./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/mapavg5.i --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_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/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_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-crafted/mapavg5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/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_41f03460-17c4-41d0-b159-9bdb6ea2aea7/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 407fcf7d2eac351408fa4d5f2ec0e8445116bd56ec588be775b50f5c012c0e01 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:51:12,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:51:12,580 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:51:12,652 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:51:12,653 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:51:12,658 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:51:12,660 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:51:12,665 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:51:12,669 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:51:12,676 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:51:12,677 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:51:12,680 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:51:12,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:51:12,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:51:12,687 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:51:12,692 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:51:12,694 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:51:12,696 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:51:12,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:51:12,709 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:51:12,712 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:51:12,714 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:51:12,718 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:51:12,720 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:51:12,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:51:12,732 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:51:12,732 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:51:12,735 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:51:12,736 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:51:12,738 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:51:12,739 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:51:12,740 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:51:12,743 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:51:12,745 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:51:12,747 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:51:12,747 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:51:12,748 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:51:12,749 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:51:12,749 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:51:12,750 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:51:12,751 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:51:12,753 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:51:12,809 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:51:12,809 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:51:12,810 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:51:12,811 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:51:12,812 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:51:12,812 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:51:12,813 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:51:12,813 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:51:12,813 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:51:12,814 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:51:12,815 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:51:12,816 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:51:12,816 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:51:12,816 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:51:12,817 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:51:12,817 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:51:12,817 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:51:12,817 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:51:12,819 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:51:12,819 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:51:12,819 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:51:12,819 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:51:12,820 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:51:12,820 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:51:12,820 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:51:12,821 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:51:12,823 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:51:12,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:51:12,823 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:51:12,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:51:12,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:51:12,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:51:12,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:51:12,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:51:12,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:51:12,826 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:51:12,826 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:51:12,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:51:12,827 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:51:12,827 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:51:12,827 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:51:12,828 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_41f03460-17c4-41d0-b159-9bdb6ea2aea7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 407fcf7d2eac351408fa4d5f2ec0e8445116bd56ec588be775b50f5c012c0e01 [2021-11-23 02:51:13,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:51:13,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:51:13,263 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:51:13,265 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:51:13,267 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:51:13,269 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-crafted/mapavg5.i [2021-11-23 02:51:13,351 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/data/ec8662e92/f6beb6aee0ed4a2d968557be2de09930/FLAG5e56f6879 [2021-11-23 02:51:13,883 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:51:13,885 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/sv-benchmarks/c/array-crafted/mapavg5.i [2021-11-23 02:51:13,897 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/data/ec8662e92/f6beb6aee0ed4a2d968557be2de09930/FLAG5e56f6879 [2021-11-23 02:51:14,241 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/data/ec8662e92/f6beb6aee0ed4a2d968557be2de09930 [2021-11-23 02:51:14,246 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:51:14,249 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:51:14,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:51:14,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:51:14,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:51:14,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:51:14" (1/1) ... [2021-11-23 02:51:14,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64d57be9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:14, skipping insertion in model container [2021-11-23 