./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/diff-3-n-u.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_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/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_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/diff-3-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/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_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/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 ae698f02be6e3657db0e7ca3e62c4cfb121d43a876624ed4d21d19b033e0c02e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:31:17,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:31:17,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:31:17,936 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:31:17,936 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:31:17,938 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:31:17,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:31:17,942 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:31:17,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:31:17,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:31:17,946 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:31:17,948 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:31:17,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:31:17,949 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:31:17,951 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:31:17,952 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:31:17,953 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:31:17,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:31:17,957 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:31:17,959 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:31:17,961 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:31:17,962 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:31:17,964 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:31:17,965 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:31:17,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:31:17,969 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:31:17,969 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:31:17,971 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:31:17,971 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:31:17,972 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:31:17,973 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:31:17,974 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:31:17,975 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:31:17,976 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:31:17,977 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:31:17,978 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:31:17,979 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:31:17,979 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:31:17,979 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:31:17,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:31:17,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:31:17,982 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:31:18,008 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:31:18,008 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:31:18,009 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:31:18,009 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:31:18,010 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:31:18,010 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:31:18,010 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:31:18,010 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:31:18,010 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:31:18,011 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:31:18,011 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:31:18,011 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:31:18,011 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:31:18,012 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:31:18,012 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:31:18,012 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:31:18,012 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:31:18,012 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:31:18,013 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:31:18,013 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:31:18,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:31:18,014 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:31:18,014 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:31:18,014 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:31:18,014 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:31:18,015 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:31:18,015 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:31:18,015 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:31:18,015 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:31:18,016 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:31:18,016 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:31:18,016 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:31:18,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:31:18,016 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:31:18,017 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:31:18,017 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:31:18,017 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:31:18,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:31:18,018 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:31:18,018 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:31:18,018 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:31:18,018 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_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ae698f02be6e3657db0e7ca3e62c4cfb121d43a876624ed4d21d19b033e0c02e [2021-11-23 03:31:18,276 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:31:18,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:31:18,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:31:18,306 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:31:18,308 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:31:18,310 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-multidimensional/diff-3-n-u.c [2021-11-23 03:31:18,369 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/data/7c041e7c0/23524dcd13cb4523bb9e1a363ee91a44/FLAG51d154255 [2021-11-23 03:31:18,789 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:31:18,790 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/sv-benchmarks/c/array-multidimensional/diff-3-n-u.c [2021-11-23 03:31:18,796 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/data/7c041e7c0/23524dcd13cb4523bb9e1a363ee91a44/FLAG51d154255 [2021-11-23 03:31:19,189 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/data/7c041e7c0/23524dcd13cb4523bb9e1a363ee91a44 [2021-11-23 03:31:19,191 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:31:19,193 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:31:19,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:31:19,195 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:31:19,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:31:19,199 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:31:19" (1/1) ... [2021-11-23 03:31:19,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e441db3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:19, skipping insertion in model container [2021-11-23 03:31:19,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:31:19" (1/1) ... [2021-11-23 03:31:19,207 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:31:19,224 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:31:19,420 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_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/sv-benchmarks/c/array-multidimensional/diff-3-n-u.c[322,335] [2021-11-23 03:31:19,471 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:31:19,482 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:31:19,497 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_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/sv-benchmarks/c/array-multidimensional/diff-3-n-u.c[322,335] [2021-11-23 03:31:19,528 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:31:19,550 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:31:19,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:19 WrapperNode [2021-11-23 03:31:19,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:31:19,552 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:31:19,552 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:31:19,552 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:31:19,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:19" (1/1) ... [2021-11-23 03:31:19,578 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:19" (1/1) ... [2021-11-23 03:31:19,610 INFO L137 Inliner]: procedures = 14, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 118 [2021-11-23 03:31:19,611 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:31:19,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:31:19,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:31:19,612 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:31:19,620 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:19" (1/1) ... [2021-11-23 03:31:19,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:19" (1/1) ... [2021-11-23 03:31:19,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:19" (1/1) ... [2021-11-23 03:31:19,633 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:19" (1/1) ... [2021-11-23 03:31:19,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:19" (1/1) ... [2021-11-23 03:31:19,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:19" (1/1) ... [2021-11-23 03:31:19,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:19" (1/1) ... [2021-11-23 03:31:19,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:31:19,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:31:19,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:31:19,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:31:19,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:19" (1/1) ... [2021-11-23 03:31:19,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:31:19,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:31:19,694 