./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 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/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_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 52a248b2b2cf395cf0c12ea6447af889ed3691d7fa3d2de2504a7728d19c705b --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:48:23,493 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:48:23,497 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:48:23,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:48:23,552 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:48:23,554 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:48:23,556 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:48:23,559 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:48:23,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:48:23,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:48:23,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:48:23,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:48:23,566 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:48:23,567 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:48:23,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:48:23,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:48:23,576 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:48:23,577 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:48:23,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:48:23,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:48:23,592 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:48:23,594 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:48:23,601 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:48:23,602 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:48:23,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:48:23,606 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:48:23,607 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:48:23,608 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:48:23,609 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:48:23,610 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:48:23,610 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:48:23,611 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:48:23,612 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:48:23,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:48:23,615 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:48:23,615 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:48:23,616 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:48:23,616 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:48:23,617 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:48:23,618 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:48:23,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:48:23,620 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:48:23,650 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:48:23,653 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:48:23,653 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:48:23,654 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:48:23,659 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:48:23,659 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:48:23,660 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:48:23,660 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:48:23,660 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:48:23,660 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:48:23,660 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:48:23,660 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:48:23,661 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:48:23,661 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:48:23,661 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:48:23,661 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:48:23,661 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:48:23,662 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:48:23,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:48:23,663 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:48:23,663 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:48:23,663 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:48:23,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:48:23,663 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:48:23,664 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:48:23,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:48:23,664 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:48:23,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:48:23,664 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:48:23,665 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:48:23,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:48:23,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:48:23,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:48:23,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:48:23,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:48:23,666 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:48:23,666 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:48:23,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:48:23,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:48:23,666 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:48:23,667 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:48:23,667 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52a248b2b2cf395cf0c12ea6447af889ed3691d7fa3d2de2504a7728d19c705b [2021-11-25 19:48:23,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:48:23,944 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:48:23,947 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:48:23,948 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:48:23,949 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:48:23,950 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2021-11-25 19:48:24,038 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/data/c0937441e/24483ab56de84717b2c9976b2530e704/FLAG94af2b4b5 [2021-11-25 19:48:24,461 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:48:24,462 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2021-11-25 19:48:24,468 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/data/c0937441e/24483ab56de84717b2c9976b2530e704/FLAG94af2b4b5 [2021-11-25 19:48:24,861 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/data/c0937441e/24483ab56de84717b2c9976b2530e704 [2021-11-25 19:48:24,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:48:24,865 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:48:24,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:48:24,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:48:24,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:48:24,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:48:24" (1/1) ... [2021-11-25 19:48:24,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17278d6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:24, skipping insertion in model container [2021-11-25 19:48:24,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:48:24" (1/1) ... [2021-11-25 19:48:24,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:48:24,898 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:48:25,074 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2021-11-25 19:48:25,115 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:48:25,122 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:48:25,135 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2021-11-25 19:48:25,147 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:48:25,160 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:48:25,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:25 WrapperNode [2021-11-25 19:48:25,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:48:25,162 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:48:25,162 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:48:25,162 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:48:25,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:25" (1/1) ... [2021-11-25 19:48:25,177 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:25" (1/1) ... [2021-11-25 19:48:25,211 INFO L137 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 132 [2021-11-25 19:48:25,212 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:48:25,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:48:25,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:48:25,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:48:25,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:25" (1/1) ... [2021-11-25 19:48:25,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:25" (1/1) ... [2021-11-25 19:48:25,224 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:25" (1/1) ... [2021-11-25 19:48:25,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:25" (1/1) ... [2021-11-25 19:48:25,233 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:25" (1/1) ... [2021-11-25 19:48:25,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:25" (1/1) ... [2021-11-25 19:48:25,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:25" (1/1) ... [2021-11-25 19:48:25,248 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:48:25,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:48:25,250 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:48:25,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:48:25,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:25" (1/1) ... [2021-11-25 19:48:25,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:48:25,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:25,292 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:48:25,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:48:25,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:48:25,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:48:25,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:48:25,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:48:25,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:48:25,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:48:25,335 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:48:25,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:48:25,400 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:48:25,402 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:48:25,562 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:48:25,637 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:48:25,651 INFO L301 CfgBuilder]: Removed 12 assume(true) statements. [2021-11-25 19:48:25,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:48:25 BoogieIcfgContainer [2021-11-25 19:48:25,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:48:25,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:48:25,656 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:48:25,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:48:25,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:48:24" (1/3) ... [2021-11-25 19:48:25,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54f1bd0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:48:25, skipping insertion in model container [2021-11-25 19:48:25,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:25" (2/3) ... [2021-11-25 19:48:25,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54f1bd0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:48:25, skipping insertion in model container [2021-11-25 19:48:25,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:48:25" (3/3) ... [2021-11-25 19:48:25,673 INFO L111 eAbstractionObserver]: Analyzing ICFG copy-partial-3-u.c [2021-11-25 19:48:25,678 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:48:25,679 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:48:25,725 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:48:25,733 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:48:25,733 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:48:25,748 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) [2021-11-25 19:48:25,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 19:48:25,759 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:25,759 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:25,760 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:25,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:25,766 INFO L85 PathProgramCache]: Analyzing trace with hash 908962074, now seen corresponding path program 1 times [2021-11-25 19:48:25,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:25,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369251868] [2021-11-25 19:48:25,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:25,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:25,844 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:48:25,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [306952625] [2021-11-25 19:48:25,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:25,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:25,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:25,860 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:25,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:48:25,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:25,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:48:25,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:26,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:26,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:48:26,073 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:26,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369251868] [2021-11-25 19:48:26,074 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:48:26,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306952625] [2021-11-25 19:48:26,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306952625] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:26,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:48:26,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:48:26,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851634201] [2021-11-25 19:48:26,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:26,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:48:26,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:26,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:48:26,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:48:26,112 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) [2021-11-25 19:48:26,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:26,177 INFO L93 Difference]: Finished difference Result 35 states and 59 transitions. [2021-11-25 19:48:26,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:48:26,180 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 [2021-11-25 19:48:26,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:26,188 INFO L225 Difference]: With dead ends: 35 [2021-11-25 19:48:26,188 INFO L226 Difference]: Without dead ends: 20 [2021-11-25 19:48:26,191 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:48:26,195 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 6 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, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:26,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:48:26,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-25 19:48:26,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-11-25 19:48:26,252 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) [2021-11-25 19:48:26,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 29 transitions. [2021-11-25 19:48:26,254 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 29 transitions. Word has length 9 [2021-11-25 19:48:26,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:26,255 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 29 transitions. [2021-11-25 19:48:26,255 INFO L471 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) [2021-11-25 19:48:26,255 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 29 transitions. [2021-11-25 19:48:26,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 19:48:26,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:26,256 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:26,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:26,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-25 19:48:26,484 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:26,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:26,485 INFO L85 PathProgramCache]: Analyzing trace with hash 648526984, now seen corresponding path program 1 times [2021-11-25 19:48:26,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:26,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146670391] [2021-11-25 19:48:26,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:26,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:26,506 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:48:26,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1738632618] [2021-11-25 19:48:26,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:26,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:26,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:26,510 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:26,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:48:26,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:26,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:48:26,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:26,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:26,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:48:26,670 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:26,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146670391] [2021-11-25 19:48:26,671 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:48:26,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738632618] [2021-11-25 19:48:26,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738632618] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:26,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:48:26,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:48:26,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245045022] [2021-11-25 19:48:26,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:26,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:48:26,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:26,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:48:26,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:48:26,680 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) [2021-11-25 19:48:26,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:26,808 INFO L93 Difference]: Finished difference Result 47 states and 77 transitions. [2021-11-25 19:48:26,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:48:26,810 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 [2021-11-25 19:48:26,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:26,811 INFO L225 Difference]: With dead ends: 47 [2021-11-25 19:48:26,812 INFO L226 Difference]: Without dead ends: 31 [2021-11-25 19:48:26,812 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:48:26,814 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 52 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:26,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 9 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:48:26,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-25 19:48:26,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2021-11-25 19:48:26,826 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) [2021-11-25 19:48:26,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 31 transitions. [2021-11-25 19:48:26,827 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 31 transitions. Word has length 11 [2021-11-25 19:48:26,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:26,828 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 31 transitions. [2021-11-25 19:48:26,828 INFO L471 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) [2021-11-25 19:48:26,829 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 31 transitions. [2021-11-25 19:48:26,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 19:48:26,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:26,830 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:26,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-25 19:48:27,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:27,040 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:27,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:27,041 INFO L85 PathProgramCache]: Analyzing trace with hash -603899039, now seen corresponding path program 1 times [2021-11-25 19:48:27,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:27,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372420420] [2021-11-25 19:48:27,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:27,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:27,049 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:48:27,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674638318] [2021-11-25 19:48:27,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:27,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:27,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:27,057 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:27,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:48:27,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:27,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:48:27,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:27,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:27,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:48:27,158 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:27,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372420420] [2021-11-25 19:48:27,158 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:48:27,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674638318] [2021-11-25 19:48:27,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674638318] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:27,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:48:27,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:48:27,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599571954] [2021-11-25 19:48:27,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:27,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:48:27,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:27,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:48:27,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:48:27,162 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) [2021-11-25 19:48:27,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:27,227 INFO L93 Difference]: Finished difference Result 50 states and 79 transitions. [2021-11-25 19:48:27,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:48:27,228 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 [2021-11-25 19:48:27,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:27,229 INFO L225 Difference]: With dead ends: 50 [2021-11-25 19:48:27,229 INFO L226 Difference]: Without dead ends: 32 [2021-11-25 19:48:27,230 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:48:27,231 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 46 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:27,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 8 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:48:27,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-25 19:48:27,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2021-11-25 19:48:27,238 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) [2021-11-25 19:48:27,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2021-11-25 19:48:27,239 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 13 [2021-11-25 19:48:27,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:27,239 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions. [2021-11-25 19:48:27,240 INFO L471 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) [2021-11-25 19:48:27,240 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2021-11-25 19:48:27,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 19:48:27,241 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:27,241 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:27,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:27,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:27,468 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:27,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:27,468 INFO L85 PathProgramCache]: Analyzing trace with hash -972286329, now seen corresponding path program 1 times [2021-11-25 19:48:27,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:27,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259922696] [2021-11-25 19:48:27,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:27,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:27,476 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:48:27,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1058238079] [2021-11-25 19:48:27,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:27,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:27,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:27,496 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:27,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:48:27,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:27,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:48:27,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:27,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:27,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:48:27,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:27,702 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:27,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259922696] [2021-11-25 19:48:27,702 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:48:27,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058238079] [2021-11-25 19:48:27,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058238079] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:48:27,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1916917485] [2021-11-25 19:48:27,729 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-25 19:48:27,729 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:48:27,734 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:48:27,739 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:48:27,740 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:48:27,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:27,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:27,918 INFO L354 Elim1Store]: treesize reduction 91, result has 27.8 percent of original size [2021-11-25 19:48:27,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 treesize of output 60 [2021-11-25 19:48:27,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:27,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:28,055 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:48:28,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:28,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:28,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-25 19:48:29,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:29,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:29,188 INFO L354 Elim1Store]: treesize reduction 149, result has 18.6 percent of original size [2021-11-25 19:48:29,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 404 treesize of output 390 [2021-11-25 19:48:29,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:29,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:29,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:30,249 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:48:30,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1916917485] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:30,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:48:30,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4] total 11 [2021-11-25 19:48:30,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062260978] [2021-11-25 19:48:30,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:30,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:48:30,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:30,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:48:30,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-25 19:48:30,761 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) [2021-11-25 19:48:31,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:31,061 INFO L93 Difference]: Finished difference Result 50 states and 73 transitions. [2021-11-25 19:48:31,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:48:31,062 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 [2021-11-25 19:48:31,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:31,062 INFO L225 Difference]: With dead ends: 50 [2021-11-25 19:48:31,063 INFO L226 Difference]: Without dead ends: 35 [2021-11-25 19:48:31,063 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:48:31,064 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:31,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 6 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:48:31,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-25 19:48:31,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2021-11-25 19:48:31,080 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) [2021-11-25 19:48:31,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 36 transitions. [2021-11-25 19:48:31,086 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 36 transitions. Word has length 14 [2021-11-25 19:48:31,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:31,087 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 36 transitions. [2021-11-25 19:48:31,087 INFO L471 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) [2021-11-25 19:48:31,087 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 36 transitions. [2021-11-25 19:48:31,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 19:48:31,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:31,089 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:31,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:31,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:31,303 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:31,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:31,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1749873230, now seen corresponding path program 1 times [2021-11-25 19:48:31,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:31,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839458510] [2021-11-25 19:48:31,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:31,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:31,314 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:48:31,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1537125796] [2021-11-25 19:48:31,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:31,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:31,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:31,315 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:31,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:48:31,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:31,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:48:31,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:31,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:48:31,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:48:31,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:48:31,487 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:31,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839458510] [2021-11-25 19:48:31,488 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:48:31,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537125796] [2021-11-25 