02:51:14,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:51:14" (1/1) ... [2021-11-23 02:51:14,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:51:14,303 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:51:14,592 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_41f03460-17c4-41d0-b159-9bdb6ea2aea7/sv-benchmarks/c/array-crafted/mapavg5.i[1383,1396] [2021-11-23 02:51:14,597 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:51:14,607 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:51:14,651 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_41f03460-17c4-41d0-b159-9bdb6ea2aea7/sv-benchmarks/c/array-crafted/mapavg5.i[1383,1396] [2021-11-23 02:51:14,657 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:51:14,676 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:51:14,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:14 WrapperNode [2021-11-23 02:51:14,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:51:14,678 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:51:14,679 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:51:14,679 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:51:14,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:14" (1/1) ... [2021-11-23 02:51:14,712 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:14" (1/1) ... [2021-11-23 02:51:14,748 INFO L137 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 70 [2021-11-23 02:51:14,748 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:51:14,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:51:14,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:51:14,751 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:51:14,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:14" (1/1) ... [2021-11-23 02:51:14,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:14" (1/1) ... [2021-11-23 02:51:14,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:14" (1/1) ... [2021-11-23 02:51:14,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:14" (1/1) ... [2021-11-23 02:51:14,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:14" (1/1) ... [2021-11-23 02:51:14,796 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:14" (1/1) ... [2021-11-23 02:51:14,805 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:14" (1/1) ... [2021-11-23 02:51:14,813 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:51:14,816 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:51:14,816 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:51:14,816 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:51:14,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:14" (1/1) ... [2021-11-23 02:51:14,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:51:14,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:51:14,858 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:51:14,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:51:14,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:51:14,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:51:14,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:51:14,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:51:14,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:51:14,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:51:14,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:51:14,926 INFO L130 BoogieDeclarations]: Found specification of procedure mapavg [2021-11-23 02:51:14,927 INFO L138 BoogieDeclarations]: Found implementation of procedure mapavg [2021-11-23 02:51:14,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:51:15,050 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:51:15,053 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:51:15,233 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:51:15,278 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:51:15,279 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 02:51:15,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:51:15 BoogieIcfgContainer [2021-11-23 02:51:15,298 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:51:15,300 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:51:15,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:51:15,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:51:15,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:51:14" (1/3) ... [2021-11-23 02:51:15,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fbd7ad1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:51:15, skipping insertion in model container [2021-11-23 02:51:15,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:14" (2/3) ... [2021-11-23 02:51:15,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fbd7ad1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:51:15, skipping insertion in model container [2021-11-23 02:51:15,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:51:15" (3/3) ... [2021-11-23 02:51:15,309 INFO L111 eAbstractionObserver]: Analyzing ICFG mapavg5.i [2021-11-23 02:51:15,316 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:51:15,328 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:51:15,413 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:51:15,428 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 02:51:15,428 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:51:15,464 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:51:15,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 02:51:15,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:15,477 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:51:15,478 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:15,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:15,486 INFO L85 PathProgramCache]: Analyzing trace with hash -605605805, now seen corresponding path program 1 times [2021-11-23 02:51:15,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:15,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028200814] [2021-11-23 02:51:15,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:15,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:15,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:15,705 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:15,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028200814] [2021-11-23 02:51:15,707 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-23 02:51:15,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830350421] [2021-11-23 02:51:15,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:15,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:15,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:51:15,713 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:51:15,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:51:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:15,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:51:15,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:16,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:51:16,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:51:16,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830350421] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:16,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:16,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:51:16,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098070220] [2021-11-23 02:51:16,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:16,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:51:16,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:16,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:51:16,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:51:16,089 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:51:16,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:16,182 