./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/nr3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/nr3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur --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 4885a4fffd0288753086daaa59bdb12816a7be62636dc49311bbb97ad277d866 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:29:41,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:29:41,864 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:29:41,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:29:41,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:29:41,888 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:29:41,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:29:41,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:29:41,893 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:29:41,894 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:29:41,895 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:29:41,897 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:29:41,897 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:29:41,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:29:41,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:29:41,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:29:41,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:29:41,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:29:41,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:29:41,908 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:29:41,909 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:29:41,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:29:41,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:29:41,914 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:29:41,917 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:29:41,918 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:29:41,919 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:29:41,920 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:29:41,920 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:29:41,922 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:29:41,922 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:29:41,923 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:29:41,924 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:29:41,925 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:29:41,926 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:29:41,927 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:29:41,928 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:29:41,928 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:29:41,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:29:41,930 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:29:41,931 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:29:41,932 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:29:41,958 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:29:41,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:29:41,959 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:29:41,960 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:29:41,960 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:29:41,961 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:29:41,961 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:29:41,962 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:29:41,962 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:29:41,962 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:29:41,963 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:29:41,963 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:29:41,963 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:29:41,964 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:29:41,964 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:29:41,965 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:29:41,965 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:29:41,965 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:29:41,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:29:41,967 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:29:41,967 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:29:41,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:29:41,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:29:41,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:29:41,969 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:29:41,969 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:29:41,970 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:29:41,970 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:29:41,970 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:29:41,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:29:41,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:29:41,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:29:41,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:29:41,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:29:41,973 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:29:41,973 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:29:41,973 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:29:41,974 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:29:41,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:29:41,974 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:29:41,975 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:29:41,975 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4885a4fffd0288753086daaa59bdb12816a7be62636dc49311bbb97ad277d866 [2022-11-26 00:29:42,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:29:42,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:29:42,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:29:42,291 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:29:42,292 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:29:42,293 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-tiling/nr3.c [2022-11-26 00:29:45,350 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:29:45,536 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:29:45,537 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/sv-benchmarks/c/array-tiling/nr3.c [2022-11-26 00:29:45,543 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/data/9d8d7d220/58414669f95543a886b23c8fe25d3868/FLAGf5f9f43bd [2022-11-26 00:29:45,563 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/data/9d8d7d220/58414669f95543a886b23c8fe25d3868 [2022-11-26 00:29:45,569 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:29:45,571 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:29:45,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:29:45,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:29:45,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:29:45,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:29:45" (1/1) ... [2022-11-26 00:29:45,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@315839f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:29:45, skipping insertion in model container [2022-11-26 00:29:45,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:29:45" (1/1) ... [2022-11-26 00:29:45,593 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:29:45,609 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:29:45,748 WARN L237 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_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/sv-benchmarks/c/array-tiling/nr3.c[394,407] [2022-11-26 00:29:45,766 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:29:45,774 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:29:45,789 WARN L237 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_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/sv-benchmarks/c/array-tiling/nr3.c[394,407] [2022-11-26 00:29:45,797 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:29:45,811 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:29:45,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:29:45 WrapperNode [2022-11-26 00:29:45,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:29:45,813 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:29:45,814 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:29:45,814 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:29:45,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:29:45" (1/1) ... [2022-11-26 00:29:45,830 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:29:45" (1/1) ... [2022-11-26 00:29:45,858 INFO L138 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2022-11-26 00:29:45,859 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:29:45,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:29:45,860 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:29:45,860 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:29:45,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:29:45" (1/1) ... [2022-11-26 00:29:45,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:29:45" (1/1) ... [2022-11-26 00:29:45,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:29:45" (1/1) ... [2022-11-26 00:29:45,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:29:45" (1/1) ... [2022-11-26 00:29:45,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:29:45" (1/1) ... [2022-11-26 00:29:45,891 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:29:45" (1/1) ... [2022-11-26 00:29:45,893 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:29:45" (1/1) ... [2022-11-26 00:29:45,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:29:45" (1/1) ... [2022-11-26 00:29:45,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:29:45,897 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:29:45,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:29:45,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:29:45,898 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:29:45" (1/1) ... [2022-11-26 00:29:45,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:29:45,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:29:45,935 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:29:45,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:29:45,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:29:45,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:29:45,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:29:45,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:29:45,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:29:45,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:29:45,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:29:45,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:29:46,059 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:29:46,062 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:29:46,303 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:29:46,379 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:29:46,379 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-26 00:29:46,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:29:46 BoogieIcfgContainer [2022-11-26 00:29:46,382 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:29:46,385 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:29:46,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:29:46,388 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:29:46,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:29:45" (1/3) ... [2022-11-26 00:29:46,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb094c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:29:46, skipping insertion in model container [2022-11-26 00:29:46,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:29:45" (2/3) ... [2022-11-26 00:29:46,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb094c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:29:46, skipping insertion in model container [2022-11-26 00:29:46,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:29:46" (3/3) ... [2022-11-26 00:29:46,391 INFO L112 eAbstractionObserver]: Analyzing ICFG nr3.c [2022-11-26 00:29:46,413 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:29:46,414 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:29:46,469 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:29:46,477 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@461efe96, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:29:46,478 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:29:46,483 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) 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) [2022-11-26 00:29:46,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:29:46,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:29:46,495 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:29:46,496 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:29:46,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:29:46,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1525475312, now seen corresponding path program 1 times [2022-11-26 00:29:46,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:29:46,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141765950] [2022-11-26 00:29:46,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:46,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:29:46,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:47,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:29:47,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:29:47,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141765950] [2022-11-26 00:29:47,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141765950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:29:47,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:29:47,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:29:47,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398430888] [2022-11-26 00:29:47,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:29:47,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:29:47,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:29:47,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:29:47,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:29:47,236 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) 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) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2022-11-26 00:29:47,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:29:47,339 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2022-11-26 00:29:47,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:29:47,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 [2022-11-26 00:29:47,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:29:47,349 INFO L225 Difference]: With dead ends: 26 [2022-11-26 00:29:47,349 INFO L226 Difference]: Without dead ends: 12 [2022-11-26 00:29:47,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:29:47,356 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:29:47,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 12 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:29:47,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-26 00:29:47,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2022-11-26 00:29:47,393 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) [2022-11-26 00:29:47,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-11-26 00:29:47,395 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2022-11-26 00:29:47,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:29:47,396 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-11-26 00:29:47,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2022-11-26 00:29:47,397 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-11-26 00:29:47,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 00:29:47,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:29:47,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:29:47,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:29:47,398 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:29:47,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:29:47,399 INFO L85 PathProgramCache]: Analyzing trace with hash 776722866, now seen corresponding path program 1 times [2022-11-26 00:29:47,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:29:47,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701630420] [2022-11-26 00:29:47,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:47,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:29:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:47,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:29:47,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:29:47,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701630420] [2022-11-26 00:29:47,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701630420] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:29:47,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:29:47,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:29:47,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288192824] [2022-11-26 00:29:47,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:29:47,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:29:47,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:29:47,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:29:47,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:29:47,470 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:47,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:29:47,496 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2022-11-26 00:29:47,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:29:47,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-26 00:29:47,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:29:47,497 INFO L225 Difference]: With dead ends: 19 [2022-11-26 00:29:47,498 INFO L226 Difference]: Without dead ends: 12 [2022-11-26 00:29:47,498 INFO L412 NwaCegarLoop]: 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 [2022-11-26 00:29:47,500 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:29:47,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:29:47,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-26 00:29:47,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-26 00:29:47,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:47,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-11-26 00:29:47,508 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2022-11-26 00:29:47,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:29:47,509 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-11-26 00:29:47,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:47,509 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-11-26 00:29:47,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 00:29:47,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:29:47,510 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:29:47,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:29:47,511 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:29:47,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:29:47,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1383686568, now seen corresponding path program 1 times [2022-11-26 00:29:47,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:29:47,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499886325] [2022-11-26 00:29:47,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:47,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:29:47,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:47,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:29:47,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:29:47,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499886325] [2022-11-26 00:29:47,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499886325] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:29:47,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156628062] [2022-11-26 00:29:47,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:47,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:29:47,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:29:47,595 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:29:47,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:29:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:47,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:29:47,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:29:47,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:29:47,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:29:47,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:29:47,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156628062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:29:47,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [443512276] [2022-11-26 00:29:47,795 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-26 00:29:47,795 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:29:47,800 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:29:47,807 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:29:47,808 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:29:47,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:47,996 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:29:47,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-26 00:29:48,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:48,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:29:48,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:48,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2022-11-26 00:29:48,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:48,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:48,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:48,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:48,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:48,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:29:48,600 INFO L321 Elim1Store]: treesize reduction 323, result has 15.2 percent of original size [2022-11-26 00:29:48,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 508 treesize of output 568 [2022-11-26 00:29:49,149 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-26 00:29:49,150 INFO L350 Elim1Store]: Elim1 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 1008 treesize of output 962 [2022-11-26 00:29:49,204 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:29:49,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 939 treesize of output 925 [2022-11-26 00:29:50,125 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:29:50,134 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 15 [2022-11-26 00:29:50,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:50,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:50,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:50,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:50,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:50,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:50,312 INFO L321 Elim1Store]: treesize reduction 164, result has 15.0 percent of original size [2022-11-26 00:29:50,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 4 case distinctions, treesize of input 268 treesize of output 354 [2022-11-26 00:29:50,479 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:29:50,599 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:29:50,608 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:29:50,642 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 15 [2022-11-26 00:29:50,651 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:29:50,700 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:29:50,709 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:29:50,760 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:29:50,770 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 15 [2022-11-26 00:29:50,918 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:29:50,927 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:29:50,966 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 15 [2022-11-26 00:29:50,976 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:29:50,989 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:29:51,954 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '177#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (ite |ULTIMATE.start_main_#t~short10#1| 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (not (<= |ULTIMATE.start_main_~MINVAL~0#1| |ULTIMATE.start_main_#t~mem8#1|)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) (+ |ULTIMATE.start_main_~#volArray~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= |ULTIMATE.start_main_~MINVAL~0#1| 2) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) (+ |ULTIMATE.start_main_~#volArray~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem9#1| 0)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-26 00:29:51,955 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:29:51,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:29:51,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-11-26 00:29:51,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973627985] [2022-11-26 00:29:51,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:29:51,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:29:51,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:29:51,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:29:51,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:29:51,957 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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) [2022-11-26 00:29:52,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:29:52,000 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2022-11-26 00:29:52,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:29:52,001 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-26 00:29:52,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:29:52,001 INFO L225 Difference]: With dead ends: 22 [2022-11-26 00:29:52,001 INFO L226 Difference]: Without dead ends: 14 [2022-11-26 00:29:52,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:29:52,003 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:29:52,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:29:52,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-26 00:29:52,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-26 00:29:52,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 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) [2022-11-26 00:29:52,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-26 00:29:52,009 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2022-11-26 00:29:52,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:29:52,009 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-26 00:29:52,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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) [2022-11-26 00:29:52,010 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-26 00:29:52,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 00:29:52,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:29:52,011 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:29:52,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:29:52,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:29:52,225 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:29:52,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:29:52,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1321164392, now seen corresponding path program 2 times [2022-11-26 00:29:52,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:29:52,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299782757] [2022-11-26 00:29:52,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:52,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:29:52,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:53,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:29:53,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:29:53,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299782757] [2022-11-26 00:29:53,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299782757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:29:53,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033513497] [2022-11-26 00:29:53,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:29:53,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:29:53,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:29:53,079 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:29:53,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:29:53,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-26 00:29:53,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:29:53,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-26 00:29:53,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:29:53,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:29:53,294 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 28 [2022-11-26 00:29:53,351 INFO L350 Elim1Store]: Elim1 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 40 treesize of output 48 [2022-11-26 00:29:53,374 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:29:53,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 19 treesize of output 29 [2022-11-26 00:29:53,418 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 22 [2022-11-26 00:29:53,428 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:29:53,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 23 [2022-11-26 00:29:53,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:53,627 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:29:53,627 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 56 treesize of output 36 [2022-11-26 00:29:53,652 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:29:53,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:29:53,787 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 9 [2022-11-26 00:29:53,896 INFO L350 Elim1Store]: Elim1 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 49 treesize of output 45 [2022-11-26 00:29:53,989 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:29:53,990 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 50 [2022-11-26 00:29:54,001 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:29:54,002 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 15 [2022-11-26 00:29:54,047 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:29:54,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 336 treesize of output 331 [2022-11-26 00:29:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:29:54,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033513497] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:29:54,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [707481505] [2022-11-26 00:29:54,206 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-26 00:29:54,206 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:29:54,207 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:29:54,207 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:29:54,207 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:29:54,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:54,258 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:29:54,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-26 00:29:54,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:54,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:29:54,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:54,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:54,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 197 [2022-11-26 00:29:54,387 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:29:54,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:54,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:54,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:54,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:54,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:54,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:54,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:54,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:54,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:54,583 INFO L321 Elim1Store]: treesize reduction 327, result has 6.3 percent of original size [2022-11-26 00:29:54,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 14 case distinctions, treesize of input 777 treesize of output 796 [2022-11-26 00:29:54,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:54,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:54,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:54,661 INFO L321 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2022-11-26 00:29:54,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 648 treesize of output 641 [2022-11-26 00:29:55,033 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-26 00:29:55,034 INFO L350 Elim1Store]: Elim1 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 471 treesize of output 447 [2022-11-26 00:29:55,044 INFO L350 Elim1Store]: Elim1 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 39 treesize of output 19 [2022-11-26 00:29:55,218 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:29:55,228 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 15 [2022-11-26 00:29:55,279 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:29:55,286 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:29:55,325 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 15 [2022-11-26 00:29:55,333 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:29:55,438 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:29:55,446 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:29:55,471 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 15 [2022-11-26 00:29:55,480 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:29:55,490 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:29:56,585 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '330#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (ite |ULTIMATE.start_main_#t~short10#1| 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (not (<= |ULTIMATE.start_main_~MINVAL~0#1| |ULTIMATE.start_main_#t~mem8#1|)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) (+ |ULTIMATE.start_main_~#volArray~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#volArray~0#1.base|) (+ |ULTIMATE.start_main_~#volArray~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (not (= |ULTIMATE.start_main_#t~mem9#1| 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 [2022-11-26 00:29:56,585 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:29:56,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:29:56,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-11-26 00:29:56,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814033261] [2022-11-26 00:29:56,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:29:56,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-26 00:29:56,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:29:56,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-26 00:29:56,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2022-11-26 00:29:56,588 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:58,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:29:58,728 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-11-26 00:29:58,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-26 00:29:58,732 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-26 00:29:58,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:29:58,732 INFO L225 Difference]: With dead ends: 40 [2022-11-26 00:29:58,733 INFO L226 Difference]: Without dead ends: 38 [2022-11-26 00:29:58,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=465, Invalid=2085, Unknown=0, NotChecked=0, Total=2550 [2022-11-26 00:29:58,735 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 191 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:29:58,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 35 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:29:58,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-26 00:29:58,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 16. [2022-11-26 00:29:58,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 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) [2022-11-26 00:29:58,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-11-26 00:29:58,745 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2022-11-26 00:29:58,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:29:58,745 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-11-26 00:29:58,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:58,745 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-11-26 00:29:58,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:29:58,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:29:58,746 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:29:58,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-26 00:29:58,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:29:58,951 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:29:58,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:29:58,952 INFO L85 PathProgramCache]: Analyzing trace with hash 277174554, now seen corresponding path program 1 times [2022-11-26 00:29:58,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:29:58,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608217329] [2022-11-26 00:29:58,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:58,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:29:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:59,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:29:59,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:29:59,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608217329] [2022-11-26 00:29:59,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608217329] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:29:59,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487003722] [2022-11-26 00:29:59,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:59,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:29:59,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:29:59,625 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:29:59,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:29:59,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:59,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-26 00:29:59,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:29:59,798 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 45 [2022-11-26 00:29:59,806 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-26 00:29:59,833 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 1 [2022-11-26 00:29:59,902 INFO L350 Elim1Store]: Elim1 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 45 treesize of output 53 [2022-11-26 00:29:59,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:59,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 28 [2022-11-26 00:30:00,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:30:00,158 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:30:00,158 INFO L350 Elim1Store]: Elim1 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 49 treesize of output 36 [2022-11-26 00:30:00,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:30:00,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:30:00,306 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 9 [2022-11-26 00:30:00,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:30:00,387 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 50 [2022-11-26 00:30:00,397 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:30:00,397 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 15 [2022-11-26 00:30:00,465 INFO L350 Elim1Store]: Elim1 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 67 treesize of output 59 [2022-11-26 00:30:00,482 INFO L350 Elim1Store]: Elim1 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 65 treesize of output 59 [2022-11-26 00:30:00,493 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:30:00,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 89 treesize of output 86 [2022-11-26 00:30:00,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:30:00,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487003722] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:30:00,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1439101631] [2022-11-26 00:30:00,663 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:30:00,664 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:30:00,664 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:30:00,664 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:30:00,664 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:30:00,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:00,713 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:30:00,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-26 00:30:00,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:00,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:30:00,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:00,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:00,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 197 [2022-11-26 00:30:00,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:00,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:00,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:00,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 109 [2022-11-26 00:30:00,860 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 3 [2022-11-26 00:30:00,929 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 15 [2022-11-26 00:30:00,937 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:30:01,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:01,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:01,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:01,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:01,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:01,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:01,075 INFO L321 Elim1Store]: treesize reduction 164, result has 15.0 percent of original size [2022-11-26 00:30:01,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 4 case distinctions, treesize of input 268 treesize of output 354 [2022-11-26 00:30:01,191 INFO L321 Elim1Store]: treesize reduction 24, result has 59.3 percent of original size [2022-11-26 00:30:01,192 INFO L350 Elim1Store]: Elim1 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 325 treesize of output 325 [2022-11-26 00:30:01,217 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 3 [2022-11-26 00:30:01,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:01,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:01,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:01,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:01,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:01,300 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-26 00:30:01,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 273 treesize of output 245 [2022-11-26 00:30:01,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:01,393 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-26 00:30:01,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 239 treesize of output 223 [2022-11-26 00:30:01,733 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 15 [2022-11-26 00:30:01,740 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:30:01,783 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:30:01,791 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:30:01,823 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:30:01,831 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 15 [2022-11-26 00:30:02,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:30:02,087 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 15 [2022-11-26 00:30:02,094 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:30:02,099 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:30:02,820 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '566#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 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.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 [2022-11-26 00:30:02,820 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:30:02,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:30:02,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 26 [2022-11-26 00:30:02,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663572057] [2022-11-26 00:30:02,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:30:02,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-26 00:30:02,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:30:02,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-26 00:30:02,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 00:30:02,822 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 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) [2022-11-26 00:30:03,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:30:03,808 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-11-26 00:30:03,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-26 00:30:03,808 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 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 [2022-11-26 00:30:03,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:30:03,809 INFO L225 Difference]: With dead ends: 44 [2022-11-26 00:30:03,809 INFO L226 Difference]: Without dead ends: 42 [2022-11-26 00:30:03,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=486, Invalid=2594, Unknown=0, NotChecked=0, Total=3080 [2022-11-26 00:30:03,811 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 84 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:30:03,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 39 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:30:03,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-26 00:30:03,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 19. [2022-11-26 00:30:03,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:30:03,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-11-26 00:30:03,829 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2022-11-26 00:30:03,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:30:03,829 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-11-26 00:30:03,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 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) [2022-11-26 00:30:03,830 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-11-26 00:30:03,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-26 00:30:03,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:30:03,831 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:30:03,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:30:04,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:30:04,038 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:30:04,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:30:04,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1909695912, now seen corresponding path program 2 times [2022-11-26 00:30:04,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:30:04,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299598684] [2022-11-26 00:30:04,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:30:04,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:30:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:04,629 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:30:04,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:30:04,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299598684] [2022-11-26 00:30:04,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299598684] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:30:04,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416637786] [2022-11-26 00:30:04,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:30:04,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:30:04,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:30:04,635 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:30:04,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:30:04,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:30:04,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:30:04,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-26 00:30:04,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:30:04,781 INFO L350 Elim1Store]: Elim1 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 32 treesize of output 43 [2022-11-26 00:30:04,787 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 13 treesize of output 12 [2022-11-26 00:30:04,809 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 10 [2022-11-26 00:30:04,812 INFO L350 Elim1Store]: Elim1 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 3 [2022-11-26 00:30:05,069 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-26 00:30:05,069 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 17 [2022-11-26 00:30:05,085 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:30:05,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:30:05,239 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:30:05,240 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 50 [2022-11-26 00:30:05,248 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:30:05,249 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 15 [2022-11-26 00:30:05,274 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:30:05,284 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:30:05,284 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 27 [2022-11-26 00:30:05,359 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:30:05,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416637786] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:30:05,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [188824] [2022-11-26 00:30:05,362 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:30:05,362 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:30:05,363 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:30:05,363 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:30:05,363 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:30:05,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:05,420 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:30:05,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-26 00:30:05,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:05,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:30:05,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:05,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2022-11-26 00:30:05,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:05,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:05,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:05,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:05,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:05,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:30:05,682 INFO L321 Elim1Store]: treesize reduction 323, result has 15.2 percent of original size [2022-11-26 00:30:05,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 508 treesize of output 568 [2022-11-26 00:30:05,976 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-26 00:30:05,977 INFO L350 Elim1Store]: Elim1 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 583 treesize of output 541 [2022-11-26 00:30:06,008 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:30:06,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 514 treesize of output 500 [2022-11-26 00:30:06,270 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 15 [2022-11-26 00:30:06,277 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:30:06,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:06,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:06,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:06,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:06,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:06,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:06,395 INFO L321 Elim1Store]: treesize reduction 164, result has 15.0 percent of original size [2022-11-26 00:30:06,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 4 case distinctions, treesize of input 268 treesize of output 354 [2022-11-26 00:30:06,431 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:30:06,538 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:30:06,544 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:30:06,573 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 15 [2022-11-26 00:30:06,580 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:30:06,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:30:06,651 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 15 [2022-11-26 00:30:06,658 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:30:06,892 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:30:06,898 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:30:06,929 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:30:06,937 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 15 [2022-11-26 00:30:06,941 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:30:07,716 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '842#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 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.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 [2022-11-26 00:30:07,716 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:30:07,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:30:07,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-11-26 00:30:07,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646949570] [2022-11-26 00:30:07,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:30:07,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-26 00:30:07,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:30:07,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-26 00:30:07,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1025, Unknown=0, NotChecked=0, Total=1190 [2022-11-26 00:30:07,719 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 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) [2022-11-26 00:30:08,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:30:08,763 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2022-11-26 00:30:08,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-26 00:30:08,763 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-26 00:30:08,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:30:08,764 INFO L225 Difference]: With dead ends: 43 [2022-11-26 00:30:08,764 INFO L226 Difference]: Without dead ends: 41 [2022-11-26 00:30:08,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=416, Invalid=2236, Unknown=0, NotChecked=0, Total=2652 [2022-11-26 00:30:08,766 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 90 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:30:08,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 50 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:30:08,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-26 00:30:08,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 27. [2022-11-26 00:30:08,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:30:08,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-11-26 00:30:08,783 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2022-11-26 00:30:08,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:30:08,784 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-11-26 00:30:08,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 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) [2022-11-26 00:30:08,784 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-11-26 00:30:08,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-26 00:30:08,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:30:08,785 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:30:08,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:30:08,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-26 00:30:08,991 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:30:08,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:30:08,991 INFO L85 PathProgramCache]: Analyzing trace with hash -608835494, now seen corresponding path program 3 times [2022-11-26 00:30:08,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:30:08,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060292667] [2022-11-26 00:30:08,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:30:08,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:30:09,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:09,325 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:30:09,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:30:09,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060292667] [2022-11-26 00:30:09,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060292667] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:30:09,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270270510] [2022-11-26 00:30:09,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:30:09,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:30:09,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:30:09,328 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:30:09,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:30:09,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:30:09,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:30:09,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:30:09,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:30:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:30:09,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:30:09,876 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:30:09,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270270510] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:30:09,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1317179582] [2022-11-26 00:30:09,878 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:30:09,878 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:30:09,878 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:30:09,879 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:30:09,879 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:30:09,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:09,928 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-26 00:30:09,929 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-26 00:30:09,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:09,977 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:30:09,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-26 00:30:10,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:10,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2022-11-26 00:30:10,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:10,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:10,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:10,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:10,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:10,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:30:10,228 INFO L321 Elim1Store]: treesize reduction 323, result has 15.2 percent of original size [2022-11-26 00:30:10,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 508 treesize of output 568 [2022-11-26 00:30:10,744 INFO L321 Elim1Store]: treesize reduction 58, result has 1.7 percent of original size [2022-11-26 00:30:10,744 INFO L350 Elim1Store]: Elim1 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 1010 treesize of output 956 [2022-11-26 00:30:10,759 INFO L350 Elim1Store]: Elim1 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 905 treesize of output 895 [2022-11-26 00:30:10,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 940 treesize of output 908 [2022-11-26 00:30:10,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:10,803 INFO L350 Elim1Store]: Elim1 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 927 treesize of output 910 [2022-11-26 00:30:11,089 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:30:11,103 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 15 [2022-11-26 00:30:11,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:11,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:11,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:11,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:11,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:11,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:11,245 INFO L321 Elim1Store]: treesize reduction 164, result has 15.0 percent of original size [2022-11-26 00:30:11,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 4 case distinctions, treesize of input 268 treesize of output 354 [2022-11-26 00:30:11,427 INFO L321 Elim1Store]: treesize reduction 24, result has 59.3 percent of original size [2022-11-26 00:30:11,428 INFO L350 Elim1Store]: Elim1 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 325 treesize of output 323 [2022-11-26 00:30:11,444 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 3 [2022-11-26 00:30:11,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:11,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:11,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:11,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:11,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:11,510 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-26 00:30:11,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 276 treesize of output 246 [2022-11-26 00:30:11,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:11,631 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-26 00:30:11,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 227 [2022-11-26 00:30:11,720 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 15 [2022-11-26 00:30:11,728 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:30:11,774 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:30:11,780 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:30:11,806 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:30:11,815 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 15 [2022-11-26 00:30:12,045 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:30:12,053 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:30:12,081 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:30:12,090 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 15 [2022-11-26 00:30:12,099 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:30:12,878 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1131#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 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.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 [2022-11-26 00:30:12,879 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:30:12,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:30:12,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2022-11-26 00:30:12,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016555338] [2022-11-26 00:30:12,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:30:12,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-26 00:30:12,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:30:12,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-26 00:30:12,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-11-26 00:30:12,881 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 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) [2022-11-26 00:30:13,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:30:13,227 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2022-11-26 00:30:13,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-26 00:30:13,227 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 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) Word has length 21 [2022-11-26 00:30:13,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:30:13,228 INFO L225 Difference]: With dead ends: 44 [2022-11-26 00:30:13,228 INFO L226 Difference]: Without dead ends: 29 [2022-11-26 00:30:13,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=229, Invalid=1103, Unknown=0, NotChecked=0, Total=1332 [2022-11-26 00:30:13,229 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 50 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:30:13,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 34 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:30:13,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-26 00:30:13,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2022-11-26 00:30:13,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 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) [2022-11-26 00:30:13,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-11-26 00:30:13,245 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 21 [2022-11-26 00:30:13,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:30:13,246 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-11-26 00:30:13,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 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) [2022-11-26 00:30:13,246 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-11-26 00:30:13,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-26 00:30:13,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:30:13,247 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-26 00:30:13,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-26 00:30:13,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-26 00:30:13,452 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:30:13,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:30:13,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1002376144, now seen corresponding path program 4 times [2022-11-26 00:30:13,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:30:13,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134697825] [2022-11-26 00:30:13,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:30:13,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:30:13,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:14,328 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:30:14,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:30:14,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134697825] [2022-11-26 00:30:14,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134697825] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:30:14,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747135515] [2022-11-26 00:30:14,329 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:30:14,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:30:14,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:30:14,335 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:30:14,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:30:14,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:14,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-26 00:30:14,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:30:14,550 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 45 [2022-11-26 00:30:14,555 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-26 00:30:14,625 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-26 00:30:14,625 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 26 treesize of output 25 [2022-11-26 00:30:14,665 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-26 00:30:14,665 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 26 treesize of output 25 [2022-11-26 00:30:14,711 INFO L321 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-11-26 00:30:14,711 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-26 00:30:14,809 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 14 [2022-11-26 00:30:14,832 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:30:14,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:30:14,927 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:30:15,014 INFO L350 Elim1Store]: Elim1 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 28 [2022-11-26 00:30:27,528 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:30:27,528 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 50 [2022-11-26 00:30:27,541 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:30:27,542 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 15 [2022-11-26 00:30:27,571 INFO L350 Elim1Store]: Elim1 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 52 treesize of output 40 [2022-11-26 00:30:27,591 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:30:27,602 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:30:27,603 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 33 [2022-11-26 00:30:27,886 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:30:27,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747135515] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:30:27,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [471964807] [2022-11-26 00:30:27,888 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:30:27,888 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:30:27,889 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:30:27,889 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:30:27,889 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:30:27,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:27,939 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:30:27,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-26 00:30:27,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:27,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:30:27,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:27,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:27,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 197 [2022-11-26 00:30:28,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:28,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:28,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 98 [2022-11-26 00:30:28,072 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 3 [2022-11-26 00:30:28,119 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 15 [2022-11-26 00:30:28,128 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:30:28,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:28,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:28,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:28,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:28,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:28,266 INFO L321 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2022-11-26 00:30:28,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 2 case distinctions, treesize of input 230 treesize of output 250 [2022-11-26 00:30:28,312 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:30:28,329 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 15 [2022-11-26 00:30:28,374 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:30:28,383 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:30:28,415 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 15 [2022-11-26 00:30:28,423 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:30:28,650 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:30:28,657 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:30:28,685 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:30:28,696 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 15 [2022-11-26 00:30:28,705 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:30:29,673 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1431#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 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.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 [2022-11-26 00:30:29,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:30:29,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:30:29,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2022-11-26 00:30:29,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845597880] [2022-11-26 00:30:29,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:30:29,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-26 00:30:29,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:30:29,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-26 00:30:29,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1915, Unknown=4, NotChecked=0, Total=2162 [2022-11-26 00:30:29,677 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 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) [2022-11-26 00:30:31,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:30:31,039 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-11-26 00:30:31,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-26 00:30:31,040 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 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 23 [2022-11-26 00:30:31,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:30:31,041 INFO L225 Difference]: With dead ends: 50 [2022-11-26 00:30:31,041 INFO L226 Difference]: Without dead ends: 33 [2022-11-26 00:30:31,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=576, Invalid=3842, Unknown=4, NotChecked=0, Total=4422 [2022-11-26 00:30:31,043 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 92 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:30:31,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 56 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:30:31,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-26 00:30:31,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2022-11-26 00:30:31,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 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) [2022-11-26 00:30:31,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-11-26 00:30:31,061 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 23 [2022-11-26 00:30:31,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:30:31,061 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-11-26 00:30:31,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 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) [2022-11-26 00:30:31,061 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-11-26 00:30:31,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-26 00:30:31,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:30:31,062 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-26 00:30:31,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:30:31,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:30:31,267 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:30:31,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:30:31,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1114627102, now seen corresponding path program 5 times [2022-11-26 00:30:31,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:30:31,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359630373] [2022-11-26 00:30:31,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:30:31,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:30:31,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:32,156 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:30:32,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:30:32,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359630373] [2022-11-26 00:30:32,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359630373] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:30:32,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934137744] [2022-11-26 00:30:32,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:30:32,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:30:32,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:30:32,160 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:30:32,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:30:32,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-26 00:30:32,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:30:32,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-26 00:30:32,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:30:32,495 INFO L350 Elim1Store]: Elim1 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 39 treesize of output 50 [2022-11-26 00:30:32,503 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-26 00:30:32,520 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 1 [2022-11-26 00:30:32,545 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 5 [2022-11-26 00:30:32,609 INFO L350 Elim1Store]: Elim1 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 64 treesize of output 72 [2022-11-26 00:30:32,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 39 treesize of output 43 [2022-11-26 00:30:32,644 INFO L350 Elim1Store]: Elim1 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 50 treesize of output 38 [2022-11-26 00:30:32,651 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:30:32,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 38 treesize of output 18 [2022-11-26 00:30:32,762 INFO L350 Elim1Store]: Elim1 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 77 treesize of output 83 [2022-11-26 00:30:32,772 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:30:32,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 54 treesize of output 63 [2022-11-26 00:30:32,848 INFO L350 Elim1Store]: Elim1 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 57 treesize of output 43 [2022-11-26 00:30:32,856 INFO L350 Elim1Store]: Elim1 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 43 treesize of output 14 [2022-11-26 00:30:34,069 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:30:34,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 93 [2022-11-26 00:30:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:30:34,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:30:34,772 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 9 [2022-11-26 00:30:35,000 INFO L350 Elim1Store]: Elim1 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 81 treesize of output 69 [2022-11-26 00:30:35,294 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:30:35,295 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 50 [2022-11-26 00:30:35,308 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:30:35,308 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 15 [2022-11-26 00:30:35,404 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:30:35,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 514 treesize of output 497 [2022-11-26 00:30:36,113 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:30:36,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934137744] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:30:36,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1941475096] [2022-11-26 00:30:36,115 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:30:36,115 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:30:36,116 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:30:36,116 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:30:36,116 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:30:36,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:36,167 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-26 00:30:36,167 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-26 00:30:36,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:36,223 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:30:36,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-26 00:30:36,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:36,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2022-11-26 00:30:36,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:36,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:36,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:36,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:36,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:36,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:30:36,462 INFO L321 Elim1Store]: treesize reduction 323, result has 15.2 percent of original size [2022-11-26 00:30:36,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 16 case distinctions, treesize of input 508 treesize of output 568 [2022-11-26 00:30:37,069 INFO L321 Elim1Store]: treesize reduction 58, result has 1.7 percent of original size [2022-11-26 00:30:37,069 INFO L350 Elim1Store]: Elim1 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 1010 treesize of output 932 [2022-11-26 00:30:37,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 908 treesize of output 852 [2022-11-26 00:30:37,103 INFO L350 Elim1Store]: Elim1 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 897 treesize of output 887 [2022-11-26 00:30:37,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:37,123 INFO L350 Elim1Store]: Elim1 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 895 treesize of output 878 [2022-11-26 00:30:37,528 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 15 [2022-11-26 00:30:37,535 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:30:37,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:37,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:37,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:37,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:37,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:37,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:37,680 INFO L321 Elim1Store]: treesize reduction 164, result has 15.0 percent of original size [2022-11-26 00:30:37,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 4 case distinctions, treesize of input 268 treesize of output 354 [2022-11-26 00:30:37,858 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:30:37,899 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:30:37,905 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:30:37,933 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 15 [2022-11-26 00:30:37,940 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:30:37,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:30:37,996 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 15 [2022-11-26 00:30:38,003 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:30:38,220 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:30:38,228 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:30:38,269 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 17 [2022-11-26 00:30:38,277 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 15 [2022-11-26 00:30:38,288 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:30:39,481 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1790#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 2 |ULTIMATE.start_main_~MINVAL~0#1|) (<= ~CELLCOUNT~0 2147483647) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 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.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#volArray~0#1.base|) (<= |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 [2022-11-26 00:30:39,481 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:30:39,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:30:39,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 39 [2022-11-26 00:30:39,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895140589] [2022-11-26 00:30:39,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:30:39,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-26 00:30:39,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:30:39,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-26 00:30:39,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1899, Unknown=0, NotChecked=0, Total=2162 [2022-11-26 00:30:39,484 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 39 states have internal predecessors, (67), 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) [2022-11-26 00:30:48,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:30:48,165 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2022-11-26 00:30:48,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-26 00:30:48,165 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 39 states have internal predecessors, (67), 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 26 [2022-11-26 00:30:48,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:30:48,166 INFO L225 Difference]: With dead ends: 67 [2022-11-26 00:30:48,166 INFO L226 Difference]: Without dead ends: 37 [2022-11-26 00:30:48,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2359 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=1155, Invalid=6677, Unknown=0, NotChecked=0, Total=7832 [2022-11-26 00:30:48,169 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 140 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:30:48,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 64 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:30:48,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-26 00:30:48,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-26 00:30:48,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 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) [2022-11-26 00:30:48,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-11-26 00:30:48,208 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 26 [2022-11-26 00:30:48,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:30:48,209 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-11-26 00:30:48,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 39 states have internal predecessors, (67), 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) [2022-11-26 00:30:48,209 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-11-26 00:30:48,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-26 00:30:48,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:30:48,210 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-26 00:30:48,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:30:48,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:30:48,417 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:30:48,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:30:48,418 INFO L85 PathProgramCache]: Analyzing trace with hash 838946530, now seen corresponding path program 6 times [2022-11-26 00:30:48,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:30:48,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20585689] [2022-11-26 00:30:48,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:30:48,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:30:48,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:51,200 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 11 proven. 128 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:30:51,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:30:51,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20585689] [2022-11-26 00:30:51,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20585689] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:30:51,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930988281] [2022-11-26 00:30:51,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:30:51,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:30:51,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:30:51,202 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:30:51,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dd6b8c3-fee8-4edc-88ee-48bd51a64cba/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:30:51,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:30:51,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:30:51,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-26 00:30:51,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:30:51,414 INFO L350 Elim1Store]: Elim1 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 39 treesize of output 50 [2022-11-26 00:30:51,421 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-26 00:30:51,511 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 28 [2022-11-26 00:30:51,583 INFO L350 Elim1Store]: Elim1 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 47 treesize of output 55 [2022-11-26 00:30:51,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:51,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 30 [2022-11-26 00:30:51,903 INFO L350 Elim1Store]: Elim1 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 66 treesize of output 72 [2022-11-26 00:30:51,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:51,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:51,932 INFO L321 Elim1Store]: treesize reduction 33, result has 48.4 percent of original size [2022-11-26 00:30:51,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 39 treesize of output 65 [2022-11-26 00:30:51,942 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 1 [2022-11-26 00:30:52,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:52,052 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 28 [2022-11-26 00:30:52,141 INFO L350 Elim1Store]: Elim1 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 47 treesize of output 55 [2022-11-26 00:30:52,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:52,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 30 [2022-11-26 00:30:52,168 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 1 [2022-11-26 00:30:52,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:52,422 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 28 [2022-11-26 00:30:52,529 INFO L350 Elim1Store]: Elim1 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 52 treesize of output 60 [2022-11-26 00:30:52,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:52,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-11-26 00:30:52,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:52,653 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 28 [2022-11-26 00:30:53,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:30:53,348 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:30:53,348 INFO L350 Elim1Store]: Elim1 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 49 treesize of output 36 [2022-11-26 00:30:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 5 proven. 134 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:30:53,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:30:53,757 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 9 [2022-11-26 00:30:53,873 INFO L350 Elim1Store]: Elim1 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 67 treesize of output 59 [2022-11-26 00:30:54,005 INFO L350 Elim1Store]: Elim1 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 387 treesize of output 371 [2022-11-26 00:30:56,595 INFO L350 Elim1Store]: Elim1 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 267 treesize of output 259 [2022-11-26 00:30:56,922 INFO L350 Elim1Store]: Elim1 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 571 treesize of output 563 [2022-11-26 00:31:25,268 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:31:27,341 WARN L837 $PredicateComparison]: unable to prove that (and (< |c_ULTIMATE.start_main_~j~0#1| (+ 2 |c_ULTIMATE.start_main_~MINVAL~0#1|)) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| 2) (< 1 |c_ULTIMATE.start_main_~MINVAL~0#1|) (<= (+ |c_ULTIMATE.start_main_~MINVAL~0#1| 1) |c_ULTIMATE.start_main_~j~0#1|) (forall ((|v_ULTIMATE.start_main_~j~0#1_152| Int) (v_ArrVal_383 Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~j~0#1_152| 2) |c_ULTIMATE.start_main_~j~0#1|)) (forall ((v_ArrVal_384 Int) (|v_ULTIMATE.start_main_~i~0#1_152| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_152|)) (forall ((v_ArrVal_389 Int) (v_ArrVal_398 Int) (v_ArrVal_393 Int) (v_ArrVal_390 Int)) (let ((.cse0 (select (let ((.cse3 (* 12 |v_ULTIMATE.start_main_~i~0#1_152|))) (store (store (store (let ((.cse2 (* 12 |c_ULTIMATE.start_main_~i~0#1|))) (store (let ((.cse1 (* |c_ULTIMATE.start_main_~j~0#1| (- 4)))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1 .cse2) v_ArrVal_383) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1 .cse2 4) v_ArrVal_384)) (+ (* |v_ULTIMATE.start_main_~j~0#1_152| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse2) v_ArrVal_389)) (+ .cse3 (- 12) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_390) (+ .cse3 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 8)) v_ArrVal_393) (+ (- 4) .cse3 |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_398)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)))) (or (< |c_ULTIMATE.start_main_~MINVAL~0#1| (+ .cse0 1)) (= .cse0 0))))))))) is different from false [2022-11-26 00:31:29,377 WARN L837 $PredicateComparison]: unable to prove that (and (<= |c_ULTIMATE.start_main_~MINVAL~0#1| 2) (< 1 |c_ULTIMATE.start_main_~MINVAL~0#1|) (forall ((|v_ULTIMATE.start_main_~j~0#1_152| Int) (v_ArrVal_383 Int)) (or (not (<= |v_ULTIMATE.start_main_~j~0#1_152| 1)) (forall ((v_ArrVal_384 Int) (|v_ULTIMATE.start_main_~i~0#1_152| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_152|)) (forall ((v_ArrVal_389 Int) (v_ArrVal_398 Int) (v_ArrVal_393 Int) (v_ArrVal_390 Int)) (let ((.cse0 (select (let ((.cse2 (* 12 |v_ULTIMATE.start_main_~i~0#1_152|))) (store (store (store (let ((.cse1 (* 12 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (- 12) |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1) v_ArrVal_383) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1 (- 8)) v_ArrVal_384) (+ (* |v_ULTIMATE.start_main_~j~0#1_152| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1) v_ArrVal_389)) (+ .cse2 (- 12) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_390) (+ .cse2 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 8)) v_ArrVal_393) (+ (- 4) .cse2 |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_398)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)))) (or (< |c_ULTIMATE.start_main_~MINVAL~0#1| (+ .cse0 1)) (= .cse0 0))))))))) is different from false [2022-11-26 00:31:31,422 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_153| Int)) (or (forall ((|v_ULTIMATE.start_main_~j~0#1_152| Int) (v_ArrVal_383 Int)) (or (not (<= |v_ULTIMATE.start_main_~j~0#1_152| 1)) (forall ((v_ArrVal_384 Int) (|v_ULTIMATE.start_main_~i~0#1_152| Int)) (or (forall ((v_ArrVal_389 Int) (v_ArrVal_398 Int) (v_ArrVal_393 Int) (v_ArrVal_390 Int)) (let ((.cse0 (select (let ((.cse2 (* 12 |v_ULTIMATE.start_main_~i~0#1_152|))) (store (store (store (let ((.cse1 (* 12 |v_ULTIMATE.start_main_~i~0#1_153|))) (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (- 12) |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1) v_ArrVal_383) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1 (- 8)) v_ArrVal_384) (+ (* |v_ULTIMATE.start_main_~j~0#1_152| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1) v_ArrVal_389)) (+ .cse2 (- 12) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_390) (+ .cse2 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 8)) v_ArrVal_393) (+ (- 4) .cse2 |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_398)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)))) (or (< |c_ULTIMATE.start_main_~MINVAL~0#1| (+ .cse0 1)) (= .cse0 0)))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_153| 1) |v_ULTIMATE.start_main_~i~0#1_152|)))))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_153|)))) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| 2) (< 1 |c_ULTIMATE.start_main_~MINVAL~0#1|)) is different from false [2022-11-26 00:31:31,587 INFO L350 Elim1Store]: Elim1 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 344981475 treesize of output 343932899