./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8a7308dc5f86f1f4eda090a45a8f84359680ddfad7d17e2c5273bd494b2cbe5e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:15:07,988 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:15:07,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:15:08,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:15:08,020 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:15:08,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:15:08,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:15:08,026 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:15:08,028 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:15:08,029 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:15:08,030 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:15:08,032 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:15:08,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:15:08,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:15:08,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:15:08,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:15:08,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:15:08,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:15:08,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:15:08,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:15:08,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:15:08,047 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:15:08,049 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:15:08,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:15:08,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:15:08,054 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:15:08,054 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:15:08,055 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:15:08,056 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:15:08,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:15:08,057 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:15:08,058 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:15:08,059 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:15:08,060 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:15:08,061 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:15:08,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:15:08,062 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:15:08,063 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:15:08,063 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:15:08,064 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:15:08,065 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:15:08,065 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:15:08,091 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:15:08,091 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:15:08,092 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:15:08,092 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:15:08,093 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:15:08,093 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:15:08,093 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:15:08,093 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:15:08,093 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:15:08,094 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:15:08,094 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:15:08,094 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:15:08,094 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:15:08,095 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:15:08,095 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:15:08,095 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:15:08,095 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:15:08,096 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:15:08,096 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:15:08,097 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:15:08,097 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:15:08,097 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:15:08,097 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:15:08,097 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:15:08,098 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:15:08,098 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:15:08,098 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:15:08,098 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:15:08,099 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:15:08,099 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:15:08,099 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:15:08,099 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:15:08,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:15:08,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:15:08,100 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:15:08,100 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:15:08,100 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:15:08,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:15:08,101 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:15:08,101 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:15:08,101 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:15:08,101 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_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a7308dc5f86f1f4eda090a45a8f84359680ddfad7d17e2c5273bd494b2cbe5e [2021-11-23 02:15:08,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:15:08,419 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:15:08,422 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:15:08,423 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:15:08,425 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:15:08,426 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c [2021-11-23 02:15:08,511 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/data/d84b841f1/d03d7e5460234d7f9ed1de156d0ba686/FLAG6266b3d2f [2021-11-23 02:15:08,952 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:15:08,953 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c [2021-11-23 02:15:08,980 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/data/d84b841f1/d03d7e5460234d7f9ed1de156d0ba686/FLAG6266b3d2f [2021-11-23 02:15:09,298 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/data/d84b841f1/d03d7e5460234d7f9ed1de156d0ba686 [2021-11-23 02:15:09,301 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:15:09,302 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:15:09,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:15:09,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:15:09,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:15:09,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:15:09" (1/1) ... [2021-11-23 02:15:09,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@412952ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:09, skipping insertion in model container [2021-11-23 02:15:09,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:15:09" (1/1) ... [2021-11-23 02:15:09,317 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:15:09,373 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:15:09,680 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_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c[12131,12144] [2021-11-23 02:15:09,691 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:15:09,701 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:15:09,780 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_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c[12131,12144] [2021-11-23 02:15:09,794 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:15:09,809 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:15:09,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:09 WrapperNode [2021-11-23 02:15:09,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:15:09,811 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:15:09,811 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:15:09,811 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:15:09,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:09" (1/1) ... [2021-11-23 02:15:09,830 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:09" (1/1) ... [2021-11-23 02:15:09,898 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 548 [2021-11-23 02:15:09,898 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:15:09,899 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:15:09,899 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:15:09,899 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:15:09,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:09" (1/1) ... [2021-11-23 02:15:09,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:09" (1/1) ... [2021-11-23 02:15:09,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:09" (1/1) ... [2021-11-23 02:15:09,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:09" (1/1) ... [2021-11-23 02:15:09,931 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:09" (1/1) ... [2021-11-23 02:15:09,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:09" (1/1) ... [2021-11-23 02:15:09,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:09" (1/1) ... [2021-11-23 02:15:09,968 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:15:09,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:15:09,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:15:09,978 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:15:09,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:09" (1/1) ... [2021-11-23 02:15:09,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:15:09,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:15:10,014 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:15:10,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:15:10,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:15:10,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:15:10,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:15:10,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:15:10,194 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:15:10,195 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:15:10,560 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:15:10,579 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:15:10,580 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:15:10,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:15:10 BoogieIcfgContainer [2021-11-23 02:15:10,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:15:10,584 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:15:10,584 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:15:10,588 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:15:10,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:15:09" (1/3) ... [2021-11-23 02:15:10,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a7c6863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:15:10, skipping insertion in model container [2021-11-23 02:15:10,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:15:09" (2/3) ... [2021-11-23 02:15:10,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a7c6863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:15:10, skipping insertion in model container [2021-11-23 02:15:10,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:15:10" (3/3) ... [2021-11-23 02:15:10,591 INFO L111 eAbstractionObserver]: Analyzing ICFG zonotope_3.c.v+lhb-reducer.c [2021-11-23 02:15:10,596 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:15:10,596 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:15:10,642 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:15:10,649 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:15:10,649 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:15:10,664 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 50 states have (on average 1.88) internal successors, (94), 51 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:15:10,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-23 02:15:10,671 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:15:10,672 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:15:10,673 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:15:10,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:15:10,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1601611879, now seen corresponding path program 1 times [2021-11-23 02:15:10,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:15:10,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901609715] [2021-11-23 02:15:10,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:10,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:15:10,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:15:11,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:15:11,081 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:15:11,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901609715] [2021-11-23 02:15:11,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901609715] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:15:11,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:15:11,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:15:11,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937478270] [2021-11-23 02:15:11,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:15:11,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:15:11,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:15:11,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:15:11,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:15:11,120 INFO L87 Difference]: Start difference. First operand has 52 states, 50 states have (on average 1.88) internal successors, (94), 51 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:15:11,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:15:11,221 INFO L93 Difference]: Finished difference Result 64 states and 103 transitions. [2021-11-23 02:15:11,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:15:11,224 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-23 02:15:11,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:15:11,232 INFO L225 Difference]: With dead ends: 64 [2021-11-23 02:15:11,233 INFO L226 Difference]: Without dead ends: 50 [2021-11-23 02:15:11,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:15:11,239 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 93 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:15:11,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 262 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:15:11,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-23 02:15:11,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-23 02:15:11,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:15:11,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2021-11-23 02:15:11,274 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 44 [2021-11-23 02:15:11,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:15:11,275 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2021-11-23 02:15:11,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:15:11,275 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2021-11-23 02:15:11,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-23 02:15:11,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:15:11,277 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:15:11,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:15:11,278 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:15:11,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:15:11,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1584601218, now seen corresponding path program 1 times [2021-11-23 02:15:11,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:15:11,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39595073] [2021-11-23 02:15:11,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:11,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:15:11,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:15:11,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:15:11,516 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:15:11,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39595073] [2021-11-23 02:15:11,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39595073] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:15:11,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:15:11,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-23 02:15:11,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355568153] [2021-11-23 02:15:11,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:15:11,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 02:15:11,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:15:11,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 02:15:11,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:15:11,526 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:15:11,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:15:11,626 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2021-11-23 02:15:11,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:15:11,627 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-23 02:15:11,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:15:11,633 INFO L225 Difference]: With dead ends: 63 [2021-11-23 02:15:11,633 INFO L226 Difference]: Without dead ends: 56 [2021-11-23 02:15:11,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:15:11,640 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 51 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:15:11,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 114 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:15:11,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-23 02:15:11,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2021-11-23 02:15:11,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:15:11,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-11-23 02:15:11,649 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 44 [2021-11-23 02:15:11,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:15:11,653 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-11-23 02:15:11,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:15:11,654 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-11-23 02:15:11,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-23 02:15:11,659 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:15:11,659 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:15:11,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:15:11,660 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:15:11,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:15:11,667 INFO L85 PathProgramCache]: Analyzing trace with hash 902581852, now seen corresponding path program 1 times [2021-11-23 02:15:11,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:15:11,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392583733] [2021-11-23 02:15:11,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:11,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:15:11,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:15:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:15:11,802 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:15:11,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392583733] [2021-11-23 02:15:11,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392583733] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:15:11,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:15:11,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:15:11,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848484109] [2021-11-23 02:15:11,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:15:11,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:15:11,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:15:11,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:15:11,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:15:11,805 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:15:11,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:15:11,822 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2021-11-23 02:15:11,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:15:11,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-23 02:15:11,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:15:11,828 INFO L225 Difference]: With dead ends: 66 [2021-11-23 02:15:11,828 INFO L226 Difference]: Without dead ends: 51 [2021-11-23 02:15:11,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:15:11,833 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:15:11,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:15:11,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-23 02:15:11,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-23 02:15:11,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:15:11,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-11-23 02:15:11,840 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 49 [2021-11-23 02:15:11,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:15:11,840 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-11-23 02:15:11,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:15:11,845 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-11-23 02:15:11,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-23 02:15:11,847 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:15:11,848 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:15:11,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:15:11,848 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:15:11,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:15:11,850 INFO L85 PathProgramCache]: Analyzing trace with hash 449992577, now seen corresponding path program 1 times [2021-11-23 02:15:11,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:15:11,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402032537] [2021-11-23 02:15:11,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:11,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:15:11,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:15:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:15:12,035 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:15:12,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402032537] [2021-11-23 02:15:12,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402032537] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:15:12,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350312306] [2021-11-23 02:15:12,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:12,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:15:12,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:15:12,046 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:15:12,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:15:12,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:15:12,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:15:12,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:15:12,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:15:12,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:15:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:15:12,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350312306] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:15:12,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [338599402] [2021-11-23 02:15:12,856 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2021-11-23 02:15:12,857 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:15:12,861 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:15:12,867 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:15:12,867 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:15:17,725 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:15:32,476 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '789#(and (<= 0.0 |ULTIMATE.start_main_~g__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~g__x~20#1|) (= (/ 3.0 4.0) |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (= |ULTIMATE.start_main_~__tmp_43~0#1| |ULTIMATE.start_main_~f__x~21#1|) (<= |ULTIMATE.start_main_~g__x~0#1| 0.0) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1|) (= ~__return_120502~0 0) (= ~__return_120477~0 |ULTIMATE.start_main_~main__z~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~3#1| 1) (= ~__return_120481~0 |ULTIMATE.start_main_~main__u~0#1|) (<= |ULTIMATE.start_main_~f__x~0#1| 0.0) (= ~__tmp_120439_1~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~5#1| 1) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~2#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1| 1) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~main__u~0#1|) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~8#1|) (= (/ 1.0 4.0) |ULTIMATE.start_main_~__tmp_4~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 1) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0.0) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~g__x~1#1|) (<= (/ 3.0 4.0) |ULTIMATE.start_main_~f__x~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~4#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~f__x~20#1|) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~g__x~21#1|) (< 100000 |ULTIMATE.start_main_~main__i~0#1|) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (= ~__return_120486~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (<= 0.0 |ULTIMATE.start_main_~f__x~0#1|) (<= |ULTIMATE.start_main_~f__x~1#1| (/ 3.0 4.0)) (= |ULTIMATE.start_main_~__tmp_2~0#1| 0.0) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1|) (<= |ULTIMATE.start_main_~g__x~1#1| (/ 1.0 4.0)) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~6#1| 1) (= ~__return_120473~0 |ULTIMATE.start_main_~main__y~0#1|) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~7#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 02:15:32,477 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:15:32,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:15:32,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2021-11-23 02:15:32,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290156254] [2021-11-23 02:15:32,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:15:32,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 02:15:32,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:15:32,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 02:15:32,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=872, Invalid=2550, Unknown=0, NotChecked=0, Total=3422 [2021-11-23 02:15:32,481 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:15:32,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:15:32,656 INFO L93 Difference]: Finished difference Result 118 states and 131 transitions. [2021-11-23 02:15:32,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 02:15:32,657 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-23 02:15:32,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:15:32,665 INFO L225 Difference]: With dead ends: 118 [2021-11-23 02:15:32,665 INFO L226 Difference]: Without dead ends: 111 [2021-11-23 02:15:32,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2117 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=872, Invalid=2550, Unknown=0, NotChecked=0, Total=3422 [2021-11-23 02:15:32,675 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 226 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:15:32,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 127 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:15:32,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-23 02:15:32,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-11-23 02:15:32,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:15:32,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2021-11-23 02:15:32,694 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 49 [2021-11-23 02:15:32,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:15:32,695 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2021-11-23 02:15:32,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:15:32,695 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2021-11-23 02:15:32,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-23 02:15:32,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:15:32,703 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:15:32,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:15:32,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:15:32,926 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:15:32,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:15:32,926 INFO L85 PathProgramCache]: Analyzing trace with hash -844379071, now seen corresponding path program 2 times [2021-11-23 02:15:32,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:15:32,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433746953] [2021-11-23 02:15:32,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:32,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:15:32,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:15:33,312 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:15:33,312 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:15:33,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433746953] [2021-11-23 02:15:33,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433746953] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:15:33,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470363112] [2021-11-23 02:15:33,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:15:33,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:15:33,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:15:33,314 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:15:33,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:15:33,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-11-23 02:15:33,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:15:33,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 02:15:33,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:15:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:15:33,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:15:34,604 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:15:34,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470363112] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:15:34,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [380193556] [2021-11-23 02:15:34,608 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2021-11-23 02:15:34,608 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:15:34,609 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:15:34,609 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:15:34,609 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:15:37,750 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:15:52,386 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1809#(and (<= 0.0 |ULTIMATE.start_main_~g__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~g__x~20#1|) (= (/ 3.0 4.0) |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (= |ULTIMATE.start_main_~__tmp_43~0#1| |ULTIMATE.start_main_~f__x~21#1|) (<= |ULTIMATE.start_main_~g__x~0#1| 0.0) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1|) (= ~__return_120502~0 0) (= ~__return_120477~0 |ULTIMATE.start_main_~main__z~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~3#1| 1) (= ~__return_120481~0 |ULTIMATE.start_main_~main__u~0#1|) (<= |ULTIMATE.start_main_~f__x~0#1| 0.0) (= ~__tmp_120439_1~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~5#1| 1) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~2#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1| 1) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~main__u~0#1|) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~8#1|) (= (/ 1.0 4.0) |ULTIMATE.start_main_~__tmp_4~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 1) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0.0) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~g__x~1#1|) (<= (/ 3.0 4.0) |ULTIMATE.start_main_~f__x~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~4#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~f__x~20#1|) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~g__x~21#1|) (< 100000 |ULTIMATE.start_main_~main__i~0#1|) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (= ~__return_120486~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (<= 0.0 |ULTIMATE.start_main_~f__x~0#1|) (<= |ULTIMATE.start_main_~f__x~1#1| (/ 3.0 4.0)) (= |ULTIMATE.start_main_~__tmp_2~0#1| 0.0) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1|) (<= |ULTIMATE.start_main_~g__x~1#1| (/ 1.0 4.0)) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~6#1| 1) (= ~__return_120473~0 |ULTIMATE.start_main_~main__y~0#1|) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~7#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 02:15:52,387 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:15:52,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:15:52,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2021-11-23 02:15:52,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325211779] [2021-11-23 02:15:52,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:15:52,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-23 02:15:52,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:15:52,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-23 02:15:52,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2372, Invalid=4434, Unknown=0, NotChecked=0, Total=6806 [2021-11-23 02:15:52,393 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 49 states, 49 states have (on average 4.448979591836735) internal successors, (218), 48 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:15:52,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:15:52,651 INFO L93 Difference]: Finished difference Result 238 states and 263 transitions. [2021-11-23 02:15:52,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-23 02:15:52,652 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.448979591836735) internal successors, (218), 48 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-11-23 02:15:52,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:15:52,659 INFO L225 Difference]: With dead ends: 238 [2021-11-23 02:15:52,659 INFO L226 Difference]: Without dead ends: 231 [2021-11-23 02:15:52,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 266 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3773 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=2372, Invalid=4434, Unknown=0, NotChecked=0, Total=6806 [2021-11-23 02:15:52,663 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 364 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:15:52,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 229 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:15:52,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-23 02:15:52,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2021-11-23 02:15:52,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.008695652173913) internal successors, (232), 230 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:15:52,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions. [2021-11-23 02:15:52,710 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 109 [2021-11-23 02:15:52,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:15:52,711 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 232 transitions. [2021-11-23 02:15:52,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.448979591836735) internal successors, (218), 48 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:15:52,712 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions. [2021-11-23 02:15:52,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-23 02:15:52,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:15:52,717 INFO L514 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:15:52,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:15:52,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:15:52,933 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:15:52,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:15:52,934 INFO L85 PathProgramCache]: Analyzing trace with hash -588917311, now seen corresponding path program 3 times [2021-11-23 02:15:52,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:15:52,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580129477] [2021-11-23 02:15:52,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:52,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:15:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:15:54,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:15:54,248 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:15:54,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580129477] [2021-11-23 02:15:54,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580129477] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:15:54,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338904455] [2021-11-23 02:15:54,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:15:54,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:15:54,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:15:54,253 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:15:54,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:15:54,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:15:54,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:15:54,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 2018 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-23 02:15:54,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:15:55,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:15:55,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:15:57,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:15:57,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338904455] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:15:57,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1031126436] [2021-11-23 02:15:57,874 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2021-11-23 02:15:57,874 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:15:57,875 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:15:57,875 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:15:57,875 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:16:00,672 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:16:15,679 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3933#(and (<= 0.0 |ULTIMATE.start_main_~g__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~g__x~20#1|) (= (/ 3.0 4.0) |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (= |ULTIMATE.start_main_~__tmp_43~0#1| |ULTIMATE.start_main_~f__x~21#1|) (<= |ULTIMATE.start_main_~g__x~0#1| 0.0) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1|) (= ~__return_120502~0 0) (= ~__return_120477~0 |ULTIMATE.start_main_~main__z~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~3#1| 1) (= ~__return_120481~0 |ULTIMATE.start_main_~main__u~0#1|) (<= |ULTIMATE.start_main_~f__x~0#1| 0.0) (= ~__tmp_120439_1~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~5#1| 1) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~2#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1| 1) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~main__u~0#1|) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~8#1|) (= (/ 1.0 4.0) |ULTIMATE.start_main_~__tmp_4~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 1) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0.0) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~g__x~1#1|) (<= (/ 3.0 4.0) |ULTIMATE.start_main_~f__x~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~4#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~f__x~20#1|) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~g__x~21#1|) (< 100000 |ULTIMATE.start_main_~main__i~0#1|) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (= ~__return_120486~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (<= 0.0 |ULTIMATE.start_main_~f__x~0#1|) (<= |ULTIMATE.start_main_~f__x~1#1| (/ 3.0 4.0)) (= |ULTIMATE.start_main_~__tmp_2~0#1| 0.0) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1|) (<= |ULTIMATE.start_main_~g__x~1#1| (/ 1.0 4.0)) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~6#1| 1) (= ~__return_120473~0 |ULTIMATE.start_main_~main__y~0#1|) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~7#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 02:16:15,679 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:16:15,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:16:15,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2021-11-23 02:16:15,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109966382] [2021-11-23 02:16:15,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:16:15,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-23 02:16:15,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:15,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-23 02:16:15,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7100, Invalid=9930, Unknown=0, NotChecked=0, Total=17030 [2021-11-23 02:16:15,688 INFO L87 Difference]: Start difference. First operand 231 states and 232 transitions. Second operand has 97 states, 97 states have (on average 4.721649484536083) internal successors, (458), 96 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:16:16,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:16,273 INFO L93 Difference]: Finished difference Result 478 states and 527 transitions. [2021-11-23 02:16:16,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-23 02:16:16,274 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 4.721649484536083) internal successors, (458), 96 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 229 [2021-11-23 02:16:16,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:16,278 INFO L225 Difference]: With dead ends: 478 [2021-11-23 02:16:16,278 INFO L226 Difference]: Without dead ends: 471 [2021-11-23 02:16:16,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 733 GetRequests, 602 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7085 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=7100, Invalid=9930, Unknown=0, NotChecked=0, Total=17030 [2021-11-23 02:16:16,285 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 905 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:16,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [905 Valid, 359 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:16:16,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-11-23 02:16:16,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 471. [2021-11-23 02:16:16,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.004255319148936) internal successors, (472), 470 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:16:16,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 472 transitions. [2021-11-23 02:16:16,312 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 472 transitions. Word has length 229 [2021-11-23 02:16:16,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:16,312 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 472 transitions. [2021-11-23 02:16:16,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 4.721649484536083) internal successors, (458), 96 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:16:16,313 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 472 transitions. [2021-11-23 02:16:16,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2021-11-23 02:16:16,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:16,323 INFO L514 BasicCegarLoop]: trace histogram [86, 85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:16:16,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:16,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 02:16:16,537 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:16:16,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:16,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1162450751, now seen corresponding path program 4 times [2021-11-23 02:16:16,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:16,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548941786] [2021-11-23 02:16:16,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:16,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:16,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 18020 backedges. 0 proven. 18020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:20,424 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:20,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548941786] [2021-11-23 02:16:20,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548941786] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:16:20,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954678086] [2021-11-23 02:16:20,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:16:20,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:20,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:16:20,426 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:16:20,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:16:20,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:20,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 4034 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-23 02:16:21,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 18020 backedges. 0 proven. 18020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:21,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 18020 backedges. 0 proven. 18020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:31,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954678086] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:16:31,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [207569253] [2021-11-23 02:16:31,060 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2021-11-23 02:16:31,060 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:16:31,061 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:16:31,061 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:16:31,061 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:16:34,062 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:16:50,650 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8265#(and (<= 0.0 |ULTIMATE.start_main_~g__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~g__x~20#1|) (= (/ 3.0 4.0) |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (= |ULTIMATE.start_main_~__tmp_43~0#1| |ULTIMATE.start_main_~f__x~21#1|) (<= |ULTIMATE.start_main_~g__x~0#1| 0.0) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1|) (= ~__return_120502~0 0) (= ~__return_120477~0 |ULTIMATE.start_main_~main__z~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~3#1| 1) (= ~__return_120481~0 |ULTIMATE.start_main_~main__u~0#1|) (<= |ULTIMATE.start_main_~f__x~0#1| 0.0) (= ~__tmp_120439_1~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~5#1| 1) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~2#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1| 1) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~main__u~0#1|) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~8#1|) (= (/ 1.0 4.0) |ULTIMATE.start_main_~__tmp_4~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 1) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0.0) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~g__x~1#1|) (<= (/ 3.0 4.0) |ULTIMATE.start_main_~f__x~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~4#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~f__x~20#1|) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~g__x~21#1|) (< 100000 |ULTIMATE.start_main_~main__i~0#1|) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (= ~__return_120486~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (<= 0.0 |ULTIMATE.start_main_~f__x~0#1|) (<= |ULTIMATE.start_main_~f__x~1#1| (/ 3.0 4.0)) (= |ULTIMATE.start_main_~__tmp_2~0#1| 0.0) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1|) (<= |ULTIMATE.start_main_~g__x~1#1| (/ 1.0 4.0)) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~6#1| 1) (= ~__return_120473~0 |ULTIMATE.start_main_~main__y~0#1|) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~7#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 02:16:50,650 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:16:50,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:16:50,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2021-11-23 02:16:50,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507608825] [2021-11-23 02:16:50,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:16:50,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2021-11-23 02:16:50,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:50,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2021-11-23 02:16:50,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23468, Invalid=27834, Unknown=0, NotChecked=0, Total=51302 [2021-11-23 02:16:50,662 INFO L87 Difference]: Start difference. First operand 471 states and 472 transitions. Second operand has 193 states, 193 states have (on average 4.860103626943006) internal successors, (938), 192 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:16:52,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:52,743 INFO L93 Difference]: Finished difference Result 958 states and 1055 transitions. [2021-11-23 02:16:52,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-23 02:16:52,744 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 4.860103626943006) internal successors, (938), 192 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 469 [2021-11-23 02:16:52,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:52,751 INFO L225 Difference]: With dead ends: 958 [2021-11-23 02:16:52,751 INFO L226 Difference]: Without dead ends: 951 [2021-11-23 02:16:52,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1501 GetRequests, 1274 SyntacticMatches, 2 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13709 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=23468, Invalid=27834, Unknown=0, NotChecked=0, Total=51302 [2021-11-23 02:16:52,756 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 1302 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1302 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:52,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1302 Valid, 644 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 02:16:52,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-11-23 02:16:52,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 951. [2021-11-23 02:16:52,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 1.0021052631578948) internal successors, (952), 950 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:16:52,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 952 transitions. [2021-11-23 02:16:52,793 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 952 transitions. Word has length 469 [2021-11-23 02:16:52,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:52,794 INFO L470 AbstractCegarLoop]: Abstraction has 951 states and 952 transitions. [2021-11-23 02:16:52,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 4.860103626943006) internal successors, (938), 192 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:16:52,795 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 952 transitions. [2021-11-23 02:16:52,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 950 [2021-11-23 02:16:52,835 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:52,835 INFO L514 BasicCegarLoop]: trace histogram [182, 181, 181, 181, 181, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:16:52,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:53,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 02:16:53,056 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:16:53,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:53,057 INFO L85 PathProgramCache]: Analyzing trace with hash -37122367, now seen corresponding path program 5 times [2021-11-23 02:16:53,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:53,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530099254] [2021-11-23 02:16:53,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:53,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:53,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:06,010 INFO L134 CoverageAnalysis]: Checked inductivity of 81812 backedges. 0 proven. 81812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:17:06,011 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:06,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530099254] [2021-11-23 02:17:06,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530099254] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:17:06,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654707916] [2021-11-23 02:17:06,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:17:06,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:06,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:17:06,018 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:17:06,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:17:09,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 182 check-sat command(s) [2021-11-23 02:17:09,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:17:09,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 8066 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-23 02:17:09,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:17:11,102 INFO L134 CoverageAnalysis]: Checked inductivity of 81812 backedges. 0 proven. 81812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:17:11,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:17:46,570 INFO L134 CoverageAnalysis]: Checked inductivity of 81812 backedges. 0 proven. 81812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:17:46,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654707916] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:17:46,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [373845377] [2021-11-23 02:17:46,574 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2021-11-23 02:17:46,574 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:17:46,575 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:17:46,575 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:17:46,575 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:17:49,241 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:18:09,228 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17013#(and (<= 0.0 |ULTIMATE.start_main_~g__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~g__x~20#1|) (= (/ 3.0 4.0) |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (= |ULTIMATE.start_main_~__tmp_43~0#1| |ULTIMATE.start_main_~f__x~21#1|) (<= |ULTIMATE.start_main_~g__x~0#1| 0.0) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1|) (= ~__return_120502~0 0) (= ~__return_120477~0 |ULTIMATE.start_main_~main__z~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~3#1| 1) (= ~__return_120481~0 |ULTIMATE.start_main_~main__u~0#1|) (<= |ULTIMATE.start_main_~f__x~0#1| 0.0) (= ~__tmp_120439_1~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~5#1| 1) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~2#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1| 1) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~main__u~0#1|) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~8#1|) (= (/ 1.0 4.0) |ULTIMATE.start_main_~__tmp_4~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 1) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0.0) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~g__x~1#1|) (<= (/ 3.0 4.0) |ULTIMATE.start_main_~f__x~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~4#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~f__x~20#1|) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~g__x~21#1|) (< 100000 |ULTIMATE.start_main_~main__i~0#1|) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (= ~__return_120486~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (<= 0.0 |ULTIMATE.start_main_~f__x~0#1|) (<= |ULTIMATE.start_main_~f__x~1#1| (/ 3.0 4.0)) (= |ULTIMATE.start_main_~__tmp_2~0#1| 0.0) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1|) (<= |ULTIMATE.start_main_~g__x~1#1| (/ 1.0 4.0)) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~6#1| 1) (= ~__return_120473~0 |ULTIMATE.start_main_~main__y~0#1|) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~7#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 02:18:09,228 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:18:09,228 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:18:09,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2021-11-23 02:18:09,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518655180] [2021-11-23 02:18:09,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:18:09,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2021-11-23 02:18:09,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:18:09,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2021-11-23 02:18:09,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83852, Invalid=91290, Unknown=0, NotChecked=0, Total=175142 [2021-11-23 02:18:09,269 INFO L87 Difference]: Start difference. First operand 951 states and 952 transitions. Second operand has 385 states, 385 states have (on average 4.92987012987013) internal successors, (1898), 384 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:18:18,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:18:18,075 INFO L93 Difference]: Finished difference Result 1918 states and 2111 transitions. [2021-11-23 02:18:18,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-11-23 02:18:18,076 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 4.92987012987013) internal successors, (1898), 384 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 949 [2021-11-23 02:18:18,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:18:18,088 INFO L225 Difference]: With dead ends: 1918 [2021-11-23 02:18:18,088 INFO L226 Difference]: Without dead ends: 1911 [2021-11-23 02:18:18,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3037 GetRequests, 2618 SyntacticMatches, 2 SemanticMatches, 417 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26957 ImplicationChecksByTransitivity, 65.3s TimeCoverageRelationStatistics Valid=83852, Invalid=91290, Unknown=0, NotChecked=0, Total=175142 [2021-11-23 02:18:18,102 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 3036 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 645 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3036 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 1461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 645 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:18:18,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3036 Valid, 1240 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [645 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 02:18:18,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2021-11-23 02:18:18,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1911. [2021-11-23 02:18:18,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 1.0010471204188482) internal successors, (1912), 1910 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:18:18,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 1912 transitions. [2021-11-23 02:18:18,170 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 1912 transitions. Word has length 949 [2021-11-23 02:18:18,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:18:18,172 INFO L470 AbstractCegarLoop]: Abstraction has 1911 states and 1912 transitions. [2021-11-23 02:18:18,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 4.92987012987013) internal successors, (1898), 384 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:18:18,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 1912 transitions. [2021-11-23 02:18:18,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1910 [2021-11-23 02:18:18,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:18:18,201 INFO L514 BasicCegarLoop]: trace histogram [374, 373, 373, 373, 373, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:18:18,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:18:18,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:18:18,402 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:18:18,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:18:18,402 INFO L85 PathProgramCache]: Analyzing trace with hash -239609151, now seen corresponding path program 6 times [2021-11-23 02:18:18,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:18:18,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567080801] [2021-11-23 02:18:18,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:18,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:18:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:08,944 INFO L134 CoverageAnalysis]: Checked inductivity of 347636 backedges. 0 proven. 347636 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:19:08,944 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:08,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567080801] [2021-11-23 02:19:08,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567080801] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:19:08,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415505262] [2021-11-23 02:19:08,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:19:08,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:19:08,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:19:08,952 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:19:08,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:19:11,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:19:11,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:19:11,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 16130 conjuncts, 384 conjunts are in the unsatisfiable core [2021-11-23 02:19:11,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:19:15,348 INFO L134 CoverageAnalysis]: Checked inductivity of 347636 backedges. 0 proven. 347636 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:19:15,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:21:40,465 INFO L134 CoverageAnalysis]: Checked inductivity of 347636 backedges. 0 proven. 347636 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:21:40,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415505262] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:21:40,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2098103341] [2021-11-23 02:21:40,469 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2021-11-23 02:21:40,469 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:21:40,470 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:21:40,470 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:21:40,470 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:21:43,174 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:22:11,855 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34593#(and (<= 0.0 |ULTIMATE.start_main_~g__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~g__x~20#1|) (= (/ 3.0 4.0) |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (= |ULTIMATE.start_main_~__tmp_43~0#1| |ULTIMATE.start_main_~f__x~21#1|) (<= |ULTIMATE.start_main_~g__x~0#1| 0.0) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1|) (= ~__return_120502~0 0) (= ~__return_120477~0 |ULTIMATE.start_main_~main__z~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~3#1| 1) (= ~__return_120481~0 |ULTIMATE.start_main_~main__u~0#1|) (<= |ULTIMATE.start_main_~f__x~0#1| 0.0) (= ~__tmp_120439_1~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~5#1| 1) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~2#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1| 1) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~main__u~0#1|) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~8#1|) (= (/ 1.0 4.0) |ULTIMATE.start_main_~__tmp_4~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 1) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0.0) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~g__x~1#1|) (<= (/ 3.0 4.0) |ULTIMATE.start_main_~f__x~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~4#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~f__x~20#1|) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~g__x~21#1|) (< 100000 |ULTIMATE.start_main_~main__i~0#1|) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (= ~__return_120486~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (<= 0.0 |ULTIMATE.start_main_~f__x~0#1|) (<= |ULTIMATE.start_main_~f__x~1#1| (/ 3.0 4.0)) (= |ULTIMATE.start_main_~__tmp_2~0#1| 0.0) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1|) (<= |ULTIMATE.start_main_~g__x~1#1| (/ 1.0 4.0)) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~6#1| 1) (= ~__return_120473~0 |ULTIMATE.start_main_~main__y~0#1|) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~7#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 02:22:11,855 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:22:11,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:22:11,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [384, 384, 384] total 768 [2021-11-23 02:22:11,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164178955] [2021-11-23 02:22:11,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:22:11,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 769 states [2021-11-23 02:22:11,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:22:11,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 769 interpolants. [2021-11-23 02:22:11,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315212, Invalid=328794, Unknown=0, NotChecked=0, Total=644006 [2021-11-23 02:22:11,958 INFO L87 Difference]: Start difference. First operand 1911 states and 1912 transitions. Second operand has 769 states, 769 states have (on average 4.964889466840052) internal successors, (3818), 768 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:23:34,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:23:34,099 INFO L93 Difference]: Finished difference Result 3838 states and 4223 transitions. [2021-11-23 02:23:34,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2021-11-23 02:23:34,102 INFO L78 Accepts]: Start accepts. Automaton has has 769 states, 769 states have (on average 4.964889466840052) internal successors, (3818), 768 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1909 [2021-11-23 02:23:34,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:23:34,124 INFO L225 Difference]: With dead ends: 3838 [2021-11-23 02:23:34,124 INFO L226 Difference]: Without dead ends: 3831 [2021-11-23 02:23:34,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6109 GetRequests, 5306 SyntacticMatches, 2 SemanticMatches, 801 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53453 ImplicationChecksByTransitivity, 216.1s TimeCoverageRelationStatistics Valid=315212, Invalid=328794, Unknown=0, NotChecked=0, Total=644006 [2021-11-23 02:23:34,174 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 4272 mSDsluCounter, 2359 mSDsCounter, 0 mSdLazyCounter, 1581 mSolverCounterSat, 800 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4272 SdHoareTripleChecker+Valid, 2388 SdHoareTripleChecker+Invalid, 2381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 800 IncrementalHoareTripleChecker+Valid, 1581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:23:34,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4272 Valid, 2388 Invalid, 2381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [800 Valid, 1581 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-23 02:23:34,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3831 states. [2021-11-23 02:23:34,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3831 to 3831. [2021-11-23 02:23:34,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3831 states, 3830 states have (on average 1.0005221932114883) internal successors, (3832), 3830 states have internal predecessors, (3832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:23:34,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3831 states to 3831 states and 3832 transitions. [2021-11-23 02:23:34,303 INFO L78 Accepts]: Start accepts. Automaton has 3831 states and 3832 transitions. Word has length 1909 [2021-11-23 02:23:34,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:23:34,305 INFO L470 AbstractCegarLoop]: Abstraction has 3831 states and 3832 transitions. [2021-11-23 02:23:34,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 769 states, 769 states have (on average 4.964889466840052) internal successors, (3818), 768 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:23:34,308 INFO L276 IsEmpty]: Start isEmpty. Operand 3831 states and 3832 transitions. [2021-11-23 02:23:34,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3830 [2021-11-23 02:23:34,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:23:34,405 INFO L514 BasicCegarLoop]: trace histogram [758, 757, 757, 757, 757, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:23:34,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:23:34,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cab8684-9b7c-4e7e-9b24-61a01f4025ac/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:23:34,608 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:23:34,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:23:34,609 INFO L85 PathProgramCache]: Analyzing trace with hash 280261313, now seen corresponding path program 7 times [2021-11-23 02:23:34,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:23:34,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759950913] [2021-11-23 02:23:34,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:34,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:23:38,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat