./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/eqn2f.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_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/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_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/eqn2f.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/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_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/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 9492838383a14835fe4416045232ed048098976ee70d4c4f9afc54e7ded61319 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:53:14,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:53:14,893 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:53:14,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:53:14,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:53:14,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:53:14,976 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:53:14,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:53:14,985 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:53:14,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:53:14,994 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:53:14,996 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:53:14,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:53:14,999 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:53:15,000 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:53:15,002 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:53:15,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:53:15,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:53:15,008 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:53:15,010 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:53:15,013 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:53:15,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:53:15,017 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:53:15,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:53:15,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:53:15,023 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:53:15,023 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:53:15,025 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:53:15,026 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:53:15,028 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:53:15,028 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:53:15,029 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:53:15,031 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:53:15,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:53:15,034 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:53:15,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:53:15,035 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:53:15,035 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:53:15,036 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:53:15,037 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:53:15,038 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:53:15,039 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:53:15,076 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:53:15,077 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:53:15,077 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:53:15,077 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:53:15,078 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:53:15,079 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:53:15,079 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:53:15,079 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:53:15,079 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:53:15,080 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:53:15,080 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:53:15,080 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:53:15,080 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:53:15,080 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:53:15,081 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:53:15,081 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:53:15,081 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:53:15,081 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:53:15,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:53:15,083 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:53:15,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:53:15,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:53:15,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:53:15,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:53:15,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:53:15,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:53:15,084 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:53:15,085 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:53:15,085 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:53:15,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:53:15,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:53:15,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:53:15,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:53:15,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:53:15,086 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:53:15,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:53:15,087 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:53:15,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:53:15,087 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:53:15,088 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:53:15,088 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:53:15,088 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_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9492838383a14835fe4416045232ed048098976ee70d4c4f9afc54e7ded61319 [2021-11-23 03:53:15,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:53:15,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:53:15,530 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:53:15,532 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:53:15,533 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:53:15,535 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-fpi/eqn2f.c [2021-11-23 03:53:15,627 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/data/84b0f7b63/dee31b5f65c24680ad982316b2b25bdf/FLAGb0242bc54 [2021-11-23 03:53:16,264 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:53:16,265 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/sv-benchmarks/c/array-fpi/eqn2f.c [2021-11-23 03:53:16,273 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/data/84b0f7b63/dee31b5f65c24680ad982316b2b25bdf/FLAGb0242bc54 [2021-11-23 03:53:16,636 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/data/84b0f7b63/dee31b5f65c24680ad982316b2b25bdf [2021-11-23 03:53:16,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:53:16,642 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:53:16,660 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:53:16,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:53:16,665 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:53:16,666 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:53:16" (1/1) ... [2021-11-23 03:53:16,668 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c9e4511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:53:16, skipping insertion in model container [2021-11-23 03:53:16,668 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:53:16" (1/1) ... [2021-11-23 03:53:16,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:53:16,701 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:53:16,915 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_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/sv-benchmarks/c/array-fpi/eqn2f.c[588,601] [2021-11-23 03:53:16,944 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:53:16,955 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:53:16,970 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_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/sv-benchmarks/c/array-fpi/eqn2f.c[588,601] [2021-11-23 03:53:16,980 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:53:16,998 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:53:16,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:53:16 WrapperNode [2021-11-23 03:53:16,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:53:17,000 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:53:17,000 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:53:17,000 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:53:17,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:53:16" (1/1) ... [2021-11-23 03:53:17,019 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:53:16" (1/1) ... [2021-11-23 03:53:17,046 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2021-11-23 03:53:17,050 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:53:17,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:53:17,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:53:17,051 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:53:17,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:53:16" (1/1) ... [2021-11-23 03:53:17,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:53:16" (1/1) ... [2021-11-23 03:53:17,084 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:53:16" (1/1) ... [2021-11-23 03:53:17,084 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:53:16" (1/1) ... [2021-11-23 03:53:17,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:53:16" (1/1) ... [2021-11-23 03:53:17,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:53:16" (1/1) ... [2021-11-23 03:53:17,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:53:16" (1/1) ... [2021-11-23 03:53:17,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:53:17,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:53:17,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:53:17,104 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:53:17,105 