./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/gcd_4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/gcd_4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 679f2fe8d678884423b2dff47bf2c3c7ede0374b3a8bb68f9a9e8a332d8776ef --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:42:22,855 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:42:22,858 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:42:22,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:42:22,928 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:42:22,934 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:42:22,936 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:42:22,941 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:42:22,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:42:22,952 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:42:22,953 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:42:22,956 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:42:22,956 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:42:22,959 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:42:22,962 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:42:22,968 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:42:22,969 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:42:22,971 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:42:22,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:42:22,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:42:22,985 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:42:22,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:42:22,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:42:22,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:42:22,999 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:42:23,000 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:42:23,000 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:42:23,003 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:42:23,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:42:23,005 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:42:23,006 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:42:23,007 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:42:23,010 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:42:23,011 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:42:23,013 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:42:23,013 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:42:23,014 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:42:23,014 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:42:23,015 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:42:23,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:42:23,017 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:42:23,018 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:42:23,066 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:42:23,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:42:23,067 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:42:23,068 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:42:23,069 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:42:23,069 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:42:23,070 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:42:23,070 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:42:23,070 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:42:23,070 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:42:23,072 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:42:23,072 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:42:23,072 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:42:23,072 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:42:23,073 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:42:23,073 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:42:23,073 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:42:23,074 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:42:23,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:42:23,075 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:42:23,076 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:42:23,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:42:23,076 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:42:23,076 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:42:23,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:42:23,077 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:42:23,079 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:42:23,079 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:42:23,080 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:42:23,080 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:42:23,080 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:42:23,081 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:42:23,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:42:23,081 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:42:23,081 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:42:23,082 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:42:23,082 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:42:23,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:42:23,082 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:42:23,083 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:42:23,083 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:42:23,083 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 679f2fe8d678884423b2dff47bf2c3c7ede0374b3a8bb68f9a9e8a332d8776ef [2021-11-21 01:42:23,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:42:23,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:42:23,373 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:42:23,375 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:42:23,375 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:42:23,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/bitvector/gcd_4.c [2021-11-21 01:42:23,462 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/data/e14f582a8/3a17005d4a804b1db5ae82e51faaec6e/FLAGf55fe7166 [2021-11-21 01:42:24,000 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:42:24,006 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/sv-benchmarks/c/bitvector/gcd_4.c [2021-11-21 01:42:24,019 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/data/e14f582a8/3a17005d4a804b1db5ae82e51faaec6e/FLAGf55fe7166 [2021-11-21 01:42:24,370 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/data/e14f582a8/3a17005d4a804b1db5ae82e51faaec6e [2021-11-21 01:42:24,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:42:24,377 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:42:24,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:42:24,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:42:24,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:42:24,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:42:24" (1/1) ... [2021-11-21 01:42:24,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@742635cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:24, skipping insertion in model container [2021-11-21 01:42:24,389 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:42:24" (1/1) ... [2021-11-21 01:42:24,397 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:42:24,415 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:42:24,633 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/sv-benchmarks/c/bitvector/gcd_4.c[662,675] [2021-11-21 01:42:24,654 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:42:24,663 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:42:24,677 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/sv-benchmarks/c/bitvector/gcd_4.c[662,675] [2021-11-21 01:42:24,694 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:42:24,710 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:42:24,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:24 WrapperNode [2021-11-21 01:42:24,711 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:42:24,712 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:42:24,712 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:42:24,712 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:42:24,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:24" (1/1) ... [2021-11-21 01:42:24,730 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:24" (1/1) ... [2021-11-21 01:42:24,754 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2021-11-21 01:42:24,755 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:42:24,756 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:42:24,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:42:24,757 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:42:24,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:24" (1/1) ... [2021-11-21 01:42:24,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:24" (1/1) ... [2021-11-21 01:42:24,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:24" (1/1) ... [2021-11-21 01:42:24,779 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:24" (1/1) ... [2021-11-21 01:42:24,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:24" (1/1) ... [2021-11-21 01:42:24,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:24" (1/1) ... [2021-11-21 01:42:24,795 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:24" (1/1) ... [2021-11-21 01:42:24,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:42:24,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:42:24,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:42:24,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:42:24,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:24" (1/1) ... [2021-11-21 01:42:24,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:42:24,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:42:24,839 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:42:24,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:42:24,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:42:24,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:42:24,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:42:24,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:42:24,896 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 01:42:24,897 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 01:42:24,972 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:42:24,974 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:42:25,155 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:42:25,232 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:42:25,232 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 01:42:25,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:42:25 BoogieIcfgContainer [2021-11-21 01:42:25,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:42:25,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:42:25,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:42:25,256 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:42:25,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:42:24" (1/3) ... [2021-11-21 01:42:25,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3208e7ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:42:25, skipping insertion in model container [2021-11-21 01:42:25,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:42:24" (2/3) ... [2021-11-21 01:42:25,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3208e7ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:42:25, skipping insertion in model container [2021-11-21 01:42:25,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:42:25" (3/3) ... [2021-11-21 01:42:25,259 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4.c [2021-11-21 01:42:25,264 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:42:25,265 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:42:25,345 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:42:25,357 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:42:25,358 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:42:25,391 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 01:42:25,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 01:42:25,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:42:25,396 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:42:25,396 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:42:25,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:42:25,402 INFO L85 PathProgramCache]: Analyzing trace with hash 111551512, now seen corresponding path program 1 times [2021-11-21 01:42:25,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:42:25,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971831513] [2021-11-21 01:42:25,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:25,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:42:25,521 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:42:25,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1610275096] [2021-11-21 01:42:25,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:25,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:25,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:42:25,530 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:42:25,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:42:25,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:25,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:42:25,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:42:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:42:25,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:42:25,749 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:42:25,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971831513] [2021-11-21 01:42:25,750 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:42:25,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610275096] [2021-11-21 01:42:25,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610275096] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:42:25,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:42:25,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:42:25,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2837331] [2021-11-21 01:42:25,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:42:25,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:42:25,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:42:25,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:42:25,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:42:25,791 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-11-21 01:42:25,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:42:25,832 INFO L93 Difference]: Finished difference Result 34 states and 49 transitions. [2021-11-21 