19:48:31,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537125796] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:48:31,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2044477713] [2021-11-25 19:48:31,493 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-25 19:48:31,493 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:48:31,493 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:48:31,493 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:48:31,494 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:48:31,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:31,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:31,569 INFO L354 Elim1Store]: treesize reduction 91, result has 27.8 percent of original size [2021-11-25 19:48:31,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 treesize of output 60 [2021-11-25 19:48:31,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:31,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:31,646 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:48:31,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:31,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:31,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2021-11-25 19:48:32,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:32,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:32,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:32,118 INFO L354 Elim1Store]: treesize reduction 88, result has 7.4 percent of original size [2021-11-25 19:48:32,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 412 treesize of output 388 [2021-11-25 19:48:32,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:32,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:32,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:32,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:32,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:32,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:32,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:32,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:33,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:33,034 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:33,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:33,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:33,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:33,099 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:48:33,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2021-11-25 19:48:33,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:33,159 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:33,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:33,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:33,280 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:33,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:33,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:33,336 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:33,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:33,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:33,474 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:48:33,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:48:33,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:33,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:33,596 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-25 19:48:33,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:33,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:33,684 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:33,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:33,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:33,749 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:33,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:33,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:33,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:33,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:33,811 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:48:33,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-25 19:48:33,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:33,857 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:33,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:34,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:34,027 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:48:34,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:48:34,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:34,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:34,129 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-25 19:48:34,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:34,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:34,205 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:34,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:34,212 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:48:34,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [2044477713] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:34,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:48:34,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 4] total 12 [2021-11-25 19:48:34,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360422149] [2021-11-25 19:48:34,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:34,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:48:34,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:34,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:48:34,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-25 19:48:34,826 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) [2021-11-25 19:48:35,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:35,701 INFO L93 Difference]: Finished difference Result 57 states and 86 transitions. [2021-11-25 19:48:35,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 19:48:35,702 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 [2021-11-25 19:48:35,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:35,707 INFO L225 Difference]: With dead ends: 57 [2021-11-25 19:48:35,708 INFO L226 Difference]: Without dead ends: 45 [2021-11-25 19:48:35,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-11-25 19:48:35,711 INFO L933 BasicCegarLoop]: 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 [2021-11-25 19:48:35,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 9 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:48:35,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-25 19:48:35,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 27. [2021-11-25 19:48:35,731 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) [2021-11-25 19:48:35,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2021-11-25 19:48:35,734 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 19 [2021-11-25 19:48:35,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:35,735 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2021-11-25 19:48:35,735 INFO L471 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) [2021-11-25 19:48:35,735 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2021-11-25 19:48:35,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 19:48:35,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:35,737 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:48:35,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:35,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:35,960 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:35,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:35,960 INFO L85 PathProgramCache]: Analyzing trace with hash -494766001, now seen corresponding path program 1 times [2021-11-25 19:48:35,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:35,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081304122] [2021-11-25 19:48:35,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:35,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:35,966 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:48:35,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1809338851] [2021-11-25 19:48:35,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:35,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:35,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:35,968 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:36,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:48:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:36,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:48:36,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:36,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 19:48:36,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:48:36,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 19:48:36,195 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:36,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081304122] [2021-11-25 19:48:36,196 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:48:36,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809338851] [2021-11-25 19:48:36,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809338851] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:48:36,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1604992773] [2021-11-25 19:48:36,199 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 19:48:36,199 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:48:36,199 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:48:36,199 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:48:36,199 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:48:36,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:36,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:36,300 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:48:36,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:36,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:36,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:36,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2021-11-25 19:48:36,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:36,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2021-11-25 19:48:36,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:36,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:36,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:36,703 INFO L354 Elim1Store]: treesize reduction 88, result has 7.4 percent of original size [2021-11-25 19:48:36,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 412 treesize of output 388 [2021-11-25 19:48:36,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:36,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:37,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-25 19:48:37,150 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-25 19:48:37,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2021-11-25 19:48:37,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:37,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:37,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-25 19:48:37,510 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-25 19:48:37,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2021-11-25 19:48:37,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:37,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:37,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:37,821 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:48:37,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:48:37,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:37,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:37,917 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-25 19:48:37,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:38,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:38,015 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:38,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:38,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:38,124 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:38,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:38,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:38,185 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:38,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:38,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:38,305 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:38,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:38,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:38,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:38,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:38,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:38,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:38,366 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:48:38,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2021-11-25 19:48:38,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:38,415 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:38,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:38,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:38,478 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:48:38,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:48:38,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:38,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:38,588 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-25 19:48:38,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:38,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:38,660 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:38,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:38,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:38,905 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:48:38,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:48:38,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:38,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:39,015 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-25 19:48:39,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:39,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:39,092 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:39,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:39,099 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:48:39,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1604992773] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:39,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:48:39,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4, 4] total 14 [2021-11-25 19:48:39,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339395643] [2021-11-25 19:48:39,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:39,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:48:39,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:39,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:48:39,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-11-25 19:48:39,769 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) [2021-11-25 19:48:40,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:40,465 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2021-11-25 19:48:40,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 19:48:40,466 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 [2021-11-25 19:48:40,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:40,466 INFO L225 Difference]: With dead ends: 59 [2021-11-25 19:48:40,466 INFO L226 Difference]: Without dead ends: 46 [2021-11-25 19:48:40,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2021-11-25 19:48:40,468 INFO L933 BasicCegarLoop]: 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 [2021-11-25 19:48:40,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:48:40,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-25 19:48:40,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 29. [2021-11-25 19:48:40,479 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) [2021-11-25 19:48:40,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-11-25 19:48:40,479 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 23 [2021-11-25 19:48:40,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:40,480 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-11-25 19:48:40,480 INFO L471 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) [2021-11-25 19:48:40,480 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-11-25 19:48:40,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 19:48:40,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:40,481 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:48:40,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:40,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:40,696 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:40,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:40,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1997306399, now seen corresponding path program 1 times [2021-11-25 19:48:40,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:40,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141547909] [2021-11-25 19:48:40,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:40,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:40,701 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:48:40,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [556383404] [2021-11-25 19:48:40,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:40,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:40,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:40,702 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:40,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:48:40,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:40,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:48:40,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:40,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:48:40,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:48:40,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:48:40,872 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:40,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141547909] [2021-11-25 19:48:40,873 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:48:40,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556383404] [2021-11-25 19:48:40,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556383404] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:48:40,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [293532556] [2021-11-25 19:48:40,875 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 19:48:40,875 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:48:40,875 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:48:40,876 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:48:40,876 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:48:40,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:40,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:40,958 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:48:40,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:40,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:40,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:40,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2021-11-25 19:48:41,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:41,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-25 19:48:41,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:41,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:41,312 INFO L354 Elim1Store]: treesize reduction 149, result has 18.6 percent of original size [2021-11-25 19:48:41,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 404 treesize of output 390 [2021-11-25 19:48:41,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:41,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:41,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-25 19:48:41,744 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-25 19:48:41,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2021-11-25 19:48:41,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:41,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:42,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-25 19:48:42,124 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-25 19:48:42,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2021-11-25 19:48:42,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:42,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:42,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:42,414 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:42,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:42,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:42,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:42,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:42,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:42,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:42,473 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:48:42,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2021-11-25 19:48:42,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:42,516 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:42,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:42,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:42,615 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:48:42,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:48:42,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:42,648 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:42,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:42,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:42,756 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:42,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:42,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:42,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:42,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:42,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:42,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:42,820 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:48:42,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2021-11-25 19:48:42,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:42,861 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:42,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:42,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:42,926 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:42,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:42,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:42,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:42,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:42,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:42,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:42,983 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:48:42,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-25 19:48:43,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:43,017 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:43,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:43,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:43,167 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:43,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:43,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:43,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:43,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:43,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:43,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:43,299 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:48:43,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 179 [2021-11-25 19:48:43,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:43,377 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:43,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:43,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:43,425 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:43,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:43,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:43,524 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-25 19:48:43,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-25 19:48:43,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:43,591 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:43,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:43,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:43,644 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:43,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:43,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:43,732 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-25 19:48:43,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-25 19:48:43,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:43,792 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:43,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:43,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:43,842 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:43,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:43,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:43,905 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:43,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:43,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:43,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:43,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:43,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:43,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:43,965 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:48:43,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-25 19:48:43,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:43,998 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:43,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:44,002 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:48:44,951 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~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |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_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (= |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 [2021-11-25 19:48:44,951 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:48:44,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:48:44,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-25 19:48:44,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721472840] [2021-11-25 19:48:44,951 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:48:44,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:48:44,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:44,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:48:44,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-11-25 19:48:44,953 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) [2021-11-25 19:48:45,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:45,086 INFO L93 Difference]: Finished difference Result 95 states and 135 transitions. [2021-11-25 19:48:45,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:48:45,089 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 [2021-11-25 19:48:45,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:45,090 INFO L225 Difference]: With dead ends: 95 [2021-11-25 19:48:45,090 INFO L226 Difference]: Without dead ends: 68 [2021-11-25 19:48:45,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-11-25 19:48:45,091 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 110 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:45,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 14 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:48:45,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-25 19:48:45,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 41. [2021-11-25 19:48:45,106 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) [2021-11-25 19:48:45,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2021-11-25 19:48:45,106 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 24 [2021-11-25 19:48:45,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:45,107 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2021-11-25 19:48:45,107 INFO L471 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) [2021-11-25 19:48:45,107 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2021-11-25 19:48:45,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-25 19:48:45,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:45,108 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:48:45,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:45,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 19:48:45,308 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:45,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:45,309 INFO L85 PathProgramCache]: Analyzing trace with hash 321559483, now seen corresponding path program 2 times [2021-11-25 19:48:45,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:45,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592515843] [2021-11-25 19:48:45,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:45,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:45,319 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:48:45,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351960725] [2021-11-25 19:48:45,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:48:45,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:45,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:45,336 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:45,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 19:48:45,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 19:48:45,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:48:45,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:48:45,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-25 19:48:45,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:48:45,574 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-25 19:48:45,574 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:45,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592515843] [2021-11-25 19:48:45,574 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:48:45,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351960725] [2021-11-25 19:48:45,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351960725] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:48:45,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [999926955] [2021-11-25 19:48:45,578 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 19:48:45,578 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:48:45,579 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:48:45,579 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:48:45,579 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:48:45,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:45,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:45,642 INFO L354 Elim1Store]: treesize reduction 91, result has 27.8 percent of original size [2021-11-25 19:48:45,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 treesize of output 60 [2021-11-25 19:48:45,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:45,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:45,706 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:48:45,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:45,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:45,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2021-11-25 19:48:46,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:46,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:46,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:46,048 INFO L354 Elim1Store]: treesize reduction 88, result has 7.4 percent of original size [2021-11-25 19:48:46,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 412 treesize of output 388 [2021-11-25 19:48:46,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:46,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:46,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:46,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:46,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:46,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-25 19:48:46,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:46,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:46,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:46,799 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:46,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:46,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:46,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:46,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:46,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:46,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:46,859 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:48:46,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2021-11-25 19:48:46,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:46,908 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:46,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:46,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:46,983 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:46,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:47,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:47,045 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:47,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:47,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:47,138 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:47,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:47,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:47,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:47,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:47,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:47,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:47,206 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:48:47,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2021-11-25 19:48:47,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:47,240 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:47,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:47,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:47,285 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:47,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:47,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:47,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:47,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:47,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:47,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:47,352 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:48:47,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-25 19:48:47,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:47,399 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:47,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:47,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:47,553 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:47,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:47,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:47,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:47,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:47,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:47,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:47,659 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:48:47,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 179 [2021-11-25 19:48:47,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:47,720 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:47,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:47,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:47,779 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:47,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:47,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:47,871 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:47,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:47,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:47,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:47,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:47,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:47,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:47,991 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:48:47,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2021-11-25 19:48:48,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:48,047 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:48,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:48,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:48,097 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:48,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:48,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:48,181 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:48,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:48,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:48,229 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:48,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:48,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:48,278 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:48,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:48,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:48,355 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:48,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:48,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:48,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:48,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:48,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:48,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:48,406 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:48:48,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-25 19:48:48,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:48,449 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:48,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:48,454 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:48:49,405 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~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |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_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (= |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 [2021-11-25 19:48:49,405 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:48:49,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:48:49,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-25 19:48:49,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536102870] [2021-11-25 19:48:49,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:48:49,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:48:49,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:49,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:48:49,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-11-25 19:48:49,407 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) [2021-11-25 19:48:49,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:49,587 INFO L93 Difference]: Finished difference Result 162 states and 220 transitions. [2021-11-25 19:48:49,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:48:49,587 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 [2021-11-25 19:48:49,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:49,589 INFO L225 Difference]: With dead ends: 162 [2021-11-25 19:48:49,589 INFO L226 Difference]: Without dead ends: 131 [2021-11-25 19:48:49,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-11-25 19:48:49,591 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 136 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:49,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 16 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:48:49,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-25 19:48:49,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 76. [2021-11-25 19:48:49,617 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) [2021-11-25 19:48:49,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 102 transitions. [2021-11-25 19:48:49,618 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 102 transitions. Word has length 27 [2021-11-25 19:48:49,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:49,619 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 102 transitions. [2021-11-25 19:48:49,619 INFO L471 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) [2021-11-25 19:48:49,619 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 102 transitions. [2021-11-25 19:48:49,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-25 19:48:49,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:49,621 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:48:49,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:49,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:49,848 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:49,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:49,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1772377171, now seen corresponding path program 3 times [2021-11-25 19:48:49,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:49,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221286657] [2021-11-25 19:48:49,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:49,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:49,865 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:48:49,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1143855196] [2021-11-25 19:48:49,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:48:49,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:49,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:49,867 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:49,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 19:48:49,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:48:49,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:48:49,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:48:49,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:50,094 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 8 proven. 89 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-11-25 19:48:50,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:48:50,249 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 8 proven. 89 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-11-25 19:48:50,249 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:50,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221286657] [2021-11-25 19:48:50,249 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:48:50,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143855196] [2021-11-25 19:48:50,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143855196] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:48:50,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [986687189] [2021-11-25 19:48:50,252 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 19:48:50,252 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:48:50,253 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:48:50,253 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:48:50,253 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:48:50,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:50,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:50,324 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:48:50,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:50,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:50,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:50,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2021-11-25 19:48:50,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:50,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-25 19:48:50,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:50,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:50,697 INFO L354 Elim1Store]: treesize reduction 149, result has 18.6 percent of original size [2021-11-25 19:48:50,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 404 treesize of output 390 [2021-11-25 19:48:50,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:50,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:50,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-25 19:48:51,107 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-25 19:48:51,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2021-11-25 19:48:51,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:51,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:51,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-25 19:48:51,610 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-25 19:48:51,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2021-11-25 19:48:51,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:51,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:51,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:51,866 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:51,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:51,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:51,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:51,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:51,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:51,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:51,938 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:48:51,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2021-11-25 19:48:51,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:51,979 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:51,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:52,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:52,092 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:52,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:52,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:52,139 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:52,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:52,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:52,224 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:48:52,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:48:52,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:52,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:52,310 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-25 19:48:52,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:52,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:52,368 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:52,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:52,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:52,415 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:48:52,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:48:52,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:52,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:52,524 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-25 19:48:52,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:52,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:52,597 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:52,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:52,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:52,754 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-25 19:48:52,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-25 19:48:52,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:52,810 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:52,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:52,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:52,860 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:52,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:52,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:52,943 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:52,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:52,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:52,981 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:52,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:53,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:53,023 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:53,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:53,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:53,090 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:53,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:53,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:53,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:53,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:53,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:53,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:53,183 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:48:53,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2021-11-25 19:48:53,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:53,270 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:53,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:53,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:53,320 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:53,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:53,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:53,389 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:48:53,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:48:53,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:53,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:53,517 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-25 19:48:53,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:53,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:53,585 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:53,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:53,592 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:48:55,060 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~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |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_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (= |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 [2021-11-25 19:48:55,061 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:48:55,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:48:55,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-11-25 19:48:55,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153421490] [2021-11-25 19:48:55,062 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:48:55,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 19:48:55,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:55,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 19:48:55,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-11-25 19:48:55,063 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) [2021-11-25 19:48:55,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:55,346 INFO L93 Difference]: Finished difference Result 260 states and 355 transitions. [2021-11-25 19:48:55,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 19:48:55,347 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 [2021-11-25 19:48:55,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:55,349 INFO L225 Difference]: With dead ends: 260 [2021-11-25 19:48:55,349 INFO L226 Difference]: Without dead ends: 178 [2021-11-25 19:48:55,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 146 SyntacticMatches, 22 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2021-11-25 19:48:55,351 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 75 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:55,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 51 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:48:55,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-25 19:48:55,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 100. [2021-11-25 19:48:55,384 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) [2021-11-25 19:48:55,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 130 transitions. [2021-11-25 19:48:55,385 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 130 transitions. Word has length 63 [2021-11-25 19:48:55,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:55,386 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 130 transitions. [2021-11-25 19:48:55,386 INFO L471 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) [2021-11-25 19:48:55,386 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 130 transitions. [2021-11-25 19:48:55,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-25 19:48:55,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:55,388 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:48:55,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:55,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:55,591 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:55,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:55,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1481494967, now seen corresponding path program 4 times [2021-11-25 19:48:55,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:55,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121129628] [2021-11-25 19:48:55,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:55,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:55,612 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:48:55,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430262967] [2021-11-25 19:48:55,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:48:55,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:55,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:55,640 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:55,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 19:48:55,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:55,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:48:55,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:55,904 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 190 proven. 10 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2021-11-25 19:48:55,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:48:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 190 proven. 10 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2021-11-25 19:48:56,062 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:56,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121129628] [2021-11-25 19:48:56,062 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:48:56,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430262967] [2021-11-25 19:48:56,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430262967] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:48:56,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1802609782] [2021-11-25 19:48:56,065 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 19:48:56,065 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:48:56,065 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:48:56,065 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:48:56,066 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:48:56,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,147 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:48:56,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:56,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2021-11-25 19:48:56,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-25 19:48:56,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:56,471 INFO L354 Elim1Store]: treesize reduction 149, result has 18.6 percent of original size [2021-11-25 19:48:56,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 404 treesize of output 390 [2021-11-25 19:48:56,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:56,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:56,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:56,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 120 [2021-11-25 19:48:56,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:57,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:57,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:57,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 120 [2021-11-25 19:48:57,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:57,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:48:57,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:57,375 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:57,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:57,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:57,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:57,426 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:48:57,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2021-11-25 19:48:57,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:57,462 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:57,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:57,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:57,559 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:57,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:57,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:57,604 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:57,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:57,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:57,690 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:48:57,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:48:57,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:57,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:57,790 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-25 19:48:57,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:57,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:57,848 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:57,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:57,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:57,892 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:57,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:57,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:57,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:57,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:57,947 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:48:57,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-25 19:48:57,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:57,980 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:57,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:58,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:58,083 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-25 19:48:58,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-25 19:48:58,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:58,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:58,223 INFO L354 Elim1Store]: treesize reduction 300, result has 25.4 percent of original size [2021-11-25 19:48:58,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:58,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:58,298 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:58,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:58,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:58,361 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:58,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:58,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:58,455 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-25 19:48:58,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-25 19:48:58,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:58,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:58,634 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-25 19:48:58,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:58,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:58,711 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:58,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:58,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:58,761 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:58,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:58,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:58,853 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-25 19:48:58,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-25 19:48:58,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:58,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:59,050 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-25 19:48:59,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:59,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:59,131 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:59,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:59,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:59,182 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:59,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:59,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:59,244 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:48:59,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:48:59,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:59,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:59,342 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-25 19:48:59,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:59,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:59,396 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:48:59,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:48:59,402 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:49:00,490 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~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |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_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (= |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 [2021-11-25 19:49:00,490 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:49:00,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:49:00,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-25 19:49:00,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139533105] [2021-11-25 19:49:00,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:49:00,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 19:49:00,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:49:00,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 19:49:00,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2021-11-25 19:49:00,493 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) [2021-11-25 19:49:00,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:00,809 INFO L93 Difference]: Finished difference Result 327 states and 467 transitions. [2021-11-25 19:49:00,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 19:49:00,809 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 [2021-11-25 19:49:00,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:00,811 INFO L225 Difference]: With dead ends: 327 [2021-11-25 19:49:00,811 INFO L226 Difference]: Without dead ends: 235 [2021-11-25 19:49:00,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 234 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=273, Invalid=597, Unknown=0, NotChecked=0, Total=870 [2021-11-25 19:49:00,813 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 188 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:00,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 32 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:49:00,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-11-25 19:49:00,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 166. [2021-11-25 19:49:00,871 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) [2021-11-25 19:49:00,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 202 transitions. [2021-11-25 19:49:00,873 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 202 transitions. Word has length 87 [2021-11-25 19:49:00,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:00,874 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 202 transitions. [2021-11-25 19:49:00,874 INFO L471 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) [2021-11-25 19:49:00,874 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 202 transitions. [2021-11-25 19:49:00,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-25 19:49:00,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:00,879 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:49:00,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 19:49:01,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 19:49:01,083 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:49:01,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:01,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1651562313, now seen corresponding path program 5 times [2021-11-25 19:49:01,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:49:01,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233202734] [2021-11-25 19:49:01,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:01,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:49:01,110 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:49:01,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1728110348] [2021-11-25 19:49:01,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:49:01,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:01,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:49:01,111 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:49:01,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 19:49:01,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 19:49:01,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:49:01,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:49:01,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:01,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3955 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3954 trivial. 0 not checked. [2021-11-25 19:49:01,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:49:01,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3955 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3954 trivial. 0 not checked. [2021-11-25 19:49:01,681 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:49:01,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233202734] [2021-11-25 19:49:01,681 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:49:01,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728110348] [2021-11-25 19:49:01,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728110348] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:49:01,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [836237554] [2021-11-25 19:49:01,684 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 19:49:01,684 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:49:01,684 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:49:01,685 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:49:01,685 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:49:01,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:01,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:01,749 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:49:01,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:01,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:01,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:01,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2021-11-25 19:49:01,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:01,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2021-11-25 19:49:01,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:01,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:01,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:01,996 INFO L354 Elim1Store]: treesize reduction 88, result has 7.4 percent of original size [2021-11-25 19:49:01,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 412 treesize of output 388 [2021-11-25 19:49:02,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:02,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:02,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:02,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:02,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 120 [2021-11-25 19:49:02,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:02,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:02,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:02,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:02,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 120 [2021-11-25 19:49:02,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:02,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:02,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:02,751 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:02,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:02,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:02,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:02,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:02,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:02,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:02,799 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:49:02,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2021-11-25 19:49:02,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:02,832 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:02,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:02,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:02,906 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:02,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:02,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:02,944 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:02,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:03,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:03,027 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:03,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:03,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:03,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:03,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:03,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:03,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:03,071 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:49:03,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2021-11-25 19:49:03,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:03,119 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:03,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:03,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:03,163 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:03,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:03,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:03,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:03,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:03,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:03,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:03,207 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:49:03,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-25 19:49:03,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:03,243 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:03,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:03,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:03,366 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:03,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:03,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:03,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:03,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:03,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:03,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:03,461 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:49:03,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 179 [2021-11-25 19:49:03,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:03,511 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:03,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:03,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:03,550 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:03,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:03,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:03,618 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:03,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:03,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:03,654 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:03,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:03,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:03,691 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:03,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:03,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:03,759 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:03,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:03,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:03,794 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:03,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:03,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:03,832 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:03,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:03,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:03,891 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:49:03,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:49:03,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:03,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:03,982 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-25 19:49:03,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:04,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:04,024 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:04,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:04,030 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:49:05,114 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5716#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |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_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (= |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 [2021-11-25 19:49:05,114 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:49:05,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:49:05,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-25 19:49:05,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043023608] [2021-11-25 19:49:05,115 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:49:05,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:49:05,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:49:05,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:49:05,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-11-25 19:49:05,116 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) [2021-11-25 19:49:05,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:05,278 INFO L93 Difference]: Finished difference Result 398 states and 510 transitions. [2021-11-25 19:49:05,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:49:05,278 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 [2021-11-25 19:49:05,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:05,281 INFO L225 Difference]: With dead ends: 398 [2021-11-25 19:49:05,281 INFO L226 Difference]: Without dead ends: 344 [2021-11-25 19:49:05,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 384 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-11-25 19:49:05,283 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 246 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:05,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 31 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:49:05,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-25 19:49:05,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 175. [2021-11-25 19:49:05,327 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) [2021-11-25 19:49:05,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 217 transitions. [2021-11-25 19:49:05,328 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 217 transitions. Word has length 135 [2021-11-25 19:49:05,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:05,329 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 217 transitions. [2021-11-25 19:49:05,329 INFO L471 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) [2021-11-25 19:49:05,329 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 217 transitions. [2021-11-25 19:49:05,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-25 19:49:05,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:05,332 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:49:05,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 19:49:05,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:05,555 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:49:05,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:05,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1487790265, now seen corresponding path program 6 times [2021-11-25 19:49:05,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:49:05,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805581692] [2021-11-25 19:49:05,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:05,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:49:05,577 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:49:05,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574989451] [2021-11-25 19:49:05,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:49:05,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:05,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:49:05,578 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:49:05,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 19:49:05,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:49:05,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:49:05,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:49:05,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:05,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3973 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 3941 trivial. 0 not checked. [2021-11-25 19:49:05,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:49:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3973 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 3941 trivial. 0 not checked. [2021-11-25 19:49:06,041 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:49:06,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805581692] [2021-11-25 19:49:06,041 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:49:06,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574989451] [2021-11-25 19:49:06,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574989451] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:49:06,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1309971530] [2021-11-25 19:49:06,044 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 19:49:06,044 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:49:06,044 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:49:06,044 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:49:06,045 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:49:06,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:06,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:06,102 INFO L354 Elim1Store]: treesize reduction 91, result has 27.8 percent of original size [2021-11-25 19:49:06,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 treesize of output 60 [2021-11-25 19:49:06,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:06,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:06,195 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:49:06,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:06,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:06,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-25 19:49:06,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:06,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:06,511 INFO L354 Elim1Store]: treesize reduction 149, result has 18.6 percent of original size [2021-11-25 19:49:06,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 404 treesize of output 390 [2021-11-25 19:49:06,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:06,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:06,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-25 19:49:06,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:06,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:07,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-25 19:49:07,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:07,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:07,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:07,247 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:07,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:07,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:07,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:07,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:07,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:07,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:07,297 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:49:07,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2021-11-25 19:49:07,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:07,333 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:07,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:07,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:07,420 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:07,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:07,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:07,451 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:07,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:07,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:07,533 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:07,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:07,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:07,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:07,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:07,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:07,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:07,581 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:49:07,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2021-11-25 19:49:07,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:07,617 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:07,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:07,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:07,670 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:49:07,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:49:07,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:07,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:07,755 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-25 19:49:07,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:07,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:07,806 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:07,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:07,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:07,921 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:07,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:07,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:07,954 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:07,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:07,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:07,991 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:07,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:08,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:08,068 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-25 19:49:08,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-25 19:49:08,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:08,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:08,216 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-25 19:49:08,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:08,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:08,285 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:08,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:08,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:08,325 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:08,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:08,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:08,388 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-25 19:49:08,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-25 19:49:08,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:08,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:08,549 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-25 19:49:08,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:08,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:08,617 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:08,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:08,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:08,657 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:08,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:08,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:08,713 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:49:08,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-25 19:49:08,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:08,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:08,789 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-25 19:49:08,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:08,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:08,845 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:08,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:08,848 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:49:09,811 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7636#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |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_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (= |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 [2021-11-25 19:49:09,812 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:49:09,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:49:09,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-11-25 19:49:09,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256361790] [2021-11-25 19:49:09,812 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:49:09,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:49:09,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:49:09,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:49:09,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-11-25 19:49:09,813 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) [2021-11-25 19:49:09,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:09,962 INFO L93 Difference]: Finished difference Result 293 states and 386 transitions. [2021-11-25 19:49:09,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 19:49:09,963 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 [2021-11-25 19:49:09,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:09,964 INFO L225 Difference]: With dead ends: 293 [2021-11-25 19:49:09,965 INFO L226 Difference]: Without dead ends: 234 [2021-11-25 19:49:09,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 402 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-11-25 19:49:09,965 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:09,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 21 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:49:09,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-25 19:49:10,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 181. [2021-11-25 19:49:10,018 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) [2021-11-25 19:49:10,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 226 transitions. [2021-11-25 19:49:10,019 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 226 transitions. Word has length 141 [2021-11-25 19:49:10,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:10,019 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 226 transitions. [2021-11-25 19:49:10,020 INFO L471 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) [2021-11-25 19:49:10,020 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 226 transitions. [2021-11-25 19:49:10,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-25 19:49:10,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:10,021 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:49:10,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 19:49:10,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:10,222 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:49:10,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:10,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1632527579, now seen corresponding path program 7 times [2021-11-25 19:49:10,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:49:10,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45204127] [2021-11-25 19:49:10,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:10,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:49:10,250 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:49:10,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1704876037] [2021-11-25 19:49:10,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:49:10,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:10,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:49:10,251 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:49:10,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 19:49:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:10,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 1015 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:49:10,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3984 backedges. 862 proven. 55 refuted. 0 times theorem prover too weak. 3067 trivial. 0 not checked. [2021-11-25 19:49:10,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:49:11,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3984 backedges. 862 proven. 55 refuted. 0 times theorem prover too weak. 3067 trivial. 0 not checked. [2021-11-25 19:49:11,204 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:49:11,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45204127] [2021-11-25 19:49:11,204 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:49:11,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704876037] [2021-11-25 19:49:11,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704876037] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:49:11,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [890432778] [2021-11-25 19:49:11,207 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 19:49:11,207 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:49:11,207 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:49:11,207 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:49:11,208 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:49:11,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:11,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:11,281 INFO L354 Elim1Store]: treesize reduction 91, result has 27.8 percent of original size [2021-11-25 19:49:11,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 treesize of output 60 [2021-11-25 19:49:11,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:11,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:11,349 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:49:11,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:11,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:11,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2021-11-25 19:49:11,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:11,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:11,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:11,651 INFO L354 Elim1Store]: treesize reduction 88, result has 7.4 percent of original size [2021-11-25 19:49:11,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 412 treesize of output 388 [2021-11-25 19:49:11,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:11,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:11,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:11,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:11,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:12,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-25 19:49:12,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:12,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:12,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:12,253 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:49:12,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:49:12,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:12,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:12,341 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-25 19:49:12,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:12,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:12,401 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:12,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:12,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:12,473 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:12,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:12,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:12,518 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:12,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:12,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:12,616 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:12,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:12,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:12,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:12,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:12,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:12,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:12,666 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:49:12,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2021-11-25 19:49:12,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:12,705 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:12,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:12,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:12,753 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:12,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:12,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:12,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:12,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:12,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:12,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:12,804 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:49:12,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-25 19:49:12,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:12,841 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:12,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:12,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:12,942 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:12,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:12,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:13,003 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:13,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:13,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:13,040 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:13,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:13,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:13,110 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-25 19:49:13,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-25 19:49:13,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:13,145 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:13,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:13,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:13,182 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:13,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:13,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:13,247 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:13,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:13,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:13,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:13,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:13,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:13,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:13,333 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:49:13,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2021-11-25 19:49:13,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:13,385 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:13,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:13,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:13,420 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:13,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:13,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:13,478 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:49:13,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:49:13,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:13,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:13,583 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-25 19:49:13,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:13,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:13,640 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:13,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:13,643 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:49:14,671 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9429#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |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_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (= |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 [2021-11-25 19:49:14,671 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:49:14,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:49:14,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-11-25 19:49:14,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761182373] [2021-11-25 19:49:14,672 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:49:14,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-25 19:49:14,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:49:14,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-25 19:49:14,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=823, Unknown=0, NotChecked=0, Total=1260 [2021-11-25 19:49:14,673 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) [2021-11-25 19:49:15,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:15,691 INFO L93 Difference]: Finished difference Result 831 states and 1217 transitions. [2021-11-25 19:49:15,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-25 19:49:15,692 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 [2021-11-25 19:49:15,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:15,696 INFO L225 Difference]: With dead ends: 831 [2021-11-25 19:49:15,696 INFO L226 Difference]: Without dead ends: 664 [2021-11-25 19:49:15,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 386 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=756, Invalid=1406, Unknown=0, NotChecked=0, Total=2162 [2021-11-25 19:49:15,700 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 906 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 654 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:15,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [906 Valid, 68 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [654 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 19:49:15,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-11-25 19:49:15,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 313. [2021-11-25 19:49:15,801 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) [2021-11-25 19:49:15,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 370 transitions. [2021-11-25 19:49:15,802 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 370 transitions. Word has length 143 [2021-11-25 19:49:15,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:15,803 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 370 transitions. [2021-11-25 19:49:15,803 INFO L471 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) [2021-11-25 19:49:15,803 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 370 transitions. [2021-11-25 19:49:15,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-11-25 19:49:15,806 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:15,806 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:49:15,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 19:49:16,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 19:49:16,031 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:49:16,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:16,032 INFO L85 PathProgramCache]: Analyzing trace with hash -398489307, now seen corresponding path program 8 times [2021-11-25 19:49:16,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:49:16,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340308503] [2021-11-25 19:49:16,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:16,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:49:16,077 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:49:16,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1106637931] [2021-11-25 19:49:16,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:49:16,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:16,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:49:16,082 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:49:16,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 19:49:16,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 19:49:16,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:49:16,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:49:16,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:16,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16992 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16984 trivial. 0 not checked. [2021-11-25 19:49:16,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:49:16,630 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:49:16,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340308503] [2021-11-25 19:49:16,630 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:49:16,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106637931] [2021-11-25 19:49:16,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106637931] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:49:16,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:49:16,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:49:16,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655223909] [2021-11-25 19:49:16,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:49:16,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:49:16,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:49:16,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:49:16,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:49:16,632 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) [2021-11-25 19:49:16,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:16,771 INFO L93 Difference]: Finished difference Result 493 states and 619 transitions. [2021-11-25 19:49:16,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:49:16,772 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 [2021-11-25 19:49:16,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:16,775 INFO L225 Difference]: With dead ends: 493 [2021-11-25 19:49:16,775 INFO L226 Difference]: Without dead ends: 390 [2021-11-25 19:49:16,776 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:49:16,777 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:16,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 11 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:49:16,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-25 19:49:16,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 316. [2021-11-25 19:49:16,861 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) [2021-11-25 19:49:16,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 373 transitions. [2021-11-25 19:49:16,863 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 373 transitions. Word has length 239 [2021-11-25 19:49:16,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:16,863 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 373 transitions. [2021-11-25 19:49:16,863 INFO L471 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) [2021-11-25 19:49:16,863 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 373 transitions. [2021-11-25 19:49:16,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-11-25 19:49:16,866 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:16,866 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:49:16,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 19:49:17,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:17,091 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:49:17,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:17,092 INFO L85 PathProgramCache]: Analyzing trace with hash -442724687, now seen corresponding path program 9 times [2021-11-25 19:49:17,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:49:17,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891061090] [2021-11-25 19:49:17,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:17,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:49:17,138 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:49:17,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [221422154] [2021-11-25 19:49:17,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:49:17,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:17,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:49:17,156 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:49:17,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 19:49:17,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:49:17,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:49:17,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:49:17,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:17,744 INFO L134 CoverageAnalysis]: Checked inductivity of 17019 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 16992 trivial. 0 not checked. [2021-11-25 19:49:17,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:49:18,022 INFO L134 CoverageAnalysis]: Checked inductivity of 17019 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 16992 trivial. 0 not checked. [2021-11-25 19:49:18,022 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:49:18,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891061090] [2021-11-25 19:49:18,022 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:49:18,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221422154] [2021-11-25 19:49:18,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221422154] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:49:18,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [156719840] [2021-11-25 19:49:18,025 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 19:49:18,025 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:49:18,025 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:49:18,026 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:49:18,026 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:49:18,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:18,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:18,092 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:49:18,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:18,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:18,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:18,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2021-11-25 19:49:18,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:18,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2021-11-25 19:49:18,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:18,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:18,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:18,339 INFO L354 Elim1Store]: treesize reduction 88, result has 7.4 percent of original size [2021-11-25 19:49:18,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 412 treesize of output 388 [2021-11-25 19:49:18,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:18,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:18,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-25 19:49:18,676 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-25 19:49:18,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2021-11-25 19:49:18,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:18,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:18,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-25 19:49:19,008 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-25 19:49:19,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2021-11-25 19:49:19,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:19,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:19,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:19,222 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:19,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:19,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:19,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:19,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:19,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:19,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:19,272 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:49:19,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2021-11-25 19:49:19,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:19,312 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:19,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:19,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:19,382 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:49:19,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:49:19,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:19,418 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:19,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:19,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:19,509 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:19,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:19,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:19,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:19,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:19,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:19,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:19,555 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:49:19,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2021-11-25 19:49:19,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:19,588 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:19,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:19,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:19,636 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:19,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:19,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:19,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:19,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:19,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:19,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:19,680 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:49:19,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-25 19:49:19,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:19,733 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:19,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:19,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:19,855 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-25 19:49:19,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-25 19:49:19,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:19,896 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:19,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:19,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:19,939 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:19,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:20,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:20,023 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-25 19:49:20,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-25 19:49:20,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:20,062 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:20,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:20,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:20,097 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:20,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:20,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:20,165 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:20,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:20,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:20,202 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:20,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:20,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:20,240 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:20,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:20,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:20,299 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:20,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:20,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:20,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:20,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:20,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:20,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:20,350 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:49:20,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-25 19:49:20,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:20,385 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:20,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:20,390 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:49:23,978 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15358#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |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_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (= |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 [2021-11-25 19:49:23,978 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:49:23,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:49:23,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-25 19:49:23,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353164387] [2021-11-25 19:49:23,979 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:49:23,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 19:49:23,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:49:23,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 19:49:23,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-11-25 19:49:23,980 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) [2021-11-25 19:49:24,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:24,262 INFO L93 Difference]: Finished difference Result 493 states and 641 transitions. [2021-11-25 19:49:24,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 19:49:24,263 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 [2021-11-25 19:49:24,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:24,266 INFO L225 Difference]: With dead ends: 493 [2021-11-25 19:49:24,266 INFO L226 Difference]: Without dead ends: 358 [2021-11-25 19:49:24,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 741 GetRequests, 528 SyntacticMatches, 186 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=197, Invalid=615, Unknown=0, NotChecked=0, Total=812 [2021-11-25 19:49:24,267 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 48 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:24,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 25 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:49:24,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-11-25 19:49:24,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 326. [2021-11-25 19:49:24,353 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) [2021-11-25 19:49:24,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 387 transitions. [2021-11-25 19:49:24,354 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 387 transitions. Word has length 245 [2021-11-25 19:49:24,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:24,355 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 387 transitions. [2021-11-25 19:49:24,355 INFO L471 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) [2021-11-25 19:49:24,355 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 387 transitions. [2021-11-25 19:49:24,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-25 19:49:24,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:24,359 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:49:24,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-25 19:49:24,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 19:49:24,587 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:49:24,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:24,588 INFO L85 PathProgramCache]: Analyzing trace with hash -706577498, now seen corresponding path program 10 times [2021-11-25 19:49:24,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:49:24,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531725860] [2021-11-25 19:49:24,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:24,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:49:24,642 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:49:24,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [874035838] [2021-11-25 19:49:24,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:49:24,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:24,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:49:24,651 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:49:24,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-25 19:49:25,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:25,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 1932 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 19:49:25,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:25,745 INFO L134 CoverageAnalysis]: Checked inductivity of 17054 backedges. 3718 proven. 253 refuted. 0 times theorem prover too weak. 13083 trivial. 0 not checked. [2021-11-25 19:49:25,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:49:26,770 INFO L134 CoverageAnalysis]: Checked inductivity of 17054 backedges. 3718 proven. 253 refuted. 0 times theorem prover too weak. 13083 trivial. 0 not checked. [2021-11-25 19:49:26,771 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:49:26,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531725860] [2021-11-25 19:49:26,771 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:49:26,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874035838] [2021-11-25 19:49:26,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874035838] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:49:26,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1716744426] [2021-11-25 19:49:26,773 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 19:49:26,773 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:49:26,774 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:49:26,774 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:49:26,774 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:49:26,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:26,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:26,854 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:49:26,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:26,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:26,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:26,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2021-11-25 19:49:26,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:26,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-25 19:49:27,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:27,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:27,216 INFO L354 Elim1Store]: treesize reduction 149, result has 18.6 percent of original size [2021-11-25 19:49:27,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 404 treesize of output 390 [2021-11-25 19:49:27,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:27,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:27,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:27,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:27,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 120 [2021-11-25 19:49:27,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:27,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:27,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:27,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:27,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 120 [2021-11-25 19:49:27,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:27,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:27,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:27,904 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:27,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:27,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:27,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:27,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:27,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:27,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:27,952 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:49:27,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2021-11-25 19:49:27,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:27,988 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:27,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:28,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:28,063 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:49:28,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:49:28,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:28,092 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:28,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:28,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:28,170 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:28,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:28,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:28,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:28,228 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:49:28,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2021-11-25 19:49:28,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:28,277 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:28,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:28,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:28,355 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:49:28,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:49:28,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:28,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:28,438 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-25 19:49:28,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:28,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:28,497 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:28,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:28,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:28,642 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-25 19:49:28,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-25 19:49:28,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:28,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:28,777 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-25 19:49:28,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:28,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:28,847 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:28,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:28,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:28,888 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:28,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:28,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:28,956 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:28,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:28,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:28,992 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:28,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:29,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:29,031 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:29,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:29,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:29,120 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-25 19:49:29,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-25 19:49:29,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:29,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:29,284 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-25 19:49:29,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:29,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:29,381 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:29,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:29,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:29,434 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:29,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:29,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:29,509 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:49:29,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:49:29,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:29,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:29,633 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-25 19:49:29,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:29,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:29,691 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:29,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:29,699 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:49:31,038 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18488#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |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_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (= |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 [2021-11-25 19:49:31,038 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:49:31,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:49:31,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2021-11-25 19:49:31,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566060192] [2021-11-25 19:49:31,043 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:49:31,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-25 19:49:31,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:49:31,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-25 19:49:31,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1394, Invalid=2266, Unknown=0, NotChecked=0, Total=3660 [2021-11-25 19:49:31,048 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) [2021-11-25 19:49:34,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:34,339 INFO L93 Difference]: Finished difference Result 1739 states and 2543 transitions. [2021-11-25 19:49:34,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-25 19:49:34,340 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 [2021-11-25 19:49:34,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:34,348 INFO L225 Difference]: With dead ends: 1739 [2021-11-25 19:49:34,348 INFO L226 Difference]: Without dead ends: 1439 [2021-11-25 19:49:34,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 687 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2433 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2613, Invalid=4359, Unknown=0, NotChecked=0, Total=6972 [2021-11-25 19:49:34,352 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 1891 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 1543 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1891 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1543 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:34,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1891 Valid, 140 Invalid, 1961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1543 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-25 19:49:34,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2021-11-25 19:49:34,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 590. [2021-11-25 19:49:34,536 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) [2021-11-25 19:49:34,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 675 transitions. [2021-11-25 19:49:34,538 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 675 transitions. Word has length 250 [2021-11-25 19:49:34,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:34,538 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 675 transitions. [2021-11-25 19:49:34,538 INFO L471 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) [2021-11-25 19:49:34,538 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 675 transitions. [2021-11-25 19:49:34,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-11-25 19:49:34,540 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:34,540 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:49:34,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-25 19:49:34,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 19:49:34,741 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:49:34,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:34,741 INFO L85 PathProgramCache]: Analyzing trace with hash -612360282, now seen corresponding path program 11 times [2021-11-25 19:49:34,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:49:34,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095379367] [2021-11-25 19:49:34,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:34,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:49:34,837 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:49:34,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [244130949] [2021-11-25 19:49:34,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:49:34,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:34,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:49:34,841 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:49:34,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-25 19:49:35,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 19:49:35,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:49:35,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:49:35,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:35,873 INFO L134 CoverageAnalysis]: Checked inductivity of 70718 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 70698 trivial. 0 not checked. [2021-11-25 19:49:35,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:49:35,874 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:49:35,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095379367] [2021-11-25 19:49:35,874 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:49:35,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244130949] [2021-11-25 19:49:35,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244130949] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:49:35,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:49:35,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:49:35,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083596519] [2021-11-25 19:49:35,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:49:35,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:49:35,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:49:35,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:49:35,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:49:35,877 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) [2021-11-25 19:49:36,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:36,141 INFO L93 Difference]: Finished difference Result 765 states and 911 transitions. [2021-11-25 19:49:36,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:49:36,142 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 [2021-11-25 19:49:36,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:36,146 INFO L225 Difference]: With dead ends: 765 [2021-11-25 19:49:36,146 INFO L226 Difference]: Without dead ends: 594 [2021-11-25 19:49:36,147 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:49:36,157 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:36,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 11 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:49:36,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-11-25 19:49:36,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 591. [2021-11-25 19:49:36,352 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) [2021-11-25 19:49:36,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 675 transitions. [2021-11-25 19:49:36,355 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 675 transitions. Word has length 442 [2021-11-25 19:49:36,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:36,355 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 675 transitions. [2021-11-25 19:49:36,356 INFO L471 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) [2021-11-25 19:49:36,356 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 675 transitions. [2021-11-25 19:49:36,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-11-25 19:49:36,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:36,359 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:49:36,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-25 19:49:36,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 19:49:36,573 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:49:36,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:36,573 INFO L85 PathProgramCache]: Analyzing trace with hash -234018727, now seen corresponding path program 12 times [2021-11-25 19:49:36,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:49:36,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355501043] [2021-11-25 19:49:36,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:36,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:49:36,660 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:49:36,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2110619956] [2021-11-25 19:49:36,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:49:36,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:36,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:49:36,676 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:49:36,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-25 19:49:37,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:49:37,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:49:37,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:49:37,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 70728 backedges. 41 proven. 3 refuted. 0 times theorem prover too weak. 70684 trivial. 0 not checked. [2021-11-25 19:49:37,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:49:38,333 INFO L134 CoverageAnalysis]: Checked inductivity of 70728 backedges. 41 proven. 3 refuted. 0 times theorem prover too weak. 70684 trivial. 0 not checked. [2021-11-25 19:49:38,333 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:49:38,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355501043] [2021-11-25 19:49:38,333 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:49:38,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110619956] [2021-11-25 19:49:38,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110619956] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:49:38,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1953200986] [2021-11-25 19:49:38,336 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 19:49:38,337 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:49:38,337 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:49:38,337 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:49:38,337 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:49:38,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:38,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:38,399 INFO L354 Elim1Store]: treesize reduction 91, result has 27.8 percent of original size [2021-11-25 19:49:38,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 treesize of output 60 [2021-11-25 19:49:38,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:38,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:38,473 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:49:38,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:38,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:38,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-25 19:49:38,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:38,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:38,761 INFO L354 Elim1Store]: treesize reduction 149, result has 18.6 percent of original size [2021-11-25 19:49:38,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 404 treesize of output 390 [2021-11-25 19:49:38,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:38,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:39,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:39,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:39,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:39,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:39,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:39,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:39,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:39,331 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:49:39,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:49:39,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:39,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:39,413 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-25 19:49:39,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:39,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:39,475 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:39,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:39,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:39,583 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:49:39,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:49:39,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:39,617 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:39,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:39,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:39,714 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:49:39,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:49:39,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:39,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:39,832 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-25 19:49:39,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:39,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:39,886 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:39,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:39,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:39,927 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:49:39,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:49:39,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:39,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:40,018 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-25 19:49:40,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:40,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:40,069 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:40,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:40,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:40,181 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:40,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:40,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:40,221 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:40,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:40,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:40,264 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:40,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:40,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:40,335 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-25 19:49:40,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-25 19:49:40,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:40,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:40,473 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-25 19:49:40,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:40,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:40,541 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:40,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:40,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:40,577 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:40,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:40,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:40,644 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:40,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:40,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:40,682 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:40,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:40,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:40,721 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:40,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:40,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:40,777 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:49:40,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:49:40,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:40,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:40,889 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-25 19:49:40,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:40,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:40,937 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:40,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:40,943 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:49:42,024 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29545#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |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_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (= |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 [2021-11-25 19:49:42,024 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:49:42,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:49:42,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-25 19:49:42,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326860141] [2021-11-25 19:49:42,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:49:42,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 19:49:42,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:49:42,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 19:49:42,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-11-25 19:49:42,026 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) [2021-11-25 19:49:42,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:42,395 INFO L93 Difference]: Finished difference Result 1003 states and 1217 transitions. [2021-11-25 19:49:42,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 19:49:42,396 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 [2021-11-25 19:49:42,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:42,401 INFO L225 Difference]: With dead ends: 1003 [2021-11-25 19:49:42,401 INFO L226 Difference]: Without dead ends: 812 [2021-11-25 19:49:42,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1334 GetRequests, 1299 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2021-11-25 19:49:42,403 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 26 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:42,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 40 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:49:42,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-11-25 19:49:42,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 607. [2021-11-25 19:49:42,602 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) [2021-11-25 19:49:42,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 696 transitions. [2021-11-25 19:49:42,604 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 696 transitions. Word has length 443 [2021-11-25 19:49:42,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:42,604 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 696 transitions. [2021-11-25 19:49:42,604 INFO L471 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) [2021-11-25 19:49:42,604 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 696 transitions. [2021-11-25 19:49:42,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2021-11-25 19:49:42,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:42,608 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:49:42,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-25 19:49:42,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 19:49:42,815 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:49:42,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:42,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1654232045, now seen corresponding path program 13 times [2021-11-25 19:49:42,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:49:42,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123351239] [2021-11-25 19:49:42,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:42,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:49:42,919 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:49:42,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740633941] [2021-11-25 19:49:42,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:49:42,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:42,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:49:42,923 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:49:42,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-25 19:49:43,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:43,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 3727 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-25 19:49:43,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:45,466 INFO L134 CoverageAnalysis]: Checked inductivity of 70890 backedges. 15478 proven. 1081 refuted. 0 times theorem prover too weak. 54331 trivial. 0 not checked. [2021-11-25 19:49:45,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:49:49,198 INFO L134 CoverageAnalysis]: Checked inductivity of 70890 backedges. 15478 proven. 1081 refuted. 0 times theorem prover too weak. 54331 trivial. 0 not checked. [2021-11-25 19:49:49,198 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:49:49,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123351239] [2021-11-25 19:49:49,198 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:49:49,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740633941] [2021-11-25 19:49:49,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740633941] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:49:49,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [156685404] [2021-11-25 19:49:49,200 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 19:49:49,201 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:49:49,201 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:49:49,201 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:49:49,201 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:49:49,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:49,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:49,255 INFO L354 Elim1Store]: treesize reduction 91, result has 27.8 percent of original size [2021-11-25 19:49:49,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 treesize of output 60 [2021-11-25 19:49:49,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:49,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:49,325 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:49:49,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:49,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:49,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-25 19:49:49,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:49,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:49,612 INFO L354 Elim1Store]: treesize reduction 149, result has 18.6 percent of original size [2021-11-25 19:49:49,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 404 treesize of output 390 [2021-11-25 19:49:49,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:49,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:49,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-25 19:49:49,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:49,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:50,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-25 19:49:50,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:50,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:49:50,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:50,224 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:50,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:50,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:50,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:50,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:50,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:50,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:50,280 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:49:50,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2021-11-25 19:49:50,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:50,315 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:50,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:50,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:50,394 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:49:50,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:49:50,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:50,428 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:50,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:50,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:50,493 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:50,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:50,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:50,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:50,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:50,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:50,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:50,545 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:49:50,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2021-11-25 19:49:50,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:50,577 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:50,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:50,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:50,623 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:49:50,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:49:50,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:50,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:50,735 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-25 19:49:50,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:50,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:50,776 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:50,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:50,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:50,887 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:50,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:50,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:50,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:50,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:50,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:50,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:50,980 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:49:50,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 179 [2021-11-25 19:49:51,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:51,031 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:51,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:51,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:51,068 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:51,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:51,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:51,137 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:51,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:51,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:51,175 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:51,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:51,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:51,210 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:51,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:51,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:51,275 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:51,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:51,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:51,312 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:51,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:51,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:51,350 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:51,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:51,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:51,412 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:51,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:51,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:51,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:51,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:51,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:51,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:51,463 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:49:51,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-25 19:49:51,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:51,494 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:49:51,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:49:51,499 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:49:53,081 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35414#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |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_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (= |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 [2021-11-25 19:49:53,082 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:49:53,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:49:53,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 97 [2021-11-25 19:49:53,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684948926] [2021-11-25 19:49:53,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:49:53,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-25 19:49:53,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:49:53,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-25 19:49:53,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5009, Invalid=6547, Unknown=0, NotChecked=0, Total=11556 [2021-11-25 19:49:53,088 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) [2021-11-25 19:50:08,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:08,111 INFO L93 Difference]: Finished difference Result 4184 states and 6130 transitions. [2021-11-25 19:50:08,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-25 19:50:08,112 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 [2021-11-25 19:50:08,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:08,129 INFO L225 Difference]: With dead ends: 4184 [2021-11-25 19:50:08,129 INFO L226 Difference]: Without dead ends: 3627 [2021-11-25 19:50:08,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1410 GetRequests, 1244 SyntacticMatches, 13 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8577 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=9756, Invalid=14114, Unknown=0, NotChecked=0, Total=23870 [2021-11-25 19:50:08,138 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 3614 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 2301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3614 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 3114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2301 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:08,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3614 Valid, 284 Invalid, 3114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2301 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-25 19:50:08,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3627 states. [2021-11-25 19:50:08,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3627 to 1135. [2021-11-25 19:50:08,520 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) [2021-11-25 19:50:08,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1272 transitions. [2021-11-25 19:50:08,523 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1272 transitions. Word has length 455 [2021-11-25 19:50:08,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:08,523 INFO L470 AbstractCegarLoop]: Abstraction has 1135 states and 1272 transitions. [2021-11-25 19:50:08,524 INFO L471 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) [2021-11-25 19:50:08,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1272 transitions. [2021-11-25 19:50:08,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 840 [2021-11-25 19:50:08,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:08,532 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:50:08,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:08,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:50:08,759 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:50:08,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:08,760 INFO L85 PathProgramCache]: Analyzing trace with hash 294079469, now seen corresponding path program 14 times [2021-11-25 19:50:08,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:50:08,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143357033] [2021-11-25 19:50:08,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:08,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:50:08,906 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:50:08,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [134233861] [2021-11-25 19:50:08,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:50:08,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:50:08,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:50:08,913 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:50:08,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-25 19:50:09,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 19:50:09,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:50:09,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:50:09,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:12,723 INFO L134 CoverageAnalysis]: Checked inductivity of 288810 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 288793 trivial. 0 not checked. [2021-11-25 19:50:12,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 288810 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 288793 trivial. 0 not checked. [2021-11-25 19:50:15,780 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:50:15,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143357033] [2021-11-25 19:50:15,780 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:50:15,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134233861] [2021-11-25 19:50:15,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134233861] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:15,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [300079690] [2021-11-25 19:50:15,782 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 19:50:15,782 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:50:15,782 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:50:15,783 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:50:15,783 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:50:15,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:15,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:15,841 INFO L354 Elim1Store]: treesize reduction 91, result has 27.8 percent of original size [2021-11-25 19:50:15,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 treesize of output 60 [2021-11-25 19:50:15,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:15,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:15,908 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:50:15,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:50:15,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:15,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-25 19:50:16,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:16,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:16,151 INFO L354 Elim1Store]: treesize reduction 149, result has 18.6 percent of original size [2021-11-25 19:50:16,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 404 treesize of output 390 [2021-11-25 19:50:16,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:50:16,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:50:16,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-25 19:50:16,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:50:16,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:50:16,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:50:16,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:50:16,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:50:16,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:16,833 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:50:16,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:50:16,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:16,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:16,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:16,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:16,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:16,885 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:50:16,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2021-11-25 19:50:16,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:16,919 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:50:16,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:50:16,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:16,992 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:50:16,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:50:17,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:17,037 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:50:17,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:50:17,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:17,118 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:50:17,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:50:17,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:17,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:17,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:17,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:17,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:17,166 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:50:17,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2021-11-25 19:50:17,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:17,202 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:50:17,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:50:17,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:17,243 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:50:17,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:50:17,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:17,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:17,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:17,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:17,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:17,290 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:50:17,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-25 19:50:17,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:17,324 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:50:17,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:50:17,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:17,475 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-25 19:50:17,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-25 19:50:17,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:17,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:17,594 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-25 19:50:17,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:50:17,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:17,657 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:50:17,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:50:17,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:17,694 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:50:17,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:50:17,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:17,763 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:50:17,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:50:17,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:17,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:17,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:17,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:17,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:17,858 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:50:17,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2021-11-25 19:50:17,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:17,903 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:50:17,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:50:17,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:17,940 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:50:17,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:50:17,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:18,006 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-25 19:50:18,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-25 19:50:18,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:18,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:18,150 INFO L354 Elim1Store]: treesize reduction 300, result has 25.4 percent of original size [2021-11-25 19:50:18,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:50:18,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:18,232 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:50:18,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:50:18,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:18,280 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:50:18,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:50:18,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:18,354 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:50:18,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:50:18,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:18,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:18,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:18,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:18,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:18,416 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:50:18,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-25 19:50:18,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:18,465 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:50:18,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:50:18,470 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:50:19,533 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '50762#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |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_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (= |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 [2021-11-25 19:50:19,533 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:50:19,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:50:19,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-11-25 19:50:19,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249644175] [2021-11-25 19:50:19,534 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:50:19,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:50:19,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:50:19,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:50:19,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-11-25 19:50:19,536 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) [2021-11-25 19:50:19,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:19,946 INFO L93 Difference]: Finished difference Result 1449 states and 1694 transitions. [2021-11-25 19:50:19,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:50:19,947 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 [2021-11-25 19:50:19,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:19,952 INFO L225 Difference]: With dead ends: 1449 [2021-11-25 19:50:19,952 INFO L226 Difference]: Without dead ends: 1139 [2021-11-25 19:50:19,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2517 GetRequests, 2488 SyntacticMatches, 13 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-11-25 19:50:19,957 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:19,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 6 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:50:19,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-11-25 19:50:20,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1136. [2021-11-25 19:50:20,360 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) [2021-11-25 19:50:20,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1270 transitions. [2021-11-25 19:50:20,363 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1270 transitions. Word has length 839 [2021-11-25 19:50:20,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:20,365 INFO L470 AbstractCegarLoop]: Abstraction has 1136 states and 1270 transitions. [2021-11-25 19:50:20,365 INFO L471 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) [2021-11-25 19:50:20,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1270 transitions. [2021-11-25 19:50:20,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 845 [2021-11-25 19:50:20,373 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:20,373 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:50:20,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:20,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:50:20,583 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:50:20,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:20,584 INFO L85 PathProgramCache]: Analyzing trace with hash 814504007, now seen corresponding path program 15 times [2021-11-25 19:50:20,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:50:20,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840813737] [2021-11-25 19:50:20,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:20,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:50:20,733 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:50:20,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2124075962] [2021-11-25 19:50:20,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:50:20,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:50:20,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:50:20,735 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:50:20,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-25 19:50:21,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:50:21,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:50:21,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:50:21,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:22,620 INFO L134 CoverageAnalysis]: Checked inductivity of 288855 backedges. 164 proven. 30 refuted. 0 times theorem prover too weak. 288661 trivial. 0 not checked. [2021-11-25 19:50:22,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:23,546 INFO L134 CoverageAnalysis]: Checked inductivity of 288855 backedges. 157 proven. 37 refuted. 0 times theorem prover too weak. 288661 trivial. 0 not checked. [2021-11-25 19:50:23,547 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:50:23,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840813737] [2021-11-25 19:50:23,547 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:50:23,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124075962] [2021-11-25 19:50:23,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124075962] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:23,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [218607209] [2021-11-25 19:50:23,548 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 19:50:23,549 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:50:23,549 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:50:23,549 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:50:23,549 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:50:23,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:23,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:23,616 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:50:23,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:50:23,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:23,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:23,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 47 [2021-11-25 19:50:23,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:23,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-25 19:50:23,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:23,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:23,901 INFO L354 Elim1Store]: treesize reduction 149, result has 18.6 percent of original size [2021-11-25 19:50:23,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 404 treesize of output 390 [2021-11-25 19:50:24,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:50:24,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:50:24,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-25 19:50:24,416 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-25 19:50:24,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2021-11-25 19:50:24,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:50:24,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:50:24,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:50:24,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:24,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 120 [2021-11-25 19:50:24,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:50:24,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:50:24,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:24,848 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:50:24,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:50:24,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:24,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:24,923 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-25 19:50:24,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:50:24,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:24,973 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:50:24,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:50:25,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:25,050 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:50:25,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:50:25,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:25,084 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:50:25,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:50:25,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:25,166 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:50:25,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:50:25,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:25,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:25,258 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-25 19:50:25,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:50:25,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:25,391 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:50:25,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:50:25,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:25,434 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:50:25,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:50:25,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:25,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:25,603 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-25 19:50:25,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:50:25,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:25,654 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:50:25,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:50:25,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:25,754 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:50:25,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:50:25,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:25,801 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:50:25,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:50:25,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:25,836 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:50:25,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:50:25,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:25,905 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-25 19:50:25,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-25 19:50:25,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:25,944 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:50:25,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:50:25,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:25,982 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:50:25,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:50:26,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:26,048 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-25 19:50:26,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-25 19:50:26,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:26,112 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:50:26,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:50:26,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:26,149 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:50:26,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:50:26,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:26,210 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:50:26,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:50:26,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:26,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:26,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:26,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:26,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:26,258 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:50:26,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-25 19:50:26,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:26,312 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:50:26,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:50:26,320 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:50:27,475 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '60727#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |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_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (= |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 [2021-11-25 19:50:27,475 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:50:27,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:50:27,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-11-25 19:50:27,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909542171] [2021-11-25 19:50:27,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:50:27,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 19:50:27,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:50:27,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 19:50:27,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-11-25 19:50:27,478 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) [2021-11-25 19:50:28,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:28,364 INFO L93 Difference]: Finished difference Result 1567 states and 1858 transitions. [2021-11-25 19:50:28,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 19:50:28,365 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 [2021-11-25 19:50:28,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:28,372 INFO L225 Difference]: With dead ends: 1567 [2021-11-25 19:50:28,373 INFO L226 Difference]: Without dead ends: 1198 [2021-11-25 19:50:28,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2547 GetRequests, 2504 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=409, Invalid=1397, Unknown=0, NotChecked=0, Total=1806 [2021-11-25 19:50:28,375 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:28,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 39 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:50:28,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2021-11-25 19:50:28,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1161. [2021-11-25 19:50:28,805 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) [2021-11-25 19:50:28,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1307 transitions. [2021-11-25 19:50:28,808 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1307 transitions. Word has length 844 [2021-11-25 19:50:28,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:28,809 INFO L470 AbstractCegarLoop]: Abstraction has 1161 states and 1307 transitions. [2021-11-25 19:50:28,809 INFO L471 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) [2021-11-25 19:50:28,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1307 transitions. [2021-11-25 19:50:28,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2021-11-25 19:50:28,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:28,818 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:50:28,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:29,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-25 19:50:29,043 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:50:29,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:29,044 INFO L85 PathProgramCache]: Analyzing trace with hash -937638281, now seen corresponding path program 16 times [2021-11-25 19:50:29,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:50:29,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344582098] [2021-11-25 19:50:29,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:29,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:50:29,195 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:50:29,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [220414194] [2021-11-25 19:50:29,196 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:50:29,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:50:29,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:50:29,199 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:50:29,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-25 19:50:30,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:30,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 7246 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-25 19:50:30,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:35,428 INFO L134 CoverageAnalysis]: Checked inductivity of 288941 backedges. 63190 proven. 4465 refuted. 0 times theorem prover too weak. 221286 trivial. 0 not checked. [2021-11-25 19:50:35,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:51:14,578 INFO L134 CoverageAnalysis]: Checked inductivity of 288941 backedges. 63190 proven. 4465 refuted. 0 times theorem prover too weak. 221286 trivial. 0 not checked. [2021-11-25 19:51:14,578 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:51:14,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344582098] [2021-11-25 19:51:14,578 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:51:14,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220414194] [2021-11-25 19:51:14,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220414194] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:51:14,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1641523444] [2021-11-25 19:51:14,580 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 19:51:14,581 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:51:14,581 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:51:14,581 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:51:14,581 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:51:14,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:14,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:14,656 INFO L354 Elim1Store]: treesize reduction 91, result has 27.8 percent of original size [2021-11-25 19:51:14,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 treesize of output 60 [2021-11-25 19:51:14,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:14,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:14,726 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:51:14,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:51:14,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:14,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2021-11-25 19:51:14,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:14,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:14,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:14,963 INFO L354 Elim1Store]: treesize reduction 88, result has 7.4 percent of original size [2021-11-25 19:51:14,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 412 treesize of output 388 [2021-11-25 19:51:15,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:51:15,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:51:15,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:51:15,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:51:15,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:51:15,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-25 19:51:15,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:51:15,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:51:15,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:51:15,514 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:51:15,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:51:15,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:15,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:15,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:15,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:51:15,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:51:15,556 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:51:15,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 169 [2021-11-25 19:51:15,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:51:15,591 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:51:15,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:51:15,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:51:15,684 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:51:15,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:51:15,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:51:15,721 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:51:15,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:51:15,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:51:15,824 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:51:15,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:51:15,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:15,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:15,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:15,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:51:15,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:51:15,888 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:51:15,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2021-11-25 19:51:15,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:51:15,930 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:51:15,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:51:15,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:51:15,975 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:51:15,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:51:16,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:51:16,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:51:16,070 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-25 19:51:16,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:51:16,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:51:16,115 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:51:16,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:51:16,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:51:16,246 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:51:16,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:51:16,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:51:16,282 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:51:16,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:51:16,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:51:16,319 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:51:16,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:51:16,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:51:16,390 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:51:16,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:51:16,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:51:16,428 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:51:16,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:51:16,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:51:16,466 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:51:16,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:51:16,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:51:16,529 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-25 19:51:16,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-25 19:51:16,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:51:16,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:51:16,737 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-25 19:51:16,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:51:16,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:51:16,791 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:51:16,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:51:16,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:51:16,832 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:51:16,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:51:16,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:51:16,888 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:51:16,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:51:16,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:51:16,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:51:16,986 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-25 19:51:16,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:51:17,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:51:17,043 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:51:17,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:51:17,051 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:51:19,248 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '71208#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |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_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (= |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 [2021-11-25 19:51:19,248 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:51:19,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:51:19,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 193 [2021-11-25 19:51:19,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841538875] [2021-11-25 19:51:19,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:51:19,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2021-11-25 19:51:19,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:51:19,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2021-11-25 19:51:19,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19169, Invalid=22243, Unknown=0, NotChecked=0, Total=41412 [2021-11-25 19:51:19,265 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) [2021-11-25 19:54:51,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:51,259 INFO L93 Difference]: Finished difference Result 9848 states and 14847 transitions. [2021-11-25 19:54:51,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-11-25 19:54:51,262 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 [2021-11-25 19:54:51,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:51,299 INFO L225 Difference]: With dead ends: 9848 [2021-11-25 19:54:51,299 INFO L226 Difference]: Without dead ends: 8785 [2021-11-25 19:54:51,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2637 GetRequests, 2327 SyntacticMatches, 13 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26385 ImplicationChecksByTransitivity, 168.8s TimeCoverageRelationStatistics Valid=37884, Invalid=51218, Unknown=0, NotChecked=0, Total=89102 [2021-11-25 19:54:51,308 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 6634 mSDsluCounter, 947 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 5172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6634 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 6798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5172 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:51,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6634 Valid, 572 Invalid, 6798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5172 Valid, 1626 Invalid, 0 Unknown, 0 Unchecked, 17.5s Time] [2021-11-25 19:54:51,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8785 states. [2021-11-25 19:54:52,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8785 to 2217. [2021-11-25 19:54:52,079 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) [2021-11-25 19:54:52,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 2459 transitions. [2021-11-25 19:54:52,083 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 2459 transitions. Word has length 848 [2021-11-25 19:54:52,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:52,083 INFO L470 AbstractCegarLoop]: Abstraction has 2217 states and 2459 transitions. [2021-11-25 19:54:52,084 INFO L471 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) [2021-11-25 19:54:52,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 2459 transitions. [2021-11-25 19:54:52,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1617 [2021-11-25 19:54:52,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:52,106 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:54:52,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-25 19:54:52,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:52,306 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:54:52,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:52,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1171215991, now seen corresponding path program 17 times [2021-11-25 19:54:52,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:54:52,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729352911] [2021-11-25 19:54:52,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:52,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:54:52,601 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:54:52,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1121820337] [2021-11-25 19:54:52,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:54:52,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:52,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:54:52,602 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:54:52,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-25 19:55:00,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 19:55:00,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:55:00,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:55:00,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:55:03,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1167149 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 1167090 trivial. 0 not checked. [2021-11-25 19:55:03,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:55:05,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1167149 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 1167090 trivial. 0 not checked. [2021-11-25 19:55:05,928 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:55:05,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729352911] [2021-11-25 19:55:05,928 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:55:05,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121820337] [2021-11-25 19:55:05,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121820337] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:55:05,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [668680050] [2021-11-25 19:55:05,931 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 19:55:05,931 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:55:05,931 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:55:05,931 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:55:05,932 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:55:05,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:05,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:06,004 INFO L354 Elim1Store]: treesize reduction 91, result has 27.8 percent of original size [2021-11-25 19:55:06,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 treesize of output 60 [2021-11-25 19:55:06,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:06,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:06,085 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:55:06,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:55:06,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:06,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2021-11-25 19:55:06,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:06,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:06,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:06,336 INFO L354 Elim1Store]: treesize reduction 88, result has 7.4 percent of original size [2021-11-25 19:55:06,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 412 treesize of output 388 [2021-11-25 19:55:06,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:55:06,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:55:06,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:55:06,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:55:06,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:55:06,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-25 19:55:06,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:55:06,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:55:06,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:06,982 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:55:06,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:55:07,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:07,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:07,057 INFO L354 Elim1Store]: treesize reduction 293, result has 21.2 percent of original size [2021-11-25 19:55:07,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:55:07,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:07,110 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:55:07,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:55:07,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:07,208 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:55:07,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:55:07,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:07,259 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:55:07,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:55:07,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:07,349 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:55:07,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:55:07,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:07,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:07,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:07,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:07,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:07,402 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:55:07,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 157 [2021-11-25 19:55:07,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:07,437 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:55:07,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:55:07,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:07,480 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:55:07,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:55:07,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:07,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:07,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:07,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:07,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:07,531 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:55:07,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-25 19:55:07,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:07,566 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:55:07,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:55:07,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:07,697 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:55:07,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:55:07,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:07,748 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:55:07,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:55:07,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:07,800 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:55:07,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:55:07,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:07,890 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-25 19:55:07,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-25 19:55:07,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:07,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:08,047 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-25 19:55:08,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:55:08,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:08,119 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:55:08,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:55:08,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:08,157 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:55:08,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:55:08,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:08,222 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:55:08,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:55:08,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:08,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:08,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:08,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:08,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:08,434 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:55:08,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2021-11-25 19:55:08,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:08,478 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:55:08,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:55:08,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:08,515 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:55:08,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:55:08,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:08,575 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:55:08,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:55:08,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:08,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:08,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:08,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:08,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:08,624 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:55:08,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-25 19:55:08,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:08,660 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:55:08,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:55:08,664 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:55:09,716 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '104376#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |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_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (= |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 [2021-11-25 19:55:09,716 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:55:09,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:55:09,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-25 19:55:09,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758134752] [2021-11-25 19:55:09,718 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:55:09,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:55:09,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:55:09,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:55:09,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-11-25 19:55:09,720 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) [2021-11-25 19:55:10,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:55:10,804 INFO L93 Difference]: Finished difference Result 2878 states and 3342 transitions. [2021-11-25 19:55:10,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:55:10,807 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 [2021-11-25 19:55:10,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:55:10,816 INFO L225 Difference]: With dead ends: 2878 [2021-11-25 19:55:10,816 INFO L226 Difference]: Without dead ends: 2213 [2021-11-25 19:55:10,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4848 GetRequests, 4817 SyntacticMatches, 13 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-11-25 19:55:10,817 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 54 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:55:10,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 20 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:55:10,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2213 states. [2021-11-25 19:55:11,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2213 to 2204. [2021-11-25 19:55:11,447 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) [2021-11-25 19:55:11,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 2430 transitions. [2021-11-25 19:55:11,450 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 2430 transitions. Word has length 1616 [2021-11-25 19:55:11,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:55:11,451 INFO L470 AbstractCegarLoop]: Abstraction has 2204 states and 2430 transitions. [2021-11-25 19:55:11,451 INFO L471 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) [2021-11-25 19:55:11,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 2430 transitions. [2021-11-25 19:55:11,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1634 [2021-11-25 19:55:11,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:55:11,473 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:55:11,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-25 19:55:11,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:55:11,674 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:55:11,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:55:11,674 INFO L85 PathProgramCache]: Analyzing trace with hash -816145346, now seen corresponding path program 18 times [2021-11-25 19:55:11,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:55:11,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293814889] [2021-11-25 19:55:11,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:55:11,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:55:11,966 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:55:11,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1951229559] [2021-11-25 19:55:11,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:55:11,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:55:11,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:55:11,968 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:55:11,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-25 19:55:13,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:55:13,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:55:13,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 19:55:13,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:55:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1167664 backedges. 337 proven. 32 refuted. 0 times theorem prover too weak. 1167295 trivial. 0 not checked. [2021-11-25 19:55:15,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:55:17,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1167664 backedges. 337 proven. 32 refuted. 0 times theorem prover too weak. 1167295 trivial. 0 not checked. [2021-11-25 19:55:17,908 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:55:17,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293814889] [2021-11-25 19:55:17,908 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:55:17,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951229559] [2021-11-25 19:55:17,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951229559] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:55:17,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [71770999] [2021-11-25 19:55:17,910 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-25 19:55:17,910 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:55:17,910 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:55:17,910 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:55:17,911 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:55:17,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:17,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:17,979 INFO L354 Elim1Store]: treesize reduction 91, result has 27.8 percent of original size [2021-11-25 19:55:17,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 treesize of output 60 [2021-11-25 19:55:18,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:18,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:18,059 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:55:18,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:55:18,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:18,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-25 19:55:18,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:18,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:18,305 INFO L354 Elim1Store]: treesize reduction 149, result has 18.6 percent of original size [2021-11-25 19:55:18,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 404 treesize of output 390 [2021-11-25 19:55:18,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:55:18,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:55:18,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-25 19:55:18,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:55:18,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:55:18,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-25 19:55:18,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:55:19,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 19:55:19,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:19,092 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:55:19,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:55:19,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:19,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:19,220 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-25 19:55:19,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:55:19,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:19,274 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:55:19,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:55:19,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:19,374 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:55:19,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:55:19,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:19,412 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:55:19,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:55:19,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:19,508 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:55:19,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:55:19,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:19,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:19,641 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-25 19:55:19,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:55:19,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:19,708 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:55:19,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:55:19,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:19,760 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:55:19,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:55:19,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:19,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:19,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:19,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:19,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:19,811 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:55:19,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 151 [2021-11-25 19:55:19,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:19,862 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:55:19,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:55:19,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:19,979 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:55:19,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:55:20,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:20,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:20,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:20,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:20,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:20,081 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:55:20,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 179 [2021-11-25 19:55:20,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:20,127 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:55:20,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:55:20,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:20,166 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:55:20,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:55:20,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:20,236 INFO L354 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2021-11-25 19:55:20,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-11-25 19:55:20,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:20,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:20,383 INFO L354 Elim1Store]: treesize reduction 313, result has 22.1 percent of original size [2021-11-25 19:55:20,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:55:20,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:20,456 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:55:20,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:55:20,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:20,492 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:55:20,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:55:20,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:20,573 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:55:20,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:55:20,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:20,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:20,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:20,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:20,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:20,658 INFO L354 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2021-11-25 19:55:20,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 173 [2021-11-25 19:55:20,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:20,705 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:55:20,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:55:20,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:20,749 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:55:20,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:55:20,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:20,829 INFO L354 Elim1Store]: treesize reduction 30, result has 40.0 percent of original size [2021-11-25 19:55:20,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-11-25 19:55:20,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:20,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:20,967 INFO L354 Elim1Store]: treesize reduction 283, result has 23.9 percent of original size [2021-11-25 19:55:20,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:55:21,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:21,028 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-25 19:55:21,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-11-25 19:55:21,031 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:55:22,254 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '123778#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |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_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~n~0#1| 4) |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4))))) (= |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 [2021-11-25 19:55:22,254 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:55:22,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:55:22,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-25 19:55:22,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462527615] [2021-11-25 19:55:22,255 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:55:22,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-25 19:55:22,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:55:22,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-25 19:55:22,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-11-25 19:55:22,257 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) [2021-11-25 19:55:26,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:55:26,076 INFO L93 Difference]: Finished difference Result 7531 states and 8391 transitions. [2021-11-25 19:55:26,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-25 19:55:26,079 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 [2021-11-25 19:55:26,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:55:26,112 INFO L225 Difference]: With dead ends: 7531 [2021-11-25 19:55:26,112 INFO L226 Difference]: Without dead ends: 6887 [2021-11-25 19:55:26,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4928 GetRequests, 4869 SyntacticMatches, 14 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=494, Invalid=1668, Unknown=0, NotChecked=0, Total=2162 [2021-11-25 19:55:26,115 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 76 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:55:26,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 116 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 19:55:26,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6887 states. [2021-11-25 19:55:26,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6887 to 2252. [2021-11-25 19:55:26,777 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) [2021-11-25 19:55:26,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2252 states to 2252 states and 2486 transitions. [2021-11-25 19:55:26,781 INFO L78 Accepts]: Start accepts. Automaton has 2252 states and 2486 transitions. Word has length 1633 [2021-11-25 19:55:26,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:55:26,782 INFO L470 AbstractCegarLoop]: Abstraction has 2252 states and 2486 transitions. [2021-11-25 19:55:26,782 INFO L471 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) [2021-11-25 19:55:26,782 INFO L276 IsEmpty]: Start isEmpty. Operand 2252 states and 2486 transitions. [2021-11-25 19:55:26,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1682 [2021-11-25 19:55:26,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:55:26,806 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:55:26,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-25 19:55:27,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-25 19:55:27,019 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:55:27,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:55:27,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1937700894, now seen corresponding path program 19 times [2021-11-25 19:55:27,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:55:27,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693522834] [2021-11-25 19:55:27,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:55:27,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:55:27,323 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:55:27,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [816347687] [2021-11-25 19:55:27,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:55:27,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:55:27,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:55:27,325 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:55:27,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7bdddd14-e4f3-495d-b9ce-509bf20945a4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-25 19:55:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:55:31,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 14541 conjuncts, 193 conjunts are in the unsatisfiable core [2021-11-25 19:55:31,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:55:46,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1170168 backedges. 255382 proven. 18145 refuted. 0 times theorem prover too weak. 896641 trivial. 0 not checked. [2021-11-25 19:55:46,469 INFO L328 TraceCheckSpWp]: Computing backward predicates...