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:53:16" (1/1) ... [2021-11-23 03:53:17,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:53:17,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:53:17,159 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:53:17,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:53:17,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:53:17,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:53:17,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:53:17,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:53:17,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:53:17,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:53:17,229 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:53:17,333 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:53:17,335 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:53:17,529 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:53:17,608 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:53:17,617 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 03:53:17,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:53:17 BoogieIcfgContainer [2021-11-23 03:53:17,620 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:53:17,622 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:53:17,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:53:17,639 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:53:17,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:53:16" (1/3) ... [2021-11-23 03:53:17,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10a6414d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:53:17, skipping insertion in model container [2021-11-23 03:53:17,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:53:16" (2/3) ... [2021-11-23 03:53:17,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10a6414d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:53:17, skipping insertion in model container [2021-11-23 03:53:17,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:53:17" (3/3) ... [2021-11-23 03:53:17,643 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn2f.c [2021-11-23 03:53:17,650 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:53:17,662 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:53:17,743 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:53:17,753 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 03:53:17,753 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:53:17,772 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 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 03:53:17,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 03:53:17,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:53:17,783 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:53:17,783 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:53:17,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:53:17,799 INFO L85 PathProgramCache]: Analyzing trace with hash -735732333, now seen corresponding path program 1 times [2021-11-23 03:53:17,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:53:17,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713929724] [2021-11-23 03:53:17,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:53:17,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:53:17,954 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:53:17,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1974652358] [2021-11-23 03:53:17,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:53:17,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:53:17,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:53:17,958 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:53:17,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:53:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:53:18,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:53:18,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:53:18,199 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-23 03:53:18,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-11-23 03:53:18,456 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 03:53:18,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:53:18,457 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:53:18,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713929724] [2021-11-23 03:53:18,459 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:53:18,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974652358] [2021-11-23 03:53:18,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974652358] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:53:18,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:53:18,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:53:18,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060419438] [2021-11-23 03:53:18,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:53:18,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:53:18,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:53:18,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:53:18,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:53:18,532 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 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 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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 03:53:18,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:53:18,775 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-11-23 03:53:18,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:53:18,780 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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 7 [2021-11-23 03:53:18,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:53:18,791 INFO L225 Difference]: With dead ends: 35 [2021-11-23 03:53:18,792 INFO L226 Difference]: Without dead ends: 20 [2021-11-23 03:53:18,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:53:18,805 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:53:18,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 19 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:53:18,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-23 03:53:18,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 13. [2021-11-23 03:53:18,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 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 03:53:18,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2021-11-23 03:53:18,861 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 7 [2021-11-23 03:53:18,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:53:18,862 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2021-11-23 03:53:18,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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 03:53:18,863 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2021-11-23 03:53:18,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 03:53:18,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:53:18,865 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:53:18,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:53:19,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:53:19,080 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:53:19,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:53:19,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1337635293, now seen corresponding path program 1 times [2021-11-23 03:53:19,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:53:19,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131361241] [2021-11-23 03:53:19,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:53:19,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:53:19,113 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:53:19,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978054421] [2021-11-23 03:53:19,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:53:19,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:53:19,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:53:19,121 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:53:19,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:53:19,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:53:19,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:53:19,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:53:19,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:53:19,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:53:19,252 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:53:19,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131361241] [2021-11-23 03:53:19,252 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:53:19,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978054421] [2021-11-23 03:53:19,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978054421] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:53:19,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:53:19,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:53:19,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208749049] [2021-11-23 03:53:19,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:53:19,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:53:19,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:53:19,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:53:19,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:53:19,257 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 03:53:19,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:53:19,308 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2021-11-23 03:53:19,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:53:19,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2021-11-23 03:53:19,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:53:19,310 INFO L225 Difference]: With dead ends: 25 [2021-11-23 03:53:19,310 INFO L226 Difference]: Without dead ends: 19 [2021-11-23 03:53:19,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:53:19,313 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:53:19,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 9 