./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba --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 52a248b2b2cf395cf0c12ea6447af889ed3691d7fa3d2de2504a7728d19c705b --- 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-b5237d8 [2022-11-22 01:15:11,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:15:11,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:15:11,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:15:11,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:15:11,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:15:11,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:15:11,986 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:15:11,988 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:15:11,989 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:15:11,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:15:12,001 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:15:12,001 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:15:12,003 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:15:12,004 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:15:12,005 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:15:12,006 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:15:12,008 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:15:12,010 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:15:12,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:15:12,027 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:15:12,030 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:15:12,031 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:15:12,032 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:15:12,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:15:12,036 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:15:12,037 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:15:12,038 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:15:12,046 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:15:12,047 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:15:12,047 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:15:12,048 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:15:12,050 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:15:12,052 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:15:12,053 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:15:12,053 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:15:12,054 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:15:12,054 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:15:12,054 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:15:12,055 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:15:12,056 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:15:12,057 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 01:15:12,109 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:15:12,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:15:12,111 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:15:12,111 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:15:12,112 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:15:12,112 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:15:12,112 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:15:12,113 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:15:12,113 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:15:12,113 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:15:12,114 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:15:12,115 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:15:12,115 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:15:12,115 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:15:12,115 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:15:12,116 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:15:12,116 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:15:12,116 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:15:12,118 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:15:12,118 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:15:12,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:15:12,119 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:15:12,119 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:15:12,119 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:15:12,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:15:12,120 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:15:12,120 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:15:12,121 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:15:12,121 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:15:12,121 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:15:12,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:15:12,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:15:12,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:15:12,122 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:15:12,123 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:15:12,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:15:12,123 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:15:12,123 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:15:12,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:15:12,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:15:12,124 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:15:12,124 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_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52a248b2b2cf395cf0c12ea6447af889ed3691d7fa3d2de2504a7728d19c705b [2022-11-22 01:15:12,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:15:12,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:15:12,491 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:15:12,492 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:15:12,493 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:15:12,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2022-11-22 01:15:15,660 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:15:15,972 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:15:15,973 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2022-11-22 01:15:15,982 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/data/cd1f987c0/3a49dd0220da47ac8baa21075b2dbc70/FLAGe1fcff5c5 [2022-11-22 01:15:16,004 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/data/cd1f987c0/3a49dd0220da47ac8baa21075b2dbc70 [2022-11-22 01:15:16,010 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:15:16,012 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:15:16,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:15:16,016 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:15:16,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:15:16,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:15:16" (1/1) ... [2022-11-22 01:15:16,023 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c9c57f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:15:16, skipping insertion in model container [2022-11-22 01:15:16,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:15:16" (1/1) ... [2022-11-22 01:15:16,034 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:15:16,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:15:16,225 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_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2022-11-22 01:15:16,289 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:15:16,302 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:15:16,314 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_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2022-11-22 01:15:16,328 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:15:16,343 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:15:16,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:15:16 WrapperNode [2022-11-22 01:15:16,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:15:16,345 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:15:16,346 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:15:16,346 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:15:16,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:15:16" (1/1) ... [2022-11-22 01:15:16,362 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:15:16" (1/1) ... [2022-11-22 01:15:16,395 INFO L138 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 132 [2022-11-22 01:15:16,399 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:15:16,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:15:16,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:15:16,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:15:16,411 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:15:16" (1/1) ... [2022-11-22 01:15:16,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:15:16" (1/1) ... [2022-11-22 01:15:16,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:15:16" (1/1) ... [2022-11-22 01:15:16,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:15:16" (1/1) ... [2022-11-22 01:15:16,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:15:16" (1/1) ... [2022-11-22 01:15:16,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:15:16" (1/1) ... [2022-11-22 01:15:16,442 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:15:16" (1/1) ... [2022-11-22 01:15:16,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:15:16" (1/1) ... [2022-11-22 01:15:16,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:15:16,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:15:16,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:15:16,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:15:16,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:15:16" (1/1) ... [2022-11-22 01:15:16,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:15:16,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:15:16,496 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:15:16,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:15:16,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:15:16,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:15:16,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 01:15:16,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 01:15:16,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:15:16,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:15:16,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 01:15:16,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:15:16,632 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:15:16,634 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:15:17,013 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:15:17,110 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:15:17,110 INFO L300 CfgBuilder]: Removed 12 assume(true) statements. [2022-11-22 01:15:17,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:15:17 BoogieIcfgContainer [2022-11-22 01:15:17,114 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:15:17,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:15:17,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:15:17,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:15:17,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:15:16" (1/3) ... [2022-11-22 01:15:17,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bfe81ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:15:17, skipping insertion in model container [2022-11-22 01:15:17,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:15:16" (2/3) ... [2022-11-22 01:15:17,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bfe81ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:15:17, skipping insertion in model container [2022-11-22 01:15:17,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:15:17" (3/3) ... [2022-11-22 01:15:17,125 INFO L112 eAbstractionObserver]: Analyzing ICFG copy-partial-3-u.c [2022-11-22 01:15:17,149 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:15:17,159 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:15:17,214 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:15:17,223 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;@2ef0a05b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:15:17,223 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:15:17,228 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 17 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) [2022-11-22 01:15:17,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 01:15:17,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:15:17,236 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:15:17,237 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:15:17,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:15:17,243 INFO L85 PathProgramCache]: Analyzing trace with hash 908962074, now seen corresponding path program 1 times [2022-11-22 01:15:17,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:15:17,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938412753] [2022-11-22 01:15:17,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:17,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:15:17,365 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:15:17,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1067092153] [2022-11-22 01:15:17,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:17,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:15:17,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:15:17,371 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:15:17,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:15:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:15:17,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:15:17,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:15:17,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:15:17,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:15:17,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:15:17,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938412753] [2022-11-22 01:15:17,594 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:15:17,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067092153] [2022-11-22 01:15:17,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067092153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:15:17,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:15:17,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:15:17,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72035910] [2022-11-22 01:15:17,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:15:17,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:15:17,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:15:17,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:15:17,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:15:17,678 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.875) internal successors, (30), 17 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 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) [2022-11-22 01:15:17,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:15:17,764 INFO L93 Difference]: Finished difference Result 35 states and 59 transitions. [2022-11-22 01:15:17,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:15:17,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 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 [2022-11-22 01:15:17,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:15:17,776 INFO L225 Difference]: With dead ends: 35 [2022-11-22 01:15:17,776 INFO L226 Difference]: Without dead ends: 20 [2022-11-22 01:15:17,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:15:17,783 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:15:17,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:15:17,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-22 01:15:17,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-11-22 01:15:17,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:17,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 29 transitions. [2022-11-22 01:15:17,823 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 29 transitions. Word has length 9 [2022-11-22 01:15:17,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:15:17,824 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 29 transitions. [2022-11-22 01:15:17,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 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) [2022-11-22 01:15:17,825 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 29 transitions. [2022-11-22 01:15:17,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 01:15:17,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:15:17,826 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:15:17,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:15:18,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:15:18,042 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:15:18,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:15:18,043 INFO L85 PathProgramCache]: Analyzing trace with hash 648526984, now seen corresponding path program 1 times [2022-11-22 01:15:18,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:15:18,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264572729] [2022-11-22 01:15:18,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:18,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:15:18,072 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:15:18,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [652305521] [2022-11-22 01:15:18,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:18,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:15:18,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:15:18,083 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:15:18,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:15:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:15:18,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:15:18,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:15:18,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:15:18,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:15:18,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:15:18,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264572729] [2022-11-22 01:15:18,220 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:15:18,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652305521] [2022-11-22 01:15:18,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652305521] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:15:18,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:15:18,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:15:18,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901991357] [2022-11-22 01:15:18,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:15:18,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:15:18,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:15:18,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:15:18,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:15:18,224 INFO L87 Difference]: Start difference. First operand 18 states and 29 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:18,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:15:18,345 INFO L93 Difference]: Finished difference Result 47 states and 77 transitions. [2022-11-22 01:15:18,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:15:18,347 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-22 01:15:18,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:15:18,349 INFO L225 Difference]: With dead ends: 47 [2022-11-22 01:15:18,349 INFO L226 Difference]: Without dead ends: 31 [2022-11-22 01:15:18,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:15:18,354 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 59 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:15:18,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 9 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:15:18,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-22 01:15:18,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2022-11-22 01:15:18,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 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) [2022-11-22 01:15:18,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 31 transitions. [2022-11-22 01:15:18,374 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 31 transitions. Word has length 11 [2022-11-22 01:15:18,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:15:18,376 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 31 transitions. [2022-11-22 01:15:18,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:18,376 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 31 transitions. [2022-11-22 01:15:18,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 01:15:18,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:15:18,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:15:18,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:15:18,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-22 01:15:18,588 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:15:18,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:15:18,589 INFO L85 PathProgramCache]: Analyzing trace with hash -603899039, now seen corresponding path program 1 times [2022-11-22 01:15:18,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:15:18,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852095440] [2022-11-22 01:15:18,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:18,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:15:18,599 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:15:18,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2062628884] [2022-11-22 01:15:18,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:18,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:15:18,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:15:18,603 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:15:18,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:15:18,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:15:18,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:15:18,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:15:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:15:18,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:15:18,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:15:18,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852095440] [2022-11-22 01:15:18,729 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:15:18,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062628884] [2022-11-22 01:15:18,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062628884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:15:18,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:15:18,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:15:18,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429965999] [2022-11-22 01:15:18,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:15:18,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:15:18,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:15:18,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:15:18,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:15:18,733 INFO L87 Difference]: Start difference. First operand 20 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2022-11-22 01:15:18,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:15:18,841 INFO L93 Difference]: Finished difference Result 50 states and 79 transitions. [2022-11-22 01:15:18,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:15:18,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-22 01:15:18,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:15:18,847 INFO L225 Difference]: With dead ends: 50 [2022-11-22 01:15:18,847 INFO L226 Difference]: Without dead ends: 32 [2022-11-22 01:15:18,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:15:18,853 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 54 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:15:18,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 8 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:15:18,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-22 01:15:18,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2022-11-22 01:15:18,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:18,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2022-11-22 01:15:18,873 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 13 [2022-11-22 01:15:18,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:15:18,876 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions. [2022-11-22 01:15:18,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2022-11-22 01:15:18,877 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2022-11-22 01:15:18,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 01:15:18,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:15:18,878 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:15:18,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 01:15:19,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:15:19,092 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:15:19,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:15:19,093 INFO L85 PathProgramCache]: Analyzing trace with hash -972286329, now seen corresponding path program 1 times [2022-11-22 01:15:19,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:15:19,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208967230] [2022-11-22 01:15:19,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:19,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:15:19,104 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:15:19,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742542414] [2022-11-22 01:15:19,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:19,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:15:19,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:15:19,116 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:15:19,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:15:19,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:15:19,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:15:19,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:15:19,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:15:19,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:15:19,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:15:19,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:15:19,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208967230] [2022-11-22 01:15:19,267 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:15:19,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742542414] [2022-11-22 01:15:19,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742542414] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:15:19,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1855959963] [2022-11-22 01:15:19,289 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-22 01:15:19,289 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:15:19,293 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:15:19,300 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:15:19,300 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:15:19,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:19,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:19,526 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-11-22 01:15:19,529 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 3 case distinctions, treesize of input 39 treesize of output 63 [2022-11-22 01:15:19,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:19,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:19,708 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:15:19,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:15:19,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:19,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2022-11-22 01:15:20,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:20,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:21,025 INFO L321 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-11-22 01:15:21,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 410 treesize of output 396 [2022-11-22 01:15:21,557 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 28 treesize of output 24 [2022-11-22 01:15:21,797 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 28 treesize of output 24 [2022-11-22 01:15:22,016 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 28 treesize of output 24 [2022-11-22 01:15:22,303 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:15:22,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1855959963] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:15:22,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:15:22,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4] total 11 [2022-11-22 01:15:22,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656401109] [2022-11-22 01:15:22,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:15:22,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:15:22,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:15:22,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:15:22,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-11-22 01:15:22,837 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 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) [2022-11-22 01:15:23,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:15:23,195 INFO L93 Difference]: Finished difference Result 50 states and 73 transitions. [2022-11-22 01:15:23,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:15:23,196 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 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) Word has length 14 [2022-11-22 01:15:23,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:15:23,197 INFO L225 Difference]: With dead ends: 50 [2022-11-22 01:15:23,197 INFO L226 Difference]: Without dead ends: 35 [2022-11-22 01:15:23,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:15:23,201 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:15:23,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 6 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:15:23,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-22 01:15:23,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2022-11-22 01:15:23,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 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) [2022-11-22 01:15:23,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 36 transitions. [2022-11-22 01:15:23,230 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 36 transitions. Word has length 14 [2022-11-22 01:15:23,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:15:23,230 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 36 transitions. [2022-11-22 01:15:23,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 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) [2022-11-22 01:15:23,231 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 36 transitions. [2022-11-22 01:15:23,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-22 01:15:23,231 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:15:23,232 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:15:23,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 01:15:23,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:15:23,438 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:15:23,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:15:23,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1749873230, now seen corresponding path program 1 times [2022-11-22 01:15:23,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:15:23,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392803790] [2022-11-22 01:15:23,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:23,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:15:23,455 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:15:23,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1168520155] [2022-11-22 01:15:23,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:23,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:15:23,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:15:23,458 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:15:23,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:15:23,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:15:23,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:15:23,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:15:23,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:15:23,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:15:23,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:15:23,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:15:23,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392803790] [2022-11-22 01:15:23,597 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:15:23,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168520155] [2022-11-22 01:15:23,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168520155] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:15:23,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [347458368] [2022-11-22 01:15:23,600 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-22 01:15:23,600 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:15:23,601 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:15:23,601 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:15:23,601 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:15:23,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:23,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:23,695 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:15:23,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:15:23,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:23,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:23,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 49 [2022-11-22 01:15:23,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:23,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-11-22 01:15:24,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:24,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:24,138 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-22 01:15:24,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 394 [2022-11-22 01:15:24,292 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 28 treesize of output 24 [2022-11-22 01:15:24,370 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 28 treesize of output 24 [2022-11-22 01:15:24,543 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 24 treesize of output 20 [2022-11-22 01:15:24,657 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 28 treesize of output 24 [2022-11-22 01:15:24,727 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 28 treesize of output 24 [2022-11-22 01:15:24,818 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 28 treesize of output 24 [2022-11-22 01:15:24,939 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 142 treesize of output 120 [2022-11-22 01:15:25,010 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 28 treesize of output 24 [2022-11-22 01:15:25,076 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 28 treesize of output 24 [2022-11-22 01:15:25,153 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 28 treesize of output 24 [2022-11-22 01:15:25,244 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 142 treesize of output 120 [2022-11-22 01:15:25,312 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 28 treesize of output 24 [2022-11-22 01:15:25,382 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 28 treesize of output 24 [2022-11-22 01:15:25,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:25,458 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:15:25,458 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 41 treesize of output 41 [2022-11-22 01:15:25,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:25,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:25,573 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-22 01:15:25,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 175 [2022-11-22 01:15:25,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:25,642 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:25,643 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 49 treesize of output 49 [2022-11-22 01:15:25,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:25,729 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:15:25,730 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 41 treesize of output 41 [2022-11-22 01:15:25,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:25,779 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:25,779 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 49 treesize of output 49 [2022-11-22 01:15:25,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:25,873 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:25,874 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 49 treesize of output 49 [2022-11-22 01:15:25,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:25,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:25,937 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:15:25,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-11-22 01:15:25,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:26,001 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:26,001 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 49 treesize of output 49 [2022-11-22 01:15:26,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:26,067 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:26,068 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 49 treesize of output 49 [2022-11-22 01:15:26,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:26,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:26,127 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:15:26,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-22 01:15:26,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:26,181 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:26,182 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 49 treesize of output 49 [2022-11-22 01:15:26,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:26,314 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:15:26,315 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 41 treesize of output 41 [2022-11-22 01:15:26,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:26,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:26,420 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-22 01:15:26,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2022-11-22 01:15:26,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:26,508 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:26,508 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 49 treesize of output 49 [2022-11-22 01:15:26,515 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:15:27,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [347458368] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:15:27,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:15:27,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 4] total 12 [2022-11-22 01:15:27,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52258368] [2022-11-22 01:15:27,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:15:27,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:15:27,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:15:27,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:15:27,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:15:27,143 INFO L87 Difference]: Start difference. First operand 25 states and 36 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:28,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:15:28,221 INFO L93 Difference]: Finished difference Result 57 states and 86 transitions. [2022-11-22 01:15:28,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 01:15:28,221 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-22 01:15:28,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:15:28,223 INFO L225 Difference]: With dead ends: 57 [2022-11-22 01:15:28,223 INFO L226 Difference]: Without dead ends: 45 [2022-11-22 01:15:28,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-11-22 01:15:28,224 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:15:28,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 9 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:15:28,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-22 01:15:28,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 27. [2022-11-22 01:15:28,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 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) [2022-11-22 01:15:28,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2022-11-22 01:15:28,243 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 19 [2022-11-22 01:15:28,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:15:28,243 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2022-11-22 01:15:28,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:28,244 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2022-11-22 01:15:28,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-22 01:15:28,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:15:28,245 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:15:28,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-22 01:15:28,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:15:28,450 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:15:28,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:15:28,451 INFO L85 PathProgramCache]: Analyzing trace with hash -494766001, now seen corresponding path program 1 times [2022-11-22 01:15:28,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:15:28,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341756156] [2022-11-22 01:15:28,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:28,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:15:28,461 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:15:28,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1021127758] [2022-11-22 01:15:28,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:28,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:15:28,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:15:28,463 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:15:28,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 01:15:28,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:15:28,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:15:28,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:15:28,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:15:28,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:15:28,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:15:28,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:15:28,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341756156] [2022-11-22 01:15:28,612 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:15:28,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021127758] [2022-11-22 01:15:28,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021127758] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:15:28,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1021218261] [2022-11-22 01:15:28,616 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 01:15:28,617 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:15:28,617 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:15:28,617 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:15:28,617 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:15:28,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:28,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:28,726 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:15:28,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:15:28,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:28,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:28,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 49 [2022-11-22 01:15:28,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:28,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2022-11-22 01:15:29,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:29,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:29,133 INFO L321 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-11-22 01:15:29,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 410 treesize of output 396 [2022-11-22 01:15:29,392 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 28 treesize of output 24 [2022-11-22 01:15:29,463 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 28 treesize of output 24 [2022-11-22 01:15:29,597 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 24 treesize of output 20 [2022-11-22 01:15:29,725 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 28 treesize of output 24 [2022-11-22 01:15:29,814 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 28 treesize of output 24 [2022-11-22 01:15:29,890 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 28 treesize of output 24 [2022-11-22 01:15:29,995 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 142 treesize of output 120 [2022-11-22 01:15:30,067 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 28 treesize of output 24 [2022-11-22 01:15:30,134 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 28 treesize of output 24 [2022-11-22 01:15:30,226 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 24 treesize of output 20 [2022-11-22 01:15:30,322 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-22 01:15:30,323 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 134 treesize of output 122 [2022-11-22 01:15:30,428 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 28 treesize of output 24 [2022-11-22 01:15:30,486 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 28 treesize of output 24 [2022-11-22 01:15:30,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:30,553 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:15:30,554 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 41 treesize of output 41 [2022-11-22 01:15:30,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:30,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:30,655 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-22 01:15:30,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 185 [2022-11-22 01:15:30,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:30,743 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:30,743 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 49 treesize of output 49 [2022-11-22 01:15:30,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:30,833 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:15:30,834 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 41 treesize of output 41 [2022-11-22 01:15:30,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:30,878 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:30,878 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 49 treesize of output 49 [2022-11-22 01:15:30,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:30,964 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:15:30,965 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 41 treesize of output 41 [2022-11-22 01:15:31,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:31,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:31,051 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-22 01:15:31,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 163 [2022-11-22 01:15:31,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:31,124 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:31,125 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 49 treesize of output 49 [2022-11-22 01:15:31,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:31,187 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:31,188 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 49 treesize of output 49 [2022-11-22 01:15:31,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:31,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:31,248 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:15:31,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-22 01:15:31,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:31,299 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:31,300 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 49 treesize of output 49 [2022-11-22 01:15:31,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:31,511 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:15:31,511 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 41 treesize of output 41 [2022-11-22 01:15:31,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:31,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:31,624 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-22 01:15:31,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2022-11-22 01:15:31,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:31,706 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:31,706 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 49 treesize of output 49 [2022-11-22 01:15:31,710 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:15:32,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1021218261] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:15:32,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:15:32,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4, 4] total 14 [2022-11-22 01:15:32,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162866204] [2022-11-22 01:15:32,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:15:32,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 01:15:32,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:15:32,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 01:15:32,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-11-22 01:15:32,576 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:33,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:15:33,561 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2022-11-22 01:15:33,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 01:15:33,562 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-22 01:15:33,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:15:33,562 INFO L225 Difference]: With dead ends: 59 [2022-11-22 01:15:33,562 INFO L226 Difference]: Without dead ends: 46 [2022-11-22 01:15:33,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2022-11-22 01:15:33,563 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:15:33,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:15:33,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-22 01:15:33,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 29. [2022-11-22 01:15:33,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 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) [2022-11-22 01:15:33,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2022-11-22 01:15:33,588 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 23 [2022-11-22 01:15:33,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:15:33,589 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2022-11-22 01:15:33,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:33,589 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2022-11-22 01:15:33,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-22 01:15:33,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:15:33,591 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:15:33,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 01:15:33,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-22 01:15:33,799 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:15:33,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:15:33,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1997306399, now seen corresponding path program 1 times [2022-11-22 01:15:33,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:15:33,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231269517] [2022-11-22 01:15:33,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:33,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:15:33,823 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:15:33,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307975361] [2022-11-22 01:15:33,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:33,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:15:33,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:15:33,825 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:15:33,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 01:15:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:15:33,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:15:33,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:15:33,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:15:33,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:15:33,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:15:33,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:15:33,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231269517] [2022-11-22 01:15:33,963 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:15:33,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307975361] [2022-11-22 01:15:33,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307975361] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:15:33,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [474412291] [2022-11-22 01:15:33,966 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 01:15:33,966 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:15:33,966 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:15:33,967 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:15:33,967 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:15:33,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:33,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:34,060 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:15:34,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:15:34,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:34,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:34,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 49 [2022-11-22 01:15:34,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:34,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-11-22 01:15:34,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:34,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:34,440 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-22 01:15:34,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 394 [2022-11-22 01:15:34,589 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 28 treesize of output 24 [2022-11-22 01:15:34,645 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 28 treesize of output 24 [2022-11-22 01:15:34,779 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 28 treesize of output 24 [2022-11-22 01:15:34,829 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 28 treesize of output 24 [2022-11-22 01:15:34,873 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 28 treesize of output 24 [2022-11-22 01:15:34,947 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 24 treesize of output 20 [2022-11-22 01:15:35,063 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-22 01:15:35,063 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 134 treesize of output 122 [2022-11-22 01:15:35,164 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 28 treesize of output 24 [2022-11-22 01:15:35,221 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 28 treesize of output 24 [2022-11-22 01:15:35,284 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 28 treesize of output 24 [2022-11-22 01:15:35,371 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 142 treesize of output 120 [2022-11-22 01:15:35,429 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 28 treesize of output 24 [2022-11-22 01:15:35,500 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 28 treesize of output 24 [2022-11-22 01:15:35,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:35,567 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:35,568 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 49 treesize of output 49 [2022-11-22 01:15:35,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:35,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:35,622 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:15:35,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2022-11-22 01:15:35,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:35,681 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:35,681 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 49 treesize of output 49 [2022-11-22 01:15:35,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:35,761 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:35,762 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 49 treesize of output 49 [2022-11-22 01:15:35,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:35,819 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:35,820 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 49 treesize of output 49 [2022-11-22 01:15:35,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:35,876 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:35,877 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 49 treesize of output 49 [2022-11-22 01:15:35,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:35,968 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:35,969 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 49 treesize of output 49 [2022-11-22 01:15:36,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:36,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:36,029 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:15:36,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-11-22 01:15:36,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:36,081 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:36,082 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 49 treesize of output 49 [2022-11-22 01:15:36,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:36,155 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:15:36,156 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 41 treesize of output 41 [2022-11-22 01:15:36,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:36,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:36,274 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-22 01:15:36,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2022-11-22 01:15:36,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:36,356 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:36,356 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 49 treesize of output 49 [2022-11-22 01:15:36,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:36,490 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:36,491 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 49 treesize of output 49 [2022-11-22 01:15:36,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:36,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:36,605 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:15:36,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 179 [2022-11-22 01:15:36,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:36,672 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:36,673 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 49 treesize of output 49 [2022-11-22 01:15:36,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:36,722 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:36,722 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 49 treesize of output 49 [2022-11-22 01:15:36,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:36,811 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:15:36,812 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 47 treesize of output 47 [2022-11-22 01:15:36,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:36,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:36,982 INFO L321 Elim1Store]: treesize reduction 147, result has 41.0 percent of original size [2022-11-22 01:15:36,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 205 [2022-11-22 01:15:37,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:37,128 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:37,129 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 49 treesize of output 49 [2022-11-22 01:15:37,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:37,179 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:37,180 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 49 treesize of output 49 [2022-11-22 01:15:37,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:37,260 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:15:37,260 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 47 treesize of output 47 [2022-11-22 01:15:37,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:37,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:37,410 INFO L321 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2022-11-22 01:15:37,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 192 [2022-11-22 01:15:37,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:37,504 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:37,505 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 49 treesize of output 49 [2022-11-22 01:15:37,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:37,554 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:37,555 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 49 treesize of output 49 [2022-11-22 01:15:37,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:37,631 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:15:37,632 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 41 treesize of output 41 [2022-11-22 01:15:37,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:37,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:37,752 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-22 01:15:37,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2022-11-22 01:15:37,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:37,828 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:37,828 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 49 treesize of output 49 [2022-11-22 01:15:37,834 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:15:39,023 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1441#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 01:15:39,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:15:39,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:15:39,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-22 01:15:39,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466192018] [2022-11-22 01:15:39,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:15:39,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:15:39,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:15:39,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:15:39,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2022-11-22 01:15:39,026 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:39,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:15:39,310 INFO L93 Difference]: Finished difference Result 95 states and 135 transitions. [2022-11-22 01:15:39,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:15:39,311 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-22 01:15:39,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:15:39,316 INFO L225 Difference]: With dead ends: 95 [2022-11-22 01:15:39,317 INFO L226 Difference]: Without dead ends: 68 [2022-11-22 01:15:39,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2022-11-22 01:15:39,322 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 136 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:15:39,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 14 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:15:39,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-22 01:15:39,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 41. [2022-11-22 01:15:39,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.375) internal successors, (55), 40 states have internal predecessors, (55), 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) [2022-11-22 01:15:39,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2022-11-22 01:15:39,370 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 24 [2022-11-22 01:15:39,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:15:39,370 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2022-11-22 01:15:39,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:39,371 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2022-11-22 01:15:39,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-22 01:15:39,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:15:39,372 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:15:39,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 01:15:39,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-22 01:15:39,578 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:15:39,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:15:39,579 INFO L85 PathProgramCache]: Analyzing trace with hash 321559483, now seen corresponding path program 2 times [2022-11-22 01:15:39,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:15:39,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615486407] [2022-11-22 01:15:39,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:39,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:15:39,590 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:15:39,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1128617779] [2022-11-22 01:15:39,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:15:39,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:15:39,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:15:39,592 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:15:39,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 01:15:39,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 01:15:39,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:15:39,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 01:15:39,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:15:39,771 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-22 01:15:39,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:15:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-22 01:15:39,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:15:39,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615486407] [2022-11-22 01:15:39,829 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:15:39,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128617779] [2022-11-22 01:15:39,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128617779] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:15:39,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [251242973] [2022-11-22 01:15:39,832 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 01:15:39,833 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:15:39,833 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:15:39,833 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:15:39,834 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:15:39,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:39,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:39,935 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:15:39,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:15:39,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:39,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:39,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 49 [2022-11-22 01:15:40,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:40,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2022-11-22 01:15:40,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:40,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:40,336 INFO L321 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-11-22 01:15:40,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 410 treesize of output 396 [2022-11-22 01:15:40,546 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 28 treesize of output 24 [2022-11-22 01:15:40,626 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 28 treesize of output 24 [2022-11-22 01:15:40,736 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 28 treesize of output 24 [2022-11-22 01:15:40,784 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 28 treesize of output 24 [2022-11-22 01:15:40,820 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 28 treesize of output 24 [2022-11-22 01:15:40,881 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 24 treesize of output 20 [2022-11-22 01:15:40,981 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-22 01:15:40,982 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 134 treesize of output 122 [2022-11-22 01:15:41,083 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 28 treesize of output 24 [2022-11-22 01:15:41,154 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 28 treesize of output 24 [2022-11-22 01:15:41,213 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 24 treesize of output 20 [2022-11-22 01:15:41,313 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-22 01:15:41,315 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 134 treesize of output 122 [2022-11-22 01:15:41,421 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 28 treesize of output 24 [2022-11-22 01:15:41,479 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 28 treesize of output 24 [2022-11-22 01:15:41,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:41,552 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:41,552 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 49 treesize of output 49 [2022-11-22 01:15:41,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:41,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:41,610 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:15:41,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2022-11-22 01:15:41,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:41,664 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:41,665 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 49 treesize of output 49 [2022-11-22 01:15:41,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:41,747 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:15:41,747 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 41 treesize of output 41 [2022-11-22 01:15:41,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:41,789 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:41,789 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 49 treesize of output 49 [2022-11-22 01:15:41,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:41,903 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:41,904 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 49 treesize of output 49 [2022-11-22 01:15:41,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:41,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:41,968 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:15:41,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-11-22 01:15:42,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:42,021 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:42,022 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 49 treesize of output 49 [2022-11-22 01:15:42,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:42,086 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:42,087 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 49 treesize of output 49 [2022-11-22 01:15:42,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:42,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:42,146 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:15:42,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-22 01:15:42,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:42,193 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:42,193 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 49 treesize of output 49 [2022-11-22 01:15:42,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:42,325 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:15:42,325 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 47 treesize of output 47 [2022-11-22 01:15:42,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:42,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:42,480 INFO L321 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2022-11-22 01:15:42,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 198 [2022-11-22 01:15:42,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:42,567 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:42,568 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 49 treesize of output 49 [2022-11-22 01:15:42,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:42,618 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:42,619 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 49 treesize of output 49 [2022-11-22 01:15:42,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:42,708 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:15:42,708 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 47 treesize of output 47 [2022-11-22 01:15:42,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:42,754 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:42,754 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 49 treesize of output 49 [2022-11-22 01:15:42,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:42,821 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:42,821 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 49 treesize of output 49 [2022-11-22 01:15:42,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:42,895 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:15:42,895 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 47 treesize of output 47 [2022-11-22 01:15:42,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:42,949 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:42,949 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 49 treesize of output 49 [2022-11-22 01:15:42,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:42,996 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:42,996 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 49 treesize of output 49 [2022-11-22 01:15:43,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:43,064 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:43,064 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 49 treesize of output 49 [2022-11-22 01:15:43,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:43,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:43,108 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:15:43,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-22 01:15:43,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:43,153 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:43,154 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 49 treesize of output 49 [2022-11-22 01:15:43,158 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:15:44,326 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1868#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 01:15:44,327 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:15:44,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:15:44,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-22 01:15:44,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333198873] [2022-11-22 01:15:44,327 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:15:44,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:15:44,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:15:44,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:15:44,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2022-11-22 01:15:44,328 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 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) [2022-11-22 01:15:44,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:15:44,559 INFO L93 Difference]: Finished difference Result 162 states and 220 transitions. [2022-11-22 01:15:44,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:15:44,559 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 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 27 [2022-11-22 01:15:44,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:15:44,562 INFO L225 Difference]: With dead ends: 162 [2022-11-22 01:15:44,562 INFO L226 Difference]: Without dead ends: 131 [2022-11-22 01:15:44,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2022-11-22 01:15:44,566 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 145 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:15:44,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 16 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:15:44,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-22 01:15:44,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 76. [2022-11-22 01:15:44,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.36) internal successors, (102), 75 states have internal predecessors, (102), 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) [2022-11-22 01:15:44,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 102 transitions. [2022-11-22 01:15:44,664 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 102 transitions. Word has length 27 [2022-11-22 01:15:44,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:15:44,664 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 102 transitions. [2022-11-22 01:15:44,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 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) [2022-11-22 01:15:44,665 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 102 transitions. [2022-11-22 01:15:44,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-22 01:15:44,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:15:44,670 INFO L195 NwaCegarLoop]: trace histogram [16, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:15:44,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 01:15:44,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-22 01:15:44,876 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:15:44,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:15:44,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1772377171, now seen corresponding path program 3 times [2022-11-22 01:15:44,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:15:44,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535683480] [2022-11-22 01:15:44,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:44,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:15:44,891 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:15:44,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1393244008] [2022-11-22 01:15:44,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:15:44,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:15:44,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:15:44,893 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:15:44,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 01:15:44,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:15:44,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:15:44,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 01:15:44,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:15:45,092 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 8 proven. 89 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-11-22 01:15:45,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:15:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 8 proven. 89 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-11-22 01:15:45,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:15:45,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535683480] [2022-11-22 01:15:45,172 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:15:45,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393244008] [2022-11-22 01:15:45,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393244008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:15:45,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [954979189] [2022-11-22 01:15:45,175 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 01:15:45,175 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:15:45,175 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:15:45,175 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:15:45,176 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:15:45,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:45,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:45,270 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:15:45,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:15:45,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:45,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:45,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 49 [2022-11-22 01:15:45,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:45,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-11-22 01:15:45,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:45,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:45,604 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-22 01:15:45,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 394 [2022-11-22 01:15:45,714 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 28 treesize of output 24 [2022-11-22 01:15:45,770 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 28 treesize of output 24 [2022-11-22 01:15:45,900 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 24 treesize of output 20 [2022-11-22 01:15:45,988 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 28 treesize of output 24 [2022-11-22 01:15:46,038 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 28 treesize of output 24 [2022-11-22 01:15:46,105 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 28 treesize of output 24 [2022-11-22 01:15:46,180 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 142 treesize of output 120 [2022-11-22 01:15:46,246 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 28 treesize of output 24 [2022-11-22 01:15:46,308 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 28 treesize of output 24 [2022-11-22 01:15:46,370 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 24 treesize of output 20 [2022-11-22 01:15:46,479 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-22 01:15:46,479 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 134 treesize of output 122 [2022-11-22 01:15:46,603 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 28 treesize of output 24 [2022-11-22 01:15:46,671 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 28 treesize of output 24 [2022-11-22 01:15:46,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:46,741 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:15:46,741 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 41 treesize of output 41 [2022-11-22 01:15:46,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:46,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:46,830 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-22 01:15:46,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 185 [2022-11-22 01:15:46,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:46,929 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:46,930 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 49 treesize of output 49 [2022-11-22 01:15:46,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:46,997 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:15:46,998 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 41 treesize of output 41 [2022-11-22 01:15:47,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:47,037 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:47,038 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 49 treesize of output 49 [2022-11-22 01:15:47,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:47,106 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:15:47,106 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 41 treesize of output 41 [2022-11-22 01:15:47,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:47,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:47,191 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-22 01:15:47,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 173 [2022-11-22 01:15:47,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:47,292 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:47,293 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 49 treesize of output 49 [2022-11-22 01:15:47,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:47,350 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:47,351 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 49 treesize of output 49 [2022-11-22 01:15:47,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:47,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:47,397 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:15:47,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-22 01:15:47,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:47,437 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:47,437 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 49 treesize of output 49 [2022-11-22 01:15:47,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:47,560 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:47,561 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 49 treesize of output 49 [2022-11-22 01:15:47,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:47,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:47,652 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:15:47,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 179 [2022-11-22 01:15:47,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:47,714 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:47,714 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 49 treesize of output 49 [2022-11-22 01:15:47,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:47,758 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:47,758 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 49 treesize of output 49 [2022-11-22 01:15:47,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:47,841 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:47,841 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 49 treesize of output 49 [2022-11-22 01:15:47,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:47,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:47,932 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:15:47,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2022-11-22 01:15:47,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:47,999 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:47,999 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 49 treesize of output 49 [2022-11-22 01:15:48,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:48,044 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:48,044 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 49 treesize of output 49 [2022-11-22 01:15:48,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:48,119 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:48,120 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 49 treesize of output 49 [2022-11-22 01:15:48,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:48,176 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:48,177 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 49 treesize of output 49 [2022-11-22 01:15:48,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:48,224 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:48,224 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 49 treesize of output 49 [2022-11-22 01:15:48,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:48,282 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:15:48,282 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 41 treesize of output 41 [2022-11-22 01:15:48,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:48,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:48,363 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-22 01:15:48,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2022-11-22 01:15:48,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:48,459 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:48,459 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 49 treesize of output 49 [2022-11-22 01:15:48,467 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:15:50,046 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2707#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 01:15:50,046 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:15:50,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:15:50,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-11-22 01:15:50,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505449611] [2022-11-22 01:15:50,046 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:15:50,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 01:15:50,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:15:50,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 01:15:50,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-11-22 01:15:50,048 INFO L87 Difference]: Start difference. First operand 76 states and 102 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2022-11-22 01:15:50,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:15:50,458 INFO L93 Difference]: Finished difference Result 260 states and 355 transitions. [2022-11-22 01:15:50,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 01:15:50,459 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 63 [2022-11-22 01:15:50,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:15:50,460 INFO L225 Difference]: With dead ends: 260 [2022-11-22 01:15:50,460 INFO L226 Difference]: Without dead ends: 178 [2022-11-22 01:15:50,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 143 SyntacticMatches, 25 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2022-11-22 01:15:50,462 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 104 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:15:50,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 51 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:15:50,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-11-22 01:15:50,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 100. [2022-11-22 01:15:50,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.3131313131313131) internal successors, (130), 99 states have internal predecessors, (130), 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) [2022-11-22 01:15:50,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 130 transitions. [2022-11-22 01:15:50,501 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 130 transitions. Word has length 63 [2022-11-22 01:15:50,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:15:50,502 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 130 transitions. [2022-11-22 01:15:50,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2022-11-22 01:15:50,502 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 130 transitions. [2022-11-22 01:15:50,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-22 01:15:50,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:15:50,504 INFO L195 NwaCegarLoop]: trace histogram [32, 8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:15:50,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 01:15:50,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:15:50,709 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:15:50,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:15:50,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1481494967, now seen corresponding path program 4 times [2022-11-22 01:15:50,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:15:50,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536613135] [2022-11-22 01:15:50,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:50,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:15:50,733 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:15:50,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893867355] [2022-11-22 01:15:50,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:15:50,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:15:50,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:15:50,735 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:15:50,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 01:15:50,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:15:50,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 01:15:50,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:15:50,994 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 190 proven. 10 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2022-11-22 01:15:50,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:15:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 190 proven. 10 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2022-11-22 01:15:51,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:15:51,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536613135] [2022-11-22 01:15:51,087 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:15:51,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893867355] [2022-11-22 01:15:51,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893867355] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:15:51,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1334418316] [2022-11-22 01:15:51,089 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 01:15:51,090 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:15:51,090 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:15:51,090 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:15:51,090 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:15:51,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:51,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:51,184 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:15:51,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:15:51,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:51,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:51,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 49 [2022-11-22 01:15:51,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:51,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2022-11-22 01:15:51,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:51,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:51,557 INFO L321 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-11-22 01:15:51,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 410 treesize of output 396 [2022-11-22 01:15:51,770 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 28 treesize of output 24 [2022-11-22 01:15:51,835 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 28 treesize of output 24 [2022-11-22 01:15:51,943 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 28 treesize of output 24 [2022-11-22 01:15:52,001 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 28 treesize of output 24 [2022-11-22 01:15:52,039 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 28 treesize of output 24 [2022-11-22 01:15:52,098 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 24 treesize of output 20 [2022-11-22 01:15:52,194 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-22 01:15:52,194 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 134 treesize of output 122 [2022-11-22 01:15:52,288 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 28 treesize of output 24 [2022-11-22 01:15:52,341 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 28 treesize of output 24 [2022-11-22 01:15:52,396 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 28 treesize of output 24 [2022-11-22 01:15:52,471 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 142 treesize of output 120 [2022-11-22 01:15:52,536 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 28 treesize of output 24 [2022-11-22 01:15:52,585 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 28 treesize of output 24 [2022-11-22 01:15:52,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:52,656 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:15:52,656 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 41 treesize of output 41 [2022-11-22 01:15:52,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:52,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:52,753 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-22 01:15:52,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 185 [2022-11-22 01:15:52,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:52,844 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:52,846 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 49 treesize of output 49 [2022-11-22 01:15:52,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:52,939 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:52,940 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 49 treesize of output 49 [2022-11-22 01:15:52,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:52,997 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:52,997 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 49 treesize of output 49 [2022-11-22 01:15:53,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:53,046 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:53,047 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 49 treesize of output 49 [2022-11-22 01:15:53,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:53,145 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:53,145 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 49 treesize of output 49 [2022-11-22 01:15:53,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:53,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:53,190 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:15:53,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-11-22 01:15:53,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:53,238 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:53,238 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 49 treesize of output 49 [2022-11-22 01:15:53,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:53,297 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:53,298 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 49 treesize of output 49 [2022-11-22 01:15:53,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:53,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:53,352 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:15:53,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-22 01:15:53,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:53,396 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:53,396 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 49 treesize of output 49 [2022-11-22 01:15:53,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:53,528 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:15:53,528 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 47 treesize of output 47 [2022-11-22 01:15:53,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:53,576 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:53,577 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 49 treesize of output 49 [2022-11-22 01:15:53,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:53,622 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:53,622 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 49 treesize of output 49 [2022-11-22 01:15:53,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:53,695 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:15:53,695 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 47 treesize of output 47 [2022-11-22 01:15:53,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:53,746 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:53,746 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 49 treesize of output 49 [2022-11-22 01:15:53,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:53,792 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:53,792 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 49 treesize of output 49 [2022-11-22 01:15:53,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:53,869 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:53,869 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 49 treesize of output 49 [2022-11-22 01:15:53,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:53,917 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:53,917 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 49 treesize of output 49 [2022-11-22 01:15:53,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:53,963 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:53,964 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 49 treesize of output 49 [2022-11-22 01:15:54,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:54,029 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:15:54,029 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 41 treesize of output 41 [2022-11-22 01:15:54,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:54,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:54,135 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-22 01:15:54,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2022-11-22 01:15:54,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:54,215 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:54,215 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 49 treesize of output 49 [2022-11-22 01:15:54,223 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:15:56,114 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3947#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 01:15:56,114 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:15:56,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:15:56,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-22 01:15:56,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987267887] [2022-11-22 01:15:56,115 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:15:56,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 01:15:56,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:15:56,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 01:15:56,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2022-11-22 01:15:56,117 INFO L87 Difference]: Start difference. First operand 100 states and 130 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:56,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:15:56,600 INFO L93 Difference]: Finished difference Result 327 states and 467 transitions. [2022-11-22 01:15:56,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 01:15:56,601 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2022-11-22 01:15:56,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:15:56,602 INFO L225 Difference]: With dead ends: 327 [2022-11-22 01:15:56,602 INFO L226 Difference]: Without dead ends: 235 [2022-11-22 01:15:56,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 195 SyntacticMatches, 42 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2022-11-22 01:15:56,607 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 214 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:15:56,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 32 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:15:56,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-11-22 01:15:56,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 166. [2022-11-22 01:15:56,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.2242424242424241) internal successors, (202), 165 states have internal predecessors, (202), 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) [2022-11-22 01:15:56,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 202 transitions. [2022-11-22 01:15:56,718 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 202 transitions. Word has length 87 [2022-11-22 01:15:56,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:15:56,720 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 202 transitions. [2022-11-22 01:15:56,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:15:56,720 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 202 transitions. [2022-11-22 01:15:56,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-22 01:15:56,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:15:56,729 INFO L195 NwaCegarLoop]: trace histogram [80, 8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:15:56,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 01:15:56,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 01:15:56,935 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:15:56,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:15:56,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1651562313, now seen corresponding path program 5 times [2022-11-22 01:15:56,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:15:56,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310868906] [2022-11-22 01:15:56,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:56,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:15:56,973 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:15:56,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443093709] [2022-11-22 01:15:56,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:15:56,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:15:56,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:15:56,975 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:15:56,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 01:15:57,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 01:15:57,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:15:57,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:15:57,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:15:57,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3955 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3954 trivial. 0 not checked. [2022-11-22 01:15:57,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:15:57,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3955 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3954 trivial. 0 not checked. [2022-11-22 01:15:57,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:15:57,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310868906] [2022-11-22 01:15:57,449 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:15:57,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443093709] [2022-11-22 01:15:57,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443093709] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:15:57,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1467573310] [2022-11-22 01:15:57,451 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 01:15:57,451 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:15:57,451 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:15:57,451 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:15:57,452 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:15:57,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:57,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:57,535 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:15:57,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:15:57,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:57,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:57,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 49 [2022-11-22 01:15:57,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:57,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-11-22 01:15:57,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:57,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:15:57,850 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-22 01:15:57,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 394 [2022-11-22 01:15:57,951 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 28 treesize of output 24 [2022-11-22 01:15:58,000 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 28 treesize of output 24 [2022-11-22 01:15:58,107 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 28 treesize of output 24 [2022-11-22 01:15:58,157 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 28 treesize of output 24 [2022-11-22 01:15:58,195 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 28 treesize of output 24 [2022-11-22 01:15:58,258 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 24 treesize of output 20 [2022-11-22 01:15:58,357 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-22 01:15:58,358 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 134 treesize of output 122 [2022-11-22 01:15:58,458 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 28 treesize of output 24 [2022-11-22 01:15:58,510 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 28 treesize of output 24 [2022-11-22 01:15:58,571 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 24 treesize of output 20 [2022-11-22 01:15:58,678 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-22 01:15:58,679 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 134 treesize of output 122 [2022-11-22 01:15:58,779 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 28 treesize of output 24 [2022-11-22 01:15:58,822 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 28 treesize of output 24 [2022-11-22 01:15:58,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:58,886 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:58,886 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 49 treesize of output 49 [2022-11-22 01:15:58,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:58,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:58,944 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:15:58,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2022-11-22 01:15:58,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:58,998 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:58,999 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 49 treesize of output 49 [2022-11-22 01:15:59,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:59,074 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:15:59,074 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 41 treesize of output 41 [2022-11-22 01:15:59,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:59,108 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:59,108 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 49 treesize of output 49 [2022-11-22 01:15:59,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:59,180 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:59,181 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 49 treesize of output 49 [2022-11-22 01:15:59,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:59,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:59,227 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:15:59,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-11-22 01:15:59,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:59,280 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:59,280 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 49 treesize of output 49 [2022-11-22 01:15:59,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:59,333 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:15:59,333 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 41 treesize of output 41 [2022-11-22 01:15:59,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:59,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:59,428 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-22 01:15:59,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-22 01:15:59,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:59,493 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:59,494 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 49 treesize of output 49 [2022-11-22 01:15:59,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:59,624 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:15:59,625 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 47 treesize of output 47 [2022-11-22 01:15:59,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:59,667 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:59,667 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 49 treesize of output 49 [2022-11-22 01:15:59,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:59,714 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:59,714 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 49 treesize of output 49 [2022-11-22 01:15:59,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:59,791 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:59,791 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 49 treesize of output 49 [2022-11-22 01:15:59,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:59,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:59,886 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:15:59,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2022-11-22 01:15:59,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:59,949 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:15:59,949 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 49 treesize of output 49 [2022-11-22 01:15:59,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:15:59,999 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:00,001 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 49 treesize of output 49 [2022-11-22 01:16:00,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:00,066 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:00,066 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 49 treesize of output 49 [2022-11-22 01:16:00,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:00,114 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:00,114 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 49 treesize of output 49 [2022-11-22 01:16:00,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:00,161 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:00,162 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 49 treesize of output 49 [2022-11-22 01:16:00,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:00,226 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:16:00,227 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 41 treesize of output 41 [2022-11-22 01:16:00,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:00,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:00,328 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-22 01:16:00,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-22 01:16:00,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:00,390 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:00,391 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 49 treesize of output 49 [2022-11-22 01:16:00,396 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:16:02,951 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5715#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 01:16:02,951 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:16:02,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:16:02,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-22 01:16:02,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629236523] [2022-11-22 01:16:02,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:16:02,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:16:02,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:16:02,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:16:02,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2022-11-22 01:16:02,953 INFO L87 Difference]: Start difference. First operand 166 states and 202 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:16:03,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:16:03,270 INFO L93 Difference]: Finished difference Result 398 states and 510 transitions. [2022-11-22 01:16:03,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:16:03,271 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2022-11-22 01:16:03,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:16:03,273 INFO L225 Difference]: With dead ends: 398 [2022-11-22 01:16:03,273 INFO L226 Difference]: Without dead ends: 344 [2022-11-22 01:16:03,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 297 SyntacticMatches, 90 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2022-11-22 01:16:03,274 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 218 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:16:03,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 31 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:16:03,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-11-22 01:16:03,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 175. [2022-11-22 01:16:03,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.2471264367816093) internal successors, (217), 174 states have internal predecessors, (217), 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) [2022-11-22 01:16:03,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 217 transitions. [2022-11-22 01:16:03,349 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 217 transitions. Word has length 135 [2022-11-22 01:16:03,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:16:03,350 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 217 transitions. [2022-11-22 01:16:03,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:16:03,350 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 217 transitions. [2022-11-22 01:16:03,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-22 01:16:03,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:16:03,352 INFO L195 NwaCegarLoop]: trace histogram [80, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:16:03,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 01:16:03,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 01:16:03,558 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:16:03,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:16:03,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1487790265, now seen corresponding path program 6 times [2022-11-22 01:16:03,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:16:03,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346033329] [2022-11-22 01:16:03,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:16:03,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:16:03,596 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:16:03,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [593047847] [2022-11-22 01:16:03,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:16:03,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:16:03,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:16:03,598 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:16:03,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 01:16:03,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:16:03,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:16:03,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:16:03,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:16:03,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3973 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 3941 trivial. 0 not checked. [2022-11-22 01:16:03,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:16:03,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3973 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 3941 trivial. 0 not checked. [2022-11-22 01:16:03,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:16:03,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346033329] [2022-11-22 01:16:03,830 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:16:03,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593047847] [2022-11-22 01:16:03,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593047847] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:16:03,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1702646971] [2022-11-22 01:16:03,832 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 01:16:03,832 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:16:03,833 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:16:03,833 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:16:03,833 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:16:03,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:03,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:03,909 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-11-22 01:16:03,910 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 3 case distinctions, treesize of input 39 treesize of output 63 [2022-11-22 01:16:03,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:03,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:03,998 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:16:03,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:16:04,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:04,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2022-11-22 01:16:04,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:04,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:04,319 INFO L321 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-11-22 01:16:04,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 410 treesize of output 396 [2022-11-22 01:16:04,507 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 28 treesize of output 24 [2022-11-22 01:16:04,567 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 28 treesize of output 24 [2022-11-22 01:16:04,668 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 24 treesize of output 20 [2022-11-22 01:16:04,749 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 28 treesize of output 24 [2022-11-22 01:16:04,797 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 28 treesize of output 24 [2022-11-22 01:16:04,870 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 28 treesize of output 24 [2022-11-22 01:16:04,947 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 142 treesize of output 120 [2022-11-22 01:16:05,001 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 28 treesize of output 24 [2022-11-22 01:16:05,055 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 28 treesize of output 24 [2022-11-22 01:16:05,116 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 28 treesize of output 24 [2022-11-22 01:16:05,198 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 142 treesize of output 120 [2022-11-22 01:16:05,252 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 28 treesize of output 24 [2022-11-22 01:16:05,296 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 28 treesize of output 24 [2022-11-22 01:16:05,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:05,357 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:16:05,358 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 41 treesize of output 41 [2022-11-22 01:16:05,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:05,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:05,452 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-22 01:16:05,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 175 [2022-11-22 01:16:05,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:05,537 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:05,537 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 49 treesize of output 49 [2022-11-22 01:16:05,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:05,608 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:05,608 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 49 treesize of output 49 [2022-11-22 01:16:05,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:05,658 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:05,658 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 49 treesize of output 49 [2022-11-22 01:16:05,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:05,711 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:05,712 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 49 treesize of output 49 [2022-11-22 01:16:05,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:05,797 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:16:05,797 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 41 treesize of output 41 [2022-11-22 01:16:05,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:05,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:05,879 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-22 01:16:05,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 163 [2022-11-22 01:16:05,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:05,955 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:05,956 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 49 treesize of output 49 [2022-11-22 01:16:06,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:06,024 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:16:06,024 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 41 treesize of output 41 [2022-11-22 01:16:06,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:06,077 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:06,077 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 49 treesize of output 49 [2022-11-22 01:16:06,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:06,182 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:16:06,182 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 47 treesize of output 47 [2022-11-22 01:16:06,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:06,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:06,320 INFO L321 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2022-11-22 01:16:06,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 198 [2022-11-22 01:16:06,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:06,407 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:06,407 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 49 treesize of output 49 [2022-11-22 01:16:06,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:06,455 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:06,455 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 49 treesize of output 49 [2022-11-22 01:16:06,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:06,533 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:06,533 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 49 treesize of output 49 [2022-11-22 01:16:06,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:06,588 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:06,589 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 49 treesize of output 49 [2022-11-22 01:16:06,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:06,638 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:06,639 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 49 treesize of output 49 [2022-11-22 01:16:06,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:06,713 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:06,714 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 49 treesize of output 49 [2022-11-22 01:16:06,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:06,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:06,815 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:16:06,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2022-11-22 01:16:06,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:06,880 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:06,880 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 49 treesize of output 49 [2022-11-22 01:16:06,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:06,934 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:06,935 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 49 treesize of output 49 [2022-11-22 01:16:06,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:07,008 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:07,009 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 49 treesize of output 49 [2022-11-22 01:16:07,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:07,050 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:07,050 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 49 treesize of output 49 [2022-11-22 01:16:07,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:07,093 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:07,094 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 49 treesize of output 49 [2022-11-22 01:16:07,113 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:16:09,547 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7634#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 01:16:09,547 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:16:09,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:16:09,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-11-22 01:16:09,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188770347] [2022-11-22 01:16:09,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:16:09,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:16:09,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:16:09,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:16:09,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:16:09,548 INFO L87 Difference]: Start difference. First operand 175 states and 217 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 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) [2022-11-22 01:16:09,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:16:09,817 INFO L93 Difference]: Finished difference Result 293 states and 386 transitions. [2022-11-22 01:16:09,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:16:09,817 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2022-11-22 01:16:09,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:16:09,819 INFO L225 Difference]: With dead ends: 293 [2022-11-22 01:16:09,819 INFO L226 Difference]: Without dead ends: 234 [2022-11-22 01:16:09,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 307 SyntacticMatches, 103 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-22 01:16:09,821 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:16:09,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 21 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:16:09,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-22 01:16:09,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 181. [2022-11-22 01:16:09,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.2555555555555555) internal successors, (226), 180 states have internal predecessors, (226), 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) [2022-11-22 01:16:09,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 226 transitions. [2022-11-22 01:16:09,902 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 226 transitions. Word has length 141 [2022-11-22 01:16:09,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:16:09,903 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 226 transitions. [2022-11-22 01:16:09,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 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) [2022-11-22 01:16:09,904 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 226 transitions. [2022-11-22 01:16:09,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-22 01:16:09,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:16:09,905 INFO L195 NwaCegarLoop]: trace histogram [80, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:16:09,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 01:16:10,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-22 01:16:10,110 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:16:10,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:16:10,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1632527579, now seen corresponding path program 7 times [2022-11-22 01:16:10,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:16:10,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954516087] [2022-11-22 01:16:10,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:16:10,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:16:10,154 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:16:10,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1203090600] [2022-11-22 01:16:10,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:16:10,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:16:10,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:16:10,156 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:16:10,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 01:16:10,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:16:10,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 1015 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 01:16:10,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:16:10,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3984 backedges. 862 proven. 55 refuted. 0 times theorem prover too weak. 3067 trivial. 0 not checked. [2022-11-22 01:16:10,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:16:10,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3984 backedges. 862 proven. 55 refuted. 0 times theorem prover too weak. 3067 trivial. 0 not checked. [2022-11-22 01:16:10,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:16:10,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954516087] [2022-11-22 01:16:10,895 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:16:10,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203090600] [2022-11-22 01:16:10,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203090600] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:16:10,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [538816055] [2022-11-22 01:16:10,897 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 01:16:10,897 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:16:10,898 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:16:10,898 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:16:10,898 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:16:10,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:10,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:10,978 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-11-22 01:16:10,979 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 3 case distinctions, treesize of input 39 treesize of output 63 [2022-11-22 01:16:11,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:11,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:11,074 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:16:11,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:16:11,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:11,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-11-22 01:16:11,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:11,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:11,356 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-22 01:16:11,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 394 [2022-11-22 01:16:11,461 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 28 treesize of output 24 [2022-11-22 01:16:11,519 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 28 treesize of output 24 [2022-11-22 01:16:11,611 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 28 treesize of output 24 [2022-11-22 01:16:11,664 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 28 treesize of output 24 [2022-11-22 01:16:11,699 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 28 treesize of output 24 [2022-11-22 01:16:11,752 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 24 treesize of output 20 [2022-11-22 01:16:11,834 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-22 01:16:11,835 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 134 treesize of output 122 [2022-11-22 01:16:11,927 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 28 treesize of output 24 [2022-11-22 01:16:11,984 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 28 treesize of output 24 [2022-11-22 01:16:12,039 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 24 treesize of output 20 [2022-11-22 01:16:12,138 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-22 01:16:12,138 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 134 treesize of output 122 [2022-11-22 01:16:12,232 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 28 treesize of output 24 [2022-11-22 01:16:12,284 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 28 treesize of output 24 [2022-11-22 01:16:12,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:12,348 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:12,349 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 49 treesize of output 49 [2022-11-22 01:16:12,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:12,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:12,402 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:16:12,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2022-11-22 01:16:12,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:12,451 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:12,451 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 49 treesize of output 49 [2022-11-22 01:16:12,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:12,523 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:16:12,523 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 41 treesize of output 41 [2022-11-22 01:16:12,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:12,574 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:12,574 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 49 treesize of output 49 [2022-11-22 01:16:12,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:12,645 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:12,645 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 49 treesize of output 49 [2022-11-22 01:16:12,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:12,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:12,690 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:16:12,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-11-22 01:16:12,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:12,732 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:12,732 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 49 treesize of output 49 [2022-11-22 01:16:12,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:12,781 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:12,782 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 49 treesize of output 49 [2022-11-22 01:16:12,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:12,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:12,840 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:16:12,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-22 01:16:12,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:12,887 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:12,887 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 49 treesize of output 49 [2022-11-22 01:16:13,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:13,014 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:16:13,014 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 47 treesize of output 47 [2022-11-22 01:16:13,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:13,056 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:13,057 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 49 treesize of output 49 [2022-11-22 01:16:13,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:13,105 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:13,106 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 49 treesize of output 49 [2022-11-22 01:16:13,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:13,181 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:16:13,181 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 47 treesize of output 47 [2022-11-22 01:16:13,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:13,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:13,311 INFO L321 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2022-11-22 01:16:13,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 192 [2022-11-22 01:16:13,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:13,391 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:13,391 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 49 treesize of output 49 [2022-11-22 01:16:13,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:13,440 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:13,440 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 49 treesize of output 49 [2022-11-22 01:16:13,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:13,538 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:13,538 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 49 treesize of output 49 [2022-11-22 01:16:13,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:13,591 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:13,591 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 49 treesize of output 49 [2022-11-22 01:16:13,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:13,644 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:13,645 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 49 treesize of output 49 [2022-11-22 01:16:13,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:13,715 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:13,716 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 49 treesize of output 49 [2022-11-22 01:16:13,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:13,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:13,765 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:16:13,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-22 01:16:13,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:13,814 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:13,815 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 49 treesize of output 49 [2022-11-22 01:16:13,819 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:16:17,380 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9426#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 01:16:17,380 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:16:17,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:16:17,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-11-22 01:16:17,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915844059] [2022-11-22 01:16:17,381 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:16:17,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-22 01:16:17,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:16:17,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-22 01:16:17,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=823, Unknown=0, NotChecked=0, Total=1260 [2022-11-22 01:16:17,383 INFO L87 Difference]: Start difference. First operand 181 states and 226 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 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) [2022-11-22 01:16:18,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:16:18,719 INFO L93 Difference]: Finished difference Result 831 states and 1217 transitions. [2022-11-22 01:16:18,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-22 01:16:18,720 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 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 143 [2022-11-22 01:16:18,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:16:18,723 INFO L225 Difference]: With dead ends: 831 [2022-11-22 01:16:18,723 INFO L226 Difference]: Without dead ends: 664 [2022-11-22 01:16:18,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 303 SyntacticMatches, 90 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3855 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=756, Invalid=1406, Unknown=0, NotChecked=0, Total=2162 [2022-11-22 01:16:18,725 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 961 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 431 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:16:18,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [961 Valid, 68 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [431 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 01:16:18,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-11-22 01:16:18,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 313. [2022-11-22 01:16:18,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 1.185897435897436) internal successors, (370), 312 states have internal predecessors, (370), 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) [2022-11-22 01:16:18,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 370 transitions. [2022-11-22 01:16:18,862 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 370 transitions. Word has length 143 [2022-11-22 01:16:18,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:16:18,862 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 370 transitions. [2022-11-22 01:16:18,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 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) [2022-11-22 01:16:18,863 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 370 transitions. [2022-11-22 01:16:18,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-11-22 01:16:18,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:16:18,865 INFO L195 NwaCegarLoop]: trace histogram [176, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:16:18,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-22 01:16:19,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:16:19,073 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:16:19,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:16:19,073 INFO L85 PathProgramCache]: Analyzing trace with hash -398489307, now seen corresponding path program 8 times [2022-11-22 01:16:19,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:16:19,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635961180] [2022-11-22 01:16:19,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:16:19,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:16:19,151 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:16:19,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1336875845] [2022-11-22 01:16:19,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:16:19,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:16:19,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:16:19,153 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:16:19,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 01:16:19,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 01:16:19,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:16:19,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:16:19,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:16:19,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16992 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16984 trivial. 0 not checked. [2022-11-22 01:16:19,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:16:19,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:16:19,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635961180] [2022-11-22 01:16:19,724 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:16:19,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336875845] [2022-11-22 01:16:19,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336875845] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:16:19,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:16:19,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:16:19,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97422058] [2022-11-22 01:16:19,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:16:19,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:16:19,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:16:19,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:16:19,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:16:19,727 INFO L87 Difference]: Start difference. First operand 313 states and 370 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:16:19,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:16:19,967 INFO L93 Difference]: Finished difference Result 493 states and 619 transitions. [2022-11-22 01:16:19,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:16:19,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2022-11-22 01:16:19,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:16:19,970 INFO L225 Difference]: With dead ends: 493 [2022-11-22 01:16:19,970 INFO L226 Difference]: Without dead ends: 390 [2022-11-22 01:16:19,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:16:19,971 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 34 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:16:19,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 11 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:16:19,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-11-22 01:16:20,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 316. [2022-11-22 01:16:20,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.1841269841269841) internal successors, (373), 315 states have internal predecessors, (373), 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) [2022-11-22 01:16:20,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 373 transitions. [2022-11-22 01:16:20,101 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 373 transitions. Word has length 239 [2022-11-22 01:16:20,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:16:20,102 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 373 transitions. [2022-11-22 01:16:20,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:16:20,102 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 373 transitions. [2022-11-22 01:16:20,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-11-22 01:16:20,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:16:20,105 INFO L195 NwaCegarLoop]: trace histogram [176, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:16:20,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-22 01:16:20,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:16:20,311 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:16:20,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:16:20,311 INFO L85 PathProgramCache]: Analyzing trace with hash -442724687, now seen corresponding path program 9 times [2022-11-22 01:16:20,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:16:20,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031971134] [2022-11-22 01:16:20,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:16:20,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:16:20,382 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:16:20,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1254305850] [2022-11-22 01:16:20,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:16:20,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:16:20,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:16:20,384 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:16:20,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-22 01:16:20,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:16:20,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:16:20,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 01:16:20,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:16:20,828 INFO L134 CoverageAnalysis]: Checked inductivity of 17019 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 16992 trivial. 0 not checked. [2022-11-22 01:16:20,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:16:20,886 INFO L134 CoverageAnalysis]: Checked inductivity of 17019 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 16992 trivial. 0 not checked. [2022-11-22 01:16:20,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:16:20,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031971134] [2022-11-22 01:16:20,887 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:16:20,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254305850] [2022-11-22 01:16:20,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254305850] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:16:20,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2002817507] [2022-11-22 01:16:20,892 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 01:16:20,892 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:16:20,893 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:16:20,894 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:16:20,894 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:16:20,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:20,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:20,981 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:16:20,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:16:20,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:20,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:20,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 49 [2022-11-22 01:16:21,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:21,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-11-22 01:16:21,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:21,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:21,302 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-22 01:16:21,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 394 [2022-11-22 01:16:21,410 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 28 treesize of output 24 [2022-11-22 01:16:21,461 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 28 treesize of output 24 [2022-11-22 01:16:21,564 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 24 treesize of output 20 [2022-11-22 01:16:21,644 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 28 treesize of output 24 [2022-11-22 01:16:21,689 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 28 treesize of output 24 [2022-11-22 01:16:21,752 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 28 treesize of output 24 [2022-11-22 01:16:21,822 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 142 treesize of output 120 [2022-11-22 01:16:21,897 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 28 treesize of output 24 [2022-11-22 01:16:21,948 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 28 treesize of output 24 [2022-11-22 01:16:22,005 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 24 treesize of output 20 [2022-11-22 01:16:22,093 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-22 01:16:22,094 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 134 treesize of output 122 [2022-11-22 01:16:22,196 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 28 treesize of output 24 [2022-11-22 01:16:22,242 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 28 treesize of output 24 [2022-11-22 01:16:22,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:22,315 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:16:22,316 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 41 treesize of output 41 [2022-11-22 01:16:22,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:22,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:22,418 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-22 01:16:22,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 185 [2022-11-22 01:16:22,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:22,499 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:22,500 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 49 treesize of output 49 [2022-11-22 01:16:22,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:22,566 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:16:22,566 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 41 treesize of output 41 [2022-11-22 01:16:22,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:22,608 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:22,609 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 49 treesize of output 49 [2022-11-22 01:16:22,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:22,690 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:22,691 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 49 treesize of output 49 [2022-11-22 01:16:22,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:22,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:22,741 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:16:22,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-11-22 01:16:22,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:22,804 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:22,804 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 49 treesize of output 49 [2022-11-22 01:16:22,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:22,852 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:22,853 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 49 treesize of output 49 [2022-11-22 01:16:22,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:22,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:22,897 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:16:22,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-22 01:16:22,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:22,940 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:22,940 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 49 treesize of output 49 [2022-11-22 01:16:23,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:23,040 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:23,040 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 49 treesize of output 49 [2022-11-22 01:16:23,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:23,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:23,127 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:16:23,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 179 [2022-11-22 01:16:23,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:23,190 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:23,190 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 49 treesize of output 49 [2022-11-22 01:16:23,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:23,247 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:23,247 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 49 treesize of output 49 [2022-11-22 01:16:23,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:23,334 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:23,335 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 49 treesize of output 49 [2022-11-22 01:16:23,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:23,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:23,447 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:16:23,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2022-11-22 01:16:23,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:23,517 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:23,518 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 49 treesize of output 49 [2022-11-22 01:16:23,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:23,565 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:23,566 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 49 treesize of output 49 [2022-11-22 01:16:23,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:23,645 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:16:23,645 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 47 treesize of output 47 [2022-11-22 01:16:23,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:23,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:23,844 INFO L321 Elim1Store]: treesize reduction 147, result has 41.0 percent of original size [2022-11-22 01:16:23,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 205 [2022-11-22 01:16:23,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:23,963 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:23,963 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 49 treesize of output 49 [2022-11-22 01:16:23,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:24,010 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:24,010 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 49 treesize of output 49 [2022-11-22 01:16:24,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:24,074 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:24,074 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 49 treesize of output 49 [2022-11-22 01:16:24,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:24,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:24,118 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:16:24,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-22 01:16:24,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:24,163 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:24,164 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 49 treesize of output 49 [2022-11-22 01:16:24,169 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:16:29,396 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15355#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 01:16:29,396 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:16:29,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:16:29,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-11-22 01:16:29,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084305413] [2022-11-22 01:16:29,397 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:16:29,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 01:16:29,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:16:29,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 01:16:29,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2022-11-22 01:16:29,399 INFO L87 Difference]: Start difference. First operand 316 states and 373 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 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) [2022-11-22 01:16:29,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:16:29,836 INFO L93 Difference]: Finished difference Result 493 states and 641 transitions. [2022-11-22 01:16:29,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 01:16:29,837 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 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 245 [2022-11-22 01:16:29,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:16:29,839 INFO L225 Difference]: With dead ends: 493 [2022-11-22 01:16:29,839 INFO L226 Difference]: Without dead ends: 358 [2022-11-22 01:16:29,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 741 GetRequests, 527 SyntacticMatches, 187 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=197, Invalid=615, Unknown=0, NotChecked=0, Total=812 [2022-11-22 01:16:29,840 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 55 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:16:29,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 30 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:16:29,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-11-22 01:16:29,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 326. [2022-11-22 01:16:29,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.1907692307692308) internal successors, (387), 325 states have internal predecessors, (387), 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) [2022-11-22 01:16:29,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 387 transitions. [2022-11-22 01:16:29,973 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 387 transitions. Word has length 245 [2022-11-22 01:16:29,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:16:29,974 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 387 transitions. [2022-11-22 01:16:29,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 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) [2022-11-22 01:16:29,974 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 387 transitions. [2022-11-22 01:16:29,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-11-22 01:16:29,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:16:29,976 INFO L195 NwaCegarLoop]: trace histogram [176, 8, 8, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:16:29,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-22 01:16:30,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 01:16:30,183 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:16:30,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:16:30,183 INFO L85 PathProgramCache]: Analyzing trace with hash -706577498, now seen corresponding path program 10 times [2022-11-22 01:16:30,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:16:30,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117555126] [2022-11-22 01:16:30,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:16:30,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:16:30,247 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:16:30,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1249864096] [2022-11-22 01:16:30,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:16:30,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:16:30,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:16:30,249 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:16:30,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-22 01:16:30,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:16:30,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 1932 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 01:16:30,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:16:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 17054 backedges. 3718 proven. 253 refuted. 0 times theorem prover too weak. 13083 trivial. 0 not checked. [2022-11-22 01:16:31,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:16:32,008 INFO L134 CoverageAnalysis]: Checked inductivity of 17054 backedges. 3718 proven. 253 refuted. 0 times theorem prover too weak. 13083 trivial. 0 not checked. [2022-11-22 01:16:32,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:16:32,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117555126] [2022-11-22 01:16:32,009 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:16:32,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249864096] [2022-11-22 01:16:32,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249864096] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:16:32,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1283060995] [2022-11-22 01:16:32,011 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 01:16:32,011 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:16:32,011 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:16:32,012 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:16:32,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:16:32,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:32,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:32,089 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-11-22 01:16:32,089 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 3 case distinctions, treesize of input 39 treesize of output 63 [2022-11-22 01:16:32,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:32,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:32,180 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:16:32,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:16:32,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:32,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-11-22 01:16:32,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:32,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:32,429 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-22 01:16:32,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 394 [2022-11-22 01:16:32,531 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 28 treesize of output 24 [2022-11-22 01:16:32,585 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 28 treesize of output 24 [2022-11-22 01:16:32,680 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 28 treesize of output 24 [2022-11-22 01:16:32,746 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 28 treesize of output 24 [2022-11-22 01:16:32,780 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 28 treesize of output 24 [2022-11-22 01:16:32,831 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 24 treesize of output 20 [2022-11-22 01:16:32,908 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-22 01:16:32,909 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 134 treesize of output 122 [2022-11-22 01:16:32,999 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 28 treesize of output 24 [2022-11-22 01:16:33,055 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 28 treesize of output 24 [2022-11-22 01:16:33,110 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 24 treesize of output 20 [2022-11-22 01:16:33,193 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-22 01:16:33,193 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 134 treesize of output 122 [2022-11-22 01:16:33,283 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 28 treesize of output 24 [2022-11-22 01:16:33,320 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 28 treesize of output 24 [2022-11-22 01:16:33,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:33,376 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:33,376 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 49 treesize of output 49 [2022-11-22 01:16:33,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:33,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:33,422 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:16:33,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2022-11-22 01:16:33,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:33,470 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:33,470 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 49 treesize of output 49 [2022-11-22 01:16:33,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:33,536 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:16:33,536 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 41 treesize of output 41 [2022-11-22 01:16:33,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:33,573 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:33,574 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 49 treesize of output 49 [2022-11-22 01:16:33,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:33,642 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:33,642 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 49 treesize of output 49 [2022-11-22 01:16:33,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:33,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:33,707 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:16:33,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-11-22 01:16:33,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:33,750 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:33,751 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 49 treesize of output 49 [2022-11-22 01:16:33,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:33,800 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:16:33,800 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 41 treesize of output 41 [2022-11-22 01:16:33,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:33,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:33,880 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-22 01:16:33,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-22 01:16:33,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:33,932 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:33,933 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 49 treesize of output 49 [2022-11-22 01:16:34,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:34,060 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:16:34,061 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 47 treesize of output 47 [2022-11-22 01:16:34,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:34,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:34,213 INFO L321 Elim1Store]: treesize reduction 147, result has 41.0 percent of original size [2022-11-22 01:16:34,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 211 [2022-11-22 01:16:34,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:34,295 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:34,295 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 49 treesize of output 49 [2022-11-22 01:16:34,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:34,341 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:34,341 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 49 treesize of output 49 [2022-11-22 01:16:34,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:34,419 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:34,419 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 49 treesize of output 49 [2022-11-22 01:16:34,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:34,461 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:34,462 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 49 treesize of output 49 [2022-11-22 01:16:34,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:34,506 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:34,507 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 49 treesize of output 49 [2022-11-22 01:16:34,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:34,574 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:34,574 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 49 treesize of output 49 [2022-11-22 01:16:34,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:34,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:34,670 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:16:34,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2022-11-22 01:16:34,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:34,730 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:34,731 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 49 treesize of output 49 [2022-11-22 01:16:34,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:34,778 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:34,778 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 49 treesize of output 49 [2022-11-22 01:16:34,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:34,865 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:16:34,866 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 41 treesize of output 41 [2022-11-22 01:16:34,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:34,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:34,954 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-22 01:16:34,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-22 01:16:35,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:35,035 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:35,035 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 49 treesize of output 49 [2022-11-22 01:16:35,040 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:16:43,481 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18485#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 01:16:43,481 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:16:43,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:16:43,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2022-11-22 01:16:43,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733261452] [2022-11-22 01:16:43,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:16:43,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-22 01:16:43,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:16:43,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-22 01:16:43,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1385, Invalid=2155, Unknown=0, NotChecked=0, Total=3540 [2022-11-22 01:16:43,485 INFO L87 Difference]: Start difference. First operand 326 states and 387 transitions. Second operand has 50 states, 50 states have (on average 1.5) internal successors, (75), 49 states have internal predecessors, (75), 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) [2022-11-22 01:16:47,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:16:47,031 INFO L93 Difference]: Finished difference Result 1739 states and 2543 transitions. [2022-11-22 01:16:47,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-22 01:16:47,032 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.5) internal successors, (75), 49 states have internal predecessors, (75), 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 250 [2022-11-22 01:16:47,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:16:47,037 INFO L225 Difference]: With dead ends: 1739 [2022-11-22 01:16:47,037 INFO L226 Difference]: Without dead ends: 1439 [2022-11-22 01:16:47,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 504 SyntacticMatches, 186 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15207 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=2604, Invalid=4202, Unknown=0, NotChecked=0, Total=6806 [2022-11-22 01:16:47,041 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1762 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 754 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1762 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 754 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:16:47,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1762 Valid, 140 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [754 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:16:47,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2022-11-22 01:16:47,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 590. [2022-11-22 01:16:47,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 1.1460101867572157) internal successors, (675), 589 states have internal predecessors, (675), 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) [2022-11-22 01:16:47,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 675 transitions. [2022-11-22 01:16:47,427 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 675 transitions. Word has length 250 [2022-11-22 01:16:47,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:16:47,427 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 675 transitions. [2022-11-22 01:16:47,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.5) internal successors, (75), 49 states have internal predecessors, (75), 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) [2022-11-22 01:16:47,428 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 675 transitions. [2022-11-22 01:16:47,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2022-11-22 01:16:47,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:16:47,431 INFO L195 NwaCegarLoop]: trace histogram [368, 8, 8, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:16:47,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-22 01:16:47,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-22 01:16:47,639 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:16:47,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:16:47,639 INFO L85 PathProgramCache]: Analyzing trace with hash -612360282, now seen corresponding path program 11 times [2022-11-22 01:16:47,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:16:47,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993987685] [2022-11-22 01:16:47,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:16:47,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:16:47,775 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:16:47,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61161720] [2022-11-22 01:16:47,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:16:47,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:16:47,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:16:47,777 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:16:47,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-22 01:16:48,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 01:16:48,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:16:48,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:16:48,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:16:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 70718 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 70698 trivial. 0 not checked. [2022-11-22 01:16:48,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:16:48,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:16:48,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993987685] [2022-11-22 01:16:48,845 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:16:48,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61161720] [2022-11-22 01:16:48,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61161720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:16:48,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:16:48,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:16:48,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229980407] [2022-11-22 01:16:48,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:16:48,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:16:48,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:16:48,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:16:48,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:16:48,847 INFO L87 Difference]: Start difference. First operand 590 states and 675 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2022-11-22 01:16:49,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:16:49,205 INFO L93 Difference]: Finished difference Result 765 states and 911 transitions. [2022-11-22 01:16:49,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:16:49,206 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) Word has length 442 [2022-11-22 01:16:49,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:16:49,209 INFO L225 Difference]: With dead ends: 765 [2022-11-22 01:16:49,209 INFO L226 Difference]: Without dead ends: 594 [2022-11-22 01:16:49,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:16:49,210 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:16:49,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 11 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:16:49,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-11-22 01:16:49,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 591. [2022-11-22 01:16:49,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 1.1440677966101696) internal successors, (675), 590 states have internal predecessors, (675), 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) [2022-11-22 01:16:49,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 675 transitions. [2022-11-22 01:16:49,477 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 675 transitions. Word has length 442 [2022-11-22 01:16:49,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:16:49,478 INFO L495 AbstractCegarLoop]: Abstraction has 591 states and 675 transitions. [2022-11-22 01:16:49,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2022-11-22 01:16:49,478 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 675 transitions. [2022-11-22 01:16:49,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2022-11-22 01:16:49,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:16:49,480 INFO L195 NwaCegarLoop]: trace histogram [368, 8, 8, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:16:49,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-22 01:16:49,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:16:49,681 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:16:49,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:16:49,681 INFO L85 PathProgramCache]: Analyzing trace with hash -234018727, now seen corresponding path program 12 times [2022-11-22 01:16:49,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:16:49,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773659050] [2022-11-22 01:16:49,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:16:49,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:16:49,818 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:16:49,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [778776713] [2022-11-22 01:16:49,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:16:49,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:16:49,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:16:49,820 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:16:49,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-22 01:16:50,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:16:50,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:16:50,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 01:16:50,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:16:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 70728 backedges. 41 proven. 3 refuted. 0 times theorem prover too weak. 70684 trivial. 0 not checked. [2022-11-22 01:16:50,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:16:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 70728 backedges. 41 proven. 3 refuted. 0 times theorem prover too weak. 70684 trivial. 0 not checked. [2022-11-22 01:16:50,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:16:50,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773659050] [2022-11-22 01:16:50,545 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:16:50,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778776713] [2022-11-22 01:16:50,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778776713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:16:50,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1856544756] [2022-11-22 01:16:50,547 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 01:16:50,547 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:16:50,547 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:16:50,548 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:16:50,548 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:16:50,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:50,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:50,623 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-11-22 01:16:50,624 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 3 case distinctions, treesize of input 39 treesize of output 63 [2022-11-22 01:16:50,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:50,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:50,697 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:16:50,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:16:50,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:50,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2022-11-22 01:16:50,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:50,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:50,988 INFO L321 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-11-22 01:16:50,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 410 treesize of output 396 [2022-11-22 01:16:51,151 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 28 treesize of output 24 [2022-11-22 01:16:51,198 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 28 treesize of output 24 [2022-11-22 01:16:51,299 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 28 treesize of output 24 [2022-11-22 01:16:51,344 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 28 treesize of output 24 [2022-11-22 01:16:51,375 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 28 treesize of output 24 [2022-11-22 01:16:51,427 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 28 treesize of output 24 [2022-11-22 01:16:51,502 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 142 treesize of output 120 [2022-11-22 01:16:51,551 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 28 treesize of output 24 [2022-11-22 01:16:51,595 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 28 treesize of output 24 [2022-11-22 01:16:51,649 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 28 treesize of output 24 [2022-11-22 01:16:51,714 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 142 treesize of output 120 [2022-11-22 01:16:51,792 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 28 treesize of output 24 [2022-11-22 01:16:51,840 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 28 treesize of output 24 [2022-11-22 01:16:51,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:51,898 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:16:51,898 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 41 treesize of output 41 [2022-11-22 01:16:51,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:51,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:51,975 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-22 01:16:51,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 175 [2022-11-22 01:16:52,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:52,031 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:52,031 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 49 treesize of output 49 [2022-11-22 01:16:52,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:52,096 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:16:52,097 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 41 treesize of output 41 [2022-11-22 01:16:52,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:52,135 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:52,136 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 49 treesize of output 49 [2022-11-22 01:16:52,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:52,203 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:52,203 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 49 treesize of output 49 [2022-11-22 01:16:52,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:52,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:52,246 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:16:52,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-11-22 01:16:52,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:52,289 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:52,289 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 49 treesize of output 49 [2022-11-22 01:16:52,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:52,342 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:16:52,343 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 41 treesize of output 41 [2022-11-22 01:16:52,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:52,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:52,437 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-22 01:16:52,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2022-11-22 01:16:52,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:52,520 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:52,521 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 49 treesize of output 49 [2022-11-22 01:16:52,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:52,644 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:16:52,645 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 47 treesize of output 47 [2022-11-22 01:16:52,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:52,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:52,795 INFO L321 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2022-11-22 01:16:52,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 198 [2022-11-22 01:16:52,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:52,871 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:52,872 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 49 treesize of output 49 [2022-11-22 01:16:52,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:52,921 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:52,921 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 49 treesize of output 49 [2022-11-22 01:16:52,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:52,998 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:52,998 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 49 treesize of output 49 [2022-11-22 01:16:53,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:53,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:53,086 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:16:53,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2022-11-22 01:16:53,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:53,177 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:53,177 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 49 treesize of output 49 [2022-11-22 01:16:53,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:53,224 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:53,224 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 49 treesize of output 49 [2022-11-22 01:16:53,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:53,288 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:16:53,288 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 47 treesize of output 47 [2022-11-22 01:16:53,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:53,333 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:53,334 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 49 treesize of output 49 [2022-11-22 01:16:53,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:53,377 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:53,377 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 49 treesize of output 49 [2022-11-22 01:16:53,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:53,436 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:53,436 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 49 treesize of output 49 [2022-11-22 01:16:53,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:53,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:53,483 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:16:53,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-22 01:16:53,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:16:53,522 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:16:53,522 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 49 treesize of output 49 [2022-11-22 01:16:53,528 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:17:01,992 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29541#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 01:17:01,992 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:17:01,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:17:01,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-11-22 01:17:01,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288884355] [2022-11-22 01:17:01,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:17:01,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 01:17:01,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:01,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 01:17:01,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2022-11-22 01:17:01,994 INFO L87 Difference]: Start difference. First operand 591 states and 675 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 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) [2022-11-22 01:17:02,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:02,568 INFO L93 Difference]: Finished difference Result 1003 states and 1217 transitions. [2022-11-22 01:17:02,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 01:17:02,568 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 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 443 [2022-11-22 01:17:02,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:02,572 INFO L225 Difference]: With dead ends: 1003 [2022-11-22 01:17:02,572 INFO L226 Difference]: Without dead ends: 812 [2022-11-22 01:17:02,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1334 GetRequests, 930 SyntacticMatches, 379 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3999 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-11-22 01:17:02,574 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:17:02,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 40 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:17:02,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-11-22 01:17:02,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 607. [2022-11-22 01:17:02,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 1.1485148514851484) internal successors, (696), 606 states have internal predecessors, (696), 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) [2022-11-22 01:17:02,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 696 transitions. [2022-11-22 01:17:02,871 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 696 transitions. Word has length 443 [2022-11-22 01:17:02,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:02,872 INFO L495 AbstractCegarLoop]: Abstraction has 607 states and 696 transitions. [2022-11-22 01:17:02,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 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) [2022-11-22 01:17:02,872 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 696 transitions. [2022-11-22 01:17:02,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-11-22 01:17:02,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:02,874 INFO L195 NwaCegarLoop]: trace histogram [368, 13, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:17:02,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-22 01:17:03,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-22 01:17:03,075 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:17:03,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:03,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1654232045, now seen corresponding path program 13 times [2022-11-22 01:17:03,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:03,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971084100] [2022-11-22 01:17:03,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:03,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:03,202 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:17:03,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003731498] [2022-11-22 01:17:03,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:17:03,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:17:03,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:17:03,204 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:17:03,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-22 01:17:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:04,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 3727 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-22 01:17:04,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:17:05,738 INFO L134 CoverageAnalysis]: Checked inductivity of 70890 backedges. 15478 proven. 1081 refuted. 0 times theorem prover too weak. 54331 trivial. 0 not checked. [2022-11-22 01:17:05,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:17:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 70890 backedges. 15478 proven. 1081 refuted. 0 times theorem prover too weak. 54331 trivial. 0 not checked. [2022-11-22 01:17:07,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:07,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971084100] [2022-11-22 01:17:07,931 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:17:07,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003731498] [2022-11-22 01:17:07,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003731498] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:17:07,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1896081475] [2022-11-22 01:17:07,933 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 01:17:07,934 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:17:07,935 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:17:07,936 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:17:07,936 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:17:07,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:07,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:08,000 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-11-22 01:17:08,001 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 3 case distinctions, treesize of input 39 treesize of output 63 [2022-11-22 01:17:08,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:08,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:08,085 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:17:08,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:17:08,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:08,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-11-22 01:17:08,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:08,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:08,347 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-22 01:17:08,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 394 [2022-11-22 01:17:08,450 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 28 treesize of output 24 [2022-11-22 01:17:08,498 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 28 treesize of output 24 [2022-11-22 01:17:08,582 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 28 treesize of output 24 [2022-11-22 01:17:08,629 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 28 treesize of output 24 [2022-11-22 01:17:08,661 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 28 treesize of output 24 [2022-11-22 01:17:08,713 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 28 treesize of output 24 [2022-11-22 01:17:08,793 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 142 treesize of output 120 [2022-11-22 01:17:08,849 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 28 treesize of output 24 [2022-11-22 01:17:08,904 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 28 treesize of output 24 [2022-11-22 01:17:08,965 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 28 treesize of output 24 [2022-11-22 01:17:09,043 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 142 treesize of output 120 [2022-11-22 01:17:09,098 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 28 treesize of output 24 [2022-11-22 01:17:09,141 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 28 treesize of output 24 [2022-11-22 01:17:09,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:09,249 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:17:09,249 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 41 treesize of output 41 [2022-11-22 01:17:09,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:09,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:09,333 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-22 01:17:09,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 185 [2022-11-22 01:17:09,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:09,444 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:17:09,444 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 49 treesize of output 49 [2022-11-22 01:17:09,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:09,512 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:17:09,512 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 49 treesize of output 49 [2022-11-22 01:17:09,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:09,557 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:17:09,557 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 49 treesize of output 49 [2022-11-22 01:17:09,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:09,609 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:17:09,609 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 49 treesize of output 49 [2022-11-22 01:17:09,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:09,685 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:17:09,685 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 41 treesize of output 41 [2022-11-22 01:17:09,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:09,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:09,797 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-22 01:17:09,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 163 [2022-11-22 01:17:09,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:09,869 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:17:09,870 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 49 treesize of output 49 [2022-11-22 01:17:09,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:09,933 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:17:09,933 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 49 treesize of output 49 [2022-11-22 01:17:09,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:09,970 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:17:09,971 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 49 treesize of output 49 [2022-11-22 01:17:09,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:10,009 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:17:10,010 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 49 treesize of output 49 [2022-11-22 01:17:10,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:10,105 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:17:10,105 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 47 treesize of output 47 [2022-11-22 01:17:10,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:10,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:10,227 INFO L321 Elim1Store]: treesize reduction 147, result has 41.0 percent of original size [2022-11-22 01:17:10,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 211 [2022-11-22 01:17:10,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:10,307 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:17:10,307 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 49 treesize of output 49 [2022-11-22 01:17:10,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:10,351 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:17:10,351 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 49 treesize of output 49 [2022-11-22 01:17:10,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:10,420 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:17:10,420 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 47 treesize of output 47 [2022-11-22 01:17:10,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:10,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:10,546 INFO L321 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2022-11-22 01:17:10,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 192 [2022-11-22 01:17:10,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:10,636 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:17:10,636 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 49 treesize of output 49 [2022-11-22 01:17:10,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:10,679 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:17:10,680 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 49 treesize of output 49 [2022-11-22 01:17:10,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:10,744 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:17:10,744 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 47 treesize of output 47 [2022-11-22 01:17:10,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:10,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:10,957 INFO L321 Elim1Store]: treesize reduction 147, result has 41.0 percent of original size [2022-11-22 01:17:10,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 205 [2022-11-22 01:17:11,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:11,089 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:17:11,089 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 49 treesize of output 49 [2022-11-22 01:17:11,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:11,143 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:17:11,143 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 49 treesize of output 49 [2022-11-22 01:17:11,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:11,225 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:17:11,225 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 49 treesize of output 49 [2022-11-22 01:17:11,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:11,278 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:17:11,279 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 49 treesize of output 49 [2022-11-22 01:17:11,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:17:11,323 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:17:11,323 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 49 treesize of output 49 [2022-11-22 01:17:11,328 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:17:37,759 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35410#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 01:17:37,759 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:17:37,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:17:37,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 97 [2022-11-22 01:17:37,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992741642] [2022-11-22 01:17:37,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:17:37,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-11-22 01:17:37,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:37,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-11-22 01:17:37,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4998, Invalid=6344, Unknown=0, NotChecked=0, Total=11342 [2022-11-22 01:17:37,767 INFO L87 Difference]: Start difference. First operand 607 states and 696 transitions. Second operand has 98 states, 98 states have (on average 1.2551020408163265) internal successors, (123), 97 states have internal predecessors, (123), 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) [2022-11-22 01:17:53,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:53,411 INFO L93 Difference]: Finished difference Result 4184 states and 6130 transitions. [2022-11-22 01:17:53,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-22 01:17:53,412 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.2551020408163265) internal successors, (123), 97 states have internal predecessors, (123), 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 455 [2022-11-22 01:17:53,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:53,424 INFO L225 Difference]: With dead ends: 4184 [2022-11-22 01:17:53,424 INFO L226 Difference]: Without dead ends: 3627 [2022-11-22 01:17:53,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1410 GetRequests, 864 SyntacticMatches, 394 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62485 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=9745, Invalid=13817, Unknown=0, NotChecked=0, Total=23562 [2022-11-22 01:17:53,432 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4160 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 2255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4160 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 3075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2255 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:17:53,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4160 Valid, 284 Invalid, 3075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2255 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-22 01:17:53,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3627 states. [2022-11-22 01:17:54,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3627 to 1135. [2022-11-22 01:17:54,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 1.1216931216931216) internal successors, (1272), 1134 states have internal predecessors, (1272), 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) [2022-11-22 01:17:54,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1272 transitions. [2022-11-22 01:17:54,212 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1272 transitions. Word has length 455 [2022-11-22 01:17:54,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:54,213 INFO L495 AbstractCegarLoop]: Abstraction has 1135 states and 1272 transitions. [2022-11-22 01:17:54,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.2551020408163265) internal successors, (123), 97 states have internal predecessors, (123), 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) [2022-11-22 01:17:54,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1272 transitions. [2022-11-22 01:17:54,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 840 [2022-11-22 01:17:54,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:54,222 INFO L195 NwaCegarLoop]: trace histogram [752, 13, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:17:54,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-22 01:17:54,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:17:54,442 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:17:54,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:54,442 INFO L85 PathProgramCache]: Analyzing trace with hash 294079469, now seen corresponding path program 14 times [2022-11-22 01:17:54,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:54,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112379459] [2022-11-22 01:17:54,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:54,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:54,691 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:17:54,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1292714197] [2022-11-22 01:17:54,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:17:54,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:17:54,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:17:54,695 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:17:54,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-22 01:17:55,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 01:17:55,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:17:55,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:17:55,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:17:59,196 INFO L134 CoverageAnalysis]: Checked inductivity of 288810 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 288793 trivial. 0 not checked. [2022-11-22 01:17:59,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:18:00,849 INFO L134 CoverageAnalysis]: Checked inductivity of 288810 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 288793 trivial. 0 not checked. [2022-11-22 01:18:00,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:18:00,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112379459] [2022-11-22 01:18:00,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:18:00,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292714197] [2022-11-22 01:18:00,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292714197] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:18:00,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1448817315] [2022-11-22 01:18:00,855 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 01:18:00,855 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:18:00,856 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:18:00,856 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:18:00,856 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:18:00,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:00,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:00,940 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-11-22 01:18:00,940 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 3 case distinctions, treesize of input 39 treesize of output 63 [2022-11-22 01:18:00,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:00,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:01,027 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:18:01,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:18:01,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:01,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-11-22 01:18:01,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:01,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:01,279 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-22 01:18:01,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 394 [2022-11-22 01:18:01,435 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 28 treesize of output 24 [2022-11-22 01:18:01,483 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 28 treesize of output 24 [2022-11-22 01:18:01,578 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 24 treesize of output 20 [2022-11-22 01:18:01,653 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 28 treesize of output 24 [2022-11-22 01:18:01,698 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 28 treesize of output 24 [2022-11-22 01:18:01,762 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 24 treesize of output 20 [2022-11-22 01:18:01,856 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-22 01:18:01,857 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 134 treesize of output 122 [2022-11-22 01:18:01,948 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 28 treesize of output 24 [2022-11-22 01:18:02,010 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 28 treesize of output 24 [2022-11-22 01:18:02,069 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 24 treesize of output 20 [2022-11-22 01:18:02,153 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-22 01:18:02,153 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 134 treesize of output 122 [2022-11-22 01:18:02,244 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 28 treesize of output 24 [2022-11-22 01:18:02,288 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 28 treesize of output 24 [2022-11-22 01:18:02,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:02,350 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:18:02,350 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 49 treesize of output 49 [2022-11-22 01:18:02,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:02,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:02,397 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:18:02,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2022-11-22 01:18:02,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:02,438 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:18:02,439 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 49 treesize of output 49 [2022-11-22 01:18:02,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:02,502 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:18:02,503 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 41 treesize of output 41 [2022-11-22 01:18:02,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:02,544 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:18:02,544 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 49 treesize of output 49 [2022-11-22 01:18:02,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:02,607 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:18:02,607 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 41 treesize of output 41 [2022-11-22 01:18:02,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:02,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:02,695 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-22 01:18:02,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 173 [2022-11-22 01:18:02,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:02,760 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:18:02,760 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 49 treesize of output 49 [2022-11-22 01:18:02,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:02,815 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:18:02,815 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 41 treesize of output 41 [2022-11-22 01:18:02,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:02,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:02,931 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-22 01:18:02,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-22 01:18:02,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:02,996 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:18:02,997 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 49 treesize of output 49 [2022-11-22 01:18:03,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:03,119 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:18:03,120 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 49 treesize of output 49 [2022-11-22 01:18:03,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:03,212 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:18:03,212 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 49 treesize of output 49 [2022-11-22 01:18:03,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:03,261 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:18:03,262 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 49 treesize of output 49 [2022-11-22 01:18:03,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:03,333 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:18:03,334 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 47 treesize of output 47 [2022-11-22 01:18:03,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:03,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:03,461 INFO L321 Elim1Store]: treesize reduction 147, result has 41.0 percent of original size [2022-11-22 01:18:03,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 205 [2022-11-22 01:18:03,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:03,544 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:18:03,544 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 49 treesize of output 49 [2022-11-22 01:18:03,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:03,588 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:18:03,588 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 49 treesize of output 49 [2022-11-22 01:18:03,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:03,657 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:18:03,658 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 47 treesize of output 47 [2022-11-22 01:18:03,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:03,700 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:18:03,701 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 49 treesize of output 49 [2022-11-22 01:18:03,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:03,752 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:18:03,752 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 49 treesize of output 49 [2022-11-22 01:18:03,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:03,810 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:18:03,810 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 49 treesize of output 49 [2022-11-22 01:18:03,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:03,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:03,853 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:18:03,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-22 01:18:03,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:03,899 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:18:03,902 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 49 treesize of output 49 [2022-11-22 01:18:03,915 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:18:16,123 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '50757#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 01:18:16,124 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:18:16,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:18:16,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-11-22 01:18:16,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241716163] [2022-11-22 01:18:16,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:18:16,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:18:16,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:18:16,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:18:16,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-11-22 01:18:16,127 INFO L87 Difference]: Start difference. First operand 1135 states and 1272 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 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) [2022-11-22 01:18:16,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:16,732 INFO L93 Difference]: Finished difference Result 1449 states and 1694 transitions. [2022-11-22 01:18:16,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:18:16,732 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 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 839 [2022-11-22 01:18:16,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:16,735 INFO L225 Difference]: With dead ends: 1449 [2022-11-22 01:18:16,735 INFO L226 Difference]: Without dead ends: 1139 [2022-11-22 01:18:16,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2517 GetRequests, 1739 SyntacticMatches, 762 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3129 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2022-11-22 01:18:16,740 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 48 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:16,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 6 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:18:16,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2022-11-22 01:18:17,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1136. [2022-11-22 01:18:17,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 1.118942731277533) internal successors, (1270), 1135 states have internal predecessors, (1270), 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) [2022-11-22 01:18:17,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1270 transitions. [2022-11-22 01:18:17,372 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1270 transitions. Word has length 839 [2022-11-22 01:18:17,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:17,374 INFO L495 AbstractCegarLoop]: Abstraction has 1136 states and 1270 transitions. [2022-11-22 01:18:17,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 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) [2022-11-22 01:18:17,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1270 transitions. [2022-11-22 01:18:17,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 845 [2022-11-22 01:18:17,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:17,383 INFO L195 NwaCegarLoop]: trace histogram [752, 13, 8, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:18:17,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-22 01:18:17,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:18:17,584 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:18:17,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:17,584 INFO L85 PathProgramCache]: Analyzing trace with hash 814504007, now seen corresponding path program 15 times [2022-11-22 01:18:17,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:18:17,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423226003] [2022-11-22 01:18:17,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:17,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:18:17,832 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:18:17,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789552129] [2022-11-22 01:18:17,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:18:17,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:18:17,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:18:17,834 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:18:17,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-22 01:18:19,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:18:19,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:18:19,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 01:18:19,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 288855 backedges. 164 proven. 30 refuted. 0 times theorem prover too weak. 288661 trivial. 0 not checked. [2022-11-22 01:18:19,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:18:19,342 INFO L134 CoverageAnalysis]: Checked inductivity of 288855 backedges. 157 proven. 37 refuted. 0 times theorem prover too weak. 288661 trivial. 0 not checked. [2022-11-22 01:18:19,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:18:19,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423226003] [2022-11-22 01:18:19,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:18:19,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789552129] [2022-11-22 01:18:19,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789552129] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:18:19,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [787895343] [2022-11-22 01:18:19,344 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 01:18:19,344 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:18:19,344 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:18:19,345 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:18:19,345 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:18:19,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:19,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:19,410 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-11-22 01:18:19,411 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 3 case distinctions, treesize of input 39 treesize of output 63 [2022-11-22 01:18:19,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:19,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:19,485 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:18:19,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:18:19,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:19,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-11-22 01:18:19,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:19,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:19,785 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-22 01:18:19,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 394 [2022-11-22 01:18:19,899 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 28 treesize of output 24 [2022-11-22 01:18:19,948 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 28 treesize of output 24 [2022-11-22 01:18:20,046 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 28 treesize of output 24 [2022-11-22 01:18:20,090 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 28 treesize of output 24 [2022-11-22 01:18:20,122 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 28 treesize of output 24 [2022-11-22 01:18:20,176 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 24 treesize of output 20 [2022-11-22 01:18:20,266 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-22 01:18:20,266 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 134 treesize of output 122 [2022-11-22 01:18:20,364 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 28 treesize of output 24 [2022-11-22 01:18:20,418 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 28 treesize of output 24 [2022-11-22 01:18:20,464 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 24 treesize of output 20 [2022-11-22 01:18:20,547 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-22 01:18:20,548 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 134 treesize of output 122 [2022-11-22 01:18:20,631 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 28 treesize of output 24 [2022-11-22 01:18:20,679 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 28 treesize of output 24 [2022-11-22 01:18:20,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:20,758 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:18:20,759 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 49 treesize of output 49 [2022-11-22 01:18:20,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:20,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:20,810 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:18:20,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2022-11-22 01:18:20,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:20,863 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:18:20,863 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 49 treesize of output 49 [2022-11-22 01:18:20,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:20,942 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:18:20,942 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 49 treesize of output 49 [2022-11-22 01:18:20,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:20,993 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:18:20,993 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 49 treesize of output 49 [2022-11-22 01:18:21,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:21,047 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:18:21,047 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 49 treesize of output 49 [2022-11-22 01:18:21,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:21,137 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:18:21,137 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 49 treesize of output 49 [2022-11-22 01:18:21,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:21,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:21,190 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:18:21,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-11-22 01:18:21,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:21,238 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:18:21,239 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 49 treesize of output 49 [2022-11-22 01:18:21,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:21,288 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:18:21,288 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 41 treesize of output 41 [2022-11-22 01:18:21,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:21,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:21,371 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-22 01:18:21,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-22 01:18:21,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:21,431 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:18:21,432 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 49 treesize of output 49 [2022-11-22 01:18:21,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:21,546 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:18:21,547 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 49 treesize of output 49 [2022-11-22 01:18:21,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:21,590 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:18:21,591 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 49 treesize of output 49 [2022-11-22 01:18:21,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:21,729 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:18:21,729 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 49 treesize of output 49 [2022-11-22 01:18:21,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:21,820 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:18:21,820 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 47 treesize of output 47 [2022-11-22 01:18:21,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:21,871 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:18:21,872 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 49 treesize of output 49 [2022-11-22 01:18:21,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:21,916 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:18:21,916 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 49 treesize of output 49 [2022-11-22 01:18:21,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:21,981 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:18:21,981 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 49 treesize of output 49 [2022-11-22 01:18:22,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:22,028 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:18:22,029 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 49 treesize of output 49 [2022-11-22 01:18:22,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:22,073 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:18:22,073 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 49 treesize of output 49 [2022-11-22 01:18:22,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:22,134 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:18:22,135 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 41 treesize of output 41 [2022-11-22 01:18:22,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:22,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:22,235 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-22 01:18:22,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2022-11-22 01:18:22,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:18:22,328 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:18:22,328 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 49 treesize of output 49 [2022-11-22 01:18:22,333 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:18:42,444 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '60722#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 01:18:42,445 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:18:42,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:18:42,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-11-22 01:18:42,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461640541] [2022-11-22 01:18:42,446 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:18:42,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-22 01:18:42,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:18:42,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-22 01:18:42,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2022-11-22 01:18:42,448 INFO L87 Difference]: Start difference. First operand 1136 states and 1270 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:43,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:43,784 INFO L93 Difference]: Finished difference Result 1567 states and 1858 transitions. [2022-11-22 01:18:43,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-22 01:18:43,785 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 844 [2022-11-22 01:18:43,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:43,789 INFO L225 Difference]: With dead ends: 1567 [2022-11-22 01:18:43,789 INFO L226 Difference]: Without dead ends: 1198 [2022-11-22 01:18:43,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2547 GetRequests, 1744 SyntacticMatches, 763 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10446 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=401, Invalid=1321, Unknown=0, NotChecked=0, Total=1722 [2022-11-22 01:18:43,791 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 60 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:43,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 36 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:18:43,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2022-11-22 01:18:44,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1161. [2022-11-22 01:18:44,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 1160 states have (on average 1.1267241379310344) internal successors, (1307), 1160 states have internal predecessors, (1307), 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) [2022-11-22 01:18:44,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1307 transitions. [2022-11-22 01:18:44,343 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1307 transitions. Word has length 844 [2022-11-22 01:18:44,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:44,344 INFO L495 AbstractCegarLoop]: Abstraction has 1161 states and 1307 transitions. [2022-11-22 01:18:44,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:18:44,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1307 transitions. [2022-11-22 01:18:44,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2022-11-22 01:18:44,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:44,352 INFO L195 NwaCegarLoop]: trace histogram [752, 17, 8, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:18:44,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-22 01:18:44,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-22 01:18:44,553 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:18:44,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:44,553 INFO L85 PathProgramCache]: Analyzing trace with hash -937638281, now seen corresponding path program 16 times [2022-11-22 01:18:44,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:18:44,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350451594] [2022-11-22 01:18:44,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:44,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:18:44,826 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:18:44,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1014733810] [2022-11-22 01:18:44,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:18:44,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:18:44,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:18:44,827 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:18:44,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-22 01:18:47,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:47,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 7246 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-22 01:18:47,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:51,891 INFO L134 CoverageAnalysis]: Checked inductivity of 288941 backedges. 63190 proven. 4465 refuted. 0 times theorem prover too weak. 221286 trivial. 0 not checked. [2022-11-22 01:18:51,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:19:00,410 INFO L134 CoverageAnalysis]: Checked inductivity of 288941 backedges. 63190 proven. 4465 refuted. 0 times theorem prover too weak. 221286 trivial. 0 not checked. [2022-11-22 01:19:00,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:19:00,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350451594] [2022-11-22 01:19:00,411 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:19:00,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014733810] [2022-11-22 01:19:00,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014733810] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:19:00,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [408202815] [2022-11-22 01:19:00,413 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 01:19:00,413 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:19:00,414 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:19:00,414 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:19:00,414 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:19:00,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:00,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:00,484 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-11-22 01:19:00,484 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 3 case distinctions, treesize of input 39 treesize of output 63 [2022-11-22 01:19:00,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:00,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:00,559 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:19:00,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:19:00,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:00,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2022-11-22 01:19:00,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:19:00,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:00,817 INFO L321 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-11-22 01:19:00,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 410 treesize of output 396 [2022-11-22 01:19:00,980 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 28 treesize of output 24 [2022-11-22 01:19:01,030 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 28 treesize of output 24 [2022-11-22 01:19:01,136 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 24 treesize of output 20 [2022-11-22 01:19:01,206 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 28 treesize of output 24 [2022-11-22 01:19:01,252 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 28 treesize of output 24 [2022-11-22 01:19:01,309 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 28 treesize of output 24 [2022-11-22 01:19:01,372 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 142 treesize of output 120 [2022-11-22 01:19:01,424 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 28 treesize of output 24 [2022-11-22 01:19:01,468 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 28 treesize of output 24 [2022-11-22 01:19:01,519 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 28 treesize of output 24 [2022-11-22 01:19:01,584 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 142 treesize of output 120 [2022-11-22 01:19:01,638 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 28 treesize of output 24 [2022-11-22 01:19:01,684 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 28 treesize of output 24 [2022-11-22 01:19:01,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:01,742 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:19:01,742 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 41 treesize of output 41 [2022-11-22 01:19:01,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:01,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:01,821 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-22 01:19:01,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 185 [2022-11-22 01:19:01,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:02,007 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:19:02,007 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 49 treesize of output 49 [2022-11-22 01:19:02,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:02,076 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:19:02,076 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 49 treesize of output 49 [2022-11-22 01:19:02,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:02,130 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:19:02,130 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 49 treesize of output 49 [2022-11-22 01:19:02,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:02,175 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:19:02,175 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 49 treesize of output 49 [2022-11-22 01:19:02,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:02,246 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:19:02,247 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 49 treesize of output 49 [2022-11-22 01:19:02,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:02,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:02,296 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:19:02,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-11-22 01:19:02,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:02,343 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:19:02,343 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 49 treesize of output 49 [2022-11-22 01:19:02,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:02,392 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:19:02,392 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 41 treesize of output 41 [2022-11-22 01:19:02,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:02,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:02,475 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-22 01:19:02,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2022-11-22 01:19:02,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:02,564 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:19:02,564 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 49 treesize of output 49 [2022-11-22 01:19:02,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:02,664 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:19:02,665 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 47 treesize of output 47 [2022-11-22 01:19:02,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:02,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:02,787 INFO L321 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2022-11-22 01:19:02,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 198 [2022-11-22 01:19:02,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:02,855 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:19:02,856 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 49 treesize of output 49 [2022-11-22 01:19:02,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:02,906 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:19:02,906 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 49 treesize of output 49 [2022-11-22 01:19:02,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:02,975 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:19:02,975 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 47 treesize of output 47 [2022-11-22 01:19:03,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:03,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:03,117 INFO L321 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2022-11-22 01:19:03,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 192 [2022-11-22 01:19:03,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:03,208 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:19:03,208 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 49 treesize of output 49 [2022-11-22 01:19:03,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:03,256 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:19:03,256 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 49 treesize of output 49 [2022-11-22 01:19:03,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:03,320 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:19:03,321 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 47 treesize of output 47 [2022-11-22 01:19:03,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:03,360 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:19:03,360 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 49 treesize of output 49 [2022-11-22 01:19:03,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:03,409 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:19:03,409 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 49 treesize of output 49 [2022-11-22 01:19:03,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:03,464 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:19:03,464 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 41 treesize of output 41 [2022-11-22 01:19:03,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:03,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:03,538 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-22 01:19:03,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-22 01:19:03,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:19:03,593 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:19:03,593 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 49 treesize of output 49 [2022-11-22 01:19:03,596 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:20:35,356 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '71202#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 01:20:35,357 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:20:35,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:20:35,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 193 [2022-11-22 01:20:35,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233395312] [2022-11-22 01:20:35,358 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:20:35,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-11-22 01:20:35,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:20:35,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-11-22 01:20:35,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19169, Invalid=22243, Unknown=0, NotChecked=0, Total=41412 [2022-11-22 01:20:35,368 INFO L87 Difference]: Start difference. First operand 1161 states and 1307 transitions. Second operand has 194 states, 194 states have (on average 1.1288659793814433) internal successors, (219), 193 states have internal predecessors, (219), 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) [2022-11-22 01:22:32,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:22:32,637 INFO L93 Difference]: Finished difference Result 9848 states and 14847 transitions. [2022-11-22 01:22:32,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-11-22 01:22:32,641 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 1.1288659793814433) internal successors, (219), 193 states have internal predecessors, (219), 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 848 [2022-11-22 01:22:32,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:22:32,663 INFO L225 Difference]: With dead ends: 9848 [2022-11-22 01:22:32,663 INFO L226 Difference]: Without dead ends: 8785 [2022-11-22 01:22:32,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2637 GetRequests, 1578 SyntacticMatches, 762 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240567 ImplicationChecksByTransitivity, 115.7s TimeCoverageRelationStatistics Valid=37884, Invalid=51218, Unknown=0, NotChecked=0, Total=89102 [2022-11-22 01:22:32,675 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7259 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 1639 mSolverCounterSat, 3296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7259 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 4935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3296 IncrementalHoareTripleChecker+Valid, 1639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:22:32,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7259 Valid, 572 Invalid, 4935 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3296 Valid, 1639 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-22 01:22:32,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8785 states. [2022-11-22 01:22:33,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8785 to 2217. [2022-11-22 01:22:33,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 2216 states have (on average 1.1096570397111913) internal successors, (2459), 2216 states have internal predecessors, (2459), 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) [2022-11-22 01:22:33,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 2459 transitions. [2022-11-22 01:22:33,833 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 2459 transitions. Word has length 848 [2022-11-22 01:22:33,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:22:33,833 INFO L495 AbstractCegarLoop]: Abstraction has 2217 states and 2459 transitions. [2022-11-22 01:22:33,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 1.1288659793814433) internal successors, (219), 193 states have internal predecessors, (219), 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) [2022-11-22 01:22:33,834 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 2459 transitions. [2022-11-22 01:22:33,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1617 [2022-11-22 01:22:33,857 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:22:33,858 INFO L195 NwaCegarLoop]: trace histogram [1520, 17, 8, 8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:22:33,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-22 01:22:34,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-22 01:22:34,063 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:22:34,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:22:34,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1171215991, now seen corresponding path program 17 times [2022-11-22 01:22:34,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:22:34,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051558582] [2022-11-22 01:22:34,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:22:34,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:22:34,557 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:22:34,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [381353487] [2022-11-22 01:22:34,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:22:34,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:22:34,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:22:34,559 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:22:34,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-22 01:22:37,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-22 01:22:37,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:22:37,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:22:37,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:22:39,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1167149 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 1167090 trivial. 0 not checked. [2022-11-22 01:22:39,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:22:42,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1167149 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 1167090 trivial. 0 not checked. [2022-11-22 01:22:42,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:22:42,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051558582] [2022-11-22 01:22:42,972 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:22:42,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381353487] [2022-11-22 01:22:42,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381353487] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:22:42,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1040854322] [2022-11-22 01:22:42,974 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 01:22:42,975 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:22:42,975 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:22:42,975 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:22:42,975 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:22:42,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:42,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:43,041 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-11-22 01:22:43,041 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 3 case distinctions, treesize of input 39 treesize of output 63 [2022-11-22 01:22:43,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:43,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:43,113 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:22:43,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:22:43,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:43,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2022-11-22 01:22:43,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:22:43,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:43,374 INFO L321 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-11-22 01:22:43,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 410 treesize of output 396 [2022-11-22 01:22:43,571 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 28 treesize of output 24 [2022-11-22 01:22:43,622 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 28 treesize of output 24 [2022-11-22 01:22:43,731 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 28 treesize of output 24 [2022-11-22 01:22:43,780 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 28 treesize of output 24 [2022-11-22 01:22:43,819 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 28 treesize of output 24 [2022-11-22 01:22:43,876 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 24 treesize of output 20 [2022-11-22 01:22:43,964 INFO L321 Elim1Store]: treesize reduction 28, result has 48.1 percent of original size [2022-11-22 01:22:43,964 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 134 treesize of output 122 [2022-11-22 01:22:44,056 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 28 treesize of output 24 [2022-11-22 01:22:44,105 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 28 treesize of output 24 [2022-11-22 01:22:44,159 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 28 treesize of output 24 [2022-11-22 01:22:44,229 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 142 treesize of output 120 [2022-11-22 01:22:44,281 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 28 treesize of output 24 [2022-11-22 01:22:44,327 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 28 treesize of output 24 [2022-11-22 01:22:44,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:44,393 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:22:44,393 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 49 treesize of output 49 [2022-11-22 01:22:44,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:44,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:44,445 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:22:44,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2022-11-22 01:22:44,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:44,491 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:22:44,491 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 49 treesize of output 49 [2022-11-22 01:22:44,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:44,564 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:22:44,564 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 49 treesize of output 49 [2022-11-22 01:22:44,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:44,619 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:22:44,620 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 49 treesize of output 49 [2022-11-22 01:22:44,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:44,669 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:22:44,671 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 49 treesize of output 49 [2022-11-22 01:22:44,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:44,767 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:22:44,768 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 49 treesize of output 49 [2022-11-22 01:22:44,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:44,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:44,815 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:22:44,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-11-22 01:22:44,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:44,863 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:22:44,863 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 49 treesize of output 49 [2022-11-22 01:22:44,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:44,918 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:22:44,918 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 41 treesize of output 41 [2022-11-22 01:22:44,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:44,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:45,008 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-22 01:22:45,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-22 01:22:45,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:45,066 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:22:45,066 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 49 treesize of output 49 [2022-11-22 01:22:45,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:45,182 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:22:45,182 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 47 treesize of output 47 [2022-11-22 01:22:45,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:45,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:45,323 INFO L321 Elim1Store]: treesize reduction 147, result has 41.0 percent of original size [2022-11-22 01:22:45,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 211 [2022-11-22 01:22:45,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:45,437 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:22:45,437 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 49 treesize of output 49 [2022-11-22 01:22:45,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:45,485 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:22:45,486 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 49 treesize of output 49 [2022-11-22 01:22:45,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:45,570 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:22:45,570 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 49 treesize of output 49 [2022-11-22 01:22:45,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:45,616 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:22:45,617 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 49 treesize of output 49 [2022-11-22 01:22:45,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:45,668 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:22:45,668 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 49 treesize of output 49 [2022-11-22 01:22:45,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:45,736 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:22:45,736 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 49 treesize of output 49 [2022-11-22 01:22:45,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:45,791 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:22:45,791 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 49 treesize of output 49 [2022-11-22 01:22:45,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:45,845 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:22:45,845 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 49 treesize of output 49 [2022-11-22 01:22:45,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:45,914 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:22:45,915 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 41 treesize of output 41 [2022-11-22 01:22:46,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:46,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:46,126 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-22 01:22:46,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-22 01:22:46,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:22:46,199 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:22:46,200 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 49 treesize of output 49 [2022-11-22 01:22:46,205 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:23:12,252 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '104370#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 01:23:12,252 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:23:12,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:23:12,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-22 01:23:12,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627956817] [2022-11-22 01:23:12,254 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:23:12,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:23:12,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:23:12,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:23:12,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2022-11-22 01:23:12,257 INFO L87 Difference]: Start difference. First operand 2217 states and 2459 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 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) [2022-11-22 01:23:13,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:23:13,736 INFO L93 Difference]: Finished difference Result 2878 states and 3342 transitions. [2022-11-22 01:23:13,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:23:13,737 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 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 1616 [2022-11-22 01:23:13,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:23:13,745 INFO L225 Difference]: With dead ends: 2878 [2022-11-22 01:23:13,746 INFO L226 Difference]: Without dead ends: 2213 [2022-11-22 01:23:13,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4848 GetRequests, 3300 SyntacticMatches, 1530 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10839 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2022-11-22 01:23:13,748 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 62 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:23:13,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 20 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:23:13,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2213 states. [2022-11-22 01:23:14,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2213 to 2204. [2022-11-22 01:23:14,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2203 states have (on average 1.1030413073082161) internal successors, (2430), 2203 states have internal predecessors, (2430), 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) [2022-11-22 01:23:14,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 2430 transitions. [2022-11-22 01:23:14,843 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 2430 transitions. Word has length 1616 [2022-11-22 01:23:14,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:23:14,844 INFO L495 AbstractCegarLoop]: Abstraction has 2204 states and 2430 transitions. [2022-11-22 01:23:14,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 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) [2022-11-22 01:23:14,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 2430 transitions. [2022-11-22 01:23:14,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1634 [2022-11-22 01:23:14,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:23:14,870 INFO L195 NwaCegarLoop]: trace histogram [1520, 32, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:23:14,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-22 01:23:15,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-22 01:23:15,082 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:23:15,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:23:15,083 INFO L85 PathProgramCache]: Analyzing trace with hash -816145346, now seen corresponding path program 18 times [2022-11-22 01:23:15,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:23:15,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096641228] [2022-11-22 01:23:15,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:23:15,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:23:15,593 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:23:15,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916134070] [2022-11-22 01:23:15,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:23:15,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:23:15,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:23:15,599 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:23:15,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-22 01:23:18,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:23:18,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:23:18,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 01:23:18,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:23:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1167664 backedges. 337 proven. 32 refuted. 0 times theorem prover too weak. 1167295 trivial. 0 not checked. [2022-11-22 01:23:18,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:23:18,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1167664 backedges. 337 proven. 32 refuted. 0 times theorem prover too weak. 1167295 trivial. 0 not checked. [2022-11-22 01:23:18,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:23:18,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096641228] [2022-11-22 01:23:18,369 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:23:18,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916134070] [2022-11-22 01:23:18,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916134070] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:23:18,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1949323630] [2022-11-22 01:23:18,371 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 01:23:18,371 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:23:18,372 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:23:18,372 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:23:18,372 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:23:18,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:23:18,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:23:18,445 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-11-22 01:23:18,445 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 3 case distinctions, treesize of input 39 treesize of output 63 [2022-11-22 01:23:18,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:23:18,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:23:18,526 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:23:18,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:23:18,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:23:18,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-11-22 01:23:18,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:23:18,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:23:18,803 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-22 01:23:18,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 394 [2022-11-22 01:23:18,910 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 28 treesize of output 24 [2022-11-22 01:23:18,958 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 28 treesize of output 24 [2022-11-22 01:23:19,069 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 28 treesize of output 24 [2022-11-22 01:23:19,115 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 28 treesize of output 24 [2022-11-22 01:23:19,153 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 28 treesize of output 24 [2022-11-22 01:23:19,212 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 28 treesize of output 24 [2022-11-22 01:23:19,283 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 142 treesize of output 120 [2022-11-22 01:23:19,340 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 28 treesize of output 24 [2022-11-22 01:23:19,529 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 28 treesize of output 24 [2022-11-22 01:23:19,596 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 28 treesize of output 24 [2022-11-22 01:23:19,670 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 142 treesize of output 120 [2022-11-22 01:23:19,729 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 28 treesize of output 24 [2022-11-22 01:23:19,776 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 28 treesize of output 24 [2022-11-22 01:23:19,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:23:19,839 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:23:19,839 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 41 treesize of output 41 [2022-11-22 01:23:19,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:23:19,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:23:19,946 INFO L321 Elim1Store]: treesize reduction 127, result has 41.2 percent of original size [2022-11-22 01:23:19,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 185 [2022-11-22 01:23:20,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:23:20,021 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:23:20,022 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 49 treesize of output 49 [2022-11-22 01:23:20,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:23:20,093 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:23:20,094 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 41 treesize of output 41 [2022-11-22 01:23:20,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:23:20,138 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:23:20,139 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 49 treesize of output 49 [2022-11-22 01:23:20,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:23:20,222 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:23:20,222 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 49 treesize of output 49 [2022-11-22 01:23:20,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:23:20,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:23:20,274 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:23:20,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2022-11-22 01:23:20,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:23:20,324 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:23:20,324 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 49 treesize of output 49 [2022-11-22 01:23:20,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:23:20,377 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:23:20,378 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 49 treesize of output 49 [2022-11-22 01:23:20,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:23:20,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:23:20,427 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:23:20,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-22 01:23:20,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:23:20,474 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:23:20,475 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 49 treesize of output 49 [2022-11-22 01:23:20,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:23:20,589 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:23:20,590 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 49 treesize of output 49 [2022-11-22 01:23:20,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:23:20,641 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:23:20,642 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 49 treesize of output 49 [2022-11-22 01:23:20,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:23:20,698 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:23:20,698 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 49 treesize of output 49 [2022-11-22 01:23:20,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:23:20,781 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:23:20,781 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 47 treesize of output 47 [2022-11-22 01:23:20,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:23:20,828 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:23:20,828 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 49 treesize of output 49 [2022-11-22 01:23:20,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:23:20,882 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:23:20,883 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 49 treesize of output 49 [2022-11-22 01:23:20,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:23:20,958 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:23:20,959 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 47 treesize of output 47 [2022-11-22 01:23:20,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:23:21,002 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:23:21,002 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 49 treesize of output 49 [2022-11-22 01:23:21,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:23:21,051 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:23:21,051 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 49 treesize of output 49 [2022-11-22 01:23:21,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:23:21,115 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:23:21,115 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 41 treesize of output 41 [2022-11-22 01:23:21,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:23:21,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:23:21,198 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-22 01:23:21,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-22 01:23:21,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:23:21,258 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:23:21,258 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 49 treesize of output 49 [2022-11-22 01:23:21,262 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:24:07,272 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '123772#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|)))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~p~0#1| 500) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 01:24:07,272 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:24:07,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:24:07,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-11-22 01:24:07,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14439239] [2022-11-22 01:24:07,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:24:07,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-22 01:24:07,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:24:07,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-22 01:24:07,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2022-11-22 01:24:07,277 INFO L87 Difference]: Start difference. First operand 2204 states and 2430 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 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) [2022-11-22 01:24:10,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:24:10,810 INFO L93 Difference]: Finished difference Result 7531 states and 8391 transitions. [2022-11-22 01:24:10,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-22 01:24:10,810 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 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 1633 [2022-11-22 01:24:10,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:24:10,838 INFO L225 Difference]: With dead ends: 7531 [2022-11-22 01:24:10,838 INFO L226 Difference]: Without dead ends: 6887 [2022-11-22 01:24:10,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4928 GetRequests, 3353 SyntacticMatches, 1530 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28285 ImplicationChecksByTransitivity, 46.0s TimeCoverageRelationStatistics Valid=494, Invalid=1668, Unknown=0, NotChecked=0, Total=2162 [2022-11-22 01:24:10,842 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 140 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:24:10,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 77 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:24:10,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6887 states. [2022-11-22 01:24:12,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6887 to 2252. [2022-11-22 01:24:12,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2252 states, 2251 states have (on average 1.104398045313194) internal successors, (2486), 2251 states have internal predecessors, (2486), 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) [2022-11-22 01:24:12,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2252 states to 2252 states and 2486 transitions. [2022-11-22 01:24:12,117 INFO L78 Accepts]: Start accepts. Automaton has 2252 states and 2486 transitions. Word has length 1633 [2022-11-22 01:24:12,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:24:12,118 INFO L495 AbstractCegarLoop]: Abstraction has 2252 states and 2486 transitions. [2022-11-22 01:24:12,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 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) [2022-11-22 01:24:12,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2252 states and 2486 transitions. [2022-11-22 01:24:12,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1682 [2022-11-22 01:24:12,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:24:12,143 INFO L195 NwaCegarLoop]: trace histogram [1520, 64, 16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:24:12,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-22 01:24:12,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:24:12,344 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:24:12,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:24:12,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1937700894, now seen corresponding path program 19 times [2022-11-22 01:24:12,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:24:12,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548542867] [2022-11-22 01:24:12,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:24:12,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:24:12,852 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:24:12,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1162208722] [2022-11-22 01:24:12,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:24:12,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:24:12,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:24:12,853 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:24:12,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd9b44fa-cf07-4a7c-b8fb-16c684ec6bb9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-22 01:24:17,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:24:17,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 14541 conjuncts, 193 conjunts are in the unsatisfiable core [2022-11-22 01:24:17,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:24:36,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1170168 backedges. 255382 proven. 18145 refuted. 0 times theorem prover too weak. 896641 trivial. 0 not checked. [2022-11-22 01:24:36,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:25:11,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1170168 backedges. 255382 proven. 18145 refuted. 0 times theorem prover too weak. 896641 trivial. 0 not checked. [2022-11-22 01:25:11,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:25:11,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548542867] [2022-11-22 01:25:11,534 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:25:11,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162208722] [2022-11-22 01:25:11,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162208722] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:25:11,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1334910317] [2022-11-22 01:25:11,537 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 01:25:11,537 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:25:11,537 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:25:11,537 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:25:11,537 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:25:11,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:11,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:11,607 INFO L321 Elim1Store]: treesize reduction 95, result has 28.0 percent of original size [2022-11-22 01:25:11,607 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 3 case distinctions, treesize of input 39 treesize of output 63 [2022-11-22 01:25:11,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:11,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:11,683 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:25:11,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:25:11,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:11,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-11-22 01:25:12,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:12,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:25:12,068 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-22 01:25:12,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 394 [2022-11-22 01:25:12,167 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 28 treesize of output 24 [2022-11-22 01:25:12,219 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 28 treesize of output 24 [2022-11-22 01:25:12,320 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 24 treesize of output 20 [2022-11-22 01:25:12,396 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 28 treesize of output 24 [2022-11-22 01:25:12,462 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 28 treesize of output 24 [2022-11-22 01:25:12,542 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 28 treesize of output 24 [2022-11-22 01:25:12,635 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 142 treesize of output 120 [2022-11-22 01:25:12,696 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 28 treesize of output 24 [2022-11-22 01:25:12,753 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 28 treesize of output 24 [2022-11-22 01:25:12,815 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 28 treesize of output 24 [2022-11-22 01:25:12,888 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 142 treesize of output 120 [2022-11-22 01:25:12,947 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 28 treesize of output 24 [2022-11-22 01:25:12,996 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 28 treesize of output 24 [2022-11-22 01:25:13,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:13,057 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:25:13,057 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 49 treesize of output 49 [2022-11-22 01:25:13,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:13,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:13,112 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:25:13,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2022-11-22 01:25:13,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:13,163 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:25:13,163 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 49 treesize of output 49 [2022-11-22 01:25:13,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:13,239 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:25:13,239 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 41 treesize of output 41 [2022-11-22 01:25:13,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:13,285 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:25:13,285 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 49 treesize of output 49 [2022-11-22 01:25:13,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:13,360 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:25:13,360 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 41 treesize of output 41 [2022-11-22 01:25:13,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:13,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:13,456 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-22 01:25:13,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 163 [2022-11-22 01:25:13,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:13,546 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:25:13,546 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 49 treesize of output 49 [2022-11-22 01:25:13,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:13,605 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:25:13,606 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 49 treesize of output 49 [2022-11-22 01:25:13,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:13,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:13,660 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:25:13,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2022-11-22 01:25:13,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:13,710 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:25:13,710 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 49 treesize of output 49 [2022-11-22 01:25:13,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:13,828 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:25:13,828 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 49 treesize of output 49 [2022-11-22 01:25:13,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:13,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:13,919 INFO L321 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2022-11-22 01:25:13,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 179 [2022-11-22 01:25:13,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:13,992 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:25:13,992 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 49 treesize of output 49 [2022-11-22 01:25:14,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:14,047 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:25:14,047 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 49 treesize of output 49 [2022-11-22 01:25:14,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:14,136 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:25:14,136 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 47 treesize of output 47 [2022-11-22 01:25:14,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:14,188 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:25:14,189 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 49 treesize of output 49 [2022-11-22 01:25:14,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:14,246 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:25:14,246 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 49 treesize of output 49 [2022-11-22 01:25:14,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:14,324 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-22 01:25:14,325 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 47 treesize of output 47 [2022-11-22 01:25:14,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:14,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:14,493 INFO L321 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2022-11-22 01:25:14,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 192 [2022-11-22 01:25:14,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:14,574 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:25:14,575 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 49 treesize of output 49 [2022-11-22 01:25:14,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:14,622 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:25:14,622 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 49 treesize of output 49 [2022-11-22 01:25:14,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:14,682 INFO L321 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2022-11-22 01:25:14,682 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 41 treesize of output 41 [2022-11-22 01:25:14,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:14,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:14,783 INFO L321 Elim1Store]: treesize reduction 137, result has 36.6 percent of original size [2022-11-22 01:25:14,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-11-22 01:25:14,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:25:14,848 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-22 01:25:14,848 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 1 case distinctions, treesize of input 49 treesize of output 49 [2022-11-22 01:25:14,854 INFO L180 IcfgInterpreter]: Interpretation finished