./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound20.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_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/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_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/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_1b53f9b7-83ca-432f-b7cf-750b34504971/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 4aef2940f6d326843487f003443fc222e2136d386047f492f8bd5c7e21afc8f5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:36:56,812 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:36:56,815 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:36:56,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:36:56,891 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:36:56,898 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:36:56,900 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:36:56,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:36:56,910 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:36:56,920 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:36:56,922 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:36:56,925 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:36:56,925 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:36:56,930 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:36:56,933 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:36:56,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:36:56,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:36:56,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:36:56,952 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:36:56,961 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:36:56,965 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:36:56,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:36:56,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:36:56,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:36:56,983 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:36:56,984 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:36:56,984 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:36:56,987 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:36:56,988 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:36:56,991 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:36:56,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:36:56,993 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:36:56,996 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:36:56,997 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:36:56,999 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:36:57,000 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:36:57,001 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:36:57,001 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:36:57,002 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:36:57,003 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:36:57,004 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:36:57,006 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:36:57,072 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:36:57,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:36:57,076 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:36:57,076 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:36:57,086 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:36:57,086 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:36:57,090 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:36:57,091 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:36:57,091 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:36:57,092 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:36:57,093 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:36:57,094 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:36:57,094 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:36:57,094 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:36:57,095 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:36:57,095 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:36:57,095 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:36:57,096 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:36:57,097 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:36:57,097 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:36:57,098 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:36:57,098 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:36:57,098 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:36:57,099 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:36:57,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:36:57,099 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:36:57,102 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:36:57,102 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:36:57,103 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:36:57,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:36:57,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:36:57,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:36:57,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:36:57,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:36:57,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:36:57,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:36:57,106 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:36:57,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:36:57,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:36:57,107 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:36:57,107 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:36:57,107 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_1b53f9b7-83ca-432f-b7cf-750b34504971/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4aef2940f6d326843487f003443fc222e2136d386047f492f8bd5c7e21afc8f5 [2021-11-20 23:36:57,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:36:57,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:36:57,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:36:57,549 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:36:57,550 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:36:57,552 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound20.c [2021-11-20 23:36:57,642 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/data/37b219748/e4e15fb0edde4f6281c4765571d106df/FLAGef5c10e4b [2021-11-20 23:36:58,256 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:36:58,257 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound20.c [2021-11-20 23:36:58,272 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/data/37b219748/e4e15fb0edde4f6281c4765571d106df/FLAGef5c10e4b [2021-11-20 23:36:58,611 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/data/37b219748/e4e15fb0edde4f6281c4765571d106df [2021-11-20 23:36:58,615 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:36:58,617 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:36:58,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:36:58,620 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:36:58,629 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:36:58,630 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:36:58" (1/1) ... [2021-11-20 23:36:58,632 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e4a09c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:58, skipping insertion in model container [2021-11-20 23:36:58,633 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:36:58" (1/1) ... [2021-11-20 23:36:58,655 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:36:58,671 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:36:58,878 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_1b53f9b7-83ca-432f-b7cf-750b34504971/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound20.c[489,502] [2021-11-20 23:36:58,900 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:36:58,910 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:36:58,923 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_1b53f9b7-83ca-432f-b7cf-750b34504971/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound20.c[489,502] [2021-11-20 23:36:58,934 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:36:58,950 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:36:58,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:58 WrapperNode [2021-11-20 23:36:58,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:36:58,952 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:36:58,952 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:36:58,952 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:36:58,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:58" (1/1) ... [2021-11-20 23:36:58,971 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:58" (1/1) ... [2021-11-20 23:36:58,997 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 59 [2021-11-20 23:36:58,997 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:36:58,999 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:36:58,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:36:58,999 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:36:59,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:58" (1/1) ... [2021-11-20 23:36:59,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:58" (1/1) ... [2021-11-20 23:36:59,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:58" (1/1) ... [2021-11-20 23:36:59,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:58" (1/1) ... [2021-11-20 23:36:59,021 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:58" (1/1) ... [2021-11-20 23:36:59,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:58" (1/1) ... [2021-11-20 23:36:59,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:58" (1/1) ... [2021-11-20 23:36:59,030 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:36:59,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:36:59,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:36:59,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:36:59,043 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:58" (1/1) ... [2021-11-20 23:36:59,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:36:59,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:36:59,092 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:36:59,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:36:59,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:36:59,153 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 23:36:59,153 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 23:36:59,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:36:59,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:36:59,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:36:59,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 23:36:59,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 23:36:59,249 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:36:59,252 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:36:59,487 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:36:59,522 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:36:59,522 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 23:36:59,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:36:59 BoogieIcfgContainer [2021-11-20 23:36:59,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:36:59,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:36:59,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:36:59,533 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:36:59,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:36:58" (1/3) ... [2021-11-20 23:36:59,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fe0fcd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:36:59, skipping insertion in model container [2021-11-20 23:36:59,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:58" (2/3) ... [2021-11-20 23:36:59,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fe0fcd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:36:59, skipping insertion in model container [2021-11-20 23:36:59,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:36:59" (3/3) ... [2021-11-20 23:36:59,537 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound20.c [2021-11-20 23:36:59,544 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:36:59,544 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:36:59,611 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:36:59,621 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 [2021-11-20 23:36:59,622 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:36:59,645 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 23:36:59,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 23:36:59,652 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:59,653 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:59,654 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:36:59,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:59,662 INFO L85 PathProgramCache]: Analyzing trace with hash 2091718616, now seen corresponding path program 1 times [2021-11-20 23:36:59,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:59,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302028462] [2021-11-20 