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:53:19,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-23 03:53:19,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 13. [2021-11-23 03:53:19,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 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 03:53:19,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-11-23 03:53:19,324 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2021-11-23 03:53:19,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:53:19,325 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-11-23 03:53:19,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 03:53:19,326 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-11-23 03:53:19,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 03:53:19,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:53:19,328 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:53:19,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:53:19,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-23 03:53:19,544 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:53:19,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:53:19,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1611921030, now seen corresponding path program 1 times [2021-11-23 03:53:19,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:53:19,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480724593] [2021-11-23 03:53:19,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:53:19,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:53:19,571 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:53:19,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [905229514] [2021-11-23 03:53:19,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:53:19,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:53:19,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:53:19,574 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:53:19,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:53:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:53:19,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:53:19,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:53:19,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:53:19,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:53:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:53:19,730 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:53:19,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480724593] [2021-11-23 03:53:19,731 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:53:19,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905229514] [2021-11-23 03:53:19,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905229514] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:53:19,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1794508778] [2021-11-23 03:53:19,756 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 03:53:19,757 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:53:19,763 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:53:19,770 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:53:19,771 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:53:20,005 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-23 03:53:20,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-23 03:53:20,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2021-11-23 03:53:20,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-23 03:53:20,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:20,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 52 [2021-11-23 03:53:20,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:20,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:20,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:20,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:20,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:20,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:20,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:20,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:20,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:20,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:20,488 INFO L354 Elim1Store]: treesize reduction 115, result has 11.5 percent of original size [2021-11-23 03:53:20,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 374 treesize of output 378 [2021-11-23 03:53:20,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:20,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-11-23 03:53:20,853 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:53:21,270 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '238#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) (* 2 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem13#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= ~N~0 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 03:53:21,270 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:53:21,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:53:21,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-23 03:53:21,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43692305] [2021-11-23 03:53:21,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:53:21,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:53:21,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:53:21,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:53:21,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:53:21,277 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 03:53:21,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:53:21,404 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-11-23 03:53:21,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:53:21,406 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 8 [2021-11-23 03:53:21,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:53:21,407 INFO L225 Difference]: With dead ends: 29 [2021-11-23 03:53:21,407 INFO L226 Difference]: Without dead ends: 24 [2021-11-23 03:53:21,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:53:21,416 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:53:21,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 18 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:53:21,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-23 03:53:21,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2021-11-23 03:53:21,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 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 03:53:21,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-11-23 03:53:21,433 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2021-11-23 03:53:21,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:53:21,433 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-23 03:53:21,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 03:53:21,434 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-11-23 03:53:21,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 03:53:21,434 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:53:21,434 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:53:21,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:53:21,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:53:21,648 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:53:21,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:53:21,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1565286172, now seen corresponding path program 1 times [2021-11-23 03:53:21,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:53:21,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405050619] [2021-11-23 03:53:21,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:53:21,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:53:21,693 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:53:21,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1969926568] [2021-11-23 03:53:21,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:53:21,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:53:21,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:53:21,701 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:53:21,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:53:21,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:53:21,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 03:53:21,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:53:21,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 03:53:21,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-23 03:53:21,864 INFO L354 Elim1Store]: treesize reduction 74, result has 26.0 percent of original size [2021-11-23 03:53:21,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 52 [2021-11-23 03:53:22,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:22,144 INFO L354 Elim1Store]: treesize reduction 204, result has 13.2 percent of original size [2021-11-23 03:53:22,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 70 treesize of output 70 [2021-11-23 03:53:22,658 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 03:53:22,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:53:24,259 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 03:53:24,260 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:53:24,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405050619] [2021-11-23 03:53:24,260 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:53:24,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969926568] [2021-11-23 03:53:24,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969926568] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:53:24,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1885689236] [2021-11-23 03:53:24,264 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 03:53:24,265 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:53:24,265 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:53:24,266 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:53:24,266 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:53:24,342 INFO L354 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2021-11-23 03:53:24,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 46 [2021-11-23 03:53:24,539 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-23 03:53:24,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-23 03:53:24,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2021-11-23 03:53:24,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:24,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:24,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 60 [2021-11-23 03:53:24,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:24,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:24,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:24,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:24,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:24,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:24,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:24,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:24,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:24,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:24,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:24,905 INFO L354 Elim1Store]: treesize reduction 118, result has 0.8 percent of original size [2021-11-23 03:53:24,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 393 treesize of output 377 [2021-11-23 03:53:25,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:25,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-11-23 03:53:25,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:25,062 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:53:25,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-23 03:53:25,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:25,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:25,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:25,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:25,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:25,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:25,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:25,180 INFO L354 Elim1Store]: treesize reduction 144, result has 6.5 percent of original size [2021-11-23 03:53:25,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 92 treesize of output 104 [2021-11-23 03:53:25,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:25,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:25,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:25,245 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:53:25,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-23 03:53:25,276 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:53:25,673 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '370#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) (* 2 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem13#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 03:53:25,673 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:53:25,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:53:25,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-11-23 03:53:25,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761976616] [2021-11-23 03:53:25,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:53:25,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 03:53:25,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:53:25,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 03:53:25,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-11-23 03:53:25,676 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 03:53:25,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:53:25,989 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2021-11-23 03:53:25,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 03:53:25,990 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 9 [2021-11-23 03:53:25,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:53:25,993 INFO L225 Difference]: With dead ends: 33 [2021-11-23 03:53:25,993 INFO L226 Difference]: Without dead ends: 31 [2021-11-23 03:53:25,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-11-23 03:53:25,995 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 13 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:53:25,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 25 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 41 Invalid, 0 Unknown, 81 Unchecked, 0.1s Time] [2021-11-23 03:53:25,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-23 03:53:26,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 18. [2021-11-23 03:53:26,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 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 03:53:26,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-11-23 03:53:26,004 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 9 [2021-11-23 03:53:26,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:53:26,005 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-11-23 03:53:26,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 03:53:26,006 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2021-11-23 03:53:26,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 03:53:26,007 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:53:26,007 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:53:26,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-23 03:53:26,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:53:26,212 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:53:26,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:53:26,212 INFO L85 PathProgramCache]: Analyzing trace with hash -978676906, now seen corresponding path program 1 times [2021-11-23 03:53:26,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:53:26,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126825583] [2021-11-23 03:53:26,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:53:26,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:53:26,228 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:53:26,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916490369] [2021-11-23 03:53:26,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:53:26,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:53:26,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:53:26,230 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:53:26,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:53:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:53:26,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:53:26,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:53:26,383 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 03:53:26,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:53:26,384 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:53:26,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126825583] [2021-11-23 03:53:26,386 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:53:26,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916490369] [2021-11-23 03:53:26,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916490369] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:53:26,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:53:26,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 03:53:26,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590220696] [2021-11-23 03:53:26,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:53:26,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:53:26,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:53:26,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:53:26,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:53:26,397 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 03:53:26,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:53:26,469 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2021-11-23 03:53:26,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:53:26,470 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 10 [2021-11-23 03:53:26,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:53:26,475 INFO L225 Difference]: With dead ends: 32 [2021-11-23 03:53:26,475 INFO L226 Difference]: Without dead ends: 22 [2021-11-23 03:53:26,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:53:26,477 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:53:26,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 10 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:53:26,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-23 03:53:26,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 17. [2021-11-23 03:53:26,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 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 03:53:26,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2021-11-23 03:53:26,495 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 10 [2021-11-23 03:53:26,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:53:26,495 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-11-23 03:53:26,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 03:53:26,496 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2021-11-23 03:53:26,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 03:53:26,497 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:53:26,497 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:53:26,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:53:26,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:53:26,711 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:53:26,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:53:26,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1274461626, now seen corresponding path program 2 times [2021-11-23 03:53:26,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:53:26,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783833953] [2021-11-23 03:53:26,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:53:26,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:53:26,746 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:53:26,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1434246230] [2021-11-23 03:53:26,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:53:26,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:53:26,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:53:26,758 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:53:26,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:53:26,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 03:53:26,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:53:26,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:53:26,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:53:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:53:26,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:53:26,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:53:26,940 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:53:26,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783833953] [2021-11-23 03:53:26,940 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:53:26,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434246230] [2021-11-23 03:53:26,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434246230] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:53:26,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [98972448] [2021-11-23 03:53:26,944 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 03:53:26,944 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:53:26,945 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:53:26,945 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:53:26,945 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:53:27,110 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-23 03:53:27,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-23 03:53:27,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2021-11-23 03:53:27,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-23 03:53:27,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:27,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:27,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 60 [2021-11-23 03:53:27,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:27,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:27,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:27,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:27,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:27,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:27,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:27,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:27,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:27,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:27,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:27,390 INFO L354 Elim1Store]: treesize reduction 118, result has 0.8 percent of original size [2021-11-23 03:53:27,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 393 treesize of output 377 [2021-11-23 03:53:27,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:27,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-11-23 03:53:27,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:27,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:27,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:27,531 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:53:27,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-23 03:53:27,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:27,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:27,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:27,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:27,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:27,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:27,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:27,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:27,596 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 03:53:27,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 101 [2021-11-23 03:53:27,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:27,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:27,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:27,643 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:53:27,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-23 03:53:27,684 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:53:28,030 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '639#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) (* 2 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem13#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 03:53:28,030 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:53:28,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:53:28,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-23 03:53:28,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597518269] [2021-11-23 03:53:28,031 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:53:28,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:53:28,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:53:28,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:53:28,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:53:28,033 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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 03:53:28,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:53:28,148 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2021-11-23 03:53:28,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:53:28,149 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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 10 [2021-11-23 03:53:28,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:53:28,150 INFO L225 Difference]: With dead ends: 36 [2021-11-23 03:53:28,152 INFO L226 Difference]: Without dead ends: 30 [2021-11-23 03:53:28,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:53:28,154 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:53:28,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 15 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:53:28,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-23 03:53:28,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 19. [2021-11-23 03:53:28,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 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 03:53:28,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-11-23 03:53:28,173 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2021-11-23 03:53:28,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:53:28,174 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-11-23 03:53:28,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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 03:53:28,174 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-11-23 03:53:28,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 03:53:28,176 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:53:28,176 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:53:28,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:53:28,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 03:53:28,392 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:53:28,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:53:28,392 INFO L85 PathProgramCache]: Analyzing trace with hash -746752909, now seen corresponding path program 3 times [2021-11-23 03:53:28,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:53:28,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745870737] [2021-11-23 03:53:28,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:53:28,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:53:28,448 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:53:28,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [59643242] [2021-11-23 03:53:28,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:53:28,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:53:28,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:53:28,456 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:53:28,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:53:28,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:53:28,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:53:28,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 03:53:28,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:53:28,574 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-23 03:53:28,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-11-23 03:53:28,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 03:53:28,684 INFO L354 Elim1Store]: treesize reduction 74, result has 26.0 percent of original size [2021-11-23 03:53:28,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 52 [2021-11-23 03:53:28,897 INFO L354 Elim1Store]: treesize reduction 200, result has 28.3 percent of original size [2021-11-23 03:53:28,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 116 [2021-11-23 03:53:30,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:30,610 INFO L354 Elim1Store]: treesize reduction 152, result has 0.7 percent of original size [2021-11-23 03:53:30,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 123 treesize of output 121 [2021-11-23 03:53:31,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:31,727 INFO L354 Elim1Store]: treesize reduction 962, result has 8.9 percent of original size [2021-11-23 03:53:31,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 169 treesize of output 170 [2021-11-23 03:55:10,228 INFO L354 Elim1Store]: treesize reduction 577, result has 18.7 percent of original size [2021-11-23 03:55:10,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 185 treesize of output 220 [2021-11-23 03:55:10,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:55:10,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:55:12,297 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_98| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_98| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (= (select (let ((.cse0 (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse3 (* |c_ULTIMATE.start_main_~i~0#1| 8))) (store .cse2 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse3) (+ (select .cse2 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse3 (- 8))) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse3 (- 8))))))) (.cse1 (* |v_ULTIMATE.start_main_~i~0#1_98| 8))) (store .cse0 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse1) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse1 (- 8))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse0) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1 (- 8)))))) |c_ULTIMATE.start_main_~b~0#1.offset|) 1))) is different from false [2021-11-23 03:55:13,505 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_98| Int)) (or (= (select (let ((.cse0 (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|))) (store .cse2 (+ |c_ULTIMATE.start_main_~b~0#1.offset| 8) (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse2 |c_ULTIMATE.start_main_~b~0#1.offset|))))) (.cse1 (* |v_ULTIMATE.start_main_~i~0#1_98| 8))) (store .cse0 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse1) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse0) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1 (- 8))) (select .cse0 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse1 (- 8)))))) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (< |v_ULTIMATE.start_main_~i~0#1_98| 2))) is different from false [2021-11-23 03:55:15,585 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~i~0#1| Int) (|v_ULTIMATE.start_main_~i~0#1_98| Int)) (or (= (select (let ((.cse4 (let ((.