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2021-11-23 02:51:16,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:51:16,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2021-11-23 02:51:16,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:16,194 INFO L225 Difference]: With dead ends: 36 [2021-11-23 02:51:16,195 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 02:51:16,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 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 02:51:16,203 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:16,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:51:16,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 02:51:16,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-23 02:51:16,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:51:16,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-11-23 02:51:16,251 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2021-11-23 02:51:16,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:16,252 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-11-23 02:51:16,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-23 02:51:16,252 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-11-23 02:51:16,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 02:51:16,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:16,255 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:51:16,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:51:16,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-23 02:51:16,481 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:16,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:16,482 INFO L85 PathProgramCache]: Analyzing trace with hash 300632270, now seen corresponding path program 1 times [2021-11-23 02:51:16,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:16,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034746994] [2021-11-23 02:51:16,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:16,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:16,509 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:51:16,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1297862714] [2021-11-23 02:51:16,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:16,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:16,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:51:16,531 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:51:16,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:51:16,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:16,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:51:16,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:16,721 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:51:16,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:51:16,840 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:51:16,840 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:16,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034746994] [2021-11-23 02:51:16,841 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:51:16,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297862714] [2021-11-23 02:51:16,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297862714] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:51:16,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [550583195] [2021-11-23 02:51:16,875 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 02:51:16,876 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:51:16,885 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:51:16,893 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:51:16,894 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:51:17,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:17,081 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-23 02:51:17,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 28 [2021-11-23 02:51:17,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:17,135 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:51:17,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 02:51:17,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:17,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:51:17,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:17,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:17,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:17,518 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:51:17,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 214 treesize of output 202 [2021-11-23 02:51:17,682 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 25 treesize of output 21 [2021-11-23 02:51:17,942 INFO L197 IcfgInterpreter]: Interpreting procedure mapavg with input of size 27 for LOIs [2021-11-23 02:51:17,964 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:51:18,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [550583195] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:18,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:51:18,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 4] total 11 [2021-11-23 02:51:18,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258804947] [2021-11-23 02:51:18,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:18,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:51:18,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:18,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:51:18,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:51:18,336 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:51:18,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:18,582 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2021-11-23 02:51:18,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:51:18,582 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-11-23 02:51:18,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:18,584 INFO L225 Difference]: With dead ends: 30 [2021-11-23 02:51:18,584 INFO L226 Difference]: Without dead ends: 18 [2021-11-23 02:51:18,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:51:18,586 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 11 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:18,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 12 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:51:18,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-23 02:51:18,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-23 02:51:18,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:51:18,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-23 02:51:18,596 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 22 [2021-11-23 02:51:18,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:18,596 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-23 02:51:18,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:51:18,597 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-11-23 02:51:18,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 02:51:18,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:18,599 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:51:18,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:51:18,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:18,814 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:18,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:18,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1468513756, now seen corresponding path program 1 times [2021-11-23 02:51:18,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:18,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494554593] [2021-11-23 02:51:18,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:18,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:18,844 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:51:18,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [225095694] [2021-11-23 02:51:18,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:18,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:18,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:51:18,848 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:51:18,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:51:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:18,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:51:18,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:51:19,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:51:19,154 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:51:19,155 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:19,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494554593] [2021-11-23 02:51:19,155 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:51:19,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225095694] [2021-11-23 02:51:19,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225095694] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:51:19,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1629341277] [2021-11-23 02:51:19,173 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 02:51:19,173 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:51:19,174 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:51:19,174 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:51:19,174 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:51:19,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:19,272 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:51:19,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 02:51:19,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:19,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 24 [2021-11-23 02:51:19,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:19,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:51:19,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:19,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:19,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:19,472 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:51:19,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 214 treesize of output 202 [2021-11-23 02:51:19,555 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 25 treesize of output 21 [2021-11-23 02:51:19,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:19,701 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 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 02:51:20,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:51:20,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 24 treesize of output 16 [2021-11-23 02:51:20,326 INFO L197 IcfgInterpreter]: Interpreting procedure mapavg with input of size 17 for LOIs [2021-11-23 02:51:20,395 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:51:34,311 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '522#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4) |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (exists ((v_mapavg_~ret~0_BEFORE_RETURN_7 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (< v_mapavg_~ret~0_BEFORE_RETURN_7 0) (not (= (mod v_mapavg_~ret~0_BEFORE_RETURN_7 ~N~0) 0))) (ite (< ~N~0 0) (+ (- 1) (div v_mapavg_~ret~0_BEFORE_RETURN_7 ~N~0)) (+ (div v_mapavg_~ret~0_BEFORE_RETURN_7 ~N~0) 1)) (div v_mapavg_~ret~0_BEFORE_RETURN_7 ~N~0)) 4294967296) 2147483647) (mod (ite (and (< v_mapavg_~ret~0_BEFORE_RETURN_7 0) (not (= (mod v_mapavg_~ret~0_BEFORE_RETURN_7 ~N~0) 0))) (ite (< ~N~0 0) (+ (- 1) (div v_mapavg_~ret~0_BEFORE_RETURN_7 ~N~0)) (+ (div v_mapavg_~ret~0_BEFORE_RETURN_7 ~N~0) 1)) (div v_mapavg_~ret~0_BEFORE_RETURN_7 ~N~0)) 4294967296) (+ (mod (ite (and (< v_mapavg_~ret~0_BEFORE_RETURN_7 0) (not (= (mod v_mapavg_~ret~0_BEFORE_RETURN_7 ~N~0) 0))) (ite (< ~N~0 0) (+ (- 1) (div v_mapavg_~ret~0_BEFORE_RETURN_7 ~N~0)) (+ (div v_mapavg_~ret~0_BEFORE_RETURN_7 ~N~0) 1)) (div v_mapavg_~ret~0_BEFORE_RETURN_7 ~N~0)) 4294967296) (- 4294967296))))) (<= 1 ~N~0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~i~2#1| 0) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= ~N~0 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:51:34,311 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:51:34,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:51:34,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-23 02:51:34,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183712121] [2021-11-23 02:51:34,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:51:34,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:51:34,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:34,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:51:34,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=305, Unknown=1, NotChecked=0, Total=380 [2021-11-23 02:51:34,315 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 02:51:34,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:34,441 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2021-11-23 02:51:34,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:51:34,444 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 25 [2021-11-23 02:51:34,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:34,445 INFO L225 Difference]: With dead ends: 33 [2021-11-23 02:51:34,445 INFO L226 Difference]: Without dead ends: 19 [2021-11-23 02:51:34,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=74, Invalid=305, Unknown=1, NotChecked=0, Total=380 [2021-11-23 02:51:34,447 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:34,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:51:34,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-23 02:51:34,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-23 02:51:34,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:51:34,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-23 02:51:34,456 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 25 [2021-11-23 02:51:34,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:34,456 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-23 02:51:34,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 02:51:34,457 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-23 02:51:34,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 02:51:34,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:34,458 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:51:34,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:51:34,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:34,665 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:34,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:34,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1787452129, now seen corresponding path program 2 times [2021-11-23 02:51:34,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:34,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388692259] [2021-11-23 02:51:34,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:34,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:34,700 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:51:34,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [725183972] [2021-11-23 02:51:34,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:51:34,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:34,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:51:34,709 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:51:34,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:51:34,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 02:51:34,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:51:34,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:51:34,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:34,838 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:51:34,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:51:34,839 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:34,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388692259] [2021-11-23 02:51:34,839 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:51:34,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725183972] [2021-11-23 02:51:34,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725183972] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:51:34,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:51:34,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:51:34,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405602023] [2021-11-23 02:51:34,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:51:34,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:51:34,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:34,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:51:34,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:51:34,842 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:51:34,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:34,886 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2021-11-23 02:51:34,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:51:34,887 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-11-23 02:51:34,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:34,889 INFO L225 Difference]: With dead ends: 29 [2021-11-23 02:51:34,889 INFO L226 Difference]: Without dead ends: 20 [2021-11-23 02:51:34,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 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 02:51:34,894 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:34,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 18 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:51:34,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-23 02:51:34,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-23 02:51:34,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:51:34,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-11-23 02:51:34,910 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 26 [2021-11-23 02:51:34,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:34,912 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-11-23 02:51:34,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:51:34,913 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-11-23 02:51:34,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 02:51:34,915 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:34,915 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:51:34,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:51:35,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:35,125 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:35,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:35,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1336085508, now seen corresponding path program 1 times [2021-11-23 02:51:35,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:35,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820164898] [2021-11-23 02:51:35,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:35,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:35,148 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:51:35,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1505836304] [2021-11-23 02:51:35,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:35,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:35,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:51:35,155 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:51:35,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:51:35,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:51:35,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:51:35,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:35,323 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:51:35,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:51:35,459 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:51:35,459 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:51:35,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820164898] [2021-11-23 02:51:35,460 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:51:35,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505836304] [2021-11-23 02:51:35,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505836304] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:51:35,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1617001970] [2021-11-23 02:51:35,463 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 02:51:35,464 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:51:35,464 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:51:35,465 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:51:35,465 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:51:35,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:35,513 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-23 02:51:35,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 28 [2021-11-23 02:51:35,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:35,548 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:51:35,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 02:51:35,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:35,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 02:51:35,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:35,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:35,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:35,684 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 02:51:35,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 214 treesize of output 202 [2021-11-23 02:51:35,752 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 25 treesize of output 21 [2021-11-23 02:51:35,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:35,972 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 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 02:51:36,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:36,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:36,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:51:36,117 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 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-23 02:51:36,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:36,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:36,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:36,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:36,191 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-23 02:51:36,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-23 02:51:36,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:36,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-23 02:51:36,253 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 16 treesize of output 12 [2021-11-23 02:51:36,506 INFO L197 IcfgInterpreter]: Interpreting procedure mapavg with input of size 17 for LOIs [2021-11-23 02:51:36,552 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:51:52,433 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '933#(and (exists ((v_mapavg_~ret~0_BEFORE_RETURN_14 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (not (= (mod v_mapavg_~ret~0_BEFORE_RETURN_14 ~N~0) 0)) (< v_mapavg_~ret~0_BEFORE_RETURN_14 0)) (ite (< ~N~0 0) (+ (div v_mapavg_~ret~0_BEFORE_RETURN_14 ~N~0) (- 1)) (+ (div v_mapavg_~ret~0_BEFORE_RETURN_14 ~N~0) 1)) (div v_mapavg_~ret~0_BEFORE_RETURN_14 ~N~0)) 4294967296) 2147483647) (mod (ite (and (not (= (mod v_mapavg_~ret~0_BEFORE_RETURN_14 ~N~0) 0)) (< v_mapavg_~ret~0_BEFORE_RETURN_14 0)) (ite (< ~N~0 0) (+ (div v_mapavg_~ret~0_BEFORE_RETURN_14 ~N~0) (- 1)) (+ (div v_mapavg_~ret~0_BEFORE_RETURN_14 ~N~0) 1)) (div v_mapavg_~ret~0_BEFORE_RETURN_14 ~N~0)) 4294967296) (+ (mod (ite (and (not (= (mod v_mapavg_~ret~0_BEFORE_RETURN_14 ~N~0) 0)) (< v_mapavg_~ret~0_BEFORE_RETURN_14 0)) (ite (< ~N~0 0) (+ (div v_mapavg_~ret~0_BEFORE_RETURN_14 ~N~0) (- 1)) (+ (div v_mapavg_~ret~0_BEFORE_RETURN_14 ~N~0) 1)) (div v_mapavg_~ret~0_BEFORE_RETURN_14 ~N~0)) 4294967296) (- 4294967296))))) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4) |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 1 ~N~0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= ~N~0 (+ |ULTIMATE.start_main_~i~2#1| 1)) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:51:52,433 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:51:52,433 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:51:52,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-11-23 02:51:52,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840] [2021-11-23 02:51:52,434 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:51:52,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:51:52,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:51:52,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:51:52,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=376, Unknown=2, NotChecked=0, Total=462 [2021-11-23 02:51:52,438 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:51:52,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:51:52,485 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2021-11-23 02:51:52,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:51:52,485 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 27 [2021-11-23 02:51:52,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:51:52,486 INFO L225 Difference]: With dead ends: 35 [2021-11-23 02:51:52,487 INFO L226 Difference]: Without dead ends: 21 [2021-11-23 02:51:52,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=84, Invalid=376, Unknown=2, NotChecked=0, Total=462 [2021-11-23 02:51:52,490 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:51:52,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 19 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:51:52,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-23 02:51:52,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-23 02:51:52,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:51:52,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-11-23 02:51:52,498 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 27 [2021-11-23 02:51:52,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:51:52,499 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-11-23 02:51:52,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:51:52,499 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-11-23 02:51:52,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 02:51:52,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:51:52,501 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:51:52,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-23 02:51:52,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:52,713 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:51:52,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:51:52,713 INFO L85 PathProgramCache]: Analyzing trace with hash 42151806, now seen corresponding path program 2 times [2021-11-23 02:51:52,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:51:52,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404585869] [2021-11-23 02:51:52,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:51:52,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:51:52,731 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:51:52,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [839868918] [2021-11-23 02:51:52,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:51:52,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:52,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:51:52,733 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:51:52,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f03460-17c4-41d0-b159-9bdb6ea2aea7/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:51:53,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-23 02:51:53,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:51:53,840 WARN L261 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 103 conjunts are in the unsatisfiable core [2021-11-23 02:51:53,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:53,895 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 20 treesize of output 16 [2021-11-23 02:51:53,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:53,946 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 38 treesize of output 33 [2021-11-23 02:51:57,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:57,375 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:51:57,376 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 314 treesize of output 164 [2021-11-23 02:52:08,967 WARN L227 SmtUtils]: Spent 6.50s on a formula simplification. DAG size of input: 81 DAG size of output: 69 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:52:14,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:52:14,576 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:52:14,576 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 519 treesize of output 274 [2021-11-23 02:52:18,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:52:18,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:52:18,274 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:52:18,275 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 428 treesize of output 286 [2021-11-23 02:52:24,039 INFO L354 Elim1Store]: treesize reduction 53, result has 27.4 percent of original size [2021-11-23 02:52:24,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 808 treesize of output 427 [2021-11-23 02:53:21,302 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 02:53:21,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:53:48,964 WARN L227 SmtUtils]: Spent 7.73s on a formula simplification. DAG size of input: 106 DAG size of output: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:57:08,788 WARN L227 SmtUtils]: Spent 11.34s on a formula simplification. DAG size of input: 97 DAG size of output: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:58:21,045 WARN L227 SmtUtils]: Spent 11.91s on a formula simplification. DAG size of input: 97 DAG size of output: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:58:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:58:58,450 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:58:58,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404585869] [2021-11-23 02:58:58,451 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:58:58,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839868918] [2021-11-23 02:58:58,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839868918] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:58:58,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1864323444] [2021-11-23 02:58:58,454 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 02:58:58,454 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:58:58,455 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:58:58,455 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:58:58,455 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:58:58,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:58,484 INFO L354 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2021-11-23 02:58:58,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 28 [2021-11-23 02:58:58,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:58,506 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:58:58,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-23 02:58:58,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:58,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 02:58:58,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:58,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:58:58,597 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 02:58:58,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 204 treesize of output 203 [2021-11-23 02:58:58,655 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 25 treesize of output 21 [2021-11-23 02:58:58,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:58,719 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 0 case distinctions, treesize of input 30 treesize of output 20 [2021-11-23 02:58:58,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:58,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:58,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:58:58,848 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 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-23 02:58:58,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:58,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:58,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:58,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:58,900 INFO L354 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2021-11-23 02:58:58,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2021-11-23 02:58:58,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:58,926 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 24 treesize of output 24 [2021-11-23 02:58:58,939 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 16 treesize of output 12 [2021-11-23 02:58:59,126 INFO L197 IcfgInterpreter]: Interpreting procedure mapavg with input of size 17 for LOIs [2021-11-23 02:58:59,162 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:59:41,632 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1248#(and (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_mapavg_~ret~0_BEFORE_RETURN_20 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod (ite (and (not (= (mod v_mapavg_~ret~0_BEFORE_RETURN_20 ~N~0) 0)) (< v_mapavg_~ret~0_BEFORE_RETURN_20 0)) (ite (< ~N~0 0) (+ (- 1) (div v_mapavg_~ret~0_BEFORE_RETURN_20 ~N~0)) (+ (div v_mapavg_~ret~0_BEFORE_RETURN_20 ~N~0) 1)) (div v_mapavg_~ret~0_BEFORE_RETURN_20 ~N~0)) 4294967296) 2147483647) (mod (ite (and (not (= (mod v_mapavg_~ret~0_BEFORE_RETURN_20 ~N~0) 0)) (< v_mapavg_~ret~0_BEFORE_RETURN_20 0)) (ite (< ~N~0 0) (+ (- 1) (div v_mapavg_~ret~0_BEFORE_RETURN_20 ~N~0)) (+ (div v_mapavg_~ret~0_BEFORE_RETURN_20 ~N~0) 1)) (div v_mapavg_~ret~0_BEFORE_RETURN_20 ~N~0)) 4294967296) (+ (mod (ite (and (not (= (mod v_mapavg_~ret~0_BEFORE_RETURN_20 ~N~0) 0)) (< v_mapavg_~ret~0_BEFORE_RETURN_20 0)) (ite (< ~N~0 0) (+ (- 1) (div v_mapavg_~ret~0_BEFORE_RETURN_20 ~N~0)) (+ (div v_mapavg_~ret~0_BEFORE_RETURN_20 ~N~0) 1)) (div v_mapavg_~ret~0_BEFORE_RETURN_20 ~N~0)) 4294967296) (- 4294967296))))) (<= ~N~0 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4) |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 1 ~N~0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= ~N~0 (+ |ULTIMATE.start_main_~i~2#1| 1)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-23 02:59:41,633 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:59:41,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:59:41,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 40 [2021-11-23 02:59:41,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438526428] [2021-11-23 02:59:41,633 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:59:41,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-23 02:59:41,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:59:41,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-23 02:59:41,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=2656, Unknown=6, NotChecked=0, Total=2862 [2021-11-23 02:59:41,637 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 40 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 33 states have internal predecessors, (39), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 03:00:00,502 WARN L227 SmtUtils]: Spent 7.48s on a formula simplification. DAG size of input: 122 DAG size of output: 92 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:00:15,313 WARN L227 SmtUtils]: Spent 10.87s on a formula simplification. DAG size of input: 116 DAG size of output: 86 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:00:25,194 WARN L227 SmtUtils]: Spent 6.25s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:00:27,200 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse30 (select |c_#memory_int| |c_mapavg_#in~x.base|)) (.cse29 (+ |c_mapavg_#in~x.offset| 4))) (let ((.cse31 (select .cse30 .cse29)) (.cse32 (select .cse30 |c_mapavg_#in~x.offset|))) (let ((.cse34 (+ .cse31 .cse32 1))) (let ((.cse15 (div .cse34 c_~N~0)) (.cse8 (div c_mapavg_~ret~0 c_~N~0))) (let ((.cse12 (mod .cse8 4294967296)) (.cse7 (mod .cse15 4294967296)) (.cse4 (= (mod .cse34 c_~N~0) 0))) (let ((.cse9 (= (mod c_mapavg_~ret~0 c_~N~0) 0)) (.cse1 (not .cse4)) (.cse33 (= .cse12 .cse7)) (.cse6 (< .cse34 0))) (let ((.cse13 (or .cse33 .cse6)) (.cse5 (<= 0 .cse34)) (.cse14 (or .cse33 .cse1)) (.cse18 (mod (+ .cse8 1) 4294967296)) (.cse10 (<= 0 c_mapavg_~ret~0)) (.cse11 (and (not .cse9) (< c_mapavg_~ret~0 0)))) (and (or (<= 0 c_~N~0) (let ((.cse2 (mod (+ .cse15 4294967295) 4294967296))) (and (or (let ((.cse3 (mod (+ 4294967295 .cse8) 4294967296))) (let ((.cse0 (= .cse7 .cse3))) (and (or .cse0 .cse1) (or (= .cse2 .cse3) .cse4 .cse5) (or .cse0 .cse6)))) .cse9 .cse10) (or .cse11 (and (or .cse4 (= .cse12 .cse2) .cse5) .cse13 .cse14))))) (or (let ((.cse17 (mod (+ .cse15 1) 4294967296))) (and (or (let ((.cse16 (= .cse18 .cse7))) (and (or .cse16 .cse1) (or .cse16 .cse6) (or (= .cse17 .cse18) .cse4 .cse5))) .cse9 .cse10) (or .cse11 (and .cse13 (or .cse4 .cse5 (= .cse17 .cse12)) .cse14)))) (< c_~N~0 0)) (or (let ((.cse26 (let ((.cse28 (store (store .cse30 |c_mapavg_#in~x.offset| .cse31) (+ (* c_~N~0 4) |c_mapavg_#in~x.offset| (- 4)) .cse32))) (+ (select .cse28 .cse29) (select .cse28 |c_mapavg_#in~x.offset|) 1)))) (let ((.cse27 (div .cse26 c_~N~0)) (.cse21 (= (mod .cse26 c_~N~0) 0))) (let ((.cse19 (and (not .cse21) (< .cse26 0))) (.cse20 (mod .cse27 4294967296)) (.cse24 (< 1 c_~N~0)) (.cse25 (<= c_~N~0 2)) (.cse23 (mod (+ .cse27 1) 4294967296)) (.cse22 (<= 0 .cse26))) (and (or (and (or .cse19 (= .cse18 .cse20)) (or .cse21 .cse22 (= .cse23 .cse18)) .cse24 .cse25) .cse9 .cse10) (or .cse11 (and (or .cse19 (= .cse12 .cse20)) .cse24 .cse25 (or .cse21 (= .cse23 .cse12) .cse22))))))) (< c_mapavg_~i~0 c_~N~0)))))))))) is different from false [2021-11-23 03:04:47,484 WARN L227 SmtUtils]: Spent 3.89m on a formula simplification. DAG size of input: 179 DAG size of output: 136 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:04:51,785 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:04:55,817 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:05:05,706 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:05:26,717 WARN L227 SmtUtils]: Spent 11.78s on a formula simplification that was a NOOP. DAG size: 128 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)