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:31:19,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:31:19,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:31:19,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:31:19,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:31:19,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:31:19,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:31:19,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:31:19,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:31:19,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:31:19,796 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:31:19,797 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:31:19,964 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:31:20,006 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:31:20,007 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-23 03:31:20,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:31:20 BoogieIcfgContainer [2021-11-23 03:31:20,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:31:20,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:31:20,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:31:20,015 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:31:20,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:31:19" (1/3) ... [2021-11-23 03:31:20,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e435dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:31:20, skipping insertion in model container [2021-11-23 03:31:20,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:31:19" (2/3) ... [2021-11-23 03:31:20,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e435dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:31:20, skipping insertion in model container [2021-11-23 03:31:20,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:31:20" (3/3) ... [2021-11-23 03:31:20,018 INFO L111 eAbstractionObserver]: Analyzing ICFG diff-3-n-u.c [2021-11-23 03:31:20,023 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:31:20,023 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:31:20,094 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:31:20,113 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 03:31:20,114 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:31:20,131 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 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 03:31:20,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 03:31:20,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:20,138 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:20,138 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:20,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:20,144 INFO L85 PathProgramCache]: Analyzing trace with hash 2125816706, now seen corresponding path program 1 times [2021-11-23 03:31:20,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:20,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736337531] [2021-11-23 03:31:20,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:20,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:20,257 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:31:20,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981369930] [2021-11-23 03:31:20,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:20,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:31:20,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:31:20,262 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:31:20,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:31:20,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:20,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:31:20,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:31:20,483 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 03:31:20,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:31:20,484 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:20,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736337531] [2021-11-23 03:31:20,484 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:31:20,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981369930] [2021-11-23 03:31:20,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981369930] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:20,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:20,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:31:20,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217180512] [2021-11-23 03:31:20,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:20,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:31:20,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:20,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:31:20,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:31:20,525 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 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) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 03:31:20,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:20,587 INFO L93 Difference]: Finished difference Result 29 states and 47 transitions. [2021-11-23 03:31:20,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:31:20,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 03:31:20,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:20,598 INFO L225 Difference]: With dead ends: 29 [2021-11-23 03:31:20,599 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 03:31:20,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:31:20,606 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:20,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:31:20,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 03:31:20,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2021-11-23 03:31:20,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 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 03:31:20,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 23 transitions. [2021-11-23 03:31:20,642 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 23 transitions. Word has length 8 [2021-11-23 03:31:20,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:20,643 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 23 transitions. [2021-11-23 03:31:20,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 03:31:20,644 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 23 transitions. [2021-11-23 03:31:20,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 03:31:20,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:20,645 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:20,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:31:20,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-23 03:31:20,862 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:20,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:20,863 INFO L85 PathProgramCache]: Analyzing trace with hash -952978249, now seen corresponding path program 1 times [2021-11-23 03:31:20,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:20,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500831689] [2021-11-23 03:31:20,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:20,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:20,870 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:31:20,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224887573] [2021-11-23 03:31:20,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:20,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:31:20,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:31:20,873 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:31:20,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:31:20,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:20,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:31:20,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:31:21,013 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 03:31:21,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:31:21,014 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:21,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500831689] [2021-11-23 03:31:21,014 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:31:21,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224887573] [2021-11-23 03:31:21,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224887573] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:21,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:21,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:31:21,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464245703] [2021-11-23 03:31:21,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:21,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:31:21,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:21,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:31:21,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:21,018 INFO L87 Difference]: Start difference. First operand 15 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 03:31:21,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:21,098 INFO L93 Difference]: Finished difference Result 40 states and 63 transitions. [2021-11-23 03:31:21,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:31:21,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 03:31:21,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:21,100 INFO L225 Difference]: With dead ends: 40 [2021-11-23 03:31:21,101 INFO L226 Difference]: Without dead ends: 27 [2021-11-23 03:31:21,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:21,103 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 45 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:21,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 11 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:31:21,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-23 03:31:21,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2021-11-23 03:31:21,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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 03:31:21,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 26 transitions. [2021-11-23 03:31:21,120 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 26 transitions. Word has length 10 [2021-11-23 03:31:21,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:21,121 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 26 transitions. [2021-11-23 03:31:21,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 03:31:21,121 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 26 transitions. [2021-11-23 03:31:21,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 03:31:21,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:21,123 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:21,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:31:21,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:31:21,346 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:21,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:21,347 INFO L85 PathProgramCache]: Analyzing trace with hash 821330551, now seen corresponding path program 1 times [2021-11-23 03:31:21,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:21,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775201778] [2021-11-23 03:31:21,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:21,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:21,353 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:31:21,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1120339824] [2021-11-23 03:31:21,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:21,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:31:21,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:31:21,362 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:31:21,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:31:21,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:21,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:31:21,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:31:21,466 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 03:31:21,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:31:21,467 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:21,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775201778] [2021-11-23 03:31:21,467 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:31:21,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120339824] [2021-11-23 03:31:21,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120339824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:21,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:21,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:31:21,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156076118] [2021-11-23 03:31:21,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:21,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:31:21,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:21,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:31:21,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:21,470 INFO L87 Difference]: Start difference. First operand 18 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 03:31:21,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:21,526 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2021-11-23 03:31:21,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:31:21,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2021-11-23 03:31:21,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:21,527 INFO L225 Difference]: With dead ends: 43 [2021-11-23 03:31:21,528 INFO L226 Difference]: Without dead ends: 27 [2021-11-23 03:31:21,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:21,530 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:21,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 12 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:31:21,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-23 03:31:21,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2021-11-23 03:31:21,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 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 03:31:21,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2021-11-23 03:31:21,538 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 12 [2021-11-23 03:31:21,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:21,539 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2021-11-23 03:31:21,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 03:31:21,539 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2021-11-23 03:31:21,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 03:31:21,540 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:21,540 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:21,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:31:21,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:31:21,766 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:21,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:21,766 INFO L85 PathProgramCache]: Analyzing trace with hash 66772088, now seen corresponding path program 1 times [2021-11-23 03:31:21,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:21,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735627906] [2021-11-23 03:31:21,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:21,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:21,771 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:31:21,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [551045543] [2021-11-23 03:31:21,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:21,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:31:21,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:31:21,777 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:31:21,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:31:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:21,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:31:21,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:31:21,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:31:21,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:31:21,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:31:21,944 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:21,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735627906] [2021-11-23 03:31:21,944 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:31:21,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551045543] [2021-11-23 03:31:21,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551045543] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:31:21,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [455885647] [2021-11-23 03:31:21,969 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 03:31:21,969 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:31:21,974 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:31:21,979 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:31:21,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:31:22,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:22,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:22,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:22,190 INFO L354 Elim1Store]: treesize reduction 178, result has 22.3 percent of original size [2021-11-23 03:31:22,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 76 [2021-11-23 03:31:22,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:22,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:22,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:22,429 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-23 03:31:22,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-23 03:31:22,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:22,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:22,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 61 [2021-11-23 03:31:22,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:22,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:22,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:22,928 INFO L354 Elim1Store]: treesize reduction 172, result has 15.7 percent of original size [2021-11-23 03:31:22,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 472 treesize of output 440 [2021-11-23 03:31:23,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:23,076 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:31:23,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:31:23,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:23,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:23,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:23,477 INFO L354 Elim1Store]: treesize reduction 168, result has 17.6 percent of original size [2021-11-23 03:31:23,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 299 treesize of output 279 [2021-11-23 03:31:23,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:23,589 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:31:23,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:31:23,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:23,862 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:31:23,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:31:23,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:23,943 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:31:23,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:31:24,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:24,144 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-23 03:31:24,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-23 03:31:24,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:24,218 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:31:24,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:31:24,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:24,463 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-23 03:31:24,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-23 03:31:24,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:24,536 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:31:24,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:31:24,548 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:31:24,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [455885647] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:24,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:31:24,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2021-11-23 03:31:24,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582052160] [2021-11-23 03:31:24,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:24,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:31:24,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:24,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:31:24,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:31:24,918 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 03:31:25,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:25,033 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2021-11-23 03:31:25,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:31:25,034 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 13 [2021-11-23 03:31:25,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:25,034 INFO L225 Difference]: With dead ends: 42 [2021-11-23 03:31:25,035 INFO L226 Difference]: Without dead ends: 33 [2021-11-23 03:31:25,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:31:25,036 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:25,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 6 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:31:25,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-23 03:31:25,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2021-11-23 03:31:25,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 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 03:31:25,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2021-11-23 03:31:25,047 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 13 [2021-11-23 03:31:25,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:25,047 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2021-11-23 03:31:25,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 03:31:25,048 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2021-11-23 03:31:25,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 03:31:25,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:25,049 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:25,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:31:25,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:31:25,265 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:25,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:25,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1959799413, now seen corresponding path program 1 times [2021-11-23 03:31:25,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:25,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872805916] [2021-11-23 03:31:25,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:25,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:25,271 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:31:25,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638090926] [2021-11-23 03:31:25,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:25,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:31:25,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:31:25,273 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:31:25,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:31:25,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:25,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:31:25,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:31:25,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:31:25,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:31:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:31:25,424 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:25,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872805916] [2021-11-23 03:31:25,425 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:31:25,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638090926] [2021-11-23 03:31:25,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638090926] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:31:25,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2124178561] [2021-11-23 03:31:25,430 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-23 03:31:25,430 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:31:25,431 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:31:25,431 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:31:25,431 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:31:25,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:25,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:25,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:25,586 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-23 03:31:25,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-23 03:31:25,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:25,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:25,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:25,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 58 [2021-11-23 03:31:25,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:25,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:25,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 69 [2021-11-23 03:31:25,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:25,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:25,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:25,887 INFO L354 Elim1Store]: treesize reduction 172, result has 15.7 percent of original size [2021-11-23 03:31:25,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 470 treesize of output 438 [2021-11-23 03:31:25,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:26,001 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:31:26,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:31:26,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:26,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:26,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:26,294 INFO L354 Elim1Store]: treesize reduction 144, result has 18.2 percent of original size [2021-11-23 03:31:26,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 287 treesize of output 271 [2021-11-23 03:31:26,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:26,376 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:31:26,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:31:26,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:26,598 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-23 03:31:26,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-23 03:31:26,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:26,672 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:31:26,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:31:26,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:26,843 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:31:26,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:31:26,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:26,881 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:31:26,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:31:26,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:26,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:27,034 INFO L354 Elim1Store]: treesize reduction 54, result has 51.4 percent of original size [2021-11-23 03:31:27,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 79 [2021-11-23 03:31:27,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:27,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:27,394 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-23 03:31:27,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-23 03:31:27,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:27,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:27,725 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-23 03:31:27,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-23 03:31:27,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:27,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:27,960 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-23 03:31:27,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-23 03:31:28,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:28,296 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:31:28,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:31:28,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:28,338 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:31:28,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:31:28,346 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:31:28,989 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '708#(and (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~p~0#1| 4) |ULTIMATE.start_main_~n~0#1|))))) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)) |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~p~0#1| 4) |ULTIMATE.start_main_~n~0#1|)))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (ite (= (mod |ULTIMATE.start_main_#t~mem10#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~p~0#1| 4) |ULTIMATE.start_main_~n~0#1|))))) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~p~0#1| 1800) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2021-11-23 03:31:28,989 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:31:28,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:31:28,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-23 03:31:28,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773054391] [2021-11-23 03:31:28,989 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:31:28,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:31:28,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:28,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:31:28,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:31:28,991 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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 03:31:29,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:29,120 INFO L93 Difference]: Finished difference Result 64 states and 89 transitions. [2021-11-23 03:31:29,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:31:29,121 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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 18 [2021-11-23 03:31:29,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:29,122 INFO L225 Difference]: With dead ends: 64 [2021-11-23 03:31:29,122 INFO L226 Difference]: Without dead ends: 44 [2021-11-23 03:31:29,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 10 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:31:29,123 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 41 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:29,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 18 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:31:29,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-23 03:31:29,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-11-23 03:31:29,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 states have internal predecessors, (48), 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 03:31:29,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-11-23 03:31:29,136 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 18 [2021-11-23 03:31:29,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:29,136 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-11-23 03:31:29,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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 03:31:29,136 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-11-23 03:31:29,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 03:31:29,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:29,137 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:29,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:31:29,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:31:29,359 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:29,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:29,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1426358148, now seen corresponding path program 2 times [2021-11-23 03:31:29,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:29,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027630526] [2021-11-23 03:31:29,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:29,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:29,365 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:31:29,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [367534708] [2021-11-23 03:31:29,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:31:29,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:31:29,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:31:29,367 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:31:29,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:31:29,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 03:31:29,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:31:29,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:31:29,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:31:29,515 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-23 03:31:29,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:31:29,586 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-23 03:31:29,586 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:29,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027630526] [2021-11-23 03:31:29,586 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:31:29,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367534708] [2021-11-23 03:31:29,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367534708] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:31:29,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2083471908] [2021-11-23 03:31:29,590 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-23 03:31:29,591 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:31:29,591 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:31:29,591 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:31:29,592 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:31:29,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:29,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:29,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:29,695 INFO L354 Elim1Store]: treesize reduction 178, result has 22.3 percent of original size [2021-11-23 03:31:29,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 76 [2021-11-23 03:31:29,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:29,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:29,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:29,852 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-23 03:31:29,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-23 03:31:29,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:29,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:29,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 69 [2021-11-23 03:31:30,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:30,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:30,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:30,094 INFO L354 Elim1Store]: treesize reduction 172, result has 15.7 percent of original size [2021-11-23 03:31:30,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 470 treesize of output 438 [2021-11-23 03:31:30,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:30,205 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:31:30,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:31:30,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:30,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:31:30,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:30,501 INFO L354 Elim1Store]: treesize reduction 168, result has 17.6 percent of original size [2021-11-23 03:31:30,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 299 treesize of output 279 [2021-11-23 03:31:30,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:30,583 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:31:30,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:31:30,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:30,838 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:31:30,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:31:30,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:30,903 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:31:30,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:31:31,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:31,076 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:31:31,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:31:31,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:31,114 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:31:31,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:31:31,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:31,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:31,301 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-23 03:31:31,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-23 03:31:31,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:31,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:31,428 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-23 03:31:31,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-23 03:31:31,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:31,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:31,682 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-23 03:31:31,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-23 03:31:31,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:31,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:31,890 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-23 03:31:31,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-23 03:31:32,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:32,204 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:31:32,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:31:32,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:31:32,248 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:31:32,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:31:32,256 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:31:32,847 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1042#(and (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~p~0#1| 4) |ULTIMATE.start_main_~n~0#1|))))) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)) |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~p~0#1| 4) |ULTIMATE.start_main_~n~0#1|)))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (ite (= (mod |ULTIMATE.start_main_#t~mem10#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~p~0#1| 4) |ULTIMATE.start_main_~n~0#1|))))) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~p~0#1| 1800) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2021-11-23 03:31:32,847 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:31:32,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:31:32,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-23 03:31:32,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400233467] [2021-11-23 03:31:32,848 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:31:32,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:31:32,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:32,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:31:32,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:31:32,850 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 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 03:31:33,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:33,005 INFO L93 Difference]: Finished difference Result 167 states and 219 transitions. [2021-11-23 03:31:33,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:31:33,006 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 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 24 [2021-11-23 03:31:33,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:33,009 INFO L225 Difference]: With dead ends: 167 [2021-11-23 03:31:33,009 INFO L226 Difference]: Without dead ends: 140 [2021-11-23 03:31:33,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 13 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:31:33,010 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 114 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:33,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 28 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:31:33,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-23 03:31:33,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 85. [2021-11-23 03:31:33,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2857142857142858) internal successors, (108), 84 states have internal predecessors, (108), 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 03:31:33,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 108 transitions. [2021-11-23 03:31:33,040 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 108 transitions. Word has length 24 [2021-11-23 03:31:33,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:33,040 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 108 transitions. [2021-11-23 03:31:33,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 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 03:31:33,041 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 108 transitions. [2021-11-23 03:31:33,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 03:31:33,043 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:33,043 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:33,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:31:33,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 03:31:33,267 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:33,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:33,267 INFO L85 PathProgramCache]: Analyzing trace with hash -618004630, now seen corresponding path program 3 times [2021-11-23 03:31:33,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:33,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276125107] [2021-11-23 03:31:33,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:33,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:33,281 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:31:33,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1192937660] [2021-11-23 03:31:33,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:31:33,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:31:33,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:31:33,282 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:31:33,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:44:03,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:44:03,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:44:03,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:44:03,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:44:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 151 proven. 1 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2021-11-23 03:44:04,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:44:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 122 proven. 30 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2021-11-23 03:44:04,335 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:44:04,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276125107] [2021-11-23 03:44:04,335 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:44:04,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192937660] [2021-11-23 03:44:04,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192937660] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:44:04,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [64617859] [2021-11-23 03:44:04,340 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-23 03:44:04,340 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:44:04,341 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:44:04,341 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:44:04,341 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:44:04,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:04,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:04,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:04,511 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-23 03:44:04,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-23 03:44:04,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:04,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:04,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:04,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 58 [2021-11-23 03:44:04,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:04,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:04,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 69 [2021-11-23 03:44:04,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:04,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:04,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:04,839 INFO L354 Elim1Store]: treesize reduction 172, result has 15.7 percent of original size [2021-11-23 03:44:04,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 470 treesize of output 438 [2021-11-23 03:44:04,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:04,954 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:44:04,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:44:05,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:05,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:05,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:05,207 INFO L354 Elim1Store]: treesize reduction 168, result has 17.6 percent of original size [2021-11-23 03:44:05,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 299 treesize of output 279 [2021-11-23 03:44:05,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:05,321 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:44:05,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:44:05,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:05,611 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-23 03:44:05,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-23 03:44:05,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:05,661 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:44:05,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:44:05,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:05,854 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-23 03:44:05,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-23 03:44:05,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:05,927 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:44:05,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:44:06,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:06,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:06,141 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-23 03:44:06,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-23 03:44:06,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:06,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:06,274 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-23 03:44:06,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-23 03:44:06,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:06,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:06,571 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-23 03:44:06,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-23 03:44:06,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:06,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:06,843 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-23 03:44:06,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-23 03:44:07,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:07,219 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-23 03:44:07,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-23 03:44:07,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:07,273 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:44:07,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:44:07,284 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:44:08,410 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1951#(and (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~p~0#1| 4) |ULTIMATE.start_main_~n~0#1|))))) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)) |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~p~0#1| 4) |ULTIMATE.start_main_~n~0#1|)))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (ite (= (mod |ULTIMATE.start_main_#t~mem10#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~p~0#1| 4) |ULTIMATE.start_main_~n~0#1|))))) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~p~0#1| 1800) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2021-11-23 03:44:08,411 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:44:08,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:44:08,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-23 03:44:08,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095288798] [2021-11-23 03:44:08,411 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:44:08,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:44:08,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:44:08,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:44:08,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:44:08,413 INFO L87 Difference]: Start difference. First operand 85 states and 108 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 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 03:44:08,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:44:08,647 INFO L93 Difference]: Finished difference Result 354 states and 461 transitions. [2021-11-23 03:44:08,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:44:08,647 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 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 72 [2021-11-23 03:44:08,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:44:08,651 INFO L225 Difference]: With dead ends: 354 [2021-11-23 03:44:08,651 INFO L226 Difference]: Without dead ends: 278 [2021-11-23 03:44:08,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 160 SyntacticMatches, 43 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:44:08,653 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 126 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:44:08,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 19 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:44:08,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-23 03:44:08,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 271. [2021-11-23 03:44:08,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.2333333333333334) internal successors, (333), 270 states have internal predecessors, (333), 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 03:44:08,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 333 transitions. [2021-11-23 03:44:08,740 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 333 transitions. Word has length 72 [2021-11-23 03:44:08,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:44:08,740 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 333 transitions. [2021-11-23 03:44:08,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 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 03:44:08,741 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 333 transitions. [2021-11-23 03:44:08,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-23 03:44:08,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:44:08,746 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 16, 16, 16, 16, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:44:08,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:44:08,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 03:44:08,963 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:44:08,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:44:08,964 INFO L85 PathProgramCache]: Analyzing trace with hash -655371538, now seen corresponding path program 4 times [2021-11-23 03:44:08,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:44:08,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224294318] [2021-11-23 03:44:08,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:44:08,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:44:08,987 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:44:08,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125727233] [2021-11-23 03:44:08,988 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:44:08,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:44:08,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:44:09,006 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:44:09,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 03:44:09,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:44:09,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 03:44:09,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:44:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6720 backedges. 398 proven. 10 refuted. 0 times theorem prover too weak. 6312 trivial. 0 not checked. [2021-11-23 03:44:09,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:44:10,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6720 backedges. 398 proven. 10 refuted. 0 times theorem prover too weak. 6312 trivial. 0 not checked. [2021-11-23 03:44:10,197 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:44:10,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224294318] [2021-11-23 03:44:10,197 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:44:10,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125727233] [2021-11-23 03:44:10,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125727233] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:44:10,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1992809224] [2021-11-23 03:44:10,201 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-23 03:44:10,201 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:44:10,201 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:44:10,202 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:44:10,202 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:44:10,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:10,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:10,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:10,351 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-23 03:44:10,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2021-11-23 03:44:10,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:10,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:10,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:10,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 58 [2021-11-23 03:44:10,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:10,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:10,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 61 [2021-11-23 03:44:10,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:10,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:10,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:10,728 INFO L354 Elim1Store]: treesize reduction 172, result has 15.7 percent of original size [2021-11-23 03:44:10,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 472 treesize of output 440 [2021-11-23 03:44:10,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:10,847 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:44:10,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:44:11,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:11,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:11,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:11,266 INFO L354 Elim1Store]: treesize reduction 144, result has 18.2 percent of original size [2021-11-23 03:44:11,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 287 treesize of output 271 [2021-11-23 03:44:11,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:11,368 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:44:11,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:44:11,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:11,589 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:44:11,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:44:11,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:11,646 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:44:11,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:44:11,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:11,775 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:44:11,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:44:11,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:11,825 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:44:11,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:44:11,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:11,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:11,970 INFO L354 Elim1Store]: treesize reduction 54, result has 51.4 percent of original size [2021-11-23 03:44:11,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 79 [2021-11-23 03:44:12,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:12,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:12,251 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-23 03:44:12,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-23 03:44:12,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:12,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:12,625 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-23 03:44:12,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-23 03:44:12,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:12,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:12,837 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-23 03:44:12,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 91 [2021-11-23 03:44:13,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:13,209 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-23 03:44:13,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-23 03:44:13,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:13,266 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-23 03:44:13,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 53 [2021-11-23 03:44:13,284 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:44:15,865 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4464#(and (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~p~0#1| 4) |ULTIMATE.start_main_~n~0#1|))))) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)) |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~p~0#1| 4) |ULTIMATE.start_main_~n~0#1|)))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (ite (= (mod |ULTIMATE.start_main_#t~mem10#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~p~0#1| 4) |ULTIMATE.start_main_~n~0#1|))))) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~p~0#1| 1800) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2021-11-23 03:44:15,865 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:44:15,865 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:44:15,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-23 03:44:15,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305710986] [2021-11-23 03:44:15,865 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:44:15,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:44:15,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:44:15,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:44:15,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:44:15,867 INFO L87 Difference]: Start difference. First operand 271 states and 333 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 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 03:44:16,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:44:16,279 INFO L93 Difference]: Finished difference Result 817 states and 1171 transitions. [2021-11-23 03:44:16,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 03:44:16,280 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 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 216 [2021-11-23 03:44:16,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:44:16,286 INFO L225 Difference]: With dead ends: 817 [2021-11-23 03:44:16,286 INFO L226 Difference]: Without dead ends: 554 [2021-11-23 03:44:16,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 502 SyntacticMatches, 127 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2346 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=226, Invalid=326, Unknown=0, NotChecked=0, Total=552 [2021-11-23 03:44:16,290 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 113 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:44:16,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 36 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:44:16,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-11-23 03:44:16,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 535. [2021-11-23 03:44:16,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 1.1629213483146068) internal successors, (621), 534 states have internal predecessors, (621), 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 03:44:16,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 621 transitions. [2021-11-23 03:44:16,428 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 621 transitions. Word has length 216 [2021-11-23 03:44:16,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:44:16,428 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 621 transitions. [2021-11-23 03:44:16,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 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 03:44:16,429 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 621 transitions. [2021-11-23 03:44:16,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-11-23 03:44:16,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:44:16,439 INFO L514 BasicCegarLoop]: trace histogram [160, 160, 16, 16, 16, 16, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:44:16,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 03:44:16,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:44:16,659 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:44:16,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:44:16,659 INFO L85 PathProgramCache]: Analyzing trace with hash 792008942, now seen corresponding path program 5 times [2021-11-23 03:44:16,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:44:16,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888638539] [2021-11-23 03:44:16,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:44:16,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:44:16,695 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:44:16,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [948129540] [2021-11-23 03:44:16,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:44:16,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:44:16,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:44:16,697 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:44:16,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a5ca5c1-c846-4747-8a34-d8b7ff0de8d6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process