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse6 (* |ULTIMATE.start_main_~i~0#1| 8))) (store .cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse6) (+ 4 (select .cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse6 (- 8)))))))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse4))) (let ((.cse0 (let ((.cse3 (select .cse2 |c_ULTIMATE.start_main_~b~0#1.base|))) (store .cse3 (+ |c_ULTIMATE.start_main_~b~0#1.offset| 8) (+ (select .cse3 |c_ULTIMATE.start_main_~b~0#1.offset|) (select .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (.cse1 (* |v_ULTIMATE.start_main_~i~0#1_98| 8))) (store .cse0 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse1) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse1 (- 8))) (select (select (store .cse2 |c_ULTIMATE.start_main_~b~0#1.base| .cse0) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1 (- 8)))))))) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (< |v_ULTIMATE.start_main_~i~0#1_98| 2))) is different from false [2021-11-23 03:55:17,699 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~i~0#1| Int) (|v_ULTIMATE.start_main_~i~0#1_102| Int) (|v_ULTIMATE.start_main_~i~0#1_98| Int)) (or (= (select (let ((.cse4 (let ((.cse5 (let ((.cse7 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse8 (* |ULTIMATE.start_main_~i~0#1| 8))) (store .cse7 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse8) (+ 4 (select .cse7 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse8 (- 8))))))) (.cse6 (* |v_ULTIMATE.start_main_~i~0#1_102| 8))) (store .cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse6) (+ (select .cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse6 (- 8))) 4))))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse4))) (let ((.cse0 (let ((.cse3 (select .cse2 |c_ULTIMATE.start_main_~b~0#1.base|))) (store .cse3 (+ |c_ULTIMATE.start_main_~b~0#1.offset| 8) (+ (select .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse3 |c_ULTIMATE.start_main_~b~0#1.offset|))))) (.cse1 (* |v_ULTIMATE.start_main_~i~0#1_98| 8))) (store .cse0 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse1) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse1 (- 8))) (select (select (store .cse2 |c_ULTIMATE.start_main_~b~0#1.base| .cse0) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1 (- 8)))))))) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (< |v_ULTIMATE.start_main_~i~0#1_98| 2))) is different from false [2021-11-23 03:55:17,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-11-23 03:55:17,725 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:55:17,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745870737] [2021-11-23 03:55:17,725 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:55:17,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59643242] [2021-11-23 03:55:17,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59643242] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:55:17,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1027657176] [2021-11-23 03:55:17,729 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 03:55:17,729 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:55:17,730 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:55:17,730 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:55:17,730 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:55:17,884 INFO L354 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2021-11-23 03:55:17,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 60 [2021-11-23 03:55:17,962 INFO L354 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2021-11-23 03:55:17,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 46 [2021-11-23 03:55:18,090 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-23 03:55:18,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-23 03:55:18,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:18,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-11-23 03:55:18,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:18,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:18,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:18,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:55:18,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 55 [2021-11-23 03:55:18,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:18,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-11-23 03:55:18,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:18,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:18,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:18,269 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:55:18,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-23 03:55:18,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:18,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:18,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:18,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:18,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:18,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:18,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:18,381 INFO L354 Elim1Store]: treesize reduction 144, result has 6.5 percent of original size [2021-11-23 03:55:18,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 67 treesize of output 79 [2021-11-23 03:55:18,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:18,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:18,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:18,434 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:55:18,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-23 03:55:18,475 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:55:19,067 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '809#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) (* 2 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem13#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-23 03:55:19,067 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:55:19,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:55:19,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-11-23 03:55:19,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665890072] [2021-11-23 03:55:19,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:55:19,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 03:55:19,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:55:19,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 03:55:19,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=260, Unknown=4, NotChecked=140, Total=462 [2021-11-23 03:55:19,071 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 17 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 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 03:55:21,099 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (= 1 (select .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|)) (= (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) 8) (forall ((|ULTIMATE.start_main_~i~0#1| Int) (|v_ULTIMATE.start_main_~i~0#1_102| Int) (|v_ULTIMATE.start_main_~i~0#1_98| Int)) (or (= (select (let ((.cse6 (let ((.cse7 (let ((.cse9 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse10 (* |ULTIMATE.start_main_~i~0#1| 8))) (store .cse9 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse10) (+ 4 (select .cse9 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse10 (- 8))))))) (.cse8 (* |v_ULTIMATE.start_main_~i~0#1_102| 8))) (store .cse7 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse8) (+ (select .cse7 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse8 (- 8))) 4))))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse6))) (let ((.cse2 (let ((.cse5 (select .cse4 |c_ULTIMATE.start_main_~b~0#1.base|))) (store .cse5 (+ |c_ULTIMATE.start_main_~b~0#1.offset| 8) (+ (select .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse5 |c_ULTIMATE.start_main_~b~0#1.offset|))))) (.cse3 (* |v_ULTIMATE.start_main_~i~0#1_98| 8))) (store .cse2 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse3) (+ (select .cse2 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse3 (- 8))) (select (select (store .cse4 |c_ULTIMATE.start_main_~b~0#1.base| .cse2) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse3 (- 8)))))))) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (< |v_ULTIMATE.start_main_~i~0#1_98| 2))) (= |c_ULTIMATE.start_main_~b~0#1.offset| 0) (= (select (let ((.cse11 (* |c_ULTIMATE.start_main_~i~0#1| 8))) (store .cse0 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse11) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse11 (- 8))) (select .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse11 (- 8)))))) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (not (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)))) is different from false [2021-11-23 03:55:23,124 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_~i~0#1| Int) (|v_ULTIMATE.start_main_~i~0#1_98| Int)) (or (= (select (let ((.cse4 (let ((.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse6 (* |ULTIMATE.start_main_~i~0#1| 8))) (store .cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse6) (+ 4 (select .cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse6 (- 8)))))))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse4))) (let ((.cse0 (let ((.cse3 (select .cse2 |c_ULTIMATE.start_main_~b~0#1.base|))) (store .cse3 (+ |c_ULTIMATE.start_main_~b~0#1.offset| 8) (+ (select .cse3 |c_ULTIMATE.start_main_~b~0#1.offset|) (select .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (.cse1 (* |v_ULTIMATE.start_main_~i~0#1_98| 8))) (store .cse0 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse1) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse1 (- 8))) (select (select (store .cse2 |c_ULTIMATE.start_main_~b~0#1.base| .cse0) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1 (- 8)))))))) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (< |v_ULTIMATE.start_main_~i~0#1_98| 2))) (= 1 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|)) (exists ((|v_ULTIMATE.start_main_~i~0#1_92| Int)) (let ((.cse7 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (or (= (select .cse7 |c_ULTIMATE.start_main_~a~0#1.offset|) 8) (= (* 8 |v_ULTIMATE.start_main_~i~0#1_92|) 0)) (let ((.cse8 (* |v_ULTIMATE.start_main_~i~0#1_92| 8))) (= (+ (select .cse7 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse8 (- 8))) 4) (select .cse7 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse8))))))) (= |c_ULTIMATE.start_main_~b~0#1.offset| 0) (not (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|))) is different from false [2021-11-23 03:55:25,056 WARN L838 $PredicateComparison]: unable to prove that (and (= 1 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_98| Int)) (or (= (select (let ((.cse0 (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|))) (store .cse2 (+ |c_ULTIMATE.start_main_~b~0#1.offset| 8) (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse2 |c_ULTIMATE.start_main_~b~0#1.offset|))))) (.cse1 (* |v_ULTIMATE.start_main_~i~0#1_98| 8))) (store .cse0 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse1) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse0) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1 (- 8))) (select .cse0 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse1 (- 8)))))) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (< |v_ULTIMATE.start_main_~i~0#1_98| 2))) (= |c_ULTIMATE.start_main_~b~0#1.offset| 0) (not (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (exists ((|v_ULTIMATE.start_main_~i~0#1_93| Int) (|v_ULTIMATE.start_main_~i~0#1_92| Int)) (let ((.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse5 (* |v_ULTIMATE.start_main_~i~0#1_92| 8))) (let ((.cse7 (* 8 |v_ULTIMATE.start_main_~i~0#1_93|)) (.cse6 (select .cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse5))) (.cse8 (* 8 |v_ULTIMATE.start_main_~i~0#1_92|))) (and (let ((.cse4 (* |v_ULTIMATE.start_main_~i~0#1_93| 8))) (= (+ (select .cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse4 (- 8))) 4) (select .cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse4)))) (or (= (+ (select .cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse5 (- 8))) 4) .cse6) (= (+ .cse7 8) .cse8)) (or (and (or (= (select .cse3 |c_ULTIMATE.start_main_~a~0#1.offset|) 8) (= .cse7 0)) (or (not (= .cse8 8)) (= 12 .cse6))) (= .cse8 0))))))) is different from false [2021-11-23 03:55:26,755 WARN L838 $PredicateComparison]: unable to prove that (and (= 1 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|)) (= |c_ULTIMATE.start_main_~i~0#1| 1) (= |c_ULTIMATE.start_main_~b~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_98| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_98| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (= (select (let ((.cse0 (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse3 (* |c_ULTIMATE.start_main_~i~0#1| 8))) (store .cse2 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse3) (+ (select .cse2 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse3 (- 8))) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse3 (- 8))))))) (.cse1 (* |v_ULTIMATE.start_main_~i~0#1_98| 8))) (store .cse0 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse1) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse1 (- 8))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse0) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1 (- 8)))))) |c_ULTIMATE.start_main_~b~0#1.offset|) 1))) (not (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (exists ((|v_ULTIMATE.start_main_~i~0#1_93| Int) (|v_ULTIMATE.start_main_~i~0#1_92| Int)) (let ((.cse4 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse6 (* |v_ULTIMATE.start_main_~i~0#1_92| 8))) (let ((.cse8 (* 8 |v_ULTIMATE.start_main_~i~0#1_93|)) (.cse7 (select .cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse6))) (.cse9 (* 8 |v_ULTIMATE.start_main_~i~0#1_92|))) (and (let ((.cse5 (* |v_ULTIMATE.start_main_~i~0#1_93| 8))) (= (+ (select .cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse5 (- 8))) 4) (select .cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse5)))) (or (= (+ (select .cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse6 (- 8))) 4) .cse7) (= (+ .cse8 8) .cse9)) (or (and (or (= (select .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|) 8) (= .cse8 0)) (or (not (= .cse9 8)) (= 12 .cse7))) (= .cse9 0))))))) is different from false [2021-11-23 03:55:26,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:55:26,902 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-11-23 03:55:26,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:55:26,903 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 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 11 [2021-11-23 03:55:26,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:55:26,904 INFO L225 Difference]: With dead ends: 28 [2021-11-23 03:55:26,904 INFO L226 Difference]: Without dead ends: 26 [2021-11-23 03:55:26,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=70, Invalid=296, Unknown=8, NotChecked=328, Total=702 [2021-11-23 03:55:26,906 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:55:26,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 39 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 103 Unchecked, 0.1s Time] [2021-11-23 03:55:26,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-23 03:55:26,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2021-11-23 03:55:26,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 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 03:55:26,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2021-11-23 03:55:26,915 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 11 [2021-11-23 03:55:26,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:55:26,915 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-11-23 03:55:26,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 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 03:55:26,916 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2021-11-23 03:55:26,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 03:55:26,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:55:26,917 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:55:26,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-23 03:55:27,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 03:55:27,140 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:55:27,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:55:27,140 INFO L85 PathProgramCache]: Analyzing trace with hash -659676164, now seen corresponding path program 4 times [2021-11-23 03:55:27,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:55:27,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247475461] [2021-11-23 03:55:27,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:55:27,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:55:27,187 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:55:27,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [408430616] [2021-11-23 03:55:27,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:55:27,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:55:27,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:55:27,190 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:55:27,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 03:55:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:55:27,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 03:55:27,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:55:27,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:55:27,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:55:27,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:55:27,402 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:55:27,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247475461] [2021-11-23 03:55:27,402 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:55:27,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408430616] [2021-11-23 03:55:27,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408430616] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:55:27,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [710997342] [2021-11-23 03:55:27,406 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-23 03:55:27,406 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:55:27,406 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:55:27,407 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:55:27,407 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:55:27,480 INFO L354 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2021-11-23 03:55:27,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 46 [2021-11-23 03:55:27,622 INFO L354 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2021-11-23 03:55:27,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 60 [2021-11-23 03:55:27,777 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-23 03:55:27,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-23 03:55:27,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:27,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-11-23 03:55:27,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:27,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:27,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:27,872 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:55:27,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 55 [2021-11-23 03:55:27,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:27,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-11-23 03:55:27,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:27,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:27,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:27,939 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:55:27,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-23 03:55:27,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:27,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:27,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:27,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:27,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:27,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:27,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:27,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:27,993 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 03:55:27,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 76 [2021-11-23 03:55:28,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:28,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:28,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:28,034 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:55:28,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-23 03:55:28,063 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:55:28,443 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '973#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (+ (* 2 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) (* 2 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem13#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-23 03:55:28,443 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:55:28,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:55:28,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-11-23 03:55:28,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942401944] [2021-11-23 03:55:28,444 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:55:28,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 03:55:28,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:55:28,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 03:55:28,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-11-23 03:55:28,445 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 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 03:55:28,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:55:28,802 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2021-11-23 03:55:28,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 03:55:28,805 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 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 11 [2021-11-23 03:55:28,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:55:28,806 INFO L225 Difference]: With dead ends: 65 [2021-11-23 03:55:28,806 INFO L226 Difference]: Without dead ends: 58 [2021-11-23 03:55:28,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2021-11-23 03:55:28,808 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 48 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:55:28,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 73 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:55:28,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-23 03:55:28,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 22. [2021-11-23 03:55:28,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 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 03:55:28,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-11-23 03:55:28,817 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 11 [2021-11-23 03:55:28,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:55:28,818 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-11-23 03:55:28,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 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 03:55:28,818 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-11-23 03:55:28,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 03:55:28,818 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:55:28,819 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:55:28,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-23 03:55:29,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:55:29,019 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:55:29,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:55:29,020 INFO L85 PathProgramCache]: Analyzing trace with hash 985561389, now seen corresponding path program 1 times [2021-11-23 03:55:29,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:55:29,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066861318] [2021-11-23 03:55:29,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:55:29,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:55:29,032 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:55:29,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341959366] [2021-11-23 03:55:29,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:55:29,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:55:29,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:55:29,048 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:55:29,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 03:55:29,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 03:55:29,099 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 03:55:29,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 03:55:29,139 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 03:55:29,139 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 03:55:29,141 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 03:55:29,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 03:55:29,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:55:29,362 INFO L732 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1] [2021-11-23 03:55:29,364 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 03:55:29,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:55:29 BoogieIcfgContainer [2021-11-23 03:55:29,397 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 03:55:29,398 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 03:55:29,398 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 03:55:29,398 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 03:55:29,399 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:53:17" (3/4) ... [2021-11-23 03:55:29,401 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-23 03:55:29,443 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4dadfc7-e9a7-4831-ae02-7264bf5484a9/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 03:55:29,443 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 03:55:29,444 INFO L158 Benchmark]: Toolchain (without parser) took 132802.72ms. Allocated memory was 111.1MB in the beginning and 161.5MB in the end (delta: 50.3MB). Free memory was 73.1MB in the beginning and 133.0MB in the end (delta: -59.9MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:55:29,445 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 111.1MB. Free memory is still 89.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:55:29,445 INFO L158 Benchmark]: CACSL2BoogieTranslator took 338.72ms. Allocated memory is still 111.1MB. Free memory was 72.9MB in the beginning and 85.6MB in the end (delta: -12.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 03:55:29,446 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.72ms. Allocated memory is still 111.1MB. Free memory was 85.6MB in the beginning and 83.9MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:55:29,446 INFO L158 Benchmark]: Boogie Preprocessor took 51.14ms. Allocated memory is still 111.1MB. Free memory was 83.9MB in the beginning and 82.9MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:55:29,446 INFO L158 Benchmark]: RCFGBuilder took 517.40ms. Allocated memory is still 111.1MB. Free memory was 82.6MB in the beginning and 71.0MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 03:55:29,447 INFO L158 Benchmark]: TraceAbstraction took 131774.93ms. Allocated memory was 111.1MB in the beginning and 161.5MB in the end (delta: 50.3MB). Free memory was 70.3MB in the beginning and 135.1MB in the end (delta: -64.8MB). Peak memory consumption was 82.1MB. Max. memory is 16.1GB. [2021-11-23 03:55:29,448 INFO L158 Benchmark]: Witness Printer took 45.71ms. Allocated memory is still 161.5MB. Free memory was 135.1MB in the beginning and 133.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:55:29,450 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 111.1MB. Free memory is still 89.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 338.72ms. Allocated memory is still 111.1MB. Free memory was 72.9MB in the beginning and 85.6MB in the end (delta: -12.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.72ms. Allocated memory is still 111.1MB. Free memory was 85.6MB in the beginning and 83.9MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 51.14ms. Allocated memory is still 111.1MB. Free memory was 83.9MB in the beginning and 82.9MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 517.40ms. Allocated memory is still 111.1MB. Free memory was 82.6MB in the beginning and 71.0MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 131774.93ms. Allocated memory was 111.1MB in the beginning and 161.5MB in the end (delta: 50.3MB). Free memory was 70.3MB in the beginning and 135.1MB in the end (delta: -64.8MB). Peak memory consumption was 82.1MB. Max. memory is 16.1GB. * Witness Printer took 45.71ms. Allocated memory is still 161.5MB. Free memory was 135.1MB in the beginning and 133.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 8 [L32] b[0] = 1 [L34] i=1 VAL [a={-1:0}, b={-2:0}, i=1, N=2] [L34] COND TRUE i