,768 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:47:40,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:40,769 INFO L85 PathProgramCache]: Analyzing trace with hash 2101905688, now seen corresponding path program 1 times [2022-11-19 07:47:40,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:47:40,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1396495860] [2022-11-19 07:47:40,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:40,770 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 07:47:40,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:47:40,771 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/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 07:47:40,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ece62f5-a886-4896-ac72-b42a77d76df7/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