01:42:25,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:42:25,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 7 [2021-11-21 01:42:25,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:42:25,844 INFO L225 Difference]: With dead ends: 34 [2021-11-21 01:42:25,844 INFO L226 Difference]: Without dead ends: 18 [2021-11-21 01:42:25,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:42:25,853 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:42:25,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 27 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:42:25,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-21 01:42:25,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2021-11-21 01:42:25,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:42:25,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-21 01:42:25,903 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2021-11-21 01:42:25,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:42:25,903 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-21 01:42:25,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-11-21 01:42:25,905 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-21 01:42:25,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:42:25,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:42:25,907 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:42:25,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:42:26,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:26,133 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:42:26,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:42:26,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1751160227, now seen corresponding path program 1 times [2021-11-21 01:42:26,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:42:26,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343586252] [2021-11-21 01:42:26,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:26,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:42:26,152 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:42:26,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1620328793] [2021-11-21 01:42:26,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:26,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:26,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:42:26,166 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:42:26,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:42:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:26,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:42:26,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:42:26,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:42:26,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:42:26,285 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:42:26,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343586252] [2021-11-21 01:42:26,286 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:42:26,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620328793] [2021-11-21 01:42:26,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620328793] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:42:26,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:42:26,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:42:26,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637153544] [2021-11-21 01:42:26,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:42:26,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:42:26,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:42:26,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:42:26,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:42:26,290 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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) [2021-11-21 01:42:26,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:42:26,300 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2021-11-21 01:42:26,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:42:26,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 [2021-11-21 01:42:26,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:42:26,302 INFO L225 Difference]: With dead ends: 24 [2021-11-21 01:42:26,302 INFO L226 Difference]: Without dead ends: 14 [2021-11-21 01:42:26,303 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:42:26,304 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:42:26,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:42:26,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-21 01:42:26,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-21 01:42:26,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:42:26,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-11-21 01:42:26,310 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2021-11-21 01:42:26,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:42:26,310 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-11-21 01:42:26,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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) [2021-11-21 01:42:26,311 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-11-21 01:42:26,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 01:42:26,311 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:42:26,311 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:42:26,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:42:26,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-21 01:42:26,537 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:42:26,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:42:26,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1480537094, now seen corresponding path program 1 times [2021-11-21 01:42:26,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:42:26,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817942394] [2021-11-21 01:42:26,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:26,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:42:26,553 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:42:26,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141138275] [2021-11-21 01:42:26,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:26,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:26,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:42:26,555 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:42:26,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:42:26,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:26,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:42:26,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:42:26,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:42:26,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:42:26,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:42:26,812 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:42:26,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817942394] [2021-11-21 01:42:26,812 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:42:26,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141138275] [2021-11-21 01:42:26,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141138275] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:42:26,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [142170936] [2021-11-21 01:42:26,848 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 01:42:26,858 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:42:26,863 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:42:26,868 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:42:26,882 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:42:29,163 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2021-11-21 01:42:29,236 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:42:29,460 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:42:29,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:42:29,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-11-21 01:42:29,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203817333] [2021-11-21 01:42:29,461 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:42:29,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:42:29,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:42:29,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:42:29,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:42:29,463 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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) [2021-11-21 01:42:29,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:42:29,518 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2021-11-21 01:42:29,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:42:29,519 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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 9 [2021-11-21 01:42:29,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:42:29,520 INFO L225 Difference]: With dead ends: 26 [2021-11-21 01:42:29,520 INFO L226 Difference]: Without dead ends: 16 [2021-11-21 01:42:29,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:42:29,525 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:42:29,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 28 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:42:29,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-21 01:42:29,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-21 01:42:29,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:42:29,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-11-21 01:42:29,543 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2021-11-21 01:42:29,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:42:29,543 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-11-21 01:42:29,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 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) [2021-11-21 01:42:29,544 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-11-21 01:42:29,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 01:42:29,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:42:29,549 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:42:29,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:42:29,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:29,765 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:42:29,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:42:29,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1016290586, now seen corresponding path program 2 times [2021-11-21 01:42:29,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:42:29,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383613355] [2021-11-21 01:42:29,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:29,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:42:29,784 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:42:29,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820815749] [2021-11-21 01:42:29,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:42:29,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:29,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:42:29,788 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:42:29,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:42:29,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 01:42:29,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:42:29,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:42:29,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:42:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:42:29,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:42:30,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:42:30,134 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:42:30,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383613355] [2021-11-21 01:42:30,135 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:42:30,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820815749] [2021-11-21 01:42:30,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820815749] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:42:30,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [368629284] [2021-11-21 01:42:30,142 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 01:42:30,142 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:42:30,144 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:42:30,144 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:42:30,144 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:42:31,558 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2021-11-21 01:42:31,611 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:42:31,839 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:42:31,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:42:31,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-11-21 01:42:31,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716148949] [2021-11-21 01:42:31,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:42:31,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 01:42:31,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:42:31,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 01:42:31,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-11-21 01:42:31,841 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 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) [2021-11-21 01:42:31,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:42:31,945 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-11-21 01:42:31,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:42:31,946 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 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 [2021-11-21 01:42:31,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:42:31,948 INFO L225 Difference]: With dead ends: 27 [2021-11-21 01:42:31,949 INFO L226 Difference]: Without dead ends: 17 [2021-11-21 01:42:31,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-11-21 01:42:31,953 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:42:31,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 62 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:42:31,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-21 01:42:31,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-21 01:42:31,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:42:31,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-21 01:42:31,963 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-11-21 01:42:31,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:42:31,963 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-21 01:42:31,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 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) [2021-11-21 01:42:31,964 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-21 01:42:31,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 01:42:31,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:42:31,965 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:42:32,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:42:32,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:32,189 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:42:32,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:42:32,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1508307811, now seen corresponding path program 3 times [2021-11-21 01:42:32,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:42:32,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884278867] [2021-11-21 01:42:32,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:32,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:42:32,218 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:42:32,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1408943932] [2021-11-21 01:42:32,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:42:32,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:32,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:42:32,225 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:42:32,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:42:32,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:42:32,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:42:32,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 01:42:32,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:42:32,344 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:42:32,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:42:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:42:32,772 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:42:32,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884278867] [2021-11-21 01:42:32,772 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:42:32,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408943932] [2021-11-21 01:42:32,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408943932] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:42:32,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [909496436] [2021-11-21 01:42:32,775 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 01:42:32,775 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:42:32,775 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:42:32,775 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:42:32,776 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:42:33,975 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2021-11-21 01:42:34,025 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:42:34,273 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:42:34,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:42:34,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-11-21 01:42:34,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848518010] [2021-11-21 01:42:34,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:42:34,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 01:42:34,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:42:34,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 01:42:34,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-11-21 01:42:34,275 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 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) [2021-11-21 01:42:34,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:42:34,603 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2021-11-21 01:42:34,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:42:34,603 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 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 [2021-11-21 01:42:34,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:42:34,604 INFO L225 Difference]: With dead ends: 32 [2021-11-21 01:42:34,604 INFO L226 Difference]: Without dead ends: 22 [2021-11-21 01:42:34,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-11-21 01:42:34,606 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:42:34,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:42:34,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-21 01:42:34,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-21 01:42:34,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:42:34,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-11-21 01:42:34,612 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 12 [2021-11-21 01:42:34,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:42:34,613 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-11-21 01:42:34,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 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) [2021-11-21 01:42:34,614 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-11-21 01:42:34,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:42:34,614 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:42:34,614 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:42:34,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:42:34,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:34,825 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:42:34,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:42:34,825 INFO L85 PathProgramCache]: Analyzing trace with hash -419027398, now seen corresponding path program 4 times [2021-11-21 01:42:34,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:42:34,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538385339] [2021-11-21 01:42:34,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:42:34,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:42:34,835 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:42:34,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1623256870] [2021-11-21 01:42:34,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:42:34,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:42:34,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:42:34,862 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:42:34,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:42:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:42:34,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-21 01:42:34,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:42:35,141 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:42:35,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:42:42,232 WARN L227 SmtUtils]: Spent 6.40s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:43:21,867 WARN L227 SmtUtils]: Spent 34.01s on a formula simplification that was a NOOP. DAG size: 82 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:45:18,819 WARN L227 SmtUtils]: Spent 1.41m on a formula simplification that was a NOOP. DAG size: 144 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:45:34,590 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:34,590 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:45:34,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538385339] [2021-11-21 01:45:34,590 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:45:34,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623256870] [2021-11-21 01:45:34,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623256870] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:45:34,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [286260789] [2021-11-21 01:45:34,593 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 01:45:34,593 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:45:34,594 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:45:34,594 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:45:34,594 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:45:37,352 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2021-11-21 01:45:37,395 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:45:40,733 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:45:40,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:45:40,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-11-21 01:45:40,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858511297] [2021-11-21 01:45:40,733 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:45:40,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-21 01:45:40,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:45:40,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-21 01:45:40,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=586, Unknown=3, NotChecked=0, Total=702 [2021-11-21 01:45:40,735 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 20 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:41,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:45:41,656 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-11-21 01:45:41,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:45:41,657 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (2), 1 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 13 [2021-11-21 01:45:41,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:45:41,658 INFO L225 Difference]: With dead ends: 36 [2021-11-21 01:45:41,658 INFO L226 Difference]: Without dead ends: 19 [2021-11-21 01:45:41,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 140.4s TimeCoverageRelationStatistics Valid=142, Invalid=725, Unknown=3, NotChecked=0, Total=870 [2021-11-21 01:45:41,659 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 19 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:45:41,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 72 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:45:41,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-21 01:45:41,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-21 01:45:41,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.0) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 01:45:41,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 18 transitions. [2021-11-21 01:45:41,665 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 18 transitions. Word has length 13 [2021-11-21 01:45:41,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:45:41,665 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 18 transitions. [2021-11-21 01:45:41,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:45:41,666 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 18 transitions. [2021-11-21 01:45:41,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 01:45:41,666 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:45:41,666 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:45:41,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:45:41,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-21 01:45:41,867 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:45:41,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:45:41,868 INFO L85 PathProgramCache]: Analyzing trace with hash -598996777, now seen corresponding path program 1 times [2021-11-21 01:45:41,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:45:41,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262399260] [2021-11-21 01:45:41,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:41,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:45:41,882 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:45:41,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [987817117] [2021-11-21 01:45:41,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:45:41,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:45:41,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:45:41,891 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:45:41,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:45:41,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:45:41,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-21 01:45:41,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:45:42,210 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:45:42,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:46:01,428 WARN L227 SmtUtils]: Spent 15.57s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:46:34,674 WARN L227 SmtUtils]: Spent 25.60s on a formula simplification that was a NOOP. DAG size: 83 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:46:57,688 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse4 (* 4 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse10 (* 2 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse13 (* |c_ULTIMATE.start_gcd_test_~a#1| 2)) (.cse3 (* 5 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse11 (* |c_ULTIMATE.start_gcd_test_~b#1| (- 3))) (.cse8 (* 5 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse7 (* |c_ULTIMATE.start_gcd_test_~a#1| 3)) (.cse5 (* |c_ULTIMATE.start_gcd_test_~b#1| (- 1))) (.cse2 (* |c_ULTIMATE.start_gcd_test_~b#1| (- 2))) (.cse0 (* 3 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (or (<= |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|) (let ((.cse6 (* |c_ULTIMATE.start_gcd_test_~b#1| (- 4))) (.cse1 (* 7 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse9 (* |c_ULTIMATE.start_gcd_test_~b#1| (- 5))) (.cse12 (* 8 |c_ULTIMATE.start_gcd_test_~b#1|))) (and (or (not (= .cse0 .cse1)) (= (mod |c_ULTIMATE.start_main_~y~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse2)) 0)) (or (not (= .cse3 .cse4)) (= (mod |c_ULTIMATE.start_main_~y~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse5)) 0)) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| (+ .cse6 .cse7)) 0) (not (= .cse1 .cse8))) (or (not (= |c_ULTIMATE.start_gcd_test_~a#1| .cse3)) (= (mod |c_ULTIMATE.start_main_~y~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse6)) 0)) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| (+ .cse9 .cse7)) 0) (not (= .cse1 .cse4))) (or (not (= .cse1 .cse10)) (= (mod |c_ULTIMATE.start_main_~y~0#1| (+ .cse11 |c_ULTIMATE.start_gcd_test_~a#1|)) 0)) (or (not (= .cse0 .cse12)) (= (mod |c_ULTIMATE.start_main_~y~0#1| (+ .cse9 .cse13)) 0)) (or (not (= .cse12 .cse8)) (= (mod |c_ULTIMATE.start_main_~y~0#1| (+ .cse11 .cse13)) 0))))) (or (let ((.cse14 (* |c_ULTIMATE.start_gcd_test_~a#1| 4)) (.cse18 (* 8 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse17 (* |c_ULTIMATE.start_gcd_test_~a#1| 5)) (.cse15 (* 7 |c_ULTIMATE.start_gcd_test_~a#1|))) (and (or (<= .cse4 |c_ULTIMATE.start_gcd_test_~b#1|) (= (mod |c_ULTIMATE.start_main_~y~0#1| (+ .cse5 .cse14)) 0) (not (= .cse15 (* 2 |c_ULTIMATE.start_gcd_test_~b#1|)))) (or (<= .cse10 |c_ULTIMATE.start_gcd_test_~b#1|) (let ((.cse16 (* 4 |c_ULTIMATE.start_gcd_test_~b#1|))) (and (or (not (= .cse15 .cse16)) (= (mod |c_ULTIMATE.start_main_~y~0#1| (+ .cse5 .cse13)) 0)) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| (+ .cse11 .cse17)) 0) (not (= .cse18 .cse3))) (or (not (= .cse15 .cse3)) (= (mod |c_ULTIMATE.start_main_~y~0#1| (+ .cse7 .cse2)) 0)) (or (not (= .cse16 .cse8)) (= (mod |c_ULTIMATE.start_main_~y~0#1| (+ .cse11 .cse14)) 0))))) (or (= |c_ULTIMATE.start_gcd_test_~a#1| 0) (= (mod |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0) (not (= |c_ULTIMATE.start_gcd_test_~b#1| .cse8))) (or (let ((.cse19 (* 3 |c_ULTIMATE.start_gcd_test_~b#1|))) (and (or (not (= .cse18 .cse19)) (= (mod |c_ULTIMATE.start_main_~y~0#1| (+ .cse7 .cse5)) 0)) (or (= (mod |c_ULTIMATE.start_main_~y~0#1| (+ .cse17 .cse2)) 0) (not (= .cse19 .cse15))))) (<= .cse0 |c_ULTIMATE.start_gcd_test_~b#1|)))) (< |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_gcd_test_~a#1|)))) is different from true [2021-11-21 01:47:22,160 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-11-21 01:47:22,161 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:47:22,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262399260] [2021-11-21 01:47:22,161 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:47:22,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987817117] [2021-11-21 01:47:22,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987817117] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:47:22,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1027947520] [2021-11-21 01:47:22,163 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-21 01:47:22,164 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:47:22,164 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:47:22,164 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:47:22,164 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:47:25,811 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 19 for LOIs [2021-11-21 01:47:25,876 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:47:26,926 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:47:26,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:47:26,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-11-21 01:47:26,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217704706] [2021-11-21 01:47:26,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:47:26,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-21 01:47:26,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:47:26,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-21 01:47:26,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=640, Unknown=1, NotChecked=52, Total=812 [2021-11-21 01:47:26,928 INFO L87 Difference]: Start difference. First operand 19 states and 18 transitions. Second operand has 20 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:47:27,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:47:27,480 INFO L93 Difference]: Finished difference Result 19 states and 18 transitions. [2021-11-21 01:47:27,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:47:27,480 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-11-21 01:47:27,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:47:27,481 INFO L225 Difference]: With dead ends: 19 [2021-11-21 01:47:27,481 INFO L226 Difference]: Without dead ends: 0 [2021-11-21 01:47:27,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 48.9s TimeCoverageRelationStatistics Valid=147, Invalid=786, Unknown=1, NotChecked=58, Total=992 [2021-11-21 01:47:27,482 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:47:27,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 53 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 105 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time] [2021-11-21 01:47:27,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-21 01:47:27,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-21 01:47:27,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:47:27,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-21 01:47:27,483 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2021-11-21 01:47:27,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:47:27,483 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-21 01:47:27,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 01:47:27,484 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-21 01:47:27,484 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-21 01:47:27,486 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-21 01:47:27,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:47:27,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:27,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-21 01:47:27,966 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-21 01:47:27,966 INFO L858 garLoopResultBuilder]: For program point L23-1(lines 21 37) no Hoare annotation was computed. [2021-11-21 01:47:27,967 INFO L854 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~x~0#1|))) (and (= (+ |ULTIMATE.start_gcd_test_~a#1| 54) |ULTIMATE.start_main_~x~0#1|) (= (+ .cse0 |ULTIMATE.start_gcd_test_~b#1|) 126) (= (+ |ULTIMATE.start_gcd_test_#res#1| 54) |ULTIMATE.start_main_~x~0#1|) (= .cse0 126) (= (+ |ULTIMATE.start_main_~g~0#1| 54) |ULTIMATE.start_main_~x~0#1|))) [2021-11-21 01:47:27,967 INFO L854 garLoopResultBuilder]: At program point L36(lines 20 37) the Hoare annotation is: (and (= (+ |ULTIMATE.start_gcd_test_~a#1| (* 3 |ULTIMATE.start_main_~y~0#1|)) 63) (= |ULTIMATE.start_main_~y~0#1| 18) (= (+ |ULTIMATE.start_gcd_test_#res#1| 54) |ULTIMATE.start_main_~x~0#1|) (= (* 2 |ULTIMATE.start_main_~x~0#1|) 126) (= (* 7 |ULTIMATE.start_main_~y~0#1|) (+ |ULTIMATE.start_gcd_test_~b#1| 126))) [2021-11-21 01:47:27,967 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-21 01:47:27,967 INFO L854 garLoopResultBuilder]: At program point L30-2(lines 29 35) the Hoare annotation is: (let ((.cse2 (= (+ |ULTIMATE.start_gcd_test_~a#1| (* 3 |ULTIMATE.start_main_~y~0#1|)) 63)) (.cse0 (= |ULTIMATE.start_main_~y~0#1| 18)) (.cse1 (= |ULTIMATE.start_gcd_test_~b#1| 18))) (or (and (= |ULTIMATE.start_main_~x~0#1| 63) .cse0 .cse1 (= (+ |ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_main_~y~0#1|) 63)) (and (= 72 (+ |ULTIMATE.start_gcd_test_~b#1| |ULTIMATE.start_main_~x~0#1|)) .cse2 (= |ULTIMATE.start_gcd_test_~b#1| 9) .cse0) (and (= |ULTIMATE.start_gcd_test_~a#1| 27) (= |ULTIMATE.start_main_~x~0#1| (+ |ULTIMATE.start_gcd_test_~a#1| 36)) .cse0 .cse1) (and .cse2 (= (+ (* 2 |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_gcd_test_~b#1|) 126) .cse0 (= (* 7 |ULTIMATE.start_main_~y~0#1|) (+ |ULTIMATE.start_gcd_test_~b#1| 126))) (and (= (+ |ULTIMATE.start_gcd_test_~a#1| 54) |ULTIMATE.start_main_~x~0#1|) .cse2 .cse0 .cse1) (and (= |ULTIMATE.start_gcd_test_~a#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_gcd_test_~a#1| 63) .cse0 .cse1))) [2021-11-21 01:47:27,967 INFO L861 garLoopResultBuilder]: At program point L53(line 53) the Hoare annotation is: true [2021-11-21 01:47:27,967 INFO L854 garLoopResultBuilder]: At program point L51(line 51) the Hoare annotation is: (and (= (+ |ULTIMATE.start_gcd_test_~a#1| (* 3 |ULTIMATE.start_main_~y~0#1|)) 63) (= |ULTIMATE.start_main_~y~0#1| 18) (= (+ |ULTIMATE.start_gcd_test_#res#1| 54) |ULTIMATE.start_main_~x~0#1|) (= (* 2 |ULTIMATE.start_main_~x~0#1|) 126) (= (+ |ULTIMATE.start_main_~g~0#1| 54) |ULTIMATE.start_main_~x~0#1|) (= (* 7 |ULTIMATE.start_main_~y~0#1|) (+ |ULTIMATE.start_gcd_test_~b#1| 126))) [2021-11-21 01:47:27,967 INFO L854 garLoopResultBuilder]: At program point L51-1(line 51) the Hoare annotation is: (and (= (+ |ULTIMATE.start_gcd_test_~a#1| (* 3 |ULTIMATE.start_main_~y~0#1|)) 63) (= |ULTIMATE.start_main_~y~0#1| 18) (= (+ |ULTIMATE.start_gcd_test_#res#1| 54) |ULTIMATE.start_main_~x~0#1|) (= (* 2 |ULTIMATE.start_main_~x~0#1|) 126) (= (+ |ULTIMATE.start_main_~g~0#1| 54) |ULTIMATE.start_main_~x~0#1|) (= (* 7 |ULTIMATE.start_main_~y~0#1|) (+ |ULTIMATE.start_gcd_test_~b#1| 126))) [2021-11-21 01:47:27,967 INFO L858 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2021-11-21 01:47:27,968 INFO L858 garLoopResultBuilder]: For program point L15(lines 15 17) no Hoare annotation was computed. [2021-11-21 01:47:27,968 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 19) the Hoare annotation is: true [2021-11-21 01:47:27,968 INFO L858 garLoopResultBuilder]: For program point L15-2(lines 14 19) no Hoare annotation was computed. [2021-11-21 01:47:27,968 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 19) no Hoare annotation was computed. [2021-11-21 01:47:27,968 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2021-11-21 01:47:27,971 INFO L732 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2021-11-21 01:47:27,972 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 01:47:27,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 01:47:27 BoogieIcfgContainer [2021-11-21 01:47:27,991 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 01:47:27,992 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 01:47:27,992 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 01:47:27,992 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 01:47:27,993 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:42:25" (3/4) ... [2021-11-21 01:47:27,996 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-21 01:47:28,000 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-11-21 01:47:28,004 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2021-11-21 01:47:28,004 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-11-21 01:47:28,004 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-21 01:47:28,005 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-21 01:47:28,024 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((a + 3 * y == 63 && y == 18) && \result + 54 == x) && 2 * x == 126) && 7 * y == b + 126 [2021-11-21 01:47:28,034 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/witness.graphml [2021-11-21 01:47:28,035 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 01:47:28,035 INFO L158 Benchmark]: Toolchain (without parser) took 303658.18ms. Allocated memory was 102.8MB in the beginning and 163.6MB in the end (delta: 60.8MB). Free memory was 68.4MB in the beginning and 43.9MB in the end (delta: 24.4MB). Peak memory consumption was 85.6MB. Max. memory is 16.1GB. [2021-11-21 01:47:28,036 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 102.8MB. Free memory was 58.0MB in the beginning and 57.9MB in the end (delta: 49.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:47:28,036 INFO L158 Benchmark]: CACSL2BoogieTranslator took 330.88ms. Allocated memory is still 102.8MB. Free memory was 68.2MB in the beginning and 77.1MB in the end (delta: -8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 01:47:28,037 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.19ms. Allocated memory is still 102.8MB. Free memory was 77.1MB in the beginning and 75.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:47:28,037 INFO L158 Benchmark]: Boogie Preprocessor took 42.16ms. Allocated memory is still 102.8MB. Free memory was 75.5MB in the beginning and 74.6MB in the end (delta: 877.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:47:28,038 INFO L158 Benchmark]: RCFGBuilder took 435.68ms. Allocated memory is still 102.8MB. Free memory was 74.6MB in the beginning and 64.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-21 01:47:28,038 INFO L158 Benchmark]: TraceAbstraction took 302755.05ms. Allocated memory was 102.8MB in the beginning and 163.6MB in the end (delta: 60.8MB). Free memory was 63.5MB in the beginning and 47.1MB in the end (delta: 16.4MB). Peak memory consumption was 78.1MB. Max. memory is 16.1GB. [2021-11-21 01:47:28,038 INFO L158 Benchmark]: Witness Printer took 42.97ms. Allocated memory is still 163.6MB. Free memory was 46.0MB in the beginning and 43.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 01:47:28,041 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 102.8MB. Free memory was 58.0MB in the beginning and 57.9MB in the end (delta: 49.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 330.88ms. Allocated memory is still 102.8MB. Free memory was 68.2MB in the beginning and 77.1MB in the end (delta: -8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.19ms. Allocated memory is still 102.8MB. Free memory was 77.1MB in the beginning and 75.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 42.16ms. Allocated memory is still 102.8MB. Free memory was 75.5MB in the beginning and 74.6MB in the end (delta: 877.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 435.68ms. Allocated memory is still 102.8MB. Free memory was 74.6MB in the beginning and 64.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 302755.05ms. Allocated memory was 102.8MB in the beginning and 163.6MB in the end (delta: 60.8MB). Free memory was 63.5MB in the beginning and 47.1MB in the end (delta: 16.4MB). Peak memory consumption was 78.1MB. Max. memory is 16.1GB. * Witness Printer took 42.97ms. Allocated memory is still 163.6MB. Free memory was 46.0MB in the beginning and 43.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 302.6s, OverallIterations: 7, TraceHistogramMax: 5, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 64 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 59 mSDsluCounter, 317 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 14 IncrementalHoareTripleChecker+Unchecked, 249 mSDsCounter, 77 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 315 IncrementalHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 77 mSolverCounterUnsat, 73 mSDtfsCounter, 315 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 206 GetRequests, 93 SyntacticMatches, 3 SemanticMatches, 110 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 190.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=5, InterpolantAutomatonStates: 55, 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, 7 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 27 PreInvPairs, 39 NumberOfFragments, 231 HoareAnnotationTreeSize, 27 FomulaSimplifications, 16 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 928 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 281.1s InterpolantComputationTime, 78 NumberOfCodeBlocks, 78 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 129 ConstructedInterpolants, 0 QuantifiedInterpolants, 2782 SizeOfPredicates, 33 NumberOfNonLiveVariables, 415 ConjunctsInSsa, 101 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 4/98 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: (((((((x == 63 && y == 18) && b == 18) && a + y == 63) || (((72 == b + x && a + 3 * y == 63) && b == 9) && y == 18)) || (((a == 27 && x == a + 36) && y == 18) && b == 18)) || (((a + 3 * y == 63 && 2 * x + b == 126) && y == 18) && 7 * y == b + 126)) || (((a + 54 == x && a + 3 * y == 63) && y == 18) && b == 18)) || (((a == x && a == 63) && y == 18) && b == 18) - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (((a + 3 * y == 63 && y == 18) && \result + 54 == x) && 2 * x == 126) && 7 * y == b + 126 - InvariantResult [Line: 53]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-11-21 01:47:28,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e12d4a07-ec18-4e91-a534-29596cc919ca/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE