./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifcompf.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_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/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_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ifcompf.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/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_2a78ed67-3f13-40ad-855e-37a56a596d36/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 c976745169334e455668d4a00daf76f0c92e9088cf6a3d705adecbf8b82b6740 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:00:13,466 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:00:13,470 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:00:13,539 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:00:13,540 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:00:13,545 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:00:13,547 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:00:13,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:00:13,555 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:00:13,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:00:13,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:00:13,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:00:13,566 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:00:13,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:00:13,572 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:00:13,586 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:00:13,588 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:00:13,590 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:00:13,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:00:13,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:00:13,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:00:13,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:00:13,610 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:00:13,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:00:13,623 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:00:13,624 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:00:13,624 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:00:13,627 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:00:13,628 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:00:13,630 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:00:13,630 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:00:13,632 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:00:13,634 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:00:13,636 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:00:13,638 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:00:13,638 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:00:13,639 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:00:13,640 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:00:13,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:00:13,642 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:00:13,643 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:00:13,644 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:00:13,701 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:00:13,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:00:13,703 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:00:13,703 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:00:13,712 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:00:13,712 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:00:13,713 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:00:13,713 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:00:13,713 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:00:13,714 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:00:13,715 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:00:13,715 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:00:13,716 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:00:13,716 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:00:13,716 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:00:13,717 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:00:13,717 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:00:13,717 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:00:13,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:00:13,719 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:00:13,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:00:13,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:00:13,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:00:13,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:00:13,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:00:13,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:00:13,722 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:00:13,723 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:00:13,723 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:00:13,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:00:13,724 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:00:13,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:00:13,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:00:13,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:00:13,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:00:13,726 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:00:13,726 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:00:13,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:00:13,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:00:13,727 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:00:13,727 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:00:13,727 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_2a78ed67-3f13-40ad-855e-37a56a596d36/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c976745169334e455668d4a00daf76f0c92e9088cf6a3d705adecbf8b82b6740 [2021-11-23 02:00:14,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:00:14,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:00:14,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:00:14,149 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:00:14,150 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:00:14,152 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-fpi/ifcompf.c [2021-11-23 02:00:14,246 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/data/319cfdc33/a2329c957cbd4b1da192df21a147dae1/FLAG4e8cbaf45 [2021-11-23 02:00:14,766 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:00:14,767 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/sv-benchmarks/c/array-fpi/ifcompf.c [2021-11-23 02:00:14,781 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/data/319cfdc33/a2329c957cbd4b1da192df21a147dae1/FLAG4e8cbaf45 [2021-11-23 02:00:15,133 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/data/319cfdc33/a2329c957cbd4b1da192df21a147dae1 [2021-11-23 02:00:15,136 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:00:15,138 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:00:15,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:00:15,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:00:15,156 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:00:15,157 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:00:15" (1/1) ... [2021-11-23 02:00:15,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31796bd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:00:15, skipping insertion in model container [2021-11-23 02:00:15,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:00:15" (1/1) ... [2021-11-23 02:00:15,171 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:00:15,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:00:15,413 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_2a78ed67-3f13-40ad-855e-37a56a596d36/sv-benchmarks/c/array-fpi/ifcompf.c[590,603] [2021-11-23 02:00:15,440 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:00:15,451 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:00:15,466 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_2a78ed67-3f13-40ad-855e-37a56a596d36/sv-benchmarks/c/array-fpi/ifcompf.c[590,603] [2021-11-23 02:00:15,480 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:00:15,497 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:00:15,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:00:15 WrapperNode [2021-11-23 02:00:15,498 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:00:15,499 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:00:15,499 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:00:15,500 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:00:15,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:00:15" (1/1) ... [2021-11-23 02:00:15,519 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:00:15" (1/1) ... [2021-11-23 02:00:15,547 INFO L137 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 92 [2021-11-23 02:00:15,547 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:00:15,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:00:15,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:00:15,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:00:15,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:00:15" (1/1) ... [2021-11-23 02:00:15,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:00:15" (1/1) ... [2021-11-23 02:00:15,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:00:15" (1/1) ... [2021-11-23 02:00:15,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:00:15" (1/1) ... [2021-11-23 02:00:15,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:00:15" (1/1) ... [2021-11-23 02:00:15,578 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:00:15" (1/1) ... [2021-11-23 02:00:15,580 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:00:15" (1/1) ... [2021-11-23 02:00:15,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:00:15,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:00:15,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:00:15,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:00:15,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:00:15" (1/1) ... [2021-11-23 02:00:15,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:00:15,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:00:15,634 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:00:15,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:00:15,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:00:15,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:00:15,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:00:15,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:00:15,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:00:15,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:00:15,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:00:15,775 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:00:15,777 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:00:15,991 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:00:16,086 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:00:16,086 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-23 02:00:16,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:00:16 BoogieIcfgContainer [2021-11-23 02:00:16,089 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:00:16,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:00:16,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:00:16,096 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:00:16,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:00:15" (1/3) ... [2021-11-23 02:00:16,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e753db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:00:16, skipping insertion in model container [2021-11-23 02:00:16,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:00:15" (2/3) ... [2021-11-23 02:00:16,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e753db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:00:16, skipping insertion in model container [2021-11-23 02:00:16,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:00:16" (3/3) ... [2021-11-23 02:00:16,100 INFO L111 eAbstractionObserver]: Analyzing ICFG ifcompf.c [2021-11-23 02:00:16,106 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:00:16,106 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:00:16,168 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:00:16,177 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:00:16,178 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:00:16,212 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:00:16,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 02:00:16,219 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:00:16,220 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:00:16,221 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:00:16,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:00:16,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1718302181, now seen corresponding path program 1 times [2021-11-23 02:00:16,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:00:16,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240003896] [2021-11-23 02:00:16,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:00:16,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:00:16,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:00:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:00:16,642 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:00:16,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240003896] [2021-11-23 02:00:16,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240003896] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:00:16,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:00:16,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:00:16,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747460029] [2021-11-23 02:00:16,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:00:16,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:00:16,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:00:16,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:00:16,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:00:16,690 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 02:00:16,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:00:16,755 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2021-11-23 02:00:16,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:00:16,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 02:00:16,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:00:16,768 INFO L225 Difference]: With dead ends: 22 [2021-11-23 02:00:16,769 INFO L226 Difference]: Without dead ends: 11 [2021-11-23 02:00:16,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:00:16,777 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:00:16,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:00:16,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-23 02:00:16,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-23 02:00:16,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:00:16,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2021-11-23 02:00:16,819 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 8 [2021-11-23 02:00:16,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:00:16,820 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2021-11-23 02:00:16,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 02:00:16,821 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2021-11-23 02:00:16,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 02:00:16,821 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:00:16,822 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:00:16,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:00:16,822 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:00:16,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:00:16,823 INFO L85 PathProgramCache]: Analyzing trace with hash -278726234, now seen corresponding path program 1 times [2021-11-23 02:00:16,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:00:16,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816967415] [2021-11-23 02:00:16,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:00:16,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:00:16,886 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:00:16,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1289775243] [2021-11-23 02:00:16,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:00:16,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:00:16,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:00:16,891 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:00:16,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:00:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:00:16,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:00:16,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:00:17,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:00:17,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:00:17,069 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:00:17,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816967415] [2021-11-23 02:00:17,070 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:00:17,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289775243] [2021-11-23 02:00:17,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289775243] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:00:17,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:00:17,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:00:17,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435835832] [2021-11-23 02:00:17,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:00:17,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:00:17,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:00:17,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:00:17,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:00:17,076 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:00:17,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:00:17,146 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2021-11-23 02:00:17,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:00:17,148 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 02:00:17,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:00:17,150 INFO L225 Difference]: With dead ends: 24 [2021-11-23 02:00:17,150 INFO L226 Difference]: Without dead ends: 18 [2021-11-23 02:00:17,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 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 02:00:17,153 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:00:17,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 6 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:00:17,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-23 02:00:17,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2021-11-23 02:00:17,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:00:17,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-11-23 02:00:17,172 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2021-11-23 02:00:17,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:00:17,173 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-11-23 02:00:17,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:00:17,174 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-11-23 02:00:17,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 02:00:17,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:00:17,175 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:00:17,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-23 02:00:17,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-23 02:00:17,390 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:00:17,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:00:17,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1790599809, now seen corresponding path program 1 times [2021-11-23 02:00:17,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:00:17,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855245376] [2021-11-23 02:00:17,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:00:17,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:00:17,455 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:00:17,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1065096091] [2021-11-23 02:00:17,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:00:17,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:00:17,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:00:17,473 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:00:17,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:00:17,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:00:17,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:00:17,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:00:17,690 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:00:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:00:17,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:00:18,130 INFO L354 Elim1Store]: treesize reduction 150, result has 42.3 percent of original size [2021-11-23 02:00:18,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 74 treesize of output 143 [2021-11-23 02:00:18,439 INFO L354 Elim1Store]: treesize reduction 23, result has 54.9 percent of original size [2021-11-23 02:00:18,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 93 [2021-11-23 02:00:18,572 INFO L354 Elim1Store]: treesize reduction 48, result has 52.0 percent of original size [2021-11-23 02:00:18,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 75 [2021-11-23 02:00:18,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:00:18,722 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:00:18,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855245376] [2021-11-23 02:00:18,723 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:00:18,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065096091] [2021-11-23 02:00:18,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065096091] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:00:18,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [546448290] [2021-11-23 02:00:18,760 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 02:00:18,760 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:00:18,766 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:00:18,772 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:00:18,773 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:00:19,064 INFO L354 Elim1Store]: treesize reduction 185, result has 24.5 percent of original size [2021-11-23 02:00:19,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 76 [2021-11-23 02:00:19,398 INFO L354 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2021-11-23 02:00:19,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2021-11-23 02:00:19,511 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:00:19,521 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:00:19,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:19,668 INFO L354 Elim1Store]: treesize reduction 80, result has 13.0 percent of original size [2021-11-23 02:00:19,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 80 [2021-11-23 02:00:19,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:00:19,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 16 [2021-11-23 02:00:19,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:19,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 18 [2021-11-23 02:00:19,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:19,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-11-23 02:00:19,855 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:00:19,913 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:00:19,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:20,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:20,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:00:20,050 INFO L354 Elim1Store]: treesize reduction 143, result has 14.9 percent of original size [2021-11-23 02:00:20,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 110 [2021-11-23 02:00:20,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:20,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:00:20,123 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:00:20,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 39 [2021-11-23 02:00:20,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:00:20,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:00:20,155 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:00:20,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 51 [2021-11-23 02:00:20,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:20,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:20,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:00:20,233 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:00:20,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-23 02:00:20,244 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:00:20,298 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:00:20,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:20,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:20,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:00:20,431 INFO L354 Elim1Store]: treesize reduction 143, result has 14.9 percent of original size [2021-11-23 02:00:20,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 107 [2021-11-23 02:00:20,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:20,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:00:20,491 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:00:20,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 54 [2021-11-23 02:00:20,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:00:20,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:00:20,528 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:00:20,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 97 treesize of output 57 [2021-11-23 02:00:20,582 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:00:20,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:20,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:20,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:00:20,604 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:00:20,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-23 02:00:20,645 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:00:21,104 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '218#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1.offset|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-23 02:00:21,105 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:00:21,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:00:21,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-11-23 02:00:21,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774701288] [2021-11-23 02:00:21,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:00:21,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 02:00:21,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:00:21,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 02:00:21,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-23 02:00:21,108 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:00:21,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:00:21,272 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2021-11-23 02:00:21,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:00:21,273 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 02:00:21,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:00:21,274 INFO L225 Difference]: With dead ends: 19 [2021-11-23 02:00:21,274 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 02:00:21,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:00:21,276 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 22 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:00:21,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 15 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:00:21,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 02:00:21,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2021-11-23 02:00:21,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:00:21,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-11-23 02:00:21,282 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2021-11-23 02:00:21,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:00:21,283 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-11-23 02:00:21,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:00:21,283 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-11-23 02:00:21,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 02:00:21,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:00:21,284 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:00:21,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:00:21,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:00:21,485 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:00:21,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:00:21,486 INFO L85 PathProgramCache]: Analyzing trace with hash -259950584, now seen corresponding path program 1 times [2021-11-23 02:00:21,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:00:21,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182715611] [2021-11-23 02:00:21,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:00:21,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:00:21,512 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:00:21,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [992405215] [2021-11-23 02:00:21,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:00:21,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:00:21,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:00:21,514 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:00:21,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:00:21,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:00:21,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:00:21,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:00:21,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:00:21,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:00:21,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:00:21,728 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:00:21,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182715611] [2021-11-23 02:00:21,728 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:00:21,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992405215] [2021-11-23 02:00:21,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992405215] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:00:21,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1127831098] [2021-11-23 02:00:21,734 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:00:21,735 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:00:21,735 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:00:21,736 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:00:21,736 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:00:21,972 INFO L354 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2021-11-23 02:00:21,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2021-11-23 02:00:22,006 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 34 treesize of output 46 [2021-11-23 02:00:22,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-23 02:00:22,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:22,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:22,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:00:22,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:22,317 INFO L354 Elim1Store]: treesize reduction 156, result has 14.8 percent of original size [2021-11-23 02:00:22,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 456 treesize of output 477 [2021-11-23 02:00:22,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:22,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:00:22,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 30 [2021-11-23 02:00:22,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:22,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:00:22,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:22,620 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:00:22,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 460 treesize of output 409 [2021-11-23 02:00:22,783 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:00:22,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:22,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-11-23 02:00:22,812 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:00:22,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:22,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:22,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:00:22,908 INFO L354 Elim1Store]: treesize reduction 143, result has 14.9 percent of original size [2021-11-23 02:00:22,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 117 treesize of output 141 [2021-11-23 02:00:22,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:22,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:00:22,965 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:00:22,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 54 [2021-11-23 02:00:22,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:00:23,005 INFO L354 Elim1Store]: treesize reduction 29, result has 25.6 percent of original size [2021-11-23 02:00:23,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 67 [2021-11-23 02:00:23,054 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:00:23,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:23,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:23,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:00:23,069 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:00:23,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-23 02:00:23,097 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:00:23,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:23,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:23,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:00:23,200 INFO L354 Elim1Store]: treesize reduction 143, result has 14.9 percent of original size [2021-11-23 02:00:23,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 138 [2021-11-23 02:00:23,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:00:23,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:00:23,264 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:00:23,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 28 [2021-11-23 02:00:23,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:23,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:00:23,298 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:00:23,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 30 [2021-11-23 02:00:23,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:23,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:23,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:00:23,350 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:00:23,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-23 02:00:23,359 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:00:23,510 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:00:23,900 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '365#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 02:00:23,900 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:00:23,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:00:23,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-23 02:00:23,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133541308] [2021-11-23 02:00:23,901 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:00:23,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 02:00:23,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:00:23,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 02:00:23,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:00:23,903 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:00:24,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:00:24,041 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2021-11-23 02:00:24,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:00:24,042 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 02:00:24,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:00:24,043 INFO L225 Difference]: With dead ends: 42 [2021-11-23 02:00:24,044 INFO L226 Difference]: Without dead ends: 24 [2021-11-23 02:00:24,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-11-23 02:00:24,045 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 10 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:00:24,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 17 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:00:24,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-23 02:00:24,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2021-11-23 02:00:24,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:00:24,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-11-23 02:00:24,052 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 14 [2021-11-23 02:00:24,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:00:24,053 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-11-23 02:00:24,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:00:24,054 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-11-23 02:00:24,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 02:00:24,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:00:24,055 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:00:24,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-23 02:00:24,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:00:24,270 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:00:24,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:00:24,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1731625634, now seen corresponding path program 2 times [2021-11-23 02:00:24,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:00:24,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523642818] [2021-11-23 02:00:24,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:00:24,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:00:24,300 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:00:24,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1034935684] [2021-11-23 02:00:24,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:00:24,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:00:24,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:00:24,302 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:00:24,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:00:24,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 02:00:24,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:00:24,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 02:00:24,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:00:24,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-11-23 02:00:24,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:00:24,672 INFO L354 Elim1Store]: treesize reduction 158, result has 21.0 percent of original size [2021-11-23 02:00:24,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 65 [2021-11-23 02:00:24,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-23 02:00:24,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:00:24,871 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:00:24,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2021-11-23 02:00:25,133 INFO L354 Elim1Store]: treesize reduction 35, result has 18.6 percent of original size [2021-11-23 02:00:25,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 48 [2021-11-23 02:00:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:00:25,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:00:59,658 INFO L354 Elim1Store]: treesize reduction 150, result has 42.3 percent of original size [2021-11-23 02:00:59,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 276 treesize of output 345 [2021-11-23 02:01:01,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:02,013 INFO L354 Elim1Store]: treesize reduction 29, result has 31.0 percent of original size [2021-11-23 02:01:02,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 107 treesize of output 68 [2021-11-23 02:01:03,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:03,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 47 [2021-11-23 02:01:05,305 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:01:05,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 134 [2021-11-23 02:01:05,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:06,051 INFO L354 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2021-11-23 02:01:06,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 76 [2021-11-23 02:01:06,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:06,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:06,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:06,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 43 [2021-11-23 02:01:07,734 INFO L354 Elim1Store]: treesize reduction 569, result has 32.7 percent of original size [2021-11-23 02:01:07,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 757 treesize of output 687 [2021-11-23 02:01:07,873 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:01:07,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 753 treesize of output 729 [2021-11-23 02:01:08,084 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:01:08,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 729 treesize of output 737 [2021-11-23 02:01:08,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:08,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 86 [2021-11-23 02:01:13,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:13,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2021-11-23 02:01:14,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:14,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2021-11-23 02:01:19,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:19,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:19,672 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 02:01:19,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 26 [2021-11-23 02:01:19,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:19,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:19,735 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-23 02:01:19,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:19,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:19,789 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 02:01:19,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 26 [2021-11-23 02:01:19,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:19,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:19,840 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 02:01:19,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 26 [2021-11-23 02:01:20,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:20,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:20,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:21,143 INFO L354 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2021-11-23 02:01:21,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 57 [2021-11-23 02:01:21,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:21,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:21,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:21,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:21,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:21,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:21,356 INFO L354 Elim1Store]: treesize reduction 17, result has 78.8 percent of original size [2021-11-23 02:01:21,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 177 treesize of output 205 [2021-11-23 02:01:22,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:22,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:22,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:23,064 INFO L354 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2021-11-23 02:01:23,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 57 [2021-11-23 02:01:23,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:23,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:23,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:23,269 INFO L354 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2021-11-23 02:01:23,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 57 [2021-11-23 02:01:24,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:24,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:24,720 INFO L354 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2021-11-23 02:01:24,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 31 [2021-11-23 02:01:24,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:24,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:24,856 INFO L354 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2021-11-23 02:01:24,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 31 [2021-11-23 02:01:24,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:24,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:25,010 INFO L354 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2021-11-23 02:01:25,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 31 [2021-11-23 02:01:30,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:30,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:01:30,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:01:30,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 423 treesize of output 437 [2021-11-23 02:01:40,059 INFO L354 Elim1Store]: treesize reduction 93, result has 72.4 percent of original size [2021-11-23 02:01:40,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 2588 treesize of output 2630 [2021-11-23 02:01:40,602 INFO L354 Elim1Store]: treesize reduction 152, result has 66.1 percent of original size [2021-11-23 02:01:40,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 4205 treesize of output 3987 [2021-11-23 02:08:01,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:08:01,948 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:01,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523642818] [2021-11-23 02:08:01,948 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:08:01,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034935684] [2021-11-23 02:08:01,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034935684] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:08:01,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1150001093] [2021-11-23 02:08:01,951 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:08:01,951 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:08:01,952 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:08:01,952 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:08:01,952 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:08:02,186 INFO L354 Elim1Store]: treesize reduction 185, result has 24.5 percent of original size [2021-11-23 02:08:02,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 76 [2021-11-23 02:08:02,442 INFO L354 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2021-11-23 02:08:02,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2021-11-23 02:08:02,492 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:08:02,497 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:08:02,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:02,543 INFO L354 Elim1Store]: treesize reduction 80, result has 13.0 percent of original size [2021-11-23 02:08:02,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 80 [2021-11-23 02:08:02,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:02,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 27 [2021-11-23 02:08:02,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:08:02,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 43 [2021-11-23 02:08:02,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:02,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-11-23 02:08:02,637 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:08:02,661 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:08:02,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:02,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:02,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:02,731 INFO L354 Elim1Store]: treesize reduction 143, result has 14.9 percent of original size [2021-11-23 02:08:02,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 110 [2021-11-23 02:08:02,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:02,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:02,778 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:08:02,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 28 [2021-11-23 02:08:02,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:02,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:02,798 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:08:02,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 30 [2021-11-23 02:08:02,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:02,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:02,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:02,843 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:08:02,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-23 02:08:02,851 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:08:02,870 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:08:02,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:02,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:02,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:02,939 INFO L354 Elim1Store]: treesize reduction 143, result has 14.9 percent of original size [2021-11-23 02:08:02,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 110 [2021-11-23 02:08:02,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:02,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:02,965 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:08:02,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 39 [2021-11-23 02:08:02,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:03,001 INFO L354 Elim1Store]: treesize reduction 29, result has 25.6 percent of original size [2021-11-23 02:08:03,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 61 [2021-11-23 02:08:03,045 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:08:03,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:03,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:03,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:03,059 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:08:03,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-23 02:08:03,150 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:08:03,820 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '589#(and (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1.offset|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-23 02:08:03,820 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:08:03,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:08:03,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-11-23 02:08:03,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103135900] [2021-11-23 02:08:03,821 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:08:03,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 02:08:03,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:03,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 02:08:03,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=741, Unknown=12, NotChecked=0, Total=870 [2021-11-23 02:08:03,822 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 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 02:08:15,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:15,367 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2021-11-23 02:08:15,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 02:08:15,368 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 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 17 [2021-11-23 02:08:15,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:15,371 INFO L225 Difference]: With dead ends: 41 [2021-11-23 02:08:15,371 INFO L226 Difference]: Without dead ends: 34 [2021-11-23 02:08:15,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 44.9s TimeCoverageRelationStatistics Valid=137, Invalid=903, Unknown=16, NotChecked=0, Total=1056 [2021-11-23 02:08:15,374 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:15,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 103 Unchecked, 0.1s Time] [2021-11-23 02:08:15,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-23 02:08:15,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2021-11-23 02:08:15,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:08:15,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-11-23 02:08:15,391 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 17 [2021-11-23 02:08:15,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:15,391 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-11-23 02:08:15,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 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 02:08:15,392 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-11-23 02:08:15,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 02:08:15,394 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:15,394 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:15,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:08:15,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:08:15,622 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:08:15,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:15,622 INFO L85 PathProgramCache]: Analyzing trace with hash 547907585, now seen corresponding path program 3 times [2021-11-23 02:08:15,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:15,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641549069] [2021-11-23 02:08:15,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:15,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:15,654 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:08:15,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1686529195] [2021-11-23 02:08:15,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:08:15,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:08:15,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:08:15,663 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:08:15,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:08:15,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:08:15,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:08:15,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:08:15,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:08:15,832 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 02:08:15,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:08:15,888 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 02:08:15,889 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:15,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641549069] [2021-11-23 02:08:15,889 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:08:15,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686529195] [2021-11-23 02:08:15,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686529195] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:08:15,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [703523485] [2021-11-23 02:08:15,891 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:08:15,891 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:08:15,891 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:08:15,891 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:08:15,891 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:08:16,043 INFO L354 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2021-11-23 02:08:16,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2021-11-23 02:08:16,066 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 34 treesize of output 46 [2021-11-23 02:08:16,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-23 02:08:16,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:16,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:16,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:16,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:16,314 INFO L354 Elim1Store]: treesize reduction 156, result has 14.8 percent of original size [2021-11-23 02:08:16,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 456 treesize of output 477 [2021-11-23 02:08:16,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:16,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:16,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 34 [2021-11-23 02:08:16,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:16,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 38 [2021-11-23 02:08:16,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:16,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-11-23 02:08:16,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:08:16,596 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:08:16,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:16,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:16,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:16,689 INFO L354 Elim1Store]: treesize reduction 143, result has 14.9 percent of original size [2021-11-23 02:08:16,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 117 treesize of output 141 [2021-11-23 02:08:16,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:16,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:16,736 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:08:16,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 54 [2021-11-23 02:08:16,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:16,780 INFO L354 Elim1Store]: treesize reduction 29, result has 25.6 percent of original size [2021-11-23 02:08:16,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 67 [2021-11-23 02:08:16,818 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:08:16,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:16,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:16,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:16,834 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:08:16,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-23 02:08:16,858 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:08:16,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:16,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:16,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:16,938 INFO L354 Elim1Store]: treesize reduction 143, result has 14.9 percent of original size [2021-11-23 02:08:16,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 138 [2021-11-23 02:08:16,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:16,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:16,976 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:08:16,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 39 [2021-11-23 02:08:16,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:17,013 INFO L354 Elim1Store]: treesize reduction 29, result has 25.6 percent of original size [2021-11-23 02:08:17,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 61 [2021-11-23 02:08:17,052 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:08:17,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:17,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:17,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:17,066 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:08:17,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-23 02:08:17,162 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:08:17,563 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '832#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-23 02:08:17,563 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:08:17,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:08:17,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-23 02:08:17,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926808305] [2021-11-23 02:08:17,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:08:17,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 02:08:17,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:17,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 02:08:17,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:08:17,564 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:08:17,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:17,826 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2021-11-23 02:08:17,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 02:08:17,827 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 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 02:08:17,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:17,829 INFO L225 Difference]: With dead ends: 61 [2021-11-23 02:08:17,829 INFO L226 Difference]: Without dead ends: 48 [2021-11-23 02:08:17,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-11-23 02:08:17,831 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 59 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:17,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 24 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:08:17,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-23 02:08:17,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2021-11-23 02:08:17,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:08:17,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2021-11-23 02:08:17,840 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 18 [2021-11-23 02:08:17,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:17,841 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2021-11-23 02:08:17,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:08:17,841 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2021-11-23 02:08:17,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 02:08:17,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:17,842 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:17,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-23 02:08:18,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:08:18,058 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:08:18,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:18,058 INFO L85 PathProgramCache]: Analyzing trace with hash 2112660009, now seen corresponding path program 4 times [2021-11-23 02:08:18,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:18,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868439201] [2021-11-23 02:08:18,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:18,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:18,105 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:08:18,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757698327] [2021-11-23 02:08:18,107 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:08:18,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:08:18,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:08:18,118 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:08:18,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:08:18,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:18,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:08:18,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:08:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:08:18,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:08:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:08:18,285 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:18,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868439201] [2021-11-23 02:08:18,286 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:08:18,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757698327] [2021-11-23 02:08:18,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757698327] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:08:18,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [81570054] [2021-11-23 02:08:18,288 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:08:18,288 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:08:18,288 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:08:18,289 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:08:18,289 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:08:18,500 INFO L354 Elim1Store]: treesize reduction 185, result has 24.5 percent of original size [2021-11-23 02:08:18,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 76 [2021-11-23 02:08:18,791 INFO L354 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2021-11-23 02:08:18,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 60 treesize of output 105 [2021-11-23 02:08:18,815 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:08:18,822 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:08:18,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:18,867 INFO L354 Elim1Store]: treesize reduction 80, result has 13.0 percent of original size [2021-11-23 02:08:18,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 80 [2021-11-23 02:08:18,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:18,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 27 [2021-11-23 02:08:18,909 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:08:18,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 43 [2021-11-23 02:08:18,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:18,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-11-23 02:08:18,966 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:08:18,989 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:08:19,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:19,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:19,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:19,053 INFO L354 Elim1Store]: treesize reduction 143, result has 14.9 percent of original size [2021-11-23 02:08:19,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 107 [2021-11-23 02:08:19,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:19,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:19,100 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:08:19,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 54 [2021-11-23 02:08:19,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:19,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:19,116 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:08:19,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 97 treesize of output 57 [2021-11-23 02:08:19,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:19,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:19,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:19,150 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:08:19,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-23 02:08:19,160 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:08:19,181 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:08:19,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:19,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:19,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:19,268 INFO L354 Elim1Store]: treesize reduction 143, result has 14.9 percent of original size [2021-11-23 02:08:19,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 107 [2021-11-23 02:08:19,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:19,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:19,301 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:08:19,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 54 [2021-11-23 02:08:19,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:19,331 INFO L354 Elim1Store]: treesize reduction 29, result has 25.6 percent of original size [2021-11-23 02:08:19,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 67 [2021-11-23 02:08:19,369 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:08:19,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:19,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:19,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:19,380 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:08:19,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-23 02:08:19,467 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:08:19,919 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1117#(and (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= |ULTIMATE.start_main_~c~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (= (ite (= (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_#t~mem17#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) (+ |ULTIMATE.start_main_~c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1.offset|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-23 02:08:19,919 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:08:19,920 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:08:19,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-11-23 02:08:19,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625564786] [2021-11-23 02:08:19,920 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:08:19,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 02:08:19,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:19,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 02:08:19,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-11-23 02:08:19,921 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:08:20,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:20,132 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2021-11-23 02:08:20,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:08:20,133 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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 19 [2021-11-23 02:08:20,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:20,134 INFO L225 Difference]: With dead ends: 54 [2021-11-23 02:08:20,134 INFO L226 Difference]: Without dead ends: 32 [2021-11-23 02:08:20,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-11-23 02:08:20,135 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:20,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 21 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:08:20,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-23 02:08:20,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 21. [2021-11-23 02:08:20,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 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 02:08:20,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-11-23 02:08:20,141 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 19 [2021-11-23 02:08:20,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:20,141 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-11-23 02:08:20,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:08:20,142 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-11-23 02:08:20,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 02:08:20,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:20,142 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:20,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:08:20,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:08:20,343 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:08:20,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:20,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1569018936, now seen corresponding path program 5 times [2021-11-23 02:08:20,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:20,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250828781] [2021-11-23 02:08:20,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:20,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:20,378 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:08:20,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2145611396] [2021-11-23 02:08:20,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:08:20,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:08:20,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:08:20,387 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:08:20,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a78ed67-3f13-40ad-855e-37a56a596d36/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:08:20,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 02:08:20,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:08:20,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 02:08:20,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:08:20,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-11-23 02:08:20,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:08:20,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:20,665 INFO L354 Elim1Store]: treesize reduction 33, result has 34.0 percent of original size [2021-11-23 02:08:20,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2021-11-23 02:08:20,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:21,204 INFO L354 Elim1Store]: treesize reduction 384, result has 22.7 percent of original size [2021-11-23 02:08:21,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 104 treesize of output 191 [2021-11-23 02:08:22,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:22,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:22,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:22,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:22,446 INFO L354 Elim1Store]: treesize reduction 82, result has 25.5 percent of original size [2021-11-23 02:08:22,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 93 [2021-11-23 02:08:22,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:22,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:22,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:22,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:22,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:22,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 59 [2021-11-23 02:08:22,569 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:08:22,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:22,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:22,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:22,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:22,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:22,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:22,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:22,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:22,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:22,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 69 [2021-11-23 02:08:23,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:23,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:23,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:23,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:23,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:23,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 55 [2021-11-23 02:08:23,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:23,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:23,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:23,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 52 [2021-11-23 02:08:23,889 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:08:25,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:25,835 INFO L354 Elim1Store]: treesize reduction 142, result has 0.7 percent of original size [2021-11-23 02:08:25,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 132 treesize of output 72 [2021-11-23 02:08:25,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:25,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:25,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:25,894 INFO L354 Elim1Store]: treesize reduction 104, result has 1.0 percent of original size [2021-11-23 02:08:25,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 125 treesize of output 65 [2021-11-23 02:08:26,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:26,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:26,053 INFO L354 Elim1Store]: treesize reduction 34, result has 38.2 percent of original size [2021-11-23 02:08:26,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 144 treesize of output 102 [2021-11-23 02:08:26,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-23 02:08:26,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:26,396 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:08:26,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2021-11-23 02:08:26,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:26,645 INFO L354 Elim1Store]: treesize reduction 376, result has 18.1 percent of original size [2021-11-23 02:08:26,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 108 treesize of output 152 [2021-11-23 02:08:26,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:26,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:26,913 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-23 02:08:26,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 44 [2021-11-23 02:08:27,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:27,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:27,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:27,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:27,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:27,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:27,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:27,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:27,113 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 02:08:27,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 120 treesize of output 57 [2021-11-23 02:08:29,740 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:08:29,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:09:22,278 INFO L354 Elim1Store]: treesize reduction 150, result has 42.3 percent of original size [2021-11-23 02:09:22,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 1896 treesize of output 1965 [2021-11-23 02:09:33,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:09:34,381 INFO L354 Elim1Store]: treesize reduction 29, result has 31.0 percent of original size [2021-11-23 02:09:34,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 126 treesize of output 87 [2021-11-23 02:09:37,053 INFO L244 Elim1Store]: Index analysis took 114 ms [2021-11-23 02:09:39,101 INFO L354 Elim1Store]: treesize reduction 23, result has 54.9 percent of original size [2021-11-23 02:09:39,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 93 [2021-11-23 02:09:45,357 INFO L354 Elim1Store]: treesize reduction 231, result has 53.7 percent of original size [2021-11-23 02:09:45,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 19535869 treesize of output 7308028 [2021-11-23 02:09:51,325 WARN L227 SmtUtils]: Spent 5.96s on a formula simplification that was a NOOP. DAG size: 2092 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:09:53,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:09:53,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 7308028 treesize of output 7140112 [2021-11-23 02:09:59,079 WARN L227 SmtUtils]: Spent 5.86s on a formula simplification that was a NOOP. DAG size: 2101 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:10:04,871 WARN L227 SmtUtils]: Spent 5.79s on a formula simplification that was a NOOP. DAG size: 2098 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:10:06,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:10:06,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 7140181 treesize of output 7050089 [2021-11-23 02:10:12,635 WARN L227 SmtUtils]: Spent 5.88s on a formula simplification that was a NOOP. DAG size: 2106 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:10:18,522 WARN L227 SmtUtils]: Spent 5.88s on a formula simplification that was a NOOP. DAG size: 2103 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:10:20,243 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:10:20,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 7050152 treesize of output 7048892 [2021-11-23 02:10:26,086 WARN L227 SmtUtils]: Spent 5.84s on a formula simplification that was a NOOP. DAG size: 2111 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:10:31,928 WARN L227 SmtUtils]: Spent 5.84s on a formula simplification that was a NOOP. DAG size: 2108 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:10:34,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:10:34,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 7048917 treesize of output 7048297 [2021-11-23 02:10:40,106 WARN L227 SmtUtils]: Spent 5.90s on a formula simplification that was a NOOP. DAG size: 2116 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:10:45,963 WARN L227 SmtUtils]: Spent 5.85s on a formula simplification that was a NOOP. DAG size: 2113 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:11:21,973 WARN L227 SmtUtils]: Spent 28.97s on a formula simplification. DAG size of input: 2080 DAG size of output: 2080 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 02:11:49,347 WARN L227 SmtUtils]: Spent 5.86s on a formula simplification that was a NOOP. DAG size: 2075 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)