./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifeqn4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7 --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 b0db5597ff96f0e5a728327333d32dd7df56f4b1fb643f99ebf0f69cacecd717 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:08:07,794 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:08:07,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:08:07,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:08:07,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:08:07,850 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:08:07,852 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:08:07,857 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:08:07,859 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:08:07,867 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:08:07,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:08:07,870 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:08:07,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:08:07,874 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:08:07,876 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:08:07,883 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:08:07,884 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:08:07,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:08:07,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:08:07,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:08:07,892 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:08:07,896 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:08:07,899 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:08:07,901 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:08:07,910 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:08:07,910 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:08:07,911 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:08:07,913 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:08:07,913 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:08:07,915 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:08:07,915 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:08:07,916 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:08:07,918 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:08:07,919 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:08:07,921 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:08:07,921 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:08:07,922 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:08:07,922 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:08:07,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:08:07,923 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:08:07,924 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:08:07,925 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:08:07,971 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:08:07,971 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:08:07,972 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:08:07,972 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:08:07,973 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:08:07,973 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:08:07,973 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:08:07,973 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:08:07,973 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:08:07,974 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:08:07,974 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:08:07,974 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:08:07,977 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:08:07,977 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:08:07,977 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:08:07,978 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:08:07,978 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:08:07,978 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:08:07,979 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:08:07,979 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:08:07,979 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:08:07,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:08:07,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:08:07,980 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:08:07,980 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:08:07,980 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:08:07,982 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:08:07,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:08:07,983 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:08:07,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:08:07,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:08:07,984 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:08:07,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:08:07,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:08:07,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:08:07,985 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:08:07,986 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:08:07,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:08:07,986 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:08:07,986 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:08:07,986 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:08:07,987 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_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b0db5597ff96f0e5a728327333d32dd7df56f4b1fb643f99ebf0f69cacecd717 [2021-11-25 18:08:08,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:08:08,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:08:08,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:08:08,289 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:08:08,293 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:08:08,295 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-fpi/ifeqn4.c [2021-11-25 18:08:08,397 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/data/ca24a548f/276beee3fe8248b6a110fe9d7d3bca93/FLAG83fea3024 [2021-11-25 18:08:08,997 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:08:08,998 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/sv-benchmarks/c/array-fpi/ifeqn4.c [2021-11-25 18:08:09,006 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/data/ca24a548f/276beee3fe8248b6a110fe9d7d3bca93/FLAG83fea3024 [2021-11-25 18:08:09,339 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/data/ca24a548f/276beee3fe8248b6a110fe9d7d3bca93 [2021-11-25 18:08:09,342 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:08:09,344 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:08:09,345 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:08:09,346 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:08:09,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:08:09,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:08:09" (1/1) ... [2021-11-25 18:08:09,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15fee84f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:09, skipping insertion in model container [2021-11-25 18:08:09,357 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:08:09" (1/1) ... [2021-11-25 18:08:09,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:08:09,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:08:09,574 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_39111f78-c7e6-4d05-b880-474e141c553a/sv-benchmarks/c/array-fpi/ifeqn4.c[589,602] [2021-11-25 18:08:09,614 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:08:09,623 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:08:09,636 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_39111f78-c7e6-4d05-b880-474e141c553a/sv-benchmarks/c/array-fpi/ifeqn4.c[589,602] [2021-11-25 18:08:09,647 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:08:09,664 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:08:09,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:09 WrapperNode [2021-11-25 18:08:09,665 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:08:09,666 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:08:09,666 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:08:09,666 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:08:09,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:09" (1/1) ... [2021-11-25 18:08:09,687 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:09" (1/1) ... [2021-11-25 18:08:09,725 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2021-11-25 18:08:09,725 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:08:09,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:08:09,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:08:09,726 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:08:09,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:09" (1/1) ... [2021-11-25 18:08:09,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:09" (1/1) ... [2021-11-25 18:08:09,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:09" (1/1) ... [2021-11-25 18:08:09,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:09" (1/1) ... [2021-11-25 18:08:09,746 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:09" (1/1) ... [2021-11-25 18:08:09,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:09" (1/1) ... [2021-11-25 18:08:09,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:09" (1/1) ... [2021-11-25 18:08:09,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:08:09,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:08:09,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:08:09,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:08:09,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:09" (1/1) ... [2021-11-25 18:08:09,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:08:09,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:08:09,798 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:08:09,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:08:09,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:08:09,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:08:09,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:08:09,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:08:09,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:08:09,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:08:09,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:08:09,917 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:08:09,919 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:08:10,095 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:08:10,143 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:08:10,143 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-25 18:08:10,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:08:10 BoogieIcfgContainer [2021-11-25 18:08:10,146 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:08:10,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:08:10,148 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:08:10,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:08:10,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:08:09" (1/3) ... [2021-11-25 18:08:10,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58584f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:08:10, skipping insertion in model container [2021-11-25 18:08:10,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:08:09" (2/3) ... [2021-11-25 18:08:10,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58584f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:08:10, skipping insertion in model container [2021-11-25 18:08:10,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:08:10" (3/3) ... [2021-11-25 18:08:10,155 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn4.c [2021-11-25 18:08:10,160 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:08:10,166 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:08:10,221 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:08:10,229 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 [2021-11-25 18:08:10,229 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:08:10,256 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:10,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 18:08:10,274 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:10,275 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:08:10,276 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:08:10,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:10,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1095923036, now seen corresponding path program 1 times [2021-11-25 18:08:10,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:10,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519201739] [2021-11-25 18:08:10,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:10,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:10,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:10,622 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:10,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519201739] [2021-11-25 18:08:10,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519201739] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:08:10,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:08:10,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:08:10,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423719708] [2021-11-25 18:08:10,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:08:10,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:08:10,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:10,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:08:10,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:08:10,678 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:10,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:10,774 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2021-11-25 18:08:10,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:08:10,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-25 18:08:10,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:10,787 INFO L225 Difference]: With dead ends: 20 [2021-11-25 18:08:10,788 INFO L226 Difference]: Without dead ends: 10 [2021-11-25 18:08:10,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:08:10,799 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:10,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:08:10,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-25 18:08:10,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-25 18:08:10,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:10,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-11-25 18:08:10,845 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2021-11-25 18:08:10,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:10,846 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-11-25 18:08:10,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:10,848 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-11-25 18:08:10,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 18:08:10,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:10,851 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:08:10,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:08:10,853 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:08:10,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:10,857 INFO L85 PathProgramCache]: Analyzing trace with hash 255696374, now seen corresponding path program 1 times [2021-11-25 18:08:10,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:10,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652569705] [2021-11-25 18:08:10,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:10,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:10,936 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:08:10,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1727411673] [2021-11-25 18:08:10,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:10,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:10,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:08:10,944 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:08:10,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:08:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:11,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:08:11,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:08:11,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:08:11,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:08:11,160 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:11,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652569705] [2021-11-25 18:08:11,161 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:08:11,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727411673] [2021-11-25 18:08:11,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727411673] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:08:11,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:08:11,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:08:11,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494058625] [2021-11-25 18:08:11,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:08:11,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:08:11,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:11,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:08:11,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:08:11,174 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:11,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:11,231 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-11-25 18:08:11,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:08:11,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-25 18:08:11,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:11,233 INFO L225 Difference]: With dead ends: 21 [2021-11-25 18:08:11,234 INFO L226 Difference]: Without dead ends: 16 [2021-11-25 18:08:11,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:08:11,237 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:11,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 6 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:08:11,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-25 18:08:11,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2021-11-25 18:08:11,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:11,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-11-25 18:08:11,253 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-11-25 18:08:11,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:11,254 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-11-25 18:08:11,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:11,254 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-11-25 18:08:11,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 18:08:11,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:11,255 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:08:11,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:08:11,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:11,479 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:08:11,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:11,480 INFO L85 PathProgramCache]: Analyzing trace with hash -652476163, now seen corresponding path program 1 times [2021-11-25 18:08:11,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:11,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787460140] [2021-11-25 18:08:11,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:11,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:11,547 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:08:11,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1004072633] [2021-11-25 18:08:11,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:11,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:11,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:08:11,551 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:08:11,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:08:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:11,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 18:08:11,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:08:11,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:11,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:08:11,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:08:12,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:08:12,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:08:12,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:08:12,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 8 [2021-11-25 18:08:12,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:08:12,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:08:12,220 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:12,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787460140] [2021-11-25 18:08:12,224 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:08:12,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004072633] [2021-11-25 18:08:12,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004072633] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:08:12,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1935226663] [2021-11-25 18:08:12,255 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 18:08:12,255 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:08:12,260 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:08:12,267 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:08:12,268 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:08:12,446 INFO L354 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2021-11-25 18:08:12,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 60 [2021-11-25 18:08:12,636 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-25 18:08:12,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-25 18:08:12,713 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:08:12,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:12,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:12,842 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-25 18:08:12,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 134 [2021-11-25 18:08:12,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:12,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 63 [2021-11-25 18:08:12,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:12,912 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:08:12,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 69 [2021-11-25 18:08:12,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:13,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:13,005 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 63 treesize of output 63 [2021-11-25 18:08:13,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:13,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:13,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:13,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:13,214 INFO L354 Elim1Store]: treesize reduction 323, result has 15.9 percent of original size [2021-11-25 18:08:13,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 200 [2021-11-25 18:08:13,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:13,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:13,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:13,287 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:08:13,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 201 treesize of output 120 [2021-11-25 18:08:13,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:13,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:13,321 INFO L354 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-11-25 18:08:13,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 99 [2021-11-25 18:08:13,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:13,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:13,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:13,451 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:08:13,451 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 90 treesize of output 93 [2021-11-25 18:08:13,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:13,501 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:08:13,895 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '183#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ (* 4 |ULTIMATE.start_main_~i~0#1|) (* 4 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8))) |ULTIMATE.start_main_#t~mem13#1|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 18:08:13,895 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:08:13,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:08:13,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-25 18:08:13,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137368463] [2021-11-25 18:08:13,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:08:13,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:08:13,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:13,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:08:13,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:08:13,898 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:14,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:14,032 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-11-25 18:08:14,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:08:14,033 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-25 18:08:14,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:14,034 INFO L225 Difference]: With dead ends: 28 [2021-11-25 18:08:14,034 INFO L226 Difference]: Without dead ends: 26 [2021-11-25 18:08:14,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-25 18:08:14,036 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:14,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 18 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:08:14,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-25 18:08:14,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 14. [2021-11-25 18:08:14,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:14,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-11-25 18:08:14,042 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 9 [2021-11-25 18:08:14,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:14,043 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-25 18:08:14,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:14,043 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-11-25 18:08:14,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 18:08:14,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:14,044 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:08:14,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:08:14,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:14,271 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:08:14,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:14,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1258946262, now seen corresponding path program 2 times [2021-11-25 18:08:14,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:14,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796880819] [2021-11-25 18:08:14,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:14,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:14,307 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:08:14,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122252203] [2021-11-25 18:08:14,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:08:14,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:14,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:08:14,309 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:08:14,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:08:14,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 18:08:14,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:08:14,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:08:14,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:08:14,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:14,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:08:14,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:14,480 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:14,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796880819] [2021-11-25 18:08:14,480 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:08:14,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122252203] [2021-11-25 18:08:14,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122252203] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:08:14,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [198360355] [2021-11-25 18:08:14,483 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 18:08:14,484 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:08:14,484 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:08:14,484 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:08:14,484 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:08:14,632 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-25 18:08:14,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-25 18:08:14,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2021-11-25 18:08:14,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:08:14,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:14,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:14,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:14,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:15,013 INFO L354 Elim1Store]: treesize reduction 318, result has 12.4 percent of original size [2021-11-25 18:08:15,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 408 treesize of output 447 [2021-11-25 18:08:15,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:15,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:15,179 INFO L354 Elim1Store]: treesize reduction 72, result has 4.0 percent of original size [2021-11-25 18:08:15,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 396 treesize of output 352 [2021-11-25 18:08:15,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:15,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 53 [2021-11-25 18:08:15,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:15,448 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 63 treesize of output 63 [2021-11-25 18:08:15,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:15,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:15,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:15,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:15,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:15,627 INFO L354 Elim1Store]: treesize reduction 323, result has 15.9 percent of original size [2021-11-25 18:08:15,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 162 treesize of output 222 [2021-11-25 18:08:15,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:15,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:15,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:15,663 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:08:15,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 201 treesize of output 120 [2021-11-25 18:08:15,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:15,703 INFO L354 Elim1Store]: treesize reduction 46, result has 38.7 percent of original size [2021-11-25 18:08:15,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 125 [2021-11-25 18:08:15,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:15,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:15,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:15,773 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:08:15,773 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 90 treesize of output 93 [2021-11-25 18:08:15,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:15,806 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:08:16,092 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '313#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ (* 4 |ULTIMATE.start_main_~i~0#1|) (* 4 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 18:08:16,092 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:08:16,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:08:16,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-25 18:08:16,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897655219] [2021-11-25 18:08:16,093 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:08:16,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:08:16,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:16,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:08:16,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:08:16,094 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:16,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:16,233 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-11-25 18:08:16,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:08:16,234 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 18:08:16,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:16,234 INFO L225 Difference]: With dead ends: 35 [2021-11-25 18:08:16,234 INFO L226 Difference]: Without dead ends: 23 [2021-11-25 18:08:16,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-11-25 18:08:16,236 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:16,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 18 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:08:16,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-25 18:08:16,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 13. [2021-11-25 18:08:16,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:16,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-25 18:08:16,240 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2021-11-25 18:08:16,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:16,240 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-25 18:08:16,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:16,240 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-25 18:08:16,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 18:08:16,241 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:16,241 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:08:16,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:08:16,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:16,442 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:08:16,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:16,442 INFO L85 PathProgramCache]: Analyzing trace with hash 2034389572, now seen corresponding path program 3 times [2021-11-25 18:08:16,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:16,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515254048] [2021-11-25 18:08:16,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:16,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:16,492 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:08:16,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1076463979] [2021-11-25 18:08:16,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:08:16,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:16,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:08:16,497 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:08:16,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:08:16,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:08:16,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:08:16,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 18:08:16,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:08:16,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:16,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:16,870 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 21 treesize of output 20 [2021-11-25 18:08:16,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:08:16,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:08:17,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:08:17,306 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:08:17,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:08:17,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:08:17,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 8 [2021-11-25 18:08:17,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-11-25 18:08:17,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2021-11-25 18:08:17,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-25 18:08:17,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:08:17,395 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:17,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515254048] [2021-11-25 18:08:17,395 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:08:17,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076463979] [2021-11-25 18:08:17,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076463979] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:08:17,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1665322962] [2021-11-25 18:08:17,401 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 18:08:17,401 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:08:17,402 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:08:17,402 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:08:17,402 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:08:17,524 INFO L354 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2021-11-25 18:08:17,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 60 [2021-11-25 18:08:17,646 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-25 18:08:17,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-25 18:08:17,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:17,690 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:08:17,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:17,797 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-25 18:08:17,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 134 [2021-11-25 18:08:17,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:08:17,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 67 [2021-11-25 18:08:17,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:17,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 38 [2021-11-25 18:08:17,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:17,929 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 63 treesize of output 63 [2021-11-25 18:08:17,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:17,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:18,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:18,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:18,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:18,092 INFO L354 Elim1Store]: treesize reduction 323, result has 15.9 percent of original size [2021-11-25 18:08:18,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 200 [2021-11-25 18:08:18,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:18,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:18,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:18,132 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:08:18,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 201 treesize of output 93 [2021-11-25 18:08:18,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:18,180 INFO L354 Elim1Store]: treesize reduction 46, result has 38.7 percent of original size [2021-11-25 18:08:18,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 152 [2021-11-25 18:08:18,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:18,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:18,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:18,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:18,266 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:08:18,266 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 90 treesize of output 93 [2021-11-25 18:08:18,302 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:08:18,703 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '464#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ (* 4 |ULTIMATE.start_main_~i~0#1|) (* 4 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8))) |ULTIMATE.start_main_#t~mem13#1|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 18:08:18,704 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:08:18,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:08:18,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-11-25 18:08:18,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555692108] [2021-11-25 18:08:18,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:08:18,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 18:08:18,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:18,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 18:08:18,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-11-25 18:08:18,706 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:18,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:18,896 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-11-25 18:08:18,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:08:18,897 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-25 18:08:18,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:18,898 INFO L225 Difference]: With dead ends: 34 [2021-11-25 18:08:18,898 INFO L226 Difference]: Without dead ends: 32 [2021-11-25 18:08:18,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-11-25 18:08:18,900 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 36 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:18,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 30 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 67 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time] [2021-11-25 18:08:18,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-25 18:08:18,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 16. [2021-11-25 18:08:18,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:18,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-11-25 18:08:18,913 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2021-11-25 18:08:18,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:18,913 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-11-25 18:08:18,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:18,914 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-11-25 18:08:18,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 18:08:18,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:18,914 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:08:18,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:08:19,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:19,139 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:08:19,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:19,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1347561873, now seen corresponding path program 4 times [2021-11-25 18:08:19,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:19,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470965851] [2021-11-25 18:08:19,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:19,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:19,207 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:08:19,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782361890] [2021-11-25 18:08:19,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:08:19,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:19,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:08:19,209 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:08:19,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:08:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:19,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:08:19,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:08:19,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:19,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:08:19,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:19,426 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:19,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470965851] [2021-11-25 18:08:19,426 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:08:19,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782361890] [2021-11-25 18:08:19,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782361890] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:08:19,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2083386271] [2021-11-25 18:08:19,431 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 18:08:19,432 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:08:19,432 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:08:19,432 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:08:19,432 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:08:19,597 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-25 18:08:19,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-25 18:08:19,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2021-11-25 18:08:19,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:08:19,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:19,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:19,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:19,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:19,853 INFO L354 Elim1Store]: treesize reduction 318, result has 12.4 percent of original size [2021-11-25 18:08:19,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 408 treesize of output 447 [2021-11-25 18:08:19,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:19,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 55 [2021-11-25 18:08:20,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:20,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 53 [2021-11-25 18:08:20,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:20,197 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 63 treesize of output 63 [2021-11-25 18:08:20,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:20,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:20,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:20,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:20,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:20,392 INFO L354 Elim1Store]: treesize reduction 323, result has 15.9 percent of original size [2021-11-25 18:08:20,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 162 treesize of output 222 [2021-11-25 18:08:20,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:20,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:20,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:20,427 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:08:20,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 234 treesize of output 126 [2021-11-25 18:08:20,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:20,489 INFO L354 Elim1Store]: treesize reduction 46, result has 38.7 percent of original size [2021-11-25 18:08:20,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 241 treesize of output 158 [2021-11-25 18:08:20,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:20,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:20,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:20,565 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:08:20,565 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 90 treesize of output 93 [2021-11-25 18:08:20,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:20,608 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:08:20,926 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '621#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ (* 4 |ULTIMATE.start_main_~i~0#1|) (* 4 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 18:08:20,926 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:08:20,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:08:20,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-11-25 18:08:20,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243501097] [2021-11-25 18:08:20,926 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:08:20,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 18:08:20,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:20,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 18:08:20,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-11-25 18:08:20,928 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:21,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:21,118 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-11-25 18:08:21,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:08:21,119 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-25 18:08:21,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:21,120 INFO L225 Difference]: With dead ends: 48 [2021-11-25 18:08:21,120 INFO L226 Difference]: Without dead ends: 40 [2021-11-25 18:08:21,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-11-25 18:08:21,123 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 50 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:21,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 29 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:08:21,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-25 18:08:21,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2021-11-25 18:08:21,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:21,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-25 18:08:21,134 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-11-25 18:08:21,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:21,135 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-25 18:08:21,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:21,135 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-25 18:08:21,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 18:08:21,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:21,136 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:08:21,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-25 18:08:21,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 18:08:21,351 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:08:21,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:21,351 INFO L85 PathProgramCache]: Analyzing trace with hash 824116829, now seen corresponding path program 5 times [2021-11-25 18:08:21,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:21,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376190472] [2021-11-25 18:08:21,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:21,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:21,403 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:08:21,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1719231251] [2021-11-25 18:08:21,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:08:21,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:21,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:08:21,413 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:08:21,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:08:21,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 18:08:21,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:08:21,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-25 18:08:21,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:08:22,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:22,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:22,085 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 21 treesize of output 20 [2021-11-25 18:08:22,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 76 [2021-11-25 18:08:22,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:22,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:22,182 INFO L354 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2021-11-25 18:08:22,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 68 [2021-11-25 18:08:22,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:22,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 15 [2021-11-25 18:08:22,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:22,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-11-25 18:08:22,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:08:22,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:22,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:08:23,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:08:25,308 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_252 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse0 (* 4294967296 |aux_div_ULTIMATE.start_main_~i~0#1_45|))) (or (< 2147483647 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (<= c_~N~0 (+ .cse0 |aux_mod_ULTIMATE.start_main_~i~0#1_45|)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_252) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (< (+ .cse0 |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) c_~N~0) (< |aux_mod_ULTIMATE.start_main_~i~0#1_45| 0)))) (or (<= c_~N~0 0) (< 1 c_~N~0)) (forall ((v_ArrVal_252 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse1 (* 4294967296 |aux_div_ULTIMATE.start_main_~i~0#1_45|))) (or (<= c_~N~0 (+ .cse1 |aux_mod_ULTIMATE.start_main_~i~0#1_45|)) (<= 4294967296 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (< (+ .cse1 |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) c_~N~0) (<= |aux_mod_ULTIMATE.start_main_~i~0#1_45| 2147483647) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~b~0#1.offset| (- 34359738368)) v_ArrVal_252) |c_ULTIMATE.start_main_~b~0#1.offset|) 1))))) is different from false [2021-11-25 18:08:26,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-11-25 18:08:26,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-11-25 18:08:27,576 WARN L838 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_main_~i~0#1| 0)) (forall ((|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse0 (* 4294967296 |aux_div_ULTIMATE.start_main_~i~0#1_45|))) (or (< 2147483647 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (<= c_~N~0 (+ .cse0 |aux_mod_ULTIMATE.start_main_~i~0#1_45|)) (< (+ .cse0 |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) c_~N~0) (< |aux_mod_ULTIMATE.start_main_~i~0#1_45| 0) (let ((.cse1 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (and (or (< 2147483647 .cse1) (forall ((v_ArrVal_247 Int) (v_ArrVal_252 Int)) (= 1 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8)) v_ArrVal_247) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_252) |c_ULTIMATE.start_main_~b~0#1.offset|)))) (or (<= .cse1 2147483647) (forall ((v_ArrVal_247 Int) (v_ArrVal_252 Int)) (= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8) (- 34359738368)) v_ArrVal_247) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_252) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)))))))) (or (<= c_~N~0 0) (< 1 c_~N~0)) (forall ((|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse2 (* 4294967296 |aux_div_ULTIMATE.start_main_~i~0#1_45|))) (or (<= c_~N~0 (+ .cse2 |aux_mod_ULTIMATE.start_main_~i~0#1_45|)) (<= 4294967296 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (let ((.cse3 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (and (or (< 2147483647 .cse3) (forall ((v_ArrVal_247 Int) (v_ArrVal_252 Int)) (= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8)) v_ArrVal_247) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~b~0#1.offset| (- 34359738368)) v_ArrVal_252) |c_ULTIMATE.start_main_~b~0#1.offset|) 1))) (or (forall ((v_ArrVal_247 Int) (v_ArrVal_252 Int)) (= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8) (- 34359738368)) v_ArrVal_247) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~b~0#1.offset| (- 34359738368)) v_ArrVal_252) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)) (<= .cse3 2147483647)))) (< (+ .cse2 |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) c_~N~0) (<= |aux_mod_ULTIMATE.start_main_~i~0#1_45| 2147483647))))) is different from false [2021-11-25 18:08:27,683 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:08:27,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:08:27,695 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:08:27,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 8 [2021-11-25 18:08:27,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-25 18:08:27,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 217 treesize of output 207 [2021-11-25 18:08:27,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 797 treesize of output 781 [2021-11-25 18:08:28,570 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-11-25 18:08:28,571 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:28,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376190472] [2021-11-25 18:08:28,571 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:08:28,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719231251] [2021-11-25 18:08:28,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719231251] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:08:28,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1809874464] [2021-11-25 18:08:28,573 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 18:08:28,573 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:08:28,574 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:08:28,574 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:08:28,574 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:08:28,703 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-25 18:08:28,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-25 18:08:28,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2021-11-25 18:08:28,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:08:28,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:28,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:28,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:28,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:28,949 INFO L354 Elim1Store]: treesize reduction 318, result has 12.4 percent of original size [2021-11-25 18:08:28,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 408 treesize of output 447 [2021-11-25 18:08:29,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:29,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:29,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:29,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:29,108 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:08:29,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 450 treesize of output 353 [2021-11-25 18:08:29,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:29,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 53 [2021-11-25 18:08:29,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:29,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:29,326 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 63 treesize of output 63 [2021-11-25 18:08:29,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:29,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:29,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:29,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:29,469 INFO L354 Elim1Store]: treesize reduction 323, result has 15.9 percent of original size [2021-11-25 18:08:29,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 165 treesize of output 225 [2021-11-25 18:08:29,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:29,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:29,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:29,509 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:08:29,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 201 treesize of output 93 [2021-11-25 18:08:29,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:29,562 INFO L354 Elim1Store]: treesize reduction 46, result has 38.7 percent of original size [2021-11-25 18:08:29,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 152 [2021-11-25 18:08:29,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:29,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:29,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:29,636 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:08:29,637 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 90 treesize of output 93 [2021-11-25 18:08:29,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:29,671 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:08:30,020 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '831#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ (* 4 |ULTIMATE.start_main_~i~0#1|) (* 4 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8))) |ULTIMATE.start_main_#t~mem13#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 18:08:30,020 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:08:30,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:08:30,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-11-25 18:08:30,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385377613] [2021-11-25 18:08:30,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:08:30,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-25 18:08:30,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:30,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-25 18:08:30,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=474, Unknown=2, NotChecked=94, Total=702 [2021-11-25 18:08:30,022 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 22 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:32,334 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (< |c_ULTIMATE.start_main_~i~0#1| c_~N~0))) (and (not (= |c_ULTIMATE.start_main_~i~0#1| 0)) (or (= 1 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|)) .cse0) (forall ((|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse1 (* 4294967296 |aux_div_ULTIMATE.start_main_~i~0#1_45|))) (or (< 2147483647 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (<= c_~N~0 (+ .cse1 |aux_mod_ULTIMATE.start_main_~i~0#1_45|)) (< (+ .cse1 |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) c_~N~0) (< |aux_mod_ULTIMATE.start_main_~i~0#1_45| 0) (let ((.cse2 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (and (or (< 2147483647 .cse2) (forall ((v_ArrVal_247 Int) (v_ArrVal_252 Int)) (= 1 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8)) v_ArrVal_247) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_252) |c_ULTIMATE.start_main_~b~0#1.offset|)))) (or (<= .cse2 2147483647) (forall ((v_ArrVal_247 Int) (v_ArrVal_252 Int)) (= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8) (- 34359738368)) v_ArrVal_247) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_252) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)))))))) (<= c_~N~0 2147483647) (or (<= c_~N~0 0) (< 1 c_~N~0)) (= |c_ULTIMATE.start_main_~i~0#1| 1) (or (<= (div (* c_~N~0 (- 1)) (- 4294967296)) (+ (div (+ (- 2) c_~N~0) 4294967296) 1)) .cse0) (= |c_ULTIMATE.start_main_~b~0#1.offset| 0) (forall ((|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse3 (* 4294967296 |aux_div_ULTIMATE.start_main_~i~0#1_45|))) (or (<= c_~N~0 (+ .cse3 |aux_mod_ULTIMATE.start_main_~i~0#1_45|)) (<= 4294967296 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (let ((.cse4 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (and (or (< 2147483647 .cse4) (forall ((v_ArrVal_247 Int) (v_ArrVal_252 Int)) (= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8)) v_ArrVal_247) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~b~0#1.offset| (- 34359738368)) v_ArrVal_252) |c_ULTIMATE.start_main_~b~0#1.offset|) 1))) (or (forall ((v_ArrVal_247 Int) (v_ArrVal_252 Int)) (= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8) (- 34359738368)) v_ArrVal_247) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~b~0#1.offset| (- 34359738368)) v_ArrVal_252) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)) (<= .cse4 2147483647)))) (< (+ .cse3 |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) c_~N~0) (<= |aux_mod_ULTIMATE.start_main_~i~0#1_45| 2147483647)))))) is different from false [2021-11-25 18:08:33,823 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (= 1 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|)))) (and (<= c_~N~0 2147483647) (forall ((v_ArrVal_252 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse0 (* 4294967296 |aux_div_ULTIMATE.start_main_~i~0#1_45|))) (or (< 2147483647 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (<= c_~N~0 (+ .cse0 |aux_mod_ULTIMATE.start_main_~i~0#1_45|)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_252) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (< (+ .cse0 |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) c_~N~0) (< |aux_mod_ULTIMATE.start_main_~i~0#1_45| 0)))) .cse1 (or (<= c_~N~0 0) (< 1 c_~N~0)) (= 2 |c_ULTIMATE.start_main_~i~0#1|) (or (< (div (+ (* |c_ULTIMATE.start_main_~i~0#1| (- 1)) 1) (- 4294967296)) (+ (div (+ (- 1) c_~N~0) 4294967296) 1)) (and .cse1 (< |c_ULTIMATE.start_main_~i~0#1| (+ c_~N~0 1)))) (forall ((v_ArrVal_252 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse2 (* 4294967296 |aux_div_ULTIMATE.start_main_~i~0#1_45|))) (or (<= c_~N~0 (+ .cse2 |aux_mod_ULTIMATE.start_main_~i~0#1_45|)) (<= 4294967296 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (< (+ .cse2 |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) c_~N~0) (<= |aux_mod_ULTIMATE.start_main_~i~0#1_45| 2147483647) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~b~0#1.offset| (- 34359738368)) v_ArrVal_252) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)))) (= |c_ULTIMATE.start_main_~b~0#1.offset| 0) (<= c_~N~0 3) (< 2 c_~N~0))) is different from false [2021-11-25 18:08:35,844 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 (+ 2 |c_ULTIMATE.start_main_~i~0#1|)) (.cse0 (< |c_ULTIMATE.start_main_~i~0#1| c_~N~0)) (.cse3 (<= (div (* c_~N~0 (- 1)) (- 4294967296)) (+ (div (+ (- 2) c_~N~0) 4294967296) 1))) (.cse5 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (and (not (= |c_ULTIMATE.start_main_~i~0#1| 0)) (or (= 1 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|)) .cse0) (forall ((|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse1 (* 4294967296 |aux_div_ULTIMATE.start_main_~i~0#1_45|))) (or (< 2147483647 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (<= c_~N~0 (+ .cse1 |aux_mod_ULTIMATE.start_main_~i~0#1_45|)) (< (+ .cse1 |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) c_~N~0) (< |aux_mod_ULTIMATE.start_main_~i~0#1_45| 0) (let ((.cse2 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (and (or (< 2147483647 .cse2) (forall ((v_ArrVal_247 Int) (v_ArrVal_252 Int)) (= 1 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8)) v_ArrVal_247) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_252) |c_ULTIMATE.start_main_~b~0#1.offset|)))) (or (<= .cse2 2147483647) (forall ((v_ArrVal_247 Int) (v_ArrVal_252 Int)) (= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8) (- 34359738368)) v_ArrVal_247) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_252) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)))))))) (or .cse3 (< .cse4 c_~N~0) (<= c_~N~0 .cse5)) (<= c_~N~0 2147483647) (or .cse3 (<= c_~N~0 .cse4) (< (+ 3 |c_ULTIMATE.start_main_~i~0#1|) c_~N~0)) (or (<= c_~N~0 0) (< 1 c_~N~0)) (or .cse3 .cse0) (or .cse3 (<= c_~N~0 |c_ULTIMATE.start_main_~i~0#1|) (< .cse5 c_~N~0)) (forall ((|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse6 (* 4294967296 |aux_div_ULTIMATE.start_main_~i~0#1_45|))) (or (<= c_~N~0 (+ .cse6 |aux_mod_ULTIMATE.start_main_~i~0#1_45|)) (<= 4294967296 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (let ((.cse7 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (and (or (< 2147483647 .cse7) (forall ((v_ArrVal_247 Int) (v_ArrVal_252 Int)) (= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8)) v_ArrVal_247) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~b~0#1.offset| (- 34359738368)) v_ArrVal_252) |c_ULTIMATE.start_main_~b~0#1.offset|) 1))) (or (forall ((v_ArrVal_247 Int) (v_ArrVal_252 Int)) (= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8) (- 34359738368)) v_ArrVal_247) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~b~0#1.offset| (- 34359738368)) v_ArrVal_252) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)) (<= .cse7 2147483647)))) (< (+ .cse6 |aux_mod_ULTIMATE.start_main_~i~0#1_45| 1) c_~N~0) (<= |aux_mod_ULTIMATE.start_main_~i~0#1_45| 2147483647)))))) is different from false [2021-11-25 18:08:38,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:38,365 INFO L93 Difference]: Finished difference Result 122 states and 142 transitions. [2021-11-25 18:08:38,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-25 18:08:38,366 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-25 18:08:38,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:38,369 INFO L225 Difference]: With dead ends: 122 [2021-11-25 18:08:38,369 INFO L226 Difference]: Without dead ends: 115 [2021-11-25 18:08:38,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=771, Invalid=2666, Unknown=5, NotChecked=590, Total=4032 [2021-11-25 18:08:38,373 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 125 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:38,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 124 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 286 Invalid, 0 Unknown, 109 Unchecked, 0.9s Time] [2021-11-25 18:08:38,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-25 18:08:38,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 43. [2021-11-25 18:08:38,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:38,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2021-11-25 18:08:38,391 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 13 [2021-11-25 18:08:38,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:38,392 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2021-11-25 18:08:38,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:38,392 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2021-11-25 18:08:38,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 18:08:38,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:38,393 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:08:38,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-25 18:08:38,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:38,602 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:08:38,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:38,602 INFO L85 PathProgramCache]: Analyzing trace with hash 221349744, now seen corresponding path program 1 times [2021-11-25 18:08:38,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:38,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699362381] [2021-11-25 18:08:38,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:38,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:38,628 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:08:38,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567822045] [2021-11-25 18:08:38,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:38,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:38,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:08:38,630 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:08:38,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:08:38,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:38,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-25 18:08:38,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:08:38,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 18:08:38,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:38,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:38,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:08:39,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-25 18:08:39,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:39,059 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:08:39,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2021-11-25 18:08:39,221 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:08:39,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 32 [2021-11-25 18:08:39,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:39,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:08:39,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:08:40,705 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (.cse1 (= |c_ULTIMATE.start_main_~i~0#1| 0))) (and (not (= .cse0 0)) (or (not .cse1) (= (select (let ((.cse2 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (store .cse2 (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod .cse0 4294967296) 8)) (let ((.cse3 (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8))) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse2) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse3)) (select .cse2 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse3)))))) (+ |c_ULTIMATE.start_main_~b~0#1.offset| 8)) 9)) (or .cse1 (forall ((v_ArrVal_305 (Array Int Int))) (= 9 (select (store v_ArrVal_305 (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296) 8)) (let ((.cse4 (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8))) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_305) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse4)) (select v_ArrVal_305 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse4))))) (+ |c_ULTIMATE.start_main_~b~0#1.offset| 8))))))) is different from false [2021-11-25 18:08:41,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:08:41,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 38 [2021-11-25 18:08:41,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:08:41,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 8 [2021-11-25 18:08:41,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-25 18:08:41,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 58 [2021-11-25 18:08:41,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-25 18:08:41,195 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:41,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699362381] [2021-11-25 18:08:41,195 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:08:41,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567822045] [2021-11-25 18:08:41,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567822045] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:08:41,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [639157449] [2021-11-25 18:08:41,198 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:08:41,198 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:08:41,198 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:08:41,198 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:08:41,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:08:41,334 INFO L354 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2021-11-25 18:08:41,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 60 [2021-11-25 18:08:41,490 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-25 18:08:41,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-25 18:08:41,521 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:08:41,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:41,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:41,634 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-25 18:08:41,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 134 [2021-11-25 18:08:41,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:41,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 36 [2021-11-25 18:08:41,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:41,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 34 [2021-11-25 18:08:41,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:41,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:41,741 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 63 treesize of output 63 [2021-11-25 18:08:41,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:41,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:41,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:41,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:41,919 INFO L354 Elim1Store]: treesize reduction 323, result has 15.9 percent of original size [2021-11-25 18:08:41,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 137 treesize of output 197 [2021-11-25 18:08:41,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:41,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:41,984 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:08:41,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 122 treesize of output 64 [2021-11-25 18:08:42,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:42,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:42,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:42,010 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:08:42,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 201 treesize of output 66 [2021-11-25 18:08:42,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:42,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:42,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:42,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:42,091 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:08:42,091 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 90 treesize of output 93 [2021-11-25 18:08:42,278 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:08:42,968 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1258#(and (<= 0 ~N~0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 18:08:42,968 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:08:42,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:08:42,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-11-25 18:08:42,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195829284] [2021-11-25 18:08:42,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:08:42,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-25 18:08:42,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:42,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-25 18:08:42,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=476, Unknown=2, NotChecked=44, Total=600 [2021-11-25 18:08:42,970 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:43,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:43,356 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-11-25 18:08:43,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:08:43,358 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-25 18:08:43,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:43,359 INFO L225 Difference]: With dead ends: 50 [2021-11-25 18:08:43,359 INFO L226 Difference]: Without dead ends: 40 [2021-11-25 18:08:43,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=93, Invalid=559, Unknown=2, NotChecked=48, Total=702 [2021-11-25 18:08:43,362 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:43,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 27 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 71 Invalid, 0 Unknown, 28 Unchecked, 0.3s Time] [2021-11-25 18:08:43,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-25 18:08:43,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-25 18:08:43,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:43,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2021-11-25 18:08:43,375 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 14 [2021-11-25 18:08:43,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:43,375 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2021-11-25 18:08:43,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:43,376 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2021-11-25 18:08:43,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 18:08:43,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:43,377 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:08:43,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-25 18:08:43,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:43,595 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:08:43,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:43,595 INFO L85 PathProgramCache]: Analyzing trace with hash -149523490, now seen corresponding path program 2 times [2021-11-25 18:08:43,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:43,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152877939] [2021-11-25 18:08:43,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:43,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:43,621 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:08:43,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [429098519] [2021-11-25 18:08:43,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:08:43,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:43,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:08:43,628 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:08:43,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 18:08:43,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 18:08:43,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:08:43,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:08:43,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:08:43,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:08:43,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:08:44,058 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:08:44,058 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:44,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152877939] [2021-11-25 18:08:44,059 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:08:44,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429098519] [2021-11-25 18:08:44,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429098519] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:08:44,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [912325249] [2021-11-25 18:08:44,062 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:08:44,063 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:08:44,063 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:08:44,063 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:08:44,064 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:08:44,221 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-25 18:08:44,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-25 18:08:44,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2021-11-25 18:08:44,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:08:44,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:44,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:44,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:44,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:44,559 INFO L354 Elim1Store]: treesize reduction 318, result has 12.4 percent of original size [2021-11-25 18:08:44,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 408 treesize of output 447 [2021-11-25 18:08:44,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:44,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:44,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:44,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:44,714 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:08:44,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 448 treesize of output 378 [2021-11-25 18:08:44,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:44,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 83 [2021-11-25 18:08:44,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:44,905 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 63 treesize of output 63 [2021-11-25 18:08:44,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:44,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:44,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:44,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:44,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:45,077 INFO L354 Elim1Store]: treesize reduction 323, result has 15.9 percent of original size [2021-11-25 18:08:45,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 162 treesize of output 222 [2021-11-25 18:08:45,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:45,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:45,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:45,108 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:08:45,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 201 treesize of output 120 [2021-11-25 18:08:45,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:45,147 INFO L354 Elim1Store]: treesize reduction 46, result has 38.7 percent of original size [2021-11-25 18:08:45,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 125 [2021-11-25 18:08:45,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:45,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:45,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:45,205 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:08:45,206 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 90 treesize of output 93 [2021-11-25 18:08:45,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:45,417 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:08:45,912 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1514#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 18:08:45,912 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:08:45,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:08:45,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-25 18:08:45,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917882846] [2021-11-25 18:08:45,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:08:45,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 18:08:45,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:45,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 18:08:45,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-11-25 18:08:45,914 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:46,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:46,180 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2021-11-25 18:08:46,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:08:46,180 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-25 18:08:46,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:46,181 INFO L225 Difference]: With dead ends: 60 [2021-11-25 18:08:46,181 INFO L226 Difference]: Without dead ends: 53 [2021-11-25 18:08:46,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-11-25 18:08:46,183 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 59 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:46,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 36 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:08:46,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-25 18:08:46,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2021-11-25 18:08:46,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:46,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2021-11-25 18:08:46,195 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 15 [2021-11-25 18:08:46,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:46,196 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2021-11-25 18:08:46,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:46,196 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2021-11-25 18:08:46,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 18:08:46,197 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:46,197 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:08:46,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:08:46,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:46,405 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:08:46,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:46,405 INFO L85 PathProgramCache]: Analyzing trace with hash 2050156925, now seen corresponding path program 6 times [2021-11-25 18:08:46,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:46,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846959510] [2021-11-25 18:08:46,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:46,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:46,440 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:08:46,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885884575] [2021-11-25 18:08:46,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:08:46,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:46,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:08:46,455 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:08:46,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 18:08:46,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:08:46,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:08:46,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 18:08:46,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:08:46,637 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:08:46,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:08:46,719 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:08:46,720 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:46,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846959510] [2021-11-25 18:08:46,720 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:08:46,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885884575] [2021-11-25 18:08:46,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885884575] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:08:46,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1301259036] [2021-11-25 18:08:46,723 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 18:08:46,723 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:08:46,723 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:08:46,723 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:08:46,723 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:08:46,880 INFO L354 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2021-11-25 18:08:46,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 60 [2021-11-25 18:08:47,041 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-25 18:08:47,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-25 18:08:47,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:47,068 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:08:47,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:47,161 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-25 18:08:47,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 134 [2021-11-25 18:08:47,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:08:47,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 65 [2021-11-25 18:08:47,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:47,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 36 [2021-11-25 18:08:47,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:47,306 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 63 treesize of output 63 [2021-11-25 18:08:47,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:47,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:47,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:47,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:47,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:47,455 INFO L354 Elim1Store]: treesize reduction 323, result has 15.9 percent of original size [2021-11-25 18:08:47,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 200 [2021-11-25 18:08:47,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:47,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:47,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:47,501 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:08:47,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 201 treesize of output 66 [2021-11-25 18:08:47,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:47,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:47,534 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:08:47,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 122 treesize of output 64 [2021-11-25 18:08:47,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:47,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:47,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:47,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:47,597 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:08:47,597 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 90 treesize of output 93 [2021-11-25 18:08:47,625 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:08:48,014 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1785#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ (* 4 |ULTIMATE.start_main_~i~0#1|) (* 4 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8))) |ULTIMATE.start_main_#t~mem13#1|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 18:08:48,014 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:08:48,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:08:48,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-11-25 18:08:48,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964935343] [2021-11-25 18:08:48,018 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:08:48,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 18:08:48,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:48,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 18:08:48,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-11-25 18:08:48,020 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:48,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:48,229 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2021-11-25 18:08:48,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:08:48,229 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-25 18:08:48,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:48,230 INFO L225 Difference]: With dead ends: 84 [2021-11-25 18:08:48,231 INFO L226 Difference]: Without dead ends: 73 [2021-11-25 18:08:48,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-11-25 18:08:48,232 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 86 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:48,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 48 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:08:48,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-25 18:08:48,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 39. [2021-11-25 18:08:48,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:48,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2021-11-25 18:08:48,247 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 15 [2021-11-25 18:08:48,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:48,247 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2021-11-25 18:08:48,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:48,248 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2021-11-25 18:08:48,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 18:08:48,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:48,249 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:08:48,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:08:48,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 18:08:48,470 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:08:48,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:48,470 INFO L85 PathProgramCache]: Analyzing trace with hash -582184476, now seen corresponding path program 7 times [2021-11-25 18:08:48,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:48,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544307704] [2021-11-25 18:08:48,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:48,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:48,511 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:08:48,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261677575] [2021-11-25 18:08:48,511 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:08:48,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:48,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:08:48,526 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:08:48,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 18:08:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:08:49,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-25 18:08:49,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:08:49,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:49,642 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 64 treesize of output 57 [2021-11-25 18:08:49,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:49,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:49,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:49,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 68 [2021-11-25 18:08:49,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:49,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2021-11-25 18:08:49,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:49,694 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 21 treesize of output 20 [2021-11-25 18:08:49,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:49,713 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 21 treesize of output 20 [2021-11-25 18:08:49,784 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:08:49,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:08:49,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 18:08:50,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2021-11-25 18:08:50,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 206 [2021-11-25 18:08:50,765 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:08:50,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 18:08:50,783 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:08:50,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 8 [2021-11-25 18:08:50,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2021-11-25 18:08:50,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 206 [2021-11-25 18:08:50,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-25 18:08:50,950 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:08:50,950 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:08:50,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544307704] [2021-11-25 18:08:50,950 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:08:50,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261677575] [2021-11-25 18:08:50,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261677575] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:08:50,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [587108657] [2021-11-25 18:08:50,953 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 18:08:50,953 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:08:50,954 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:08:50,954 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:08:50,954 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:08:51,104 INFO L354 Elim1Store]: treesize reduction 97, result has 31.2 percent of original size [2021-11-25 18:08:51,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 60 [2021-11-25 18:08:51,261 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-25 18:08:51,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-25 18:08:51,286 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:08:51,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:51,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:51,370 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-25 18:08:51,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 134 [2021-11-25 18:08:51,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:51,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 36 [2021-11-25 18:08:51,414 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:08:51,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 65 [2021-11-25 18:08:51,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:51,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:51,461 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 63 treesize of output 63 [2021-11-25 18:08:51,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:51,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:51,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:51,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:51,631 INFO L354 Elim1Store]: treesize reduction 323, result has 15.9 percent of original size [2021-11-25 18:08:51,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 200 [2021-11-25 18:08:51,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:51,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:51,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:51,665 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:08:51,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 201 treesize of output 93 [2021-11-25 18:08:51,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:51,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:51,707 INFO L354 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-11-25 18:08:51,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 126 [2021-11-25 18:08:51,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:51,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:51,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:51,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:51,782 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:08:51,783 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 90 treesize of output 93 [2021-11-25 18:08:51,816 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:08:52,135 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2089#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= ~N~0 2147483647) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ (* 4 |ULTIMATE.start_main_~i~0#1|) (* 4 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8))) |ULTIMATE.start_main_#t~mem13#1|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= |ULTIMATE.start_main_~a~0#1.offset| 0))' at error location [2021-11-25 18:08:52,135 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:08:52,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:08:52,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-11-25 18:08:52,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213210031] [2021-11-25 18:08:52,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:08:52,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-25 18:08:52,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:08:52,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-25 18:08:52,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-11-25 18:08:52,137 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:52,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:08:52,836 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2021-11-25 18:08:52,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 18:08:52,837 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-25 18:08:52,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:08:52,838 INFO L225 Difference]: With dead ends: 85 [2021-11-25 18:08:52,838 INFO L226 Difference]: Without dead ends: 83 [2021-11-25 18:08:52,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2021-11-25 18:08:52,840 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:08:52,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 84 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 180 Invalid, 0 Unknown, 58 Unchecked, 0.4s Time] [2021-11-25 18:08:52,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-25 18:08:52,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 34. [2021-11-25 18:08:52,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:52,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2021-11-25 18:08:52,851 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 15 [2021-11-25 18:08:52,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:08:52,852 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2021-11-25 18:08:52,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:08:52,852 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2021-11-25 18:08:52,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 18:08:52,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:08:52,853 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:08:52,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:08:53,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-25 18:08:53,069 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:08:53,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:08:53,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1236512951, now seen corresponding path program 3 times [2021-11-25 18:08:53,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:08:53,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643577086] [2021-11-25 18:08:53,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:08:53,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:08:53,094 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:08:53,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1058321978] [2021-11-25 18:08:53,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:08:53,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:08:53,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:08:53,095 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:08:53,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 18:08:53,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:08:53,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:08:53,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-25 18:08:53,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:08:53,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 18:08:53,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:08:53,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:53,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2021-11-25 18:08:53,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:53,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:53,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:53,632 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 36 treesize of output 34 [2021-11-25 18:08:53,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:53,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 18:08:53,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:53,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:53,740 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-25 18:08:53,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 42 [2021-11-25 18:08:53,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:53,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:53,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:53,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:08:53,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:53,787 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 18:08:53,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 54 [2021-11-25 18:08:53,974 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:08:53,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:08:54,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:08:54,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:08:55,453 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (= |c_ULTIMATE.start_main_~i~0#1| 0))) (and (not (= (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 0)) (or (not .cse0) (forall ((v_ArrVal_593 Int)) (= 9 (select (store (let ((.cse1 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (store .cse1 (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296) 8)) (let ((.cse2 (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8))) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse1) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse2)) (select .cse1 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse2)))))) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 8)) v_ArrVal_593) (+ |c_ULTIMATE.start_main_~b~0#1.offset| 8))))) (or .cse0 (forall ((v_ArrVal_593 Int) (v_ArrVal_588 (Array Int Int))) (= 9 (select (store (store v_ArrVal_588 (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296) 8)) (let ((.cse3 (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8))) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_588) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse3)) (select v_ArrVal_588 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse3))))) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 8)) v_ArrVal_593) (+ |c_ULTIMATE.start_main_~b~0#1.offset| 8))))))) is different from false [2021-11-25 18:08:57,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:08:57,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 60 [2021-11-25 18:08:59,818 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:08:59,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 38 [2021-11-25 18:08:59,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:08:59,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 8 [2021-11-25 18:08:59,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-25 18:09:00,692 INFO L354 Elim1Store]: treesize reduction 65, result has 57.5 percent of original size [2021-11-25 18:09:00,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 1921 treesize of output 1334 [2021-11-25 18:09:00,787 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:09:00,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1334 treesize of output 1322 [2021-11-25 18:09:00,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:09:00,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1322 treesize of output 1294 [2021-11-25 18:09:00,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1157 treesize of output 1151 [2021-11-25 18:19:00,838 INFO L354 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2021-11-25 18:19:00,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 299 treesize of output 286 [2021-11-25 18:19:01,421 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-25 18:19:01,421 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:19:01,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643577086] [2021-11-25 18:19:01,421 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:19:01,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058321978] [2021-11-25 18:19:01,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058321978] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:19:01,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [75480839] [2021-11-25 18:19:01,423 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 18:19:01,423 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:19:01,424 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:19:01,424 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:19:01,424 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:19:01,553 INFO L354 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2021-11-25 18:19:01,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2021-11-25 18:19:01,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2021-11-25 18:19:01,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:19:01,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:19:01,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:19:01,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:19:01,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:19:01,790 INFO L354 Elim1Store]: treesize reduction 318, result has 12.4 percent of original size [2021-11-25 18:19:01,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 408 treesize of output 447 [2021-11-25 18:19:01,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:19:01,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:19:01,932 INFO L354 Elim1Store]: treesize reduction 72, result has 4.0 percent of original size [2021-11-25 18:19:01,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 396 treesize of output 352 [2021-11-25 18:19:02,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:19:02,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 53 [2021-11-25 18:19:02,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:19:02,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:19:02,082 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 63 treesize of output 63 [2021-11-25 18:19:02,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:19:02,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:19:02,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:19:02,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:19:02,251 INFO L354 Elim1Store]: treesize reduction 323, result has 15.9 percent of original size [2021-11-25 18:19:02,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 165 treesize of output 225 [2021-11-25 18:19:02,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:19:02,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:19:02,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:19:02,274 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:19:02,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 234 treesize of output 126 [2021-11-25 18:19:02,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:19:02,323 INFO L354 Elim1Store]: treesize reduction 46, result has 38.7 percent of original size [2021-11-25 18:19:02,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 241 treesize of output 158 [2021-11-25 18:19:02,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:19:02,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:19:02,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:19:02,389 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:19:02,390 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 90 treesize of output 93 [2021-11-25 18:19:02,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:19:02,569 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:19:03,005 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2403#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 18:19:03,005 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:19:03,005 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:19:03,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-11-25 18:19:03,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393653322] [2021-11-25 18:19:03,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:19:03,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-25 18:19:03,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:19:03,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-25 18:19:03,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=611, Unknown=1, NotChecked=50, Total=756 [2021-11-25 18:19:03,007 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:19:03,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:19:03,937 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2021-11-25 18:19:03,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-25 18:19:03,938 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-25 18:19:03,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:19:03,938 INFO L225 Difference]: With dead ends: 50 [2021-11-25 18:19:03,938 INFO L226 Difference]: Without dead ends: 48 [2021-11-25 18:19:03,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=129, Invalid=804, Unknown=1, NotChecked=58, Total=992 [2021-11-25 18:19:03,940 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:19:03,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 47 Unchecked, 0.5s Time] [2021-11-25 18:19:03,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-25 18:19:03,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-11-25 18:19:03,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.255813953488372) internal successors, (54), 43 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:19:03,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2021-11-25 18:19:03,955 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 16 [2021-11-25 18:19:03,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:19:03,955 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2021-11-25 18:19:03,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:19:03,956 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2021-11-25 18:19:03,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 18:19:03,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:19:03,957 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:19:03,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-25 18:19:04,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 18:19:04,159 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:19:04,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:19:04,159 INFO L85 PathProgramCache]: Analyzing trace with hash -774659120, now seen corresponding path program 4 times [2021-11-25 18:19:04,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:19:04,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215533474] [2021-11-25 18:19:04,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:19:04,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:19:04,182 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:19:04,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328485418] [2021-11-25 18:19:04,183 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:19:04,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:19:04,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:19:04,190 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:19:04,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39111f78-c7e6-4d05-b880-474e141c553a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 18:19:05,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:19:05,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-25 18:19:05,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:19:05,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 18:19:05,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 18:19:05,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:19:05,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:19:05,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:19:05,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:19:05,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:19:05,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:19:05,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-25 18:19:05,294 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 18:19:05,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 145 treesize of output 133 [2021-11-25 18:19:05,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:19:05,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:19:05,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:19:05,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:19:05,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:19:05,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:19:05,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:19:05,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 161 [2021-11-25 18:19:05,382 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:19:05,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:19:05,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:19:05,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:19:05,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 77 [2021-11-25 18:19:05,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:19:05,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:19:05,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:19:05,534 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:19:05,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 44 [2021-11-25 18:19:05,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:19:05,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:19:05,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:19:05,574 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:19:05,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 44 [2021-11-25 18:19:05,738 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:19:05,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:19:06,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:19:06,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-11-25 18:19:07,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:19:07,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:19:09,658 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (= |c_ULTIMATE.start_main_~i~0#1| 0))) (and (or .cse0 (and (not (= (+ 3 |c_ULTIMATE.start_main_~i~0#1|) 0)) (forall ((v_ArrVal_694 Int) (v_ArrVal_683 (Array Int Int)) (v_ArrVal_689 Int)) (= (select (store (store (store v_ArrVal_683 (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296) 8)) (let ((.cse1 (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8))) (+ (select v_ArrVal_683 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse1)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_683) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1))))) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 8)) v_ArrVal_689) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod (+ 3 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 8)) v_ArrVal_694) (+ |c_ULTIMATE.start_main_~b~0#1.offset| 8)) 9)))) (or (forall ((v_ArrVal_694 Int) (v_ArrVal_689 Int)) (= (select (store (store (let ((.cse2 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (store .cse2 (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296) 8)) (let ((.cse3 (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8))) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse2) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse3)) (select .cse2 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse3)))))) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 8)) v_ArrVal_689) (+ |c_ULTIMATE.start_main_~b~0#1.offset| (* (mod (+ 3 |c_ULTIMATE.start_main_~i~0#1|) 4294967296) 8)) v_ArrVal_694) (+ |c_ULTIMATE.start_main_~b~0#1.offset| 8)) 9)) (not .cse0)))) is different from false [2021-11-25 18:19:09,882 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (and (or (<= .cse0 2147483647) (forall ((v_ArrVal_694 Int) (v_ArrVal_680 Int) (v_ArrVal_689 Int)) (= 9 (let ((.cse2 (+ |c_ULTIMATE.start_main_~b~0#1.offset| 8))) (select (store (store (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8) (- 34359738368)) v_ArrVal_680)))) (let ((.cse1 (store (select .cse3 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (store .cse1 .cse2 (+ 1 (select (select (store .cse3 |c_ULTIMATE.start_main_~b~0#1.base| .cse1) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))))) (+ |c_ULTIMATE.start_main_~b~0#1.offset| 16) v_ArrVal_689) (+ |c_ULTIMATE.start_main_~b~0#1.offset| 24) v_ArrVal_694) .cse2))))) (or (let ((.cse4 (= |c_ULTIMATE.start_main_~i~0#1| 0))) (and (or (not .cse4) (forall ((v_ArrVal_694 Int) (v_ArrVal_681 (Array Int Int)) (v_ArrVal_689 Int)) (= 9 (let ((.cse6 (+ |c_ULTIMATE.start_main_~b~0#1.offset| 8))) (select (store (store (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_681))) (let ((.cse5 (store (select .cse7 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (store .cse5 .cse6 (+ (select (select (store .cse7 |c_ULTIMATE.start_main_~b~0#1.base| .cse5) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)))) (+ |c_ULTIMATE.start_main_~b~0#1.offset| 16) v_ArrVal_689) (+ |c_ULTIMATE.start_main_~b~0#1.offset| 24) v_ArrVal_694) .cse6))))) (or .cse4 (forall ((v_ArrVal_694 Int) (v_ArrVal_680 Int) (v_ArrVal_689 Int)) (= 9 (let ((.cse9 (+ |c_ULTIMATE.start_main_~b~0#1.offset| 8))) (select (store (store (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8)) v_ArrVal_680)))) (let ((.cse8 (store (select .cse10 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| 1))) (store .cse8 .cse9 (+ (select (select (store .cse10 |c_ULTIMATE.start_main_~b~0#1.base| .cse8) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1)))) (+ |c_ULTIMATE.start_main_~b~0#1.offset| 16) v_ArrVal_689) (+ |c_ULTIMATE.start_main_~b~0#1.offset| 24) v_ArrVal_694) .cse9))))))) (< 2147483647 .cse0)))) is different from false [2021-11-25 18:19:10,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:19:10,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 65 [2021-11-25 18:19:12,341 INFO L354 Elim1Store]: treesize reduction 55, result has 34.5 percent of original size [2021-11-25 18:19:12,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 116 treesize of output 79 [2021-11-25 18:19:14,115 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:19:14,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 38 [2021-11-25 18:19:14,208 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:19:14,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 8 [2021-11-25 18:19:14,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:19:14,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:19:14,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:19:14,489 INFO L354 Elim1Store]: treesize reduction 102, result has 46.3 percent of original size [2021-11-25 18:19:14,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 46374 treesize of output 26877 [2021-11-25 18:19:14,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:19:14,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29517 treesize of output 28051