23:36:59,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:59,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:59,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:36:59,928 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:59,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302028462] [2021-11-20 23:36:59,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302028462] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:59,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:59,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:36:59,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901192459] [2021-11-20 23:36:59,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:59,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 23:36:59,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:00,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 23:37:00,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:37:00,017 INFO L87 Difference]: Start difference. First operand has 24 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:37:00,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:00,063 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2021-11-20 23:37:00,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 23:37:00,066 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2021-11-20 23:37:00,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:00,077 INFO L225 Difference]: With dead ends: 42 [2021-11-20 23:37:00,078 INFO L226 Difference]: Without dead ends: 22 [2021-11-20 23:37:00,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:37:00,089 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:00,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:37:00,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-20 23:37:00,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-20 23:37:00,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 23:37:00,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2021-11-20 23:37:00,144 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 13 [2021-11-20 23:37:00,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:00,146 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2021-11-20 23:37:00,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:37:00,147 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2021-11-20 23:37:00,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 23:37:00,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:00,149 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:00,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:37:00,150 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:37:00,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:00,152 INFO L85 PathProgramCache]: Analyzing trace with hash -234462492, now seen corresponding path program 1 times [2021-11-20 23:37:00,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:00,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677951161] [2021-11-20 23:37:00,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:00,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:00,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:00,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:37:00,254 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:00,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677951161] [2021-11-20 23:37:00,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677951161] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:00,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:37:00,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:37:00,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128092963] [2021-11-20 23:37:00,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:00,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:37:00,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:00,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:37:00,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:37:00,260 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:37:00,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:00,309 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2021-11-20 23:37:00,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:37:00,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2021-11-20 23:37:00,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:00,311 INFO L225 Difference]: With dead ends: 34 [2021-11-20 23:37:00,312 INFO L226 Difference]: Without dead ends: 24 [2021-11-20 23:37:00,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:37:00,315 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 3 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:00,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 69 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:37:00,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-20 23:37:00,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-20 23:37:00,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 23:37:00,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2021-11-20 23:37:00,329 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 14 [2021-11-20 23:37:00,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:00,330 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2021-11-20 23:37:00,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:37:00,331 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2021-11-20 23:37:00,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 23:37:00,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:00,332 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:00,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:37:00,333 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:37:00,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:00,336 INFO L85 PathProgramCache]: Analyzing trace with hash -232794196, now seen corresponding path program 1 times [2021-11-20 23:37:00,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:00,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041112813] [2021-11-20 23:37:00,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:00,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:00,362 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:37:00,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1323070470] [2021-11-20 23:37:00,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:00,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:37:00,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:37:00,366 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:37:00,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:37:00,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:00,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 23:37:00,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:37:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:37:00,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:37:00,630 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:00,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041112813] [2021-11-20 23:37:00,631 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:37:00,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323070470] [2021-11-20 23:37:00,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323070470] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:00,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:37:00,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:37:00,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393435858] [2021-11-20 23:37:00,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:00,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:37:00,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:00,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:37:00,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:37:00,635 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:37:00,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:00,720 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-11-20 23:37:00,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:37:00,721 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2021-11-20 23:37:00,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:00,723 INFO L225 Difference]: With dead ends: 38 [2021-11-20 23:37:00,723 INFO L226 Difference]: Without dead ends: 36 [2021-11-20 23:37:00,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:37:00,726 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:00,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 110 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:37:00,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-20 23:37:00,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-11-20 23:37:00,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-20 23:37:00,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-11-20 23:37:00,744 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 14 [2021-11-20 23:37:00,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:00,745 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-11-20 23:37:00,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 23:37:00,745 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-11-20 23:37:00,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 23:37:00,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:00,747 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:00,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:37:00,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:37:00,962 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:37:00,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:00,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1519768090, now seen corresponding path program 1 times [2021-11-20 23:37:00,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:00,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345671361] [2021-11-20 23:37:00,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:00,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:00,985 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:37:00,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390566124] [2021-11-20 23:37:00,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:00,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:37:00,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:37:00,988 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:37:01,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:37:01,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:01,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 23:37:01,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:37:01,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:37:01,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:37:01,525 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:01,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345671361] [2021-11-20 23:37:01,529 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:37:01,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390566124] [2021-11-20 23:37:01,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390566124] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:01,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:37:01,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-20 23:37:01,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167101698] [2021-11-20 23:37:01,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:01,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:37:01,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:01,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:37:01,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:37:01,533 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 23:37:01,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:01,723 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2021-11-20 23:37:01,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:37:01,725 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2021-11-20 23:37:01,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:01,731 INFO L225 Difference]: With dead ends: 42 [2021-11-20 23:37:01,731 INFO L226 Difference]: Without dead ends: 40 [2021-11-20 23:37:01,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:37:01,738 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 15 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:01,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 139 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:37:01,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-20 23:37:01,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-11-20 23:37:01,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-20 23:37:01,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2021-11-20 23:37:01,778 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 19 [2021-11-20 23:37:01,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:01,779 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2021-11-20 23:37:01,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 23:37:01,780 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2021-11-20 23:37:01,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 23:37:01,781 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:01,782 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:01,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:37:02,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:37:02,011 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:37:02,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:02,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1808022612, now seen corresponding path program 1 times [2021-11-20 23:37:02,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:02,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997307884] [2021-11-20 23:37:02,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:02,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:02,033 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:37:02,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [894828975] [2021-11-20 23:37:02,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:02,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:37:02,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:37:02,055 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:37:02,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:37:02,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:02,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 23:37:02,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:37:02,431 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 23:37:02,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:37:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 23:37:02,620 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:02,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997307884] [2021-11-20 23:37:02,620 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:37:02,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894828975] [2021-11-20 23:37:02,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894828975] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 23:37:02,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:37:02,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2021-11-20 23:37:02,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511850573] [2021-11-20 23:37:02,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:02,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:37:02,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:02,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:37:02,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:37:02,625 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 23:37:02,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:02,714 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2021-11-20 23:37:02,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:37:02,714 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2021-11-20 23:37:02,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:02,720 INFO L225 Difference]: With dead ends: 46 [2021-11-20 23:37:02,720 INFO L226 Difference]: Without dead ends: 42 [2021-11-20 23:37:02,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:37:02,730 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:02,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 109 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:37:02,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-20 23:37:02,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-20 23:37:02,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-20 23:37:02,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2021-11-20 23:37:02,744 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 24 [2021-11-20 23:37:02,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:02,745 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2021-11-20 23:37:02,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 23:37:02,746 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2021-11-20 23:37:02,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 23:37:02,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:02,747 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:02,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:37:02,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:37:02,963 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:37:02,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:02,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1397146583, now seen corresponding path program 1 times [2021-11-20 23:37:02,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:02,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217800520] [2021-11-20 23:37:02,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:02,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:02,993 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:37:02,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313390594] [2021-11-20 23:37:02,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:02,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:37:02,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:37:03,007 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:37:03,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 23:37:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:03,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:37:03,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:37:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 23:37:03,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:37:03,167 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:03,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217800520] [2021-11-20 23:37:03,167 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:37:03,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313390594] [2021-11-20 23:37:03,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313390594] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:03,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:37:03,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:37:03,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713499773] [2021-11-20 23:37:03,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:03,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:37:03,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:03,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:37:03,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:37:03,174 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-20 23:37:03,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:03,260 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2021-11-20 23:37:03,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:37:03,261 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 30 [2021-11-20 23:37:03,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:03,265 INFO L225 Difference]: With dead ends: 52 [2021-11-20 23:37:03,265 INFO L226 Difference]: Without dead ends: 50 [2021-11-20 23:37:03,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:37:03,271 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:03,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 109 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:37:03,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-20 23:37:03,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2021-11-20 23:37:03,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 25 states have (on average 1.16) internal successors, (29), 28 states have internal predecessors, (29), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 23:37:03,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2021-11-20 23:37:03,301 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 30 [2021-11-20 23:37:03,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:03,302 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2021-11-20 23:37:03,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-20 23:37:03,302 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2021-11-20 23:37:03,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 23:37:03,304 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:03,305 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:03,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-20 23:37:03,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:37:03,519 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:37:03,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:03,520 INFO L85 PathProgramCache]: Analyzing trace with hash 882095404, now seen corresponding path program 1 times [2021-11-20 23:37:03,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:03,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890691177] [2021-11-20 23:37:03,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:03,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:03,536 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:37:03,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1493084527] [2021-11-20 23:37:03,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:03,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:37:03,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:37:03,543 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:37:03,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 23:37:03,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:03,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:37:03,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:37:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 23:37:03,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:37:03,822 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 23:37:03,822 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:03,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890691177] [2021-11-20 23:37:03,823 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:37:03,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493084527] [2021-11-20 23:37:03,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493084527] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:37:03,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1547080585] [2021-11-20 23:37:03,850 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2021-11-20 23:37:03,850 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:37:03,857 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:37:03,864 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:37:03,865 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:37:21,187 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2021-11-20 23:37:21,290 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 53 for LOIs [2021-11-20 23:37:21,405 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:37:22,626 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:37:22,626 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:37:22,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-11-20 23:37:22,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434918635] [2021-11-20 23:37:22,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:37:22,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:37:22,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:22,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:37:22,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-11-20 23:37:22,629 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-20 23:37:22,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:22,782 INFO L93 Difference]: Finished difference Result 109 states and 132 transitions. [2021-11-20 23:37:22,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 23:37:22,783 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 32 [2021-11-20 23:37:22,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:22,785 INFO L225 Difference]: With dead ends: 109 [2021-11-20 23:37:22,786 INFO L226 Difference]: Without dead ends: 97 [2021-11-20 23:37:22,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-11-20 23:37:22,788 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 48 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:22,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 137 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:37:22,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-20 23:37:22,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2021-11-20 23:37:22,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 50 states have (on average 1.16) internal successors, (58), 54 states have internal predecessors, (58), 29 states have call successors, (29), 12 states have call predecessors, (29), 11 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2021-11-20 23:37:22,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2021-11-20 23:37:22,804 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 32 [2021-11-20 23:37:22,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:22,805 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2021-11-20 23:37:22,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-20 23:37:22,805 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2021-11-20 23:37:22,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 23:37:22,806 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:22,806 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:22,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 23:37:23,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:37:23,030 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:37:23,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:23,030 INFO L85 PathProgramCache]: Analyzing trace with hash 883763700, now seen corresponding path program 1 times [2021-11-20 23:37:23,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:23,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066485086] [2021-11-20 23:37:23,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:23,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:23,048 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:37:23,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [170281247] [2021-11-20 23:37:23,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:23,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:37:23,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:37:23,051 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:37:23,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 23:37:23,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:23,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 23:37:23,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:37:23,443 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 23:37:23,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:37:23,633 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 23:37:23,633 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:23,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066485086] [2021-11-20 23:37:23,634 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:37:23,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170281247] [2021-11-20 23:37:23,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170281247] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 23:37:23,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:37:23,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-11-20 23:37:23,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456182751] [2021-11-20 23:37:23,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:23,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:37:23,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:23,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:37:23,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:37:23,637 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 23:37:23,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:23,704 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2021-11-20 23:37:23,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:37:23,705 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2021-11-20 23:37:23,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:23,710 INFO L225 Difference]: With dead ends: 105 [2021-11-20 23:37:23,710 INFO L226 Difference]: Without dead ends: 103 [2021-11-20 23:37:23,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:37:23,712 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:23,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 76 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:37:23,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-20 23:37:23,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-11-20 23:37:23,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 63 states have internal predecessors, (67), 29 states have call successors, (29), 15 states have call predecessors, (29), 14 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2021-11-20 23:37:23,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2021-11-20 23:37:23,756 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 32 [2021-11-20 23:37:23,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:23,757 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2021-11-20 23:37:23,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 23:37:23,757 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2021-11-20 23:37:23,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 23:37:23,766 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:23,766 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:23,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 23:37:23,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:37:23,987 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:37:23,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:23,988 INFO L85 PathProgramCache]: Analyzing trace with hash 481580745, now seen corresponding path program 1 times [2021-11-20 23:37:23,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:23,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275683777] [2021-11-20 23:37:23,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:23,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:24,012 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:37:24,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1038469611] [2021-11-20 23:37:24,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:24,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:37:24,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:37:24,049 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:37:24,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 23:37:24,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:24,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 23:37:24,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:37:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 23:37:24,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:37:24,503 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 23:37:24,503 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:24,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275683777] [2021-11-20 23:37:24,504 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:37:24,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038469611] [2021-11-20 23:37:24,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038469611] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:37:24,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1277190448] [2021-11-20 23:37:24,509 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-20 23:37:24,509 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:37:24,510 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:37:24,510 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:37:24,511 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:37:27,169 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2021-11-20 23:37:27,311 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 53 for LOIs [2021-11-20 23:37:27,428 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:37:28,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1277190448] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:28,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:37:28,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [8, 8] total 20 [2021-11-20 23:37:28,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390673920] [2021-11-20 23:37:28,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:28,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 23:37:28,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:28,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 23:37:28,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-11-20 23:37:28,323 INFO L87 Difference]: Start difference. First operand 103 states and 121 transitions. Second operand has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 23:37:28,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:28,673 INFO L93 Difference]: Finished difference Result 105 states and 122 transitions. [2021-11-20 23:37:28,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 23:37:28,675 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 35 [2021-11-20 23:37:28,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:28,681 INFO L225 Difference]: With dead ends: 105 [2021-11-20 23:37:28,682 INFO L226 Difference]: Without dead ends: 95 [2021-11-20 23:37:28,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 80 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-11-20 23:37:28,688 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:28,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 147 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:37:28,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-20 23:37:28,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-11-20 23:37:28,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 58 states have internal predecessors, (61), 27 states have call successors, (27), 13 states have call predecessors, (27), 13 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-20 23:37:28,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2021-11-20 23:37:28,722 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 35 [2021-11-20 23:37:28,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:28,725 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2021-11-20 23:37:28,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 23:37:28,725 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2021-11-20 23:37:28,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 23:37:28,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:28,730 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:28,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 23:37:28,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-20 23:37:28,951 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:37:28,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:28,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1530726558, now seen corresponding path program 2 times [2021-11-20 23:37:28,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:28,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135098199] [2021-11-20 23:37:28,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:28,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:28,967 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:37:28,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [693904343] [2021-11-20 23:37:28,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:37:28,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:37:28,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:37:28,971 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:37:28,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 23:37:29,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 23:37:29,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:37:29,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 23:37:29,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:37:29,576 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 23:37:29,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:37:30,023 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 23:37:30,023 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:30,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135098199] [2021-11-20 23:37:30,024 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:37:30,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693904343] [2021-11-20 23:37:30,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693904343] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:37:30,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [631950208] [2021-11-20 23:37:30,031 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-20 23:37:30,031 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:37:30,031 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:37:30,032 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:37:30,032 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:37:42,374 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2021-11-20 23:37:42,465 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 53 for LOIs [2021-11-20 23:37:42,557 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:37:44,238 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:37:44,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:37:44,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-11-20 23:37:44,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490352794] [2021-11-20 23:37:44,238 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:37:44,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 23:37:44,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:44,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 23:37:44,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-11-20 23:37:44,241 INFO L87 Difference]: Start difference. First operand 95 states and 112 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-20 23:37:46,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:46,159 INFO L93 Difference]: Finished difference Result 105 states and 121 transitions. [2021-11-20 23:37:46,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 23:37:46,160 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 37 [2021-11-20 23:37:46,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:46,162 INFO L225 Difference]: With dead ends: 105 [2021-11-20 23:37:46,162 INFO L226 Difference]: Without dead ends: 103 [2021-11-20 23:37:46,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-11-20 23:37:46,164 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 23 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:46,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 187 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 23:37:46,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-20 23:37:46,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-11-20 23:37:46,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 64 states have internal predecessors, (67), 27 states have call successors, (27), 15 states have call predecessors, (27), 15 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-20 23:37:46,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2021-11-20 23:37:46,185 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 37 [2021-11-20 23:37:46,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:46,185 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2021-11-20 23:37:46,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-20 23:37:46,186 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2021-11-20 23:37:46,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 23:37:46,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:46,187 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:46,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 23:37:46,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 23:37:46,411 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:37:46,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:46,412 INFO L85 PathProgramCache]: Analyzing trace with hash -333653004, now seen corresponding path program 3 times [2021-11-20 23:37:46,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:46,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268012124] [2021-11-20 23:37:46,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:46,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:46,423 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:37:46,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [730989431] [2021-11-20 23:37:46,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 23:37:46,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:37:46,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:37:46,426 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:37:46,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 23:37:46,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 23:37:46,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:37:46,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-20 23:37:46,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:37:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-20 23:37:47,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:37:47,752 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 23:37:47,752 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:47,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268012124] [2021-11-20 23:37:47,753 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:37:47,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730989431] [2021-11-20 23:37:47,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730989431] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:37:47,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [742162061] [2021-11-20 23:37:47,755 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-20 23:37:47,755 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:37:47,756 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:37:47,756 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:37:47,756 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:38:00,989 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2021-11-20 23:38:01,084 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 53 for LOIs [2021-11-20 23:38:01,174 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:38:03,158 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:38:03,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:38:03,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-11-20 23:38:03,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489419383] [2021-11-20 23:38:03,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:38:03,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 23:38:03,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:38:03,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 23:38:03,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-11-20 23:38:03,161 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand has 15 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 8 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-20 23:38:05,639 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 23:38:06,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:06,232 INFO L93 Difference]: Finished difference Result 120 states and 136 transitions. [2021-11-20 23:38:06,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 23:38:06,233 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 8 states have call predecessors, (14), 5 states have call successors, (14) Word has length 42 [2021-11-20 23:38:06,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:06,235 INFO L225 Difference]: With dead ends: 120 [2021-11-20 23:38:06,235 INFO L226 Difference]: Without dead ends: 108 [2021-11-20 23:38:06,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 23:38:06,237 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 39 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 73 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:06,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 142 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 216 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 23:38:06,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-20 23:38:06,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2021-11-20 23:38:06,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 64 states have internal predecessors, (67), 22 states have call successors, (22), 16 states have call predecessors, (22), 15 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-20 23:38:06,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2021-11-20 23:38:06,252 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 42 [2021-11-20 23:38:06,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:06,253 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2021-11-20 23:38:06,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 8 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-20 23:38:06,253 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2021-11-20 23:38:06,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-20 23:38:06,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:06,254 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:38:06,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 23:38:06,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:38:06,472 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:38:06,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:06,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1884634751, now seen corresponding path program 1 times [2021-11-20 23:38:06,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:38:06,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608417613] [2021-11-20 23:38:06,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:06,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:38:06,480 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:38:06,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [257449393] [2021-11-20 23:38:06,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:06,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:38:06,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:38:06,482 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:38:06,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 23:38:06,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:06,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 23:38:06,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:38:06,705 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 23:38:06,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:38:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 23:38:06,921 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:38:06,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608417613] [2021-11-20 23:38:06,921 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:38:06,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257449393] [2021-11-20 23:38:06,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257449393] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:38:06,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [829664828] [2021-11-20 23:38:06,924 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-20 23:38:06,924 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:38:06,925 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:38:06,925 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:38:06,925 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:38:18,081 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2021-11-20 23:38:18,156 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 53 for LOIs [2021-11-20 23:38:18,230 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:38:20,397 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:38:20,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:38:20,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-11-20 23:38:20,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120072064] [2021-11-20 23:38:20,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:38:20,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 23:38:20,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:38:20,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 23:38:20,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-11-20 23:38:20,400 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand has 11 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-20 23:38:20,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:20,575 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2021-11-20 23:38:20,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 23:38:20,576 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 53 [2021-11-20 23:38:20,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:20,577 INFO L225 Difference]: With dead ends: 106 [2021-11-20 23:38:20,578 INFO L226 Difference]: Without dead ends: 86 [2021-11-20 23:38:20,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-11-20 23:38:20,579 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 16 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:20,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 117 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:38:20,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-20 23:38:20,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-11-20 23:38:20,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 54 states have (on average 1.037037037037037) internal successors, (56), 55 states have internal predecessors, (56), 18 states have call successors, (18), 13 states have call predecessors, (18), 13 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-20 23:38:20,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 91 transitions. [2021-11-20 23:38:20,602 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 91 transitions. Word has length 53 [2021-11-20 23:38:20,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:20,603 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 91 transitions. [2021-11-20 23:38:20,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-20 23:38:20,603 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 91 transitions. [2021-11-20 23:38:20,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-20 23:38:20,604 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:20,604 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:38:20,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 23:38:20,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:38:20,805 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:38:20,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:20,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1445886962, now seen corresponding path program 4 times [2021-11-20 23:38:20,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:38:20,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481811644] [2021-11-20 23:38:20,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:20,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:38:20,822 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:38:20,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1052833595] [2021-11-20 23:38:20,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 23:38:20,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:38:20,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:38:20,823 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:38:20,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 23:38:20,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:20,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-20 23:38:20,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:38:23,819 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 51 proven. 74 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-20 23:38:23,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:38:24,633 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 76 proven. 8 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-11-20 23:38:24,633 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:38:24,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481811644] [2021-11-20 23:38:24,634 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:38:24,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052833595] [2021-11-20 23:38:24,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052833595] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:38:24,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [219358855] [2021-11-20 23:38:24,636 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-20 23:38:24,636 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:38:24,636 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:38:24,637 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:38:24,637 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:38:36,893 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2021-11-20 23:38:36,987 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 53 for LOIs [2021-11-20 23:38:37,069 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:38:38,988 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:38:38,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:38:38,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-11-20 23:38:38,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409314420] [2021-11-20 23:38:38,989 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:38:38,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 23:38:38,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:38:38,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 23:38:38,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-11-20 23:38:38,991 INFO L87 Difference]: Start difference. First operand 86 states and 91 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) [2021-11-20 23:38:42,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:42,350 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2021-11-20 23:38:42,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 23:38:42,351 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) Word has length 73 [2021-11-20 23:38:42,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:42,352 INFO L225 Difference]: With dead ends: 96 [2021-11-20 23:38:42,352 INFO L226 Difference]: Without dead ends: 94 [2021-11-20 23:38:42,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 186 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 23:38:42,353 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 38 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:42,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 155 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-20 23:38:42,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-20 23:38:42,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2021-11-20 23:38:42,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 58 states have internal predecessors, (59), 18 states have call successors, (18), 14 states have call predecessors, (18), 14 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-20 23:38:42,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2021-11-20 23:38:42,368 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 73 [2021-11-20 23:38:42,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:42,368 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2021-11-20 23:38:42,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) [2021-11-20 23:38:42,368 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2021-11-20 23:38:42,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-20 23:38:42,370 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:42,370 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:38:42,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 23:38:42,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 23:38:42,570 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:38:42,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:42,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1678794748, now seen corresponding path program 2 times [2021-11-20 23:38:42,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:38:42,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617294026] [2021-11-20 23:38:42,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:42,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:38:42,578 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:38:42,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570741435] [2021-11-20 23:38:42,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:38:42,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:38:42,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:38:42,590 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:38:42,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 23:38:43,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-20 23:38:43,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:38:43,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 23:38:43,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:38:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 24 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-20 23:38:43,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:38:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2021-11-20 23:38:43,672 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:38:43,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617294026] [2021-11-20 23:38:43,672 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:38:43,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570741435] [2021-11-20 23:38:43,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570741435] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:38:43,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2089730791] [2021-11-20 23:38:43,674 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2021-11-20 23:38:43,675 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:38:43,675 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:38:43,675 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:38:43,675 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:38:57,299 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2021-11-20 23:38:57,362 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 53 for LOIs [2021-11-20 23:38:57,432 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:38:58,633 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:38:58,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:38:58,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-11-20 23:38:58,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657880778] [2021-11-20 23:38:58,634 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:38:58,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 23:38:58,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:38:58,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 23:38:58,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2021-11-20 23:38:58,636 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2021-11-20 23:38:58,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:59,000 INFO L93 Difference]: Finished difference Result 212 states and 223 transitions. [2021-11-20 23:38:59,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 23:38:59,000 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) Word has length 86 [2021-11-20 23:38:59,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:59,004 INFO L225 Difference]: With dead ends: 212 [2021-11-20 23:38:59,004 INFO L226 Difference]: Without dead ends: 198 [2021-11-20 23:38:59,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=287, Invalid=1195, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 23:38:59,006 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 55 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:59,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 275 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:38:59,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-20 23:38:59,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2021-11-20 23:38:59,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 130 states have internal predecessors, (131), 36 states have call successors, (36), 32 states have call predecessors, (36), 32 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-11-20 23:38:59,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 202 transitions. [2021-11-20 23:38:59,046 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 202 transitions. Word has length 86 [2021-11-20 23:38:59,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:59,048 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 202 transitions. [2021-11-20 23:38:59,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2021-11-20 23:38:59,049 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 202 transitions. [2021-11-20 23:38:59,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-20 23:38:59,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:59,054 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 30, 11, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:38:59,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 23:38:59,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 23:38:59,260 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:38:59,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:59,261 INFO L85 PathProgramCache]: Analyzing trace with hash -926531660, now seen corresponding path program 3 times [2021-11-20 23:38:59,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:38:59,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232842717] [2021-11-20 23:38:59,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:59,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:38:59,271 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:38:59,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112238553] [2021-11-20 23:38:59,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 23:38:59,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:38:59,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:38:59,272 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:38:59,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 23:38:59,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 23:38:59,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:38:59,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 23:38:59,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:38:59,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2092 backedges. 60 proven. 1910 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-20 23:38:59,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:39:00,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2092 backedges. 60 proven. 290 refuted. 0 times theorem prover too weak. 1742 trivial. 0 not checked. [2021-11-20 23:39:00,355 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:39:00,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232842717] [2021-11-20 23:39:00,355 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:39:00,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112238553] [2021-11-20 23:39:00,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112238553] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:39:00,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2063684930] [2021-11-20 23:39:00,357 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2021-11-20 23:39:00,358 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:39:00,358 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:39:00,358 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:39:00,358 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:39:15,076 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2021-11-20 23:39:15,156 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 53 for LOIs [2021-11-20 23:39:15,234 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:39:16,886 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:39:16,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:39:16,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-11-20 23:39:16,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049483040] [2021-11-20 23:39:16,887 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:39:16,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 23:39:16,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:39:16,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 23:39:16,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=1168, Unknown=0, NotChecked=0, Total=1560 [2021-11-20 23:39:16,890 INFO L87 Difference]: Start difference. First operand 198 states and 202 transitions. Second operand has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 21 states have call successors, (65), 13 states have call predecessors, (65), 12 states have return successors, (64), 20 states have call predecessors, (64), 20 states have call successors, (64) [2021-11-20 23:39:17,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:39:17,710 INFO L93 Difference]: Finished difference Result 392 states and 407 transitions. [2021-11-20 23:39:17,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-20 23:39:17,710 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 21 states have call successors, (65), 13 states have call predecessors, (65), 12 states have return successors, (64), 20 states have call predecessors, (64), 20 states have call successors, (64) Word has length 194 [2021-11-20 23:39:17,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:39:17,714 INFO L225 Difference]: With dead ends: 392 [2021-11-20 23:39:17,714 INFO L226 Difference]: Without dead ends: 378 [2021-11-20 23:39:17,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 541 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=821, Invalid=2601, Unknown=0, NotChecked=0, Total=3422 [2021-11-20 23:39:17,716 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 151 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:39:17,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 343 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:39:17,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-11-20 23:39:17,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2021-11-20 23:39:17,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 249 states have (on average 1.0080321285140563) internal successors, (251), 250 states have internal predecessors, (251), 66 states have call successors, (66), 62 states have call predecessors, (66), 62 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2021-11-20 23:39:17,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 382 transitions. [2021-11-20 23:39:17,784 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 382 transitions. Word has length 194 [2021-11-20 23:39:17,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:39:17,784 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 382 transitions. [2021-11-20 23:39:17,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 21 states have call successors, (65), 13 states have call predecessors, (65), 12 states have return successors, (64), 20 states have call predecessors, (64), 20 states have call successors, (64) [2021-11-20 23:39:17,785 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 382 transitions. [2021-11-20 23:39:17,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-11-20 23:39:17,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:39:17,793 INFO L514 BasicCegarLoop]: trace histogram [61, 60, 60, 21, 20, 20, 20, 20, 20, 20, 20, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:39:17,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 23:39:18,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:39:18,007 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:39:18,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:39:18,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1809623932, now seen corresponding path program 4 times [2021-11-20 23:39:18,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:39:18,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566082861] [2021-11-20 23:39:18,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:39:18,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:39:18,028 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:39:18,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1214429401] [2021-11-20 23:39:18,035 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 23:39:18,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:39:18,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:39:18,040 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:39:18,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 23:39:18,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 23:39:18,365 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 23:39:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 23:39:18,853 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-20 23:39:18,854 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-20 23:39:18,855 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 23:39:18,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 23:39:19,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 23:39:19,087 INFO L732 BasicCegarLoop]: Path program histogram: [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:39:19,091 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 23:39:19,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 11:39:19 BoogieIcfgContainer [2021-11-20 23:39:19,302 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 23:39:19,303 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 23:39:19,303 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 23:39:19,303 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 23:39:19,303 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:36:59" (3/4) ... [2021-11-20 23:39:19,306 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-20 23:39:19,486 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/bin/utaipan-TEXQjIfE4P/witness.graphml [2021-11-20 23:39:19,487 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 23:39:19,487 INFO L158 Benchmark]: Toolchain (without parser) took 140870.66ms. Allocated memory was 94.4MB in the beginning and 163.6MB in the end (delta: 69.2MB). Free memory was 60.0MB in the beginning and 52.9MB in the end (delta: 7.2MB). Peak memory consumption was 77.3MB. Max. memory is 16.1GB. [2021-11-20 23:39:19,488 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 94.4MB. Free memory is still 48.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:39:19,488 INFO L158 Benchmark]: CACSL2BoogieTranslator took 331.46ms. Allocated memory is still 94.4MB. Free memory was 59.9MB in the beginning and 68.9MB in the end (delta: -9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 23:39:19,489 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.27ms. Allocated memory is still 94.4MB. Free memory was 68.9MB in the beginning and 67.3MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 23:39:19,489 INFO L158 Benchmark]: Boogie Preprocessor took 32.25ms. Allocated memory is still 94.4MB. Free memory was 67.3MB in the beginning and 66.2MB in the end (delta: 1.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-20 23:39:19,489 INFO L158 Benchmark]: RCFGBuilder took 494.35ms. Allocated memory is still 94.4MB. Free memory was 66.2MB in the beginning and 55.5MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 23:39:19,490 INFO L158 Benchmark]: TraceAbstraction took 139773.47ms. Allocated memory was 94.4MB in the beginning and 163.6MB in the end (delta: 69.2MB). Free memory was 54.9MB in the beginning and 68.6MB in the end (delta: -13.7MB). Peak memory consumption was 57.2MB. Max. memory is 16.1GB. [2021-11-20 23:39:19,490 INFO L158 Benchmark]: Witness Printer took 184.34ms. Allocated memory is still 163.6MB. Free memory was 68.6MB in the beginning and 52.9MB in the end (delta: 15.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-20 23:39:19,501 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 94.4MB. Free memory is still 48.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 331.46ms. Allocated memory is still 94.4MB. Free memory was 59.9MB in the beginning and 68.9MB in the end (delta: -9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.27ms. Allocated memory is still 94.4MB. Free memory was 68.9MB in the beginning and 67.3MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 32.25ms. Allocated memory is still 94.4MB. Free memory was 67.3MB in the beginning and 66.2MB in the end (delta: 1.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 494.35ms. Allocated memory is still 94.4MB. Free memory was 66.2MB in the beginning and 55.5MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 139773.47ms. Allocated memory was 94.4MB in the beginning and 163.6MB in the end (delta: 69.2MB). Free memory was 54.9MB in the beginning and 68.6MB in the end (delta: -13.7MB). Peak memory consumption was 57.2MB. Max. memory is 16.1GB. * Witness Printer took 184.34ms. Allocated memory is still 163.6MB. Free memory was 68.6MB in the beginning and 52.9MB in the end (delta: 15.7MB). Peak memory consumption was 16.8MB. 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 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; [L20] long long a, b, p, q, r, s; [L21] int x, y; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(x >= 1) VAL [counter=0, x=9599, y=3646] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(y >= 1) VAL [counter=0, x=9599, y=3646] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [a=9599, b=3646, counter=0, p=1, q=0, r=0, s=1, x=9599, y=3646] [L34] EXPR counter++ VAL [a=9599, b=3646, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=9599, y=3646] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=9599, b=3646, counter=1, p=1, q=0, r=0, s=1, x=9599, y=3646] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=9599, b=3646, counter=1, p=1, q=0, r=0, s=1, x=9599, y=3646] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=9599, b=3646, counter=1, p=1, q=0, r=0, s=1, x=9599, y=3646] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=5953, b=3646, counter=1, p=1, q=0, r=-1, s=1, x=9599, y=3646] [L34] EXPR counter++ VAL [a=5953, b=3646, counter=2, counter++=1, p=1, q=0, r=-1, s=1, x=9599, y=3646] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=5953, b=3646, counter=2, p=1, q=0, r=-1, s=1, x=9599, y=3646] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=5953, b=3646, counter=2, p=1, q=0, r=-1, s=1, x=9599, y=3646] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=5953, b=3646, counter=2, p=1, q=0, r=-1, s=1, x=9599, y=3646] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=2307, b=3646, counter=2, p=1, q=0, r=-2, s=1, x=9599, y=3646] [L34] EXPR counter++ VAL [a=2307, b=3646, counter=3, counter++=2, p=1, q=0, r=-2, s=1, x=9599, y=3646] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=3] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=2307, b=3646, counter=3, p=1, q=0, r=-2, s=1, x=9599, y=3646] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=3] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=2307, b=3646, counter=3, p=1, q=0, r=-2, s=1, x=9599, y=3646] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=3] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=2307, b=3646, counter=3, p=1, q=0, r=-2, s=1, x=9599, y=3646] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=2307, b=1339, counter=3, p=1, q=-1, r=-2, s=3, x=9599, y=3646] [L34] EXPR counter++ VAL [a=2307, b=1339, counter=4, counter++=3, p=1, q=-1, r=-2, s=3, x=9599, y=3646] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=2307, b=1339, counter=4, p=1, q=-1, r=-2, s=3, x=9599, y=3646] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=2307, b=1339, counter=4, p=1, q=-1, r=-2, s=3, x=9599, y=3646] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=2307, b=1339, counter=4, p=1, q=-1, r=-2, s=3, x=9599, y=3646] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=968, b=1339, counter=4, p=2, q=-1, r=-5, s=3, x=9599, y=3646] [L34] EXPR counter++ VAL [a=968, b=1339, counter=5, counter++=4, p=2, q=-1, r=-5, s=3, x=9599, y=3646] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=968, b=1339, counter=5, p=2, q=-1, r=-5, s=3, x=9599, y=3646] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=968, b=1339, counter=5, p=2, q=-1, r=-5, s=3, x=9599, y=3646] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=968, b=1339, counter=5, p=2, q=-1, r=-5, s=3, x=9599, y=3646] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=968, b=371, counter=5, p=2, q=-3, r=-5, s=8, x=9599, y=3646] [L34] EXPR counter++ VAL [a=968, b=371, counter=6, counter++=5, p=2, q=-3, r=-5, s=8, x=9599, y=3646] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=6] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=968, b=371, counter=6, p=2, q=-3, r=-5, s=8, x=9599, y=3646] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=6] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=968, b=371, counter=6, p=2, q=-3, r=-5, s=8, x=9599, y=3646] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=6] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=968, b=371, counter=6, p=2, q=-3, r=-5, s=8, x=9599, y=3646] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=597, b=371, counter=6, p=5, q=-3, r=-13, s=8, x=9599, y=3646] [L34] EXPR counter++ VAL [a=597, b=371, counter=7, counter++=6, p=5, q=-3, r=-13, s=8, x=9599, y=3646] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=7] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=597, b=371, counter=7, p=5, q=-3, r=-13, s=8, x=9599, y=3646] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=7] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=597, b=371, counter=7, p=5, q=-3, r=-13, s=8, x=9599, y=3646] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=7] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=597, b=371, counter=7, p=5, q=-3, r=-13, s=8, x=9599, y=3646] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=226, b=371, counter=7, p=8, q=-3, r=-21, s=8, x=9599, y=3646] [L34] EXPR counter++ VAL [a=226, b=371, counter=8, counter++=7, p=8, q=-3, r=-21, s=8, x=9599, y=3646] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=8] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=226, b=371, counter=8, p=8, q=-3, r=-21, s=8, x=9599, y=3646] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=8] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=226, b=371, counter=8, p=8, q=-3, r=-21, s=8, x=9599, y=3646] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=8] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=226, b=371, counter=8, p=8, q=-3, r=-21, s=8, x=9599, y=3646] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=226, b=145, counter=8, p=8, q=-11, r=-21, s=29, x=9599, y=3646] [L34] EXPR counter++ VAL [a=226, b=145, counter=9, counter++=8, p=8, q=-11, r=-21, s=29, x=9599, y=3646] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=226, b=145, counter=9, p=8, q=-11, r=-21, s=29, x=9599, y=3646] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=226, b=145, counter=9, p=8, q=-11, r=-21, s=29, x=9599, y=3646] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=226, b=145, counter=9, p=8, q=-11, r=-21, s=29, x=9599, y=3646] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=81, b=145, counter=9, p=19, q=-11, r=-50, s=29, x=9599, y=3646] [L34] EXPR counter++ VAL [a=81, b=145, counter=10, counter++=9, p=19, q=-11, r=-50, s=29, x=9599, y=3646] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=10] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=81, b=145, counter=10, p=19, q=-11, r=-50, s=29, x=9599, y=3646] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=10] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=81, b=145, counter=10, p=19, q=-11, r=-50, s=29, x=9599, y=3646] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=10] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=81, b=145, counter=10, p=19, q=-11, r=-50, s=29, x=9599, y=3646] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=81, b=64, counter=10, p=19, q=-30, r=-50, s=79, x=9599, y=3646] [L34] EXPR counter++ VAL [a=81, b=64, counter=11, counter++=10, p=19, q=-30, r=-50, s=79, x=9599, y=3646] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=11] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=11] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=81, b=64, counter=11, p=19, q=-30, r=-50, s=79, x=9599, y=3646] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=11] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=11] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=81, b=64, counter=11, p=19, q=-30, r=-50, s=79, x=9599, y=3646] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=11] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=11] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=81, b=64, counter=11, p=19, q=-30, r=-50, s=79, x=9599, y=3646] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=17, b=64, counter=11, p=49, q=-30, r=-129, s=79, x=9599, y=3646] [L34] EXPR counter++ VAL [a=17, b=64, counter=12, counter++=11, p=49, q=-30, r=-129, s=79, x=9599, y=3646] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=12] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=12] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=17, b=64, counter=12, p=49, q=-30, r=-129, s=79, x=9599, y=3646] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=12] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=12] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=17, b=64, counter=12, p=49, q=-30, r=-129, s=79, x=9599, y=3646] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=12] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=12] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=17, b=64, counter=12, p=49, q=-30, r=-129, s=79, x=9599, y=3646] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=17, b=47, counter=12, p=49, q=-79, r=-129, s=208, x=9599, y=3646] [L34] EXPR counter++ VAL [a=17, b=47, counter=13, counter++=12, p=49, q=-79, r=-129, s=208, x=9599, y=3646] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=13] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=17, b=47, counter=13, p=49, q=-79, r=-129, s=208, x=9599, y=3646] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=13] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=17, b=47, counter=13, p=49, q=-79, r=-129, s=208, x=9599, y=3646] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=13] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=17, b=47, counter=13, p=49, q=-79, r=-129, s=208, x=9599, y=3646] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=17, b=30, counter=13, p=49, q=-128, r=-129, s=337, x=9599, y=3646] [L34] EXPR counter++ VAL [a=17, b=30, counter=14, counter++=13, p=49, q=-128, r=-129, s=337, x=9599, y=3646] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=14] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=14] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=17, b=30, counter=14, p=49, q=-128, r=-129, s=337, x=9599, y=3646] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=14] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=14] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=17, b=30, counter=14, p=49, q=-128, r=-129, s=337, x=9599, y=3646] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=14] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=14] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=17, b=30, counter=14, p=49, q=-128, r=-129, s=337, x=9599, y=3646] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=17, b=13, counter=14, p=49, q=-177, r=-129, s=466, x=9599, y=3646] [L34] EXPR counter++ VAL [a=17, b=13, counter=15, counter++=14, p=49, q=-177, r=-129, s=466, x=9599, y=3646] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=15] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=15] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=17, b=13, counter=15, p=49, q=-177, r=-129, s=466, x=9599, y=3646] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=15] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=15] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=17, b=13, counter=15, p=49, q=-177, r=-129, s=466, x=9599, y=3646] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=15] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=15] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=17, b=13, counter=15, p=49, q=-177, r=-129, s=466, x=9599, y=3646] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=4, b=13, counter=15, p=226, q=-177, r=-595, s=466, x=9599, y=3646] [L34] EXPR counter++ VAL [a=4, b=13, counter=16, counter++=15, p=226, q=-177, r=-595, s=466, x=9599, y=3646] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=16] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=16] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=4, b=13, counter=16, p=226, q=-177, r=-595, s=466, x=9599, y=3646] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=16] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=16] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=4, b=13, counter=16, p=226, q=-177, r=-595, s=466, x=9599, y=3646] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=16] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=16] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=4, b=13, counter=16, p=226, q=-177, r=-595, s=466, x=9599, y=3646] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=4, b=9, counter=16, p=226, q=-403, r=-595, s=1061, x=9599, y=3646] [L34] EXPR counter++ VAL [a=4, b=9, counter=17, counter++=16, p=226, q=-403, r=-595, s=1061, x=9599, y=3646] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=17] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=4, b=9, counter=17, p=226, q=-403, r=-595, s=1061, x=9599, y=3646] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=17] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=4, b=9, counter=17, p=226, q=-403, r=-595, s=1061, x=9599, y=3646] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=17] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=4, b=9, counter=17, p=226, q=-403, r=-595, s=1061, x=9599, y=3646] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=4, b=5, counter=17, p=226, q=-629, r=-595, s=1656, x=9599, y=3646] [L34] EXPR counter++ VAL [a=4, b=5, counter=18, counter++=17, p=226, q=-629, r=-595, s=1656, x=9599, y=3646] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=18] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=18] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=4, b=5, counter=18, p=226, q=-629, r=-595, s=1656, x=9599, y=3646] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=18] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=18] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=4, b=5, counter=18, p=226, q=-629, r=-595, s=1656, x=9599, y=3646] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=18] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=18] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=4, b=5, counter=18, p=226, q=-629, r=-595, s=1656, x=9599, y=3646] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=4, b=1, counter=18, p=226, q=-855, r=-595, s=2251, x=9599, y=3646] [L34] EXPR counter++ VAL [a=4, b=1, counter=19, counter++=18, p=226, q=-855, r=-595, s=2251, x=9599, y=3646] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=19] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=19] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=4, b=1, counter=19, p=226, q=-855, r=-595, s=2251, x=9599, y=3646] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=19] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=19] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=4, b=1, counter=19, p=226, q=-855, r=-595, s=2251, x=9599, y=3646] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=19] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=19] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=4, b=1, counter=19, p=226, q=-855, r=-595, s=2251, x=9599, y=3646] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=3, b=1, counter=19, p=1081, q=-855, r=-2846, s=2251, x=9599, y=3646] [L34] EXPR counter++ VAL [a=3, b=1, counter=20, counter++=19, p=1081, q=-855, r=-2846, s=2251, x=9599, y=3646] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=20] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=20] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=3, b=1, counter=20, p=1081, q=-855, r=-2846, s=2251, x=9599, y=3646] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=20] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=20] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=3, b=1, counter=20, p=1081, q=-855, r=-2846, s=2251, x=9599, y=3646] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=20] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=20] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=3, b=1, counter=20, p=1081, q=-855, r=-2846, s=2251, x=9599, y=3646] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=2, b=1, counter=20, p=1936, q=-855, r=-5097, s=2251, x=9599, y=3646] [L34] EXPR counter++ VAL [a=2, b=1, counter=21, counter++=20, p=1936, q=-855, r=-5097, s=2251, x=9599, y=3646] [L34] COND FALSE !(counter++<20) [L53] CALL __VERIFIER_assert(a - b == 0) VAL [\old(cond)=0, counter=21] [L11] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=21] [L13] reach_error() VAL [\old(cond)=0, cond=0, counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 139.5s, OverallIterations: 16, TraceHistogramMax: 61, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.1s, AutomataDifference: 11.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 460 SdHoareTripleChecker+Valid, 5.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 418 mSDsluCounter, 2143 SdHoareTripleChecker+Invalid, 5.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1750 mSDsCounter, 382 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1602 IncrementalHoareTripleChecker+Invalid, 1985 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 382 mSolverCounterUnsat, 503 mSDtfsCounter, 1602 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1871 GetRequests, 1566 SyntacticMatches, 17 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2810 ImplicationChecksByTransitivity, 19.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=378occurred in iteration=15, InterpolantAutomatonStates: 166, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 15 MinimizatonAttempts, 23 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 10.1s InterpolantComputationTime, 1072 NumberOfCodeBlocks, 1049 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 1281 ConstructedInterpolants, 0 QuantifiedInterpolants, 6290 SizeOfPredicates, 56 NumberOfNonLiveVariables, 1798 ConjunctsInSsa, 216 ConjunctsInUnsatCore, 25 InterpolantComputations, 7 PerfectInterpolantSequences, 3284/5926 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: OVERALL_TIME: 2.9s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 3, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 23, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 14, TOOLS_POST_TIME: 0.7s, TOOLS_POST_CALL_APPLICATIONS: 19, TOOLS_POST_CALL_TIME: 1.0s, TOOLS_POST_RETURN_APPLICATIONS: 12, TOOLS_POST_RETURN_TIME: 1.1s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 45, TOOLS_QUANTIFIERELIM_TIME: 2.7s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 58, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 23, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 23, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 12, CALL_SUMMARIZER_CACHE_MISSES: 2, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 263, DAG_COMPRESSION_RETAINED_NODES: 62, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-20 23:39:19,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b53f9b7-83ca-432f-b7cf-750b34504971/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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE