./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/prefixsum_iter.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_iter.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P --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 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:03:34,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:03:34,311 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:03:34,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:03:34,374 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:03:34,381 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:03:34,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:03:34,390 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:03:34,393 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:03:34,404 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:03:34,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:03:34,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:03:34,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:03:34,413 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:03:34,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:03:34,426 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:03:34,428 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:03:34,430 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:03:34,433 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:03:34,443 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:03:34,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:03:34,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:03:34,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:03:34,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:03:34,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:03:34,460 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:03:34,461 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:03:34,463 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:03:34,464 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:03:34,466 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:03:34,468 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:03:34,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:03:34,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:03:34,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:03:34,476 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:03:34,476 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:03:34,477 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:03:34,478 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:03:34,478 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:03:34,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:03:34,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:03:34,482 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:03:34,539 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:03:34,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:03:34,543 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:03:34,543 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:03:34,545 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:03:34,545 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:03:34,545 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:03:34,546 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:03:34,546 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:03:34,546 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:03:34,548 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:03:34,548 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:03:34,549 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:03:34,549 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:03:34,549 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:03:34,550 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:03:34,550 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:03:34,550 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:03:34,552 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:03:34,553 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:03:34,553 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:03:34,553 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:03:34,554 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:03:34,554 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:03:34,554 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:03:34,555 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:03:34,557 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:03:34,558 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:03:34,558 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:03:34,558 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:03:34,559 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:03:34,560 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:03:34,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:03:34,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:03:34,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:03:34,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:03:34,562 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:03:34,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:03:34,563 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:03:34,563 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:03:34,563 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:03:34,564 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_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d [2021-11-21 00:03:34,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:03:34,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:03:34,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:03:34,942 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:03:34,943 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:03:34,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/verifythis/prefixsum_iter.c [2021-11-21 00:03:35,019 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/data/2069d9c1f/22bf9efbba3b4f8ab46700b2f2f59505/FLAG1525cec88 [2021-11-21 00:03:35,472 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:03:35,473 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/sv-benchmarks/c/verifythis/prefixsum_iter.c [2021-11-21 00:03:35,480 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/data/2069d9c1f/22bf9efbba3b4f8ab46700b2f2f59505/FLAG1525cec88 [2021-11-21 00:03:35,864 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/data/2069d9c1f/22bf9efbba3b4f8ab46700b2f2f59505 [2021-11-21 00:03:35,867 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:03:35,869 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:03:35,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:03:35,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:03:35,888 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:03:35,889 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:03:35" (1/1) ... [2021-11-21 00:03:35,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bcbf591 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:03:35, skipping insertion in model container [2021-11-21 00:03:35,890 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:03:35" (1/1) ... [2021-11-21 00:03:35,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:03:35,914 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:03:36,100 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_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2021-11-21 00:03:36,147 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:03:36,164 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:03:36,190 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_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2021-11-21 00:03:36,223 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:03:36,239 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:03:36,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:03:36 WrapperNode [2021-11-21 00:03:36,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:03:36,241 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:03:36,241 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:03:36,241 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:03:36,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:03:36" (1/1) ... [2021-11-21 00:03:36,270 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:03:36" (1/1) ... [2021-11-21 00:03:36,302 INFO L137 Inliner]: procedures = 22, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 125 [2021-11-21 00:03:36,303 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:03:36,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:03:36,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:03:36,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:03:36,315 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:03:36" (1/1) ... [2021-11-21 00:03:36,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:03:36" (1/1) ... [2021-11-21 00:03:36,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:03:36" (1/1) ... [2021-11-21 00:03:36,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:03:36" (1/1) ... [2021-11-21 00:03:36,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:03:36" (1/1) ... [2021-11-21 00:03:36,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:03:36" (1/1) ... [2021-11-21 00:03:36,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:03:36" (1/1) ... [2021-11-21 00:03:36,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:03:36,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:03:36,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:03:36,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:03:36,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:03:36" (1/1) ... [2021-11-21 00:03:36,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:03:36,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:03:36,402 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:03:36,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:03:36,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:03:36,468 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 00:03:36,468 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 00:03:36,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:03:36,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:03:36,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:03:36,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:03:36,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:03:36,470 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:03:36,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-21 00:03:36,470 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-21 00:03:36,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:03:36,625 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:03:36,627 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:03:37,002 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:03:37,062 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:03:37,062 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-21 00:03:37,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:03:37 BoogieIcfgContainer [2021-11-21 00:03:37,065 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:03:37,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:03:37,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:03:37,080 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:03:37,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:03:35" (1/3) ... [2021-11-21 00:03:37,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c6d0b6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:03:37, skipping insertion in model container [2021-11-21 00:03:37,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:03:36" (2/3) ... [2021-11-21 00:03:37,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c6d0b6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:03:37, skipping insertion in model container [2021-11-21 00:03:37,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:03:37" (3/3) ... [2021-11-21 00:03:37,084 INFO L111 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2021-11-21 00:03:37,091 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:03:37,094 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:03:37,147 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:03:37,155 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 [2021-11-21 00:03:37,155 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:03:37,173 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:03:37,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-21 00:03:37,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:03:37,180 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:03:37,180 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:03:37,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:03:37,186 INFO L85 PathProgramCache]: Analyzing trace with hash -316911424, now seen corresponding path program 1 times [2021-11-21 00:03:37,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:03:37,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787576601] [2021-11-21 00:03:37,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:03:37,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:03:37,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:03:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:03:37,495 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:03:37,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787576601] [2021-11-21 00:03:37,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787576601] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:03:37,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:03:37,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:03:37,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505832760] [2021-11-21 00:03:37,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:03:37,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:03:37,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:03:37,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:03:37,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:03:37,552 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-21 00:03:39,599 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 00:03:39,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:03:39,988 INFO L93 Difference]: Finished difference Result 63 states and 93 transitions. [2021-11-21 00:03:39,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:03:39,990 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 24 [2021-11-21 00:03:39,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:03:39,998 INFO L225 Difference]: With dead ends: 63 [2021-11-21 00:03:39,998 INFO L226 Difference]: Without dead ends: 43 [2021-11-21 00:03:40,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:03:40,005 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 68 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:03:40,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 95 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-21 00:03:40,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-21 00:03:40,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 25. [2021-11-21 00:03:40,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:03:40,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2021-11-21 00:03:40,048 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 24 [2021-11-21 00:03:40,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:03:40,049 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2021-11-21 00:03:40,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-21 00:03:40,049 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2021-11-21 00:03:40,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-21 00:03:40,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:03:40,051 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:03:40,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:03:40,052 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:03:40,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:03:40,053 INFO L85 PathProgramCache]: Analyzing trace with hash -836108414, now seen corresponding path program 1 times [2021-11-21 00:03:40,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:03:40,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335902071] [2021-11-21 00:03:40,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:03:40,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:03:40,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:03:40,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:03:40,443 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:03:40,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335902071] [2021-11-21 00:03:40,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335902071] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:03:40,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485455068] [2021-11-21 00:03:40,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:03:40,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:03:40,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:03:40,453 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:03:40,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:03:40,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:03:40,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-21 00:03:40,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:03:40,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:03:40,700 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 7 treesize of output 6 [2021-11-21 00:03:40,839 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:03:40,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-21 00:03:40,916 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 14 treesize of output 16 [2021-11-21 00:03:41,091 INFO L354 Elim1Store]: treesize reduction 36, result has 12.2 percent of original size [2021-11-21 00:03:41,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 36 [2021-11-21 00:03:47,298 INFO L354 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2021-11-21 00:03:47,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 44 [2021-11-21 00:03:53,534 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:03:53,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 57 [2021-11-21 00:03:53,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:03:53,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:04:27,021 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_downsweep_~n#1_11| Int) (|v_ULTIMATE.start_downsweep_~a#1.offset_8| Int) (|ULTIMATE.start_check_~a#1.offset| Int) (|ULTIMATE.start_check_~i~0#1| Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_downsweep_~n#1_11| 4) (- 4) |v_ULTIMATE.start_downsweep_~a#1.offset_8|) 0) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) 0)) is different from false [2021-11-21 00:04:29,053 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (|v_ULTIMATE.start_downsweep_~n#1_11| Int) (|v_ULTIMATE.start_downsweep_~a#1.offset_8| Int) (|ULTIMATE.start_check_~a#1.offset| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|ULTIMATE.start_check_~i~0#1| Int) (|ULTIMATE.start_main_~i~1#1| Int)) (= (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| (let ((.cse0 (* |ULTIMATE.start_main_~i~1#1| 4))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base|) (+ .cse0 |ULTIMATE.start_main_~a0~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| .cse0))))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_downsweep_~n#1_11| 4) (- 4) |v_ULTIMATE.start_downsweep_~a#1.offset_8|) 0) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) 0)) is different from false [2021-11-21 00:04:31,075 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (|v_ULTIMATE.start_downsweep_~n#1_11| Int) (|v_ULTIMATE.start_downsweep_~a#1.offset_8| Int) (|ULTIMATE.start_check_~a#1.offset| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|ULTIMATE.start_check_~i~0#1| Int) (|ULTIMATE.start_main_~i~1#1| Int)) (= (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| (let ((.cse0 (* |ULTIMATE.start_main_~i~1#1| 4))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base|) (+ .cse0 |ULTIMATE.start_main_~a0~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| .cse0))))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_downsweep_~n#1_11| 4) (- 4) |v_ULTIMATE.start_downsweep_~a#1.offset_8|) 0) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) 0)) is different from false [2021-11-21 00:04:33,134 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (|v_ULTIMATE.start_downsweep_~n#1_11| Int) (|v_ULTIMATE.start_downsweep_~a#1.offset_8| Int) (|ULTIMATE.start_check_~a#1.offset| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|ULTIMATE.start_check_~i~0#1| Int) (|ULTIMATE.start_main_~i~1#1| Int)) (= (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| (let ((.cse0 ((as const (Array Int Int)) 0)) (.cse1 (* |ULTIMATE.start_main_~i~1#1| 4))) (store .cse0 (+ .cse1 |ULTIMATE.start_main_~a0~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse0) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| .cse1))))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_downsweep_~n#1_11| 4) (- 4) |v_ULTIMATE.start_downsweep_~a#1.offset_8|) 0) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) 0)) is different from false [2021-11-21 00:04:33,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485455068] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:04:33,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [530101810] [2021-11-21 00:04:33,159 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-21 00:04:33,159 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:04:33,164 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:04:33,171 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:04:33,171 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:04:34,687 INFO L354 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2021-11-21 00:04:34,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 44 [2021-11-21 00:04:34,865 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-21 00:04:34,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-21 00:04:35,086 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 7 treesize of output 6 [2021-11-21 00:04:35,776 INFO L354 Elim1Store]: treesize reduction 64, result has 41.3 percent of original size [2021-11-21 00:04:35,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 31 treesize of output 66 [2021-11-21 00:04:36,051 INFO L354 Elim1Store]: treesize reduction 80, result has 31.6 percent of original size [2021-11-21 00:04:36,052 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 37 treesize of output 65 [2021-11-21 00:04:36,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2021-11-21 00:04:37,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2021-11-21 00:04:37,491 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-21 00:04:37,806 INFO L354 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2021-11-21 00:04:37,807 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 5 case distinctions, treesize of input 280 treesize of output 277 [2021-11-21 00:04:39,004 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-11-21 00:04:39,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:04:39,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 22 [2021-11-21 00:04:41,373 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 87 for LOIs [2021-11-21 00:04:41,860 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 49 for LOIs [2021-11-21 00:04:41,946 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:04:53,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [530101810] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:04:53,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:04:53,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [11, 14] total 37 [2021-11-21 00:04:53,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134815214] [2021-11-21 00:04:53,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:04:53,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-21 00:04:53,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:04:53,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-21 00:04:53,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1311, Unknown=23, NotChecked=308, Total=1806 [2021-11-21 00:04:53,067 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 20 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:04:55,188 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:04:57,332 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:04:59,508 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:05:01,667 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:05:03,831 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:05:06,025 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:05:08,198 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:05:10,385 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:05:11,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:05:11,522 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2021-11-21 00:05:11,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-21 00:05:11,522 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2021-11-21 00:05:11,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:05:11,523 INFO L225 Difference]: With dead ends: 51 [2021-11-21 00:05:11,524 INFO L226 Difference]: Without dead ends: 42 [2021-11-21 00:05:11,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 63.6s TimeCoverageRelationStatistics Valid=170, Invalid=1383, Unknown=23, NotChecked=316, Total=1892 [2021-11-21 00:05:11,526 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 7 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 5 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 17.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:05:11,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 133 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 228 Invalid, 8 Unknown, 106 Unchecked, 17.9s Time] [2021-11-21 00:05:11,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-21 00:05:11,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-21 00:05:11,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-21 00:05:11,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2021-11-21 00:05:11,542 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 25 [2021-11-21 00:05:11,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:05:11,543 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2021-11-21 00:05:11,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:05:11,543 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2021-11-21 00:05:11,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-21 00:05:11,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:05:11,545 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:05:11,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:05:11,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:05:11,757 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:05:11,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:05:11,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1147529129, now seen corresponding path program 1 times [2021-11-21 00:05:11,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:05:11,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764586656] [2021-11-21 00:05:11,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:11,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:05:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:11,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:05:11,943 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:05:11,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764586656] [2021-11-21 00:05:11,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764586656] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:05:11,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501057217] [2021-11-21 00:05:11,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:11,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:05:11,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:05:11,946 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:05:11,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:05:12,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:12,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-21 00:05:12,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:05:12,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:05:12,094 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 7 treesize of output 6 [2021-11-21 00:05:12,204 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:05:12,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-21 00:05:12,315 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 14 treesize of output 16 [2021-11-21 00:05:12,404 INFO L354 Elim1Store]: treesize reduction 36, result has 12.2 percent of original size [2021-11-21 00:05:12,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 36 [2021-11-21 00:05:16,510 INFO L354 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2021-11-21 00:05:16,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 45 [2021-11-21 00:05:20,648 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:05:20,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 58 [2021-11-21 00:05:20,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:05:20,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:05:42,148 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_downsweep_~a#1.offset_9| Int) (|v_ULTIMATE.start_downsweep_~n#1_12| Int) (|ULTIMATE.start_check_~a#1.offset| Int) (|ULTIMATE.start_check_~i~0#1| Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (- 4) |v_ULTIMATE.start_downsweep_~a#1.offset_9| (* |v_ULTIMATE.start_downsweep_~n#1_12| 4)) 0) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) 0)) is different from false [2021-11-21 00:05:44,170 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (|v_ULTIMATE.start_downsweep_~a#1.offset_9| Int) (|v_ULTIMATE.start_downsweep_~n#1_12| Int) (|ULTIMATE.start_check_~a#1.offset| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|ULTIMATE.start_check_~i~0#1| Int) (|ULTIMATE.start_main_~i~1#1| Int)) (= (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| (let ((.cse0 (* |ULTIMATE.start_main_~i~1#1| 4))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base|) (+ .cse0 |ULTIMATE.start_main_~a0~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| .cse0))))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (- 4) |v_ULTIMATE.start_downsweep_~a#1.offset_9| (* |v_ULTIMATE.start_downsweep_~n#1_12| 4)) 0) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) 0)) is different from false [2021-11-21 00:05:46,183 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~a~0#1.offset| Int) (|v_ULTIMATE.start_downsweep_~a#1.offset_9| Int) (|v_ULTIMATE.start_downsweep_~n#1_12| Int) (|ULTIMATE.start_check_~a#1.offset| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|ULTIMATE.start_check_~i~0#1| Int) (|ULTIMATE.start_main_~i~1#1| Int)) (= (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| (let ((.cse0 (* |ULTIMATE.start_main_~i~1#1| 4))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base|) (+ .cse0 |ULTIMATE.start_main_~a0~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| .cse0))))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (- 4) |v_ULTIMATE.start_downsweep_~a#1.offset_9| (* |v_ULTIMATE.start_downsweep_~n#1_12| 4)) 0) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) 0)) is different from false [2021-11-21 00:05:56,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501057217] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:05:56,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [242892821] [2021-11-21 00:05:56,966 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-21 00:05:56,966 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:05:56,966 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:05:56,967 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:05:56,967 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:06:47,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:06:47,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 00:06:47,540 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 7 treesize of output 6 [2021-11-21 00:06:47,718 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-21 00:06:47,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-11-21 00:06:47,814 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:06:47,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-21 00:06:47,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-21 00:06:48,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-21 00:06:48,276 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-21 00:06:48,458 INFO L354 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2021-11-21 00:06:48,458 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 5 case distinctions, treesize of input 197 treesize of output 194 [2021-11-21 00:06:48,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:06:48,976 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 00:06:48,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-21 00:06:49,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 00:06:50,186 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 49 for LOIs [2021-11-21 00:06:50,340 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 6 for LOIs [2021-11-21 00:06:50,352 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:06:54,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [242892821] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:06:54,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:06:54,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 14] total 35 [2021-11-21 00:06:54,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025588684] [2021-11-21 00:06:54,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:06:54,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-21 00:06:54,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:06:54,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-21 00:06:54,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1264, Unknown=20, NotChecked=222, Total=1640 [2021-11-21 00:06:54,335 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 19 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:06:56,516 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:07:02,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:07:02,378 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2021-11-21 00:07:02,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 00:07:02,379 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2021-11-21 00:07:02,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:07:02,381 INFO L225 Difference]: With dead ends: 60 [2021-11-21 00:07:02,381 INFO L226 Difference]: Without dead ends: 53 [2021-11-21 00:07:02,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 53.8s TimeCoverageRelationStatistics Valid=321, Invalid=2120, Unknown=21, NotChecked=294, Total=2756 [2021-11-21 00:07:02,385 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 81 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 53 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:07:02,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 68 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 239 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-21 00:07:02,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-21 00:07:02,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43. [2021-11-21 00:07:02,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-21 00:07:02,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2021-11-21 00:07:02,402 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 26 [2021-11-21 00:07:02,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:07:02,403 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2021-11-21 00:07:02,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:07:02,403 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2021-11-21 00:07:02,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-21 00:07:02,405 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:07:02,405 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:07:02,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:07:02,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:07:02,619 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:07:02,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:07:02,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1985606588, now seen corresponding path program 1 times [2021-11-21 00:07:02,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:07:02,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680999867] [2021-11-21 00:07:02,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:07:02,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:07:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:07:02,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:07:02,754 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:07:02,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680999867] [2021-11-21 00:07:02,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680999867] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:07:02,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425700467] [2021-11-21 00:07:02,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:07:02,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:07:02,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:07:02,756 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:07:02,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:07:02,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:07:02,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:07:02,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:07:02,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:07:02,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:07:03,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:07:03,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425700467] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:07:03,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [934174081] [2021-11-21 00:07:03,082 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2021-11-21 00:07:03,082 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:07:03,083 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:07:03,083 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:07:03,083 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:07:04,292 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-21 00:07:04,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2021-11-21 00:07:04,368 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 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-21 00:07:04,669 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 7 treesize of output 6 [2021-11-21 00:07:05,280 INFO L354 Elim1Store]: treesize reduction 104, result has 26.2 percent of original size [2021-11-21 00:07:05,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 37 treesize of output 65 [2021-11-21 00:07:05,397 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 00:07:05,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 42 [2021-11-21 00:07:05,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2021-11-21 00:07:06,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2021-11-21 00:07:06,605 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-11-21 00:07:06,973 INFO L354 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2021-11-21 00:07:06,974 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 5 case distinctions, treesize of input 290 treesize of output 287 [2021-11-21 00:07:08,055 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2021-11-21 00:07:08,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:07:08,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-11-21 00:07:14,764 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 88 for LOIs [2021-11-21 00:07:15,174 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 49 for LOIs [2021-11-21 00:07:15,257 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:07:32,415 WARN L227 SmtUtils]: Spent 11.37s on a formula simplification. DAG size of input: 224 DAG size of output: 185 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:07:37,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [934174081] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:07:37,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:07:37,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [8, 7, 7] total 30 [2021-11-21 00:07:37,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367566916] [2021-11-21 00:07:37,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:07:37,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-21 00:07:37,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:07:37,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-21 00:07:37,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-11-21 00:07:37,089 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:07:39,270 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:07:40,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:07:40,685 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2021-11-21 00:07:40,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-21 00:07:40,686 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 28 [2021-11-21 00:07:40,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:07:40,687 INFO L225 Difference]: With dead ends: 51 [2021-11-21 00:07:40,687 INFO L226 Difference]: Without dead ends: 32 [2021-11-21 00:07:40,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-11-21 00:07:40,688 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 9 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:07:40,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 141 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 281 Invalid, 1 Unknown, 158 Unchecked, 2.9s Time] [2021-11-21 00:07:40,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-21 00:07:40,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-21 00:07:40,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:07:40,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2021-11-21 00:07:40,699 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 28 [2021-11-21 00:07:40,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:07:40,699 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2021-11-21 00:07:40,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:07:40,700 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2021-11-21 00:07:40,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-21 00:07:40,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:07:40,701 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:07:40,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-21 00:07:40,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:07:40,904 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:07:40,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:07:40,905 INFO L85 PathProgramCache]: Analyzing trace with hash 91873026, now seen corresponding path program 1 times [2021-11-21 00:07:40,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:07:40,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66524649] [2021-11-21 00:07:40,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:07:40,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:07:40,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:07:41,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:07:41,023 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:07:41,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66524649] [2021-11-21 00:07:41,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66524649] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:07:41,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720621443] [2021-11-21 00:07:41,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:07:41,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:07:41,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:07:41,027 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:07:41,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:07:41,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:07:41,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:07:41,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:07:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:07:41,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:07:41,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:07:41,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720621443] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:07:41,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1385414061] [2021-11-21 00:07:41,278 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2021-11-21 00:07:41,278 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:07:41,279 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:07:41,279 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:07:41,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:08:28,242 WARN L227 SmtUtils]: Spent 5.44s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 00:08:37,666 WARN L227 SmtUtils]: Spent 5.06s on a formula simplification that was a NOOP. DAG size: 3 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 00:08:48,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:08:48,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 00:08:48,808 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 7 treesize of output 6 [2021-11-21 00:08:48,953 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:08:48,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-21 00:08:48,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-21 00:08:49,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-21 00:08:49,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-21 00:08:49,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-21 00:08:49,632 INFO L354 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2021-11-21 00:08:49,632 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 5 case distinctions, treesize of input 197 treesize of output 194 [2021-11-21 00:08:50,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:08:50,180 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 00:08:50,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-21 00:08:50,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 00:08:51,431 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 49 for LOIs [2021-11-21 00:08:51,525 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 6 for LOIs [2021-11-21 00:08:51,535 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:08:53,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1385414061] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:08:53,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:08:53,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [7, 5, 5] total 29 [2021-11-21 00:08:53,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903517399] [2021-11-21 00:08:53,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:08:53,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-21 00:08:53,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:08:53,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-21 00:08:53,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-11-21 00:08:53,179 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:08:55,274 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:08:57,456 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:09:02,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:09:02,338 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2021-11-21 00:09:02,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-21 00:09:02,339 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 28 [2021-11-21 00:09:02,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:09:02,340 INFO L225 Difference]: With dead ends: 49 [2021-11-21 00:09:02,340 INFO L226 Difference]: Without dead ends: 40 [2021-11-21 00:09:02,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=224, Invalid=1498, Unknown=0, NotChecked=0, Total=1722 [2021-11-21 00:09:02,342 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 74 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 39 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:09:02,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 68 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 333 Invalid, 2 Unknown, 0 Unchecked, 5.1s Time] [2021-11-21 00:09:02,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-21 00:09:02,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2021-11-21 00:09:02,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:09:02,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2021-11-21 00:09:02,354 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 28 [2021-11-21 00:09:02,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:09:02,355 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2021-11-21 00:09:02,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:09:02,356 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2021-11-21 00:09:02,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-21 00:09:02,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:09:02,357 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:09:02,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:09:02,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:09:02,560 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:09:02,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:09:02,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1894588739, now seen corresponding path program 1 times [2021-11-21 00:09:02,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:09:02,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394381807] [2021-11-21 00:09:02,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:09:02,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:09:02,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:09:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:09:02,681 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:09:02,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394381807] [2021-11-21 00:09:02,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394381807] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:09:02,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122423575] [2021-11-21 00:09:02,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:09:02,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:09:02,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:09:02,682 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:09:02,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:09:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:09:02,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:09:02,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:09:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:09:02,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:09:02,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:09:02,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122423575] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:09:02,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1213597358] [2021-11-21 00:09:02,960 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2021-11-21 00:09:02,960 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:09:02,961 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:09:02,961 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:09:02,961 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:10:06,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:10:06,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 00:10:06,517 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 7 treesize of output 6 [2021-11-21 00:10:06,692 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-21 00:10:06,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-11-21 00:10:06,755 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:10:06,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-21 00:10:06,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-21 00:10:07,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-21 00:10:07,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-21 00:10:07,606 INFO L354 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2021-11-21 00:10:07,606 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 5 case distinctions, treesize of input 197 treesize of output 194 [2021-11-21 00:10:08,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:10:08,198 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 00:10:08,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-21 00:10:08,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 00:10:12,160 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 49 for LOIs [2021-11-21 00:10:12,275 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 6 for LOIs [2021-11-21 00:10:12,286 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:10:15,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1213597358] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:10:15,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:10:15,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [8, 7, 7] total 29 [2021-11-21 00:10:15,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532945696] [2021-11-21 00:10:15,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:10:15,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-21 00:10:15,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:10:15,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-21 00:10:15,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-11-21 00:10:15,652 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 19 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:10:17,788 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:10:22,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:10:22,736 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-11-21 00:10:22,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 00:10:22,736 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2021-11-21 00:10:22,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:10:22,737 INFO L225 Difference]: With dead ends: 39 [2021-11-21 00:10:22,737 INFO L226 Difference]: Without dead ends: 31 [2021-11-21 00:10:22,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=211, Invalid=1429, Unknown=0, NotChecked=0, Total=1640 [2021-11-21 00:10:22,739 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 65 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 50 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:10:22,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 52 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 312 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-11-21 00:10:22,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-21 00:10:22,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-11-21 00:10:22,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:10:22,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-11-21 00:10:22,747 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 29 [2021-11-21 00:10:22,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:10:22,748 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-11-21 00:10:22,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:10:22,748 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-11-21 00:10:22,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-21 00:10:22,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:10:22,749 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:10:22,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:10:22,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-21 00:10:22,952 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:10:22,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:10:22,953 INFO L85 PathProgramCache]: Analyzing trace with hash 966051846, now seen corresponding path program 1 times [2021-11-21 00:10:22,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:10:22,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639800428] [2021-11-21 00:10:22,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:10:22,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:10:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:10:23,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:10:23,043 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:10:23,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639800428] [2021-11-21 00:10:23,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639800428] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:10:23,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157661987] [2021-11-21 00:10:23,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:10:23,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:10:23,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:10:23,044 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:10:23,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:10:23,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:10:23,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:10:23,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:10:23,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:10:23,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:10:23,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:10:23,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157661987] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:10:23,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1514559030] [2021-11-21 00:10:23,247 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2021-11-21 00:10:23,247 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:10:23,248 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:10:23,248 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:10:23,248 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:11:22,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 00:11:22,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:11:22,713 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 7 treesize of output 6 [2021-11-21 00:11:22,888 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-21 00:11:22,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-11-21 00:11:22,986 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:11:22,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-21 00:11:23,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-21 00:11:23,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-21 00:11:23,499 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-11-21 00:11:23,675 INFO L354 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2021-11-21 00:11:23,675 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 5 case distinctions, treesize of input 202 treesize of output 199 [2021-11-21 00:11:24,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:11:24,188 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 00:11:24,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-21 00:11:24,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:24,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-11-21 00:11:25,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:25,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-11-21 00:11:25,437 INFO L354 Elim1Store]: treesize reduction 50, result has 38.3 percent of original size [2021-11-21 00:11:25,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 44 [2021-11-21 00:11:25,806 INFO L354 Elim1Store]: treesize reduction 50, result has 38.3 percent of original size [2021-11-21 00:11:25,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 44 [2021-11-21 00:11:26,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 00:11:28,263 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 49 for LOIs [2021-11-21 00:11:28,355 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 6 for LOIs [2021-11-21 00:11:28,366 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:11:30,932 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:11:30,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:11:30,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2021-11-21 00:11:30,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552589032] [2021-11-21 00:11:30,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:11:30,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 00:11:30,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:11:30,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 00:11:30,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-11-21 00:11:30,933 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-21 00:11:32,943 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 00:11:33,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:11:33,227 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2021-11-21 00:11:33,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:11:33,227 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2021-11-21 00:11:33,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:11:33,228 INFO L225 Difference]: With dead ends: 42 [2021-11-21 00:11:33,229 INFO L226 Difference]: Without dead ends: 31 [2021-11-21 00:11:33,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-11-21 00:11:33,230 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:11:33,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 86 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-21 00:11:33,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-21 00:11:33,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-21 00:11:33,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:11:33,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-11-21 00:11:33,240 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 29 [2021-11-21 00:11:33,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:11:33,241 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-11-21 00:11:33,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-21 00:11:33,241 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-11-21 00:11:33,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-21 00:11:33,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:11:33,243 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:11:33,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-21 00:11:33,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:11:33,449 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:11:33,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:11:33,449 INFO L85 PathProgramCache]: Analyzing trace with hash 227143670, now seen corresponding path program 2 times [2021-11-21 00:11:33,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:11:33,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105049859] [2021-11-21 00:11:33,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:11:33,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:11:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:11:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:11:33,601 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:11:33,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105049859] [2021-11-21 00:11:33,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105049859] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:11:33,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034704824] [2021-11-21 00:11:33,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:11:33,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:11:33,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:11:33,603 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:11:33,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 00:11:33,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-21 00:11:33,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:11:33,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-21 00:11:33,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:11:33,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 00:11:34,052 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2021-11-21 00:11:34,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 47 [2021-11-21 00:11:34,076 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:11:34,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:11:34,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034704824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:11:34,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:11:34,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2021-11-21 00:11:34,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007704374] [2021-11-21 00:11:34,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:11:34,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:11:34,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:11:34,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:11:34,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:11:34,078 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-21 00:11:34,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:11:34,257 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2021-11-21 00:11:34,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:11:34,257 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2021-11-21 00:11:34,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:11:34,258 INFO L225 Difference]: With dead ends: 40 [2021-11-21 00:11:34,258 INFO L226 Difference]: Without dead ends: 38 [2021-11-21 00:11:34,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:11:34,259 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:11:34,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 72 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2021-11-21 00:11:34,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-21 00:11:34,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2021-11-21 00:11:34,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:11:34,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2021-11-21 00:11:34,269 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 30 [2021-11-21 00:11:34,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:11:34,269 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2021-11-21 00:11:34,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-21 00:11:34,270 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2021-11-21 00:11:34,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-21 00:11:34,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:11:34,271 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:11:34,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-21 00:11:34,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:11:34,484 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:11:34,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:11:34,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1184314758, now seen corresponding path program 1 times [2021-11-21 00:11:34,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:11:34,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041894601] [2021-11-21 00:11:34,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:11:34,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:11:34,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:11:34,607 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:11:34,608 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:11:34,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041894601] [2021-11-21 00:11:34,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041894601] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:11:34,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040979608] [2021-11-21 00:11:34,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:11:34,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:11:34,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:11:34,609 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:11:34,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 00:11:34,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:11:34,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 00:11:34,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:11:34,833 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:11:34,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:11:35,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:11:35,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040979608] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:11:35,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2030562492] [2021-11-21 00:11:35,028 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-21 00:11:35,028 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:11:35,028 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:11:35,028 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:11:35,029 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:12:25,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 00:12:25,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:12:25,724 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 7 treesize of output 6 [2021-11-21 00:12:25,840 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:12:25,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-21 00:12:25,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-21 00:12:25,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-21 00:12:26,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-21 00:12:26,357 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-11-21 00:12:26,473 INFO L354 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2021-11-21 00:12:26,473 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 5 case distinctions, treesize of input 202 treesize of output 199 [2021-11-21 00:12:26,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:26,853 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 00:12:26,854 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 25 treesize of output 25 [2021-11-21 00:12:27,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:27,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-11-21 00:12:27,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:27,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-11-21 00:12:27,801 INFO L354 Elim1Store]: treesize reduction 50, result has 38.3 percent of original size [2021-11-21 00:12:27,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 44 [2021-11-21 00:12:28,049 INFO L354 Elim1Store]: treesize reduction 38, result has 53.1 percent of original size [2021-11-21 00:12:28,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 56 [2021-11-21 00:12:28,511 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 16 treesize of output 12 [2021-11-21 00:12:30,238 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 49 for LOIs [2021-11-21 00:12:30,348 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 6 for LOIs [2021-11-21 00:12:30,356 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:12:32,581 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:12:32,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:12:32,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2021-11-21 00:12:32,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482974442] [2021-11-21 00:12:32,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:12:32,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 00:12:32,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:12:32,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 00:12:32,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2021-11-21 00:12:32,584 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-21 00:12:32,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:12:32,847 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2021-11-21 00:12:32,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:12:32,857 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2021-11-21 00:12:32,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:12:32,858 INFO L225 Difference]: With dead ends: 41 [2021-11-21 00:12:32,858 INFO L226 Difference]: Without dead ends: 36 [2021-11-21 00:12:32,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2021-11-21 00:12:32,860 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 31 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:12:32,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 152 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:12:32,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-21 00:12:32,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-21 00:12:32,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:12:32,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-11-21 00:12:32,878 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 32 [2021-11-21 00:12:32,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:12:32,878 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-11-21 00:12:32,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-21 00:12:32,878 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-11-21 00:12:32,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-21 00:12:32,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:12:32,883 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:12:32,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 00:12:33,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:12:33,104 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:12:33,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:12:33,105 INFO L85 PathProgramCache]: Analyzing trace with hash 319410183, now seen corresponding path program 1 times [2021-11-21 00:12:33,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:12:33,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159205224] [2021-11-21 00:12:33,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:12:33,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:12:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:12:34,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:12:34,458 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:12:34,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159205224] [2021-11-21 00:12:34,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159205224] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:12:34,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947623670] [2021-11-21 00:12:34,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:12:34,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:12:34,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:12:34,461 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:12:34,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 00:12:34,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:12:34,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-21 00:12:34,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:12:34,711 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 16 treesize of output 12 [2021-11-21 00:12:34,882 INFO L354 Elim1Store]: treesize reduction 200, result has 8.3 percent of original size [2021-11-21 00:12:34,882 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 79 treesize of output 46 [2021-11-21 00:12:35,102 INFO L354 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2021-11-21 00:12:35,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 34 [2021-11-21 00:12:35,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:12:35,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:12:35,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 90 [2021-11-21 00:12:35,677 INFO L354 Elim1Store]: treesize reduction 35, result has 22.2 percent of original size [2021-11-21 00:12:35,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1145 treesize of output 983 [2021-11-21 00:12:36,272 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:12:36,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947623670] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:12:36,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1188073561] [2021-11-21 00:12:36,275 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-21 00:12:36,275 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:12:36,276 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:12:36,276 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:12:36,276 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:13:42,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 00:13:42,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:13:42,265 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 7 treesize of output 6 [2021-11-21 00:13:42,410 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-21 00:13:42,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-11-21 00:13:42,464 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:13:42,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-21 00:13:42,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-21 00:13:42,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-21 00:13:42,838 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-21 00:13:42,984 INFO L354 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2021-11-21 00:13:42,984 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 5 case distinctions, treesize of input 197 treesize of output 194 [2021-11-21 00:13:43,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:13:43,446 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 00:13:43,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-21 00:13:43,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:43,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-11-21 00:13:44,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:44,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-11-21 00:13:44,478 INFO L354 Elim1Store]: treesize reduction 50, result has 38.3 percent of original size [2021-11-21 00:13:44,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 44 [2021-11-21 00:13:44,689 INFO L354 Elim1Store]: treesize reduction 38, result has 53.1 percent of original size [2021-11-21 00:13:44,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 56 [2021-11-21 00:13:45,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 00:13:45,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:45,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:45,500 INFO L354 Elim1Store]: treesize reduction 41, result has 44.6 percent of original size [2021-11-21 00:13:45,501 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 2 case distinctions, treesize of input 67 treesize of output 64 [2021-11-21 00:13:45,787 INFO L354 Elim1Store]: treesize reduction 48, result has 40.7 percent of original size [2021-11-21 00:13:45,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 47 [2021-11-21 00:13:46,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:46,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:13:46,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 31 [2021-11-21 00:13:46,375 INFO L354 Elim1Store]: treesize reduction 142, result has 34.6 percent of original size [2021-11-21 00:13:46,376 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 109 treesize of output 129 [2021-11-21 00:13:46,750 INFO L354 Elim1Store]: treesize reduction 36, result has 55.6 percent of original size [2021-11-21 00:13:46,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2021-11-21 00:13:47,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:47,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:13:47,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 31 [2021-11-21 00:13:48,236 INFO L354 Elim1Store]: treesize reduction 142, result has 34.6 percent of original size [2021-11-21 00:13:48,237 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 109 treesize of output 129 [2021-11-21 00:13:48,449 INFO L354 Elim1Store]: treesize reduction 48, result has 40.7 percent of original size [2021-11-21 00:13:48,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 47 [2021-11-21 00:13:48,688 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 49 for LOIs [2021-11-21 00:13:48,824 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 6 for LOIs [2021-11-21 00:13:48,836 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:13:51,961 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:13:51,961 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:13:51,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 11] total 34 [2021-11-21 00:13:51,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041028827] [2021-11-21 00:13:51,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:13:51,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-21 00:13:51,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:13:51,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-21 00:13:51,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=2646, Unknown=0, NotChecked=0, Total=2862 [2021-11-21 00:13:51,964 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 34 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 32 states have internal predecessors, (49), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 00:13:54,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:13:54,712 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2021-11-21 00:13:54,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-21 00:13:54,713 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 32 states have internal predecessors, (49), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 33 [2021-11-21 00:13:54,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:13:54,714 INFO L225 Difference]: With dead ends: 56 [2021-11-21 00:13:54,714 INFO L226 Difference]: Without dead ends: 54 [2021-11-21 00:13:54,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=527, Invalid=4443, Unknown=0, NotChecked=0, Total=4970 [2021-11-21 00:13:54,716 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 80 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:13:54,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 165 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 380 Invalid, 0 Unknown, 22 Unchecked, 0.5s Time] [2021-11-21 00:13:54,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-21 00:13:54,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 35. [2021-11-21 00:13:54,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:13:54,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2021-11-21 00:13:54,728 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 33 [2021-11-21 00:13:54,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:13:54,728 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2021-11-21 00:13:54,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 32 states have internal predecessors, (49), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 00:13:54,729 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2021-11-21 00:13:54,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-21 00:13:54,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:13:54,730 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:13:54,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 00:13:54,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 00:13:54,948 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:13:54,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:13:54,948 INFO L85 PathProgramCache]: Analyzing trace with hash -2026580144, now seen corresponding path program 1 times [2021-11-21 00:13:54,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:13:54,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141859358] [2021-11-21 00:13:54,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:54,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:13:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 00:13:55,068 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:13:55,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141859358] [2021-11-21 00:13:55,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141859358] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:13:55,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50670544] [2021-11-21 00:13:55,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:55,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:55,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:13:55,070 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:13:55,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 00:13:55,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:55,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:13:55,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:13:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 00:13:55,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:13:55,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50670544] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:13:55,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:13:55,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2021-11-21 00:13:55,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776673832] [2021-11-21 00:13:55,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:13:55,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:13:55,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:13:55,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:13:55,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:13:55,341 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-21 00:13:55,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:13:55,428 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2021-11-21 00:13:55,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:13:55,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2021-11-21 00:13:55,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:13:55,429 INFO L225 Difference]: With dead ends: 44 [2021-11-21 00:13:55,429 INFO L226 Difference]: Without dead ends: 37 [2021-11-21 00:13:55,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:13:55,430 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 24 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:13:55,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 47 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:13:55,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-21 00:13:55,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-11-21 00:13:55,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:13:55,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2021-11-21 00:13:55,443 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 33 [2021-11-21 00:13:55,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:13:55,444 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2021-11-21 00:13:55,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-21 00:13:55,444 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2021-11-21 00:13:55,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-21 00:13:55,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:13:55,445 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:13:55,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 00:13:55,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:55,666 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:13:55,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:13:55,667 INFO L85 PathProgramCache]: Analyzing trace with hash -2093960801, now seen corresponding path program 1 times [2021-11-21 00:13:55,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:13:55,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012385703] [2021-11-21 00:13:55,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:55,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:13:55,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:58,185 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:13:58,185 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:13:58,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012385703] [2021-11-21 00:13:58,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012385703] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:13:58,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231613769] [2021-11-21 00:13:58,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:58,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:58,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:13:58,186 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:13:58,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 00:13:58,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:58,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-21 00:13:58,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:13:58,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:13:58,366 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 7 treesize of output 6 [2021-11-21 00:13:58,494 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:13:58,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-21 00:13:58,584 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 15 treesize of output 10 [2021-11-21 00:13:58,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-21 00:13:58,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2021-11-21 00:14:02,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 78 [2021-11-21 00:14:06,819 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 87 [2021-11-21 00:14:09,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 132 [2021-11-21 00:14:20,613 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:14:20,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 250 treesize of output 238 [2021-11-21 00:14:20,725 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:14:20,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:15:05,153 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_upsweep_~a#1.offset_14| Int) (|v_ULTIMATE.start_upsweep_~right~0#1_19| Int) (|v_ULTIMATE.start_downsweep_~space#1_35| Int) (|v_ULTIMATE.start_downsweep_~n#1_19| Int) (|v_ULTIMATE.start_upsweep_~left~0#1_48| Int)) (let ((.cse0 (let ((.cse2 (store (let ((.cse6 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse7 (+ |v_ULTIMATE.start_upsweep_~a#1.offset_14| (* |v_ULTIMATE.start_upsweep_~right~0#1_19| 4)))) (store .cse6 .cse7 (+ (select .cse6 (+ |v_ULTIMATE.start_upsweep_~a#1.offset_14| (* |v_ULTIMATE.start_upsweep_~left~0#1_48| 4))) (select .cse6 .cse7)))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_downsweep_~n#1_19| 4) (- 4)) 0)) (.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 4) (* |v_ULTIMATE.start_downsweep_~space#1_35| 8)))) (let ((.cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_downsweep_~space#1_35| 4) (- 4))) (.cse5 (select .cse2 .cse3))) (store (store .cse2 .cse3 (+ (select .cse2 .cse4) .cse5)) .cse4 .cse5))))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (< |v_ULTIMATE.start_downsweep_~n#1_19| |c_ULTIMATE.start_main_~n~0#1|) (< |v_ULTIMATE.start_upsweep_~a#1.offset_14| |c_ULTIMATE.start_main_~a~0#1.offset|) (< |v_ULTIMATE.start_upsweep_~left~0#1_48| 0) (< |v_ULTIMATE.start_upsweep_~right~0#1_19| (+ |v_ULTIMATE.start_upsweep_~left~0#1_48| 1)) (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse0) |c_ULTIMATE.start_main_~a0~0#1.base|) |c_ULTIMATE.start_main_~a0~0#1.offset|) .cse1)) (not (= .cse1 0)) (<= |v_ULTIMATE.start_downsweep_~space#1_35| 0) (< 1 |v_ULTIMATE.start_downsweep_~space#1_35|))))) is different from false [2021-11-21 00:15:07,814 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_upsweep_~a#1.offset_14| Int) (|v_ULTIMATE.start_upsweep_~right~0#1_19| Int) (|v_ULTIMATE.start_downsweep_~space#1_35| Int) (|v_ULTIMATE.start_downsweep_~n#1_19| Int) (|v_ULTIMATE.start_upsweep_~left~0#1_48| Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| (let ((.cse9 (* |c_ULTIMATE.start_main_~i~1#1| 4))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base|) (+ .cse9 |c_ULTIMATE.start_main_~a0~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse9))))))) (let ((.cse0 (let ((.cse3 (store (let ((.cse7 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse8 (+ |v_ULTIMATE.start_upsweep_~a#1.offset_14| (* |v_ULTIMATE.start_upsweep_~right~0#1_19| 4)))) (store .cse7 .cse8 (+ (select .cse7 (+ |v_ULTIMATE.start_upsweep_~a#1.offset_14| (* |v_ULTIMATE.start_upsweep_~left~0#1_48| 4))) (select .cse7 .cse8)))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_downsweep_~n#1_19| 4) (- 4)) 0)) (.cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 4) (* |v_ULTIMATE.start_downsweep_~space#1_35| 8)))) (let ((.cse6 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_downsweep_~space#1_35| 4) (- 4))) (.cse5 (select .cse3 .cse4))) (store (store .cse3 .cse4 (+ .cse5 (select .cse3 .cse6))) .cse6 .cse5))))) (let ((.cse2 (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (+ (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| .cse0) |c_ULTIMATE.start_main_~a0~0#1.base|) |c_ULTIMATE.start_main_~a0~0#1.offset|) .cse2)) (< |v_ULTIMATE.start_upsweep_~a#1.offset_14| |c_ULTIMATE.start_main_~a~0#1.offset|) (< |v_ULTIMATE.start_upsweep_~left~0#1_48| 0) (<= |v_ULTIMATE.start_downsweep_~n#1_19| |c_ULTIMATE.start_main_~i~1#1|) (< |v_ULTIMATE.start_upsweep_~right~0#1_19| (+ |v_ULTIMATE.start_upsweep_~left~0#1_48| 1)) (not (= .cse2 0)) (<= |v_ULTIMATE.start_downsweep_~space#1_35| 0) (< 1 |v_ULTIMATE.start_downsweep_~space#1_35|)))))) is different from false [2021-11-21 00:15:11,896 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~1#1_69| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_14| Int) (|v_ULTIMATE.start_upsweep_~right~0#1_19| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_downsweep_~space#1_35| Int) (|v_ULTIMATE.start_downsweep_~n#1_19| Int) (|v_ULTIMATE.start_upsweep_~left~0#1_48| Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| (let ((.cse9 (let ((.cse11 (* |c_ULTIMATE.start_main_~i~1#1| 4))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base|) (+ .cse11 |ULTIMATE.start_main_~a0~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse11))))) (.cse10 (* |v_ULTIMATE.start_main_~i~1#1_69| 4))) (store .cse9 (+ .cse10 |ULTIMATE.start_main_~a0~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| .cse9) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse10))))))) (let ((.cse1 (let ((.cse3 (store (let ((.cse7 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse8 (+ |v_ULTIMATE.start_upsweep_~a#1.offset_14| (* |v_ULTIMATE.start_upsweep_~right~0#1_19| 4)))) (store .cse7 .cse8 (+ (select .cse7 (+ |v_ULTIMATE.start_upsweep_~a#1.offset_14| (* |v_ULTIMATE.start_upsweep_~left~0#1_48| 4))) (select .cse7 .cse8)))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_downsweep_~n#1_19| 4) (- 4)) 0)) (.cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 4) (* |v_ULTIMATE.start_downsweep_~space#1_35| 8)))) (let ((.cse6 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_downsweep_~space#1_35| 4) (- 4))) (.cse5 (select .cse3 .cse4))) (store (store .cse3 .cse4 (+ .cse5 (select .cse3 .cse6))) .cse6 .cse5))))) (let ((.cse0 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (< |v_ULTIMATE.start_upsweep_~a#1.offset_14| |c_ULTIMATE.start_main_~a~0#1.offset|) (not (= .cse0 0)) (< |v_ULTIMATE.start_upsweep_~left~0#1_48| 0) (< |v_ULTIMATE.start_upsweep_~right~0#1_19| (+ |v_ULTIMATE.start_upsweep_~left~0#1_48| 1)) (= (select .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (+ (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~a0~0#1.base|) |ULTIMATE.start_main_~a0~0#1.offset|) .cse0)) (< |v_ULTIMATE.start_main_~i~1#1_69| (+ |c_ULTIMATE.start_main_~i~1#1| 1)) (<= |v_ULTIMATE.start_downsweep_~n#1_19| |v_ULTIMATE.start_main_~i~1#1_69|) (<= |v_ULTIMATE.start_downsweep_~space#1_35| 0) (< 1 |v_ULTIMATE.start_downsweep_~space#1_35|)))))) is different from false [2021-11-21 00:15:15,098 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~1#1_69| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_14| Int) (|v_ULTIMATE.start_upsweep_~right~0#1_19| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_downsweep_~space#1_35| Int) (|v_ULTIMATE.start_downsweep_~n#1_19| Int) (|v_ULTIMATE.start_upsweep_~left~0#1_48| Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| (let ((.cse9 (store (select |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base|) |ULTIMATE.start_main_~a0~0#1.offset| (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (.cse10 (* |v_ULTIMATE.start_main_~i~1#1_69| 4))) (store .cse9 (+ .cse10 |ULTIMATE.start_main_~a0~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse9) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse10))))))) (let ((.cse2 (let ((.cse3 (store (let ((.cse8 (+ |v_ULTIMATE.start_upsweep_~a#1.offset_14| (* |v_ULTIMATE.start_upsweep_~right~0#1_19| 4))) (.cse7 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse7 .cse8 (+ (select .cse7 .cse8) (select .cse7 (+ |v_ULTIMATE.start_upsweep_~a#1.offset_14| (* |v_ULTIMATE.start_upsweep_~left~0#1_48| 4)))))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_downsweep_~n#1_19| 4) (- 4)) 0)) (.cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 4) (* |v_ULTIMATE.start_downsweep_~space#1_35| 8)))) (let ((.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_downsweep_~space#1_35| 4) (- 4))) (.cse6 (select .cse3 .cse4))) (store (store .cse3 .cse4 (+ (select .cse3 .cse5) .cse6)) .cse5 .cse6))))) (let ((.cse0 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= (+ .cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| .cse2) |c_ULTIMATE.start_main_#t~malloc16#1.base|) |ULTIMATE.start_main_~a0~0#1.offset|)) (select .cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (< |v_ULTIMATE.start_upsweep_~a#1.offset_14| |c_ULTIMATE.start_main_~a~0#1.offset|) (< |v_ULTIMATE.start_main_~i~1#1_69| 1) (< |v_ULTIMATE.start_upsweep_~left~0#1_48| 0) (< |v_ULTIMATE.start_upsweep_~right~0#1_19| (+ |v_ULTIMATE.start_upsweep_~left~0#1_48| 1)) (<= |v_ULTIMATE.start_downsweep_~n#1_19| |v_ULTIMATE.start_main_~i~1#1_69|) (<= |v_ULTIMATE.start_downsweep_~space#1_35| 0) (< 1 |v_ULTIMATE.start_downsweep_~space#1_35|) (not (= .cse0 0))))))) is different from false [2021-11-21 00:15:18,355 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~1#1_69| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_14| Int) (|v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_26| Int) (|v_ULTIMATE.start_upsweep_~right~0#1_19| Int) (|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_28| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_downsweep_~space#1_35| Int) (|v_ULTIMATE.start_downsweep_~n#1_19| Int) (|v_ULTIMATE.start_upsweep_~left~0#1_48| Int)) (let ((.cse1 (store |c_#memory_int| |c_#Ultimate.meminit_#ptr.base| (let ((.cse9 (store (select |c_#memory_int| |c_#Ultimate.meminit_#ptr.base|) |ULTIMATE.start_main_~a0~0#1.offset| (select (select |c_#memory_int| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_28|) |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_26|))) (.cse10 (* |v_ULTIMATE.start_main_~i~1#1_69| 4))) (store .cse9 (+ .cse10 |ULTIMATE.start_main_~a0~0#1.offset|) (select (select (store |c_#memory_int| |c_#Ultimate.meminit_#ptr.base| .cse9) |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_28|) (+ .cse10 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_26|))))))) (let ((.cse2 (let ((.cse3 (store (let ((.cse8 (+ |v_ULTIMATE.start_upsweep_~a#1.offset_14| (* |v_ULTIMATE.start_upsweep_~right~0#1_19| 4))) (.cse7 (select .cse1 |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_28|))) (store .cse7 .cse8 (+ (select .cse7 .cse8) (select .cse7 (+ |v_ULTIMATE.start_upsweep_~a#1.offset_14| (* |v_ULTIMATE.start_upsweep_~left~0#1_48| 4)))))) (+ (* |v_ULTIMATE.start_downsweep_~n#1_19| 4) (- 4) |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_26|) 0)) (.cse4 (+ (- 4) |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_26| (* |v_ULTIMATE.start_downsweep_~space#1_35| 8)))) (let ((.cse5 (+ (* |v_ULTIMATE.start_downsweep_~space#1_35| 4) (- 4) |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_26|)) (.cse6 (select .cse3 .cse4))) (store (store .cse3 .cse4 (+ (select .cse3 .cse5) .cse6)) .cse5 .cse6))))) (let ((.cse0 (select .cse2 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_26|))) (or (< |v_ULTIMATE.start_main_~i~1#1_69| 1) (< |v_ULTIMATE.start_upsweep_~left~0#1_48| 0) (not (= .cse0 0)) (< |v_ULTIMATE.start_upsweep_~right~0#1_19| (+ |v_ULTIMATE.start_upsweep_~left~0#1_48| 1)) (< |v_ULTIMATE.start_upsweep_~a#1.offset_14| |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_26|) (= (+ .cse0 (select (select (store .cse1 |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_28| .cse2) |c_#Ultimate.meminit_#ptr.base|) |ULTIMATE.start_main_~a0~0#1.offset|)) (select .cse2 (+ |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_26| 4))) (<= |v_ULTIMATE.start_downsweep_~n#1_19| |v_ULTIMATE.start_main_~i~1#1_69|) (<= |v_ULTIMATE.start_downsweep_~space#1_35| 0) (< 1 |v_ULTIMATE.start_downsweep_~space#1_35|)))))) is different from false [2021-11-21 00:15:18,442 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 1 times theorem prover too weak. 4 trivial. 3 not checked. [2021-11-21 00:15:18,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231613769] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:15:18,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1307684804] [2021-11-21 00:15:18,444 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-21 00:15:18,445 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:15:18,445 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:15:18,445 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:15:18,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:16:13,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:16:13,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 00:16:13,186 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 7 treesize of output 6 [2021-11-21 00:16:13,331 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:16:13,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-21 00:16:13,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-21 00:16:13,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-21 00:16:13,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-21 00:16:13,916 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-21 00:16:14,017 INFO L354 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2021-11-21 00:16:14,018 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 5 case distinctions, treesize of input 197 treesize of output 194 [2021-11-21 00:16:14,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:16:14,594 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-21 00:16:14,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-21 00:16:14,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:14,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-11-21 00:16:15,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:15,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-11-21 00:16:15,824 INFO L354 Elim1Store]: treesize reduction 50, result has 38.3 percent of original size [2021-11-21 00:16:15,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 44 [2021-11-21 00:16:16,207 INFO L354 Elim1Store]: treesize reduction 38, result has 53.1 percent of original size [2021-11-21 00:16:16,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 56 [2021-11-21 00:16:16,795 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 16 treesize of output 12 [2021-11-21 00:16:17,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:17,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:17,292 INFO L354 Elim1Store]: treesize reduction 41, result has 44.6 percent of original size [2021-11-21 00:16:17,293 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 2 case distinctions, treesize of input 67 treesize of output 64 [2021-11-21 00:16:17,517 INFO L354 Elim1Store]: treesize reduction 36, result has 55.6 percent of original size [2021-11-21 00:16:17,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2021-11-21 00:16:18,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:18,029 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:16:18,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 31 [2021-11-21 00:16:18,344 INFO L354 Elim1Store]: treesize reduction 142, result has 34.6 percent of original size [2021-11-21 00:16:18,344 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 105 treesize of output 125 [2021-11-21 00:16:18,704 INFO L354 Elim1Store]: treesize reduction 36, result has 55.6 percent of original size [2021-11-21 00:16:18,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2021-11-21 00:16:25,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:16:25,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:16:25,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 31 [2021-11-21 00:16:26,314 INFO L354 Elim1Store]: treesize reduction 142, result has 34.6 percent of original size [2021-11-21 00:16:26,315 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 105 treesize of output 125 [2021-11-21 00:16:26,635 INFO L354 Elim1Store]: treesize reduction 48, result has 40.7 percent of original size [2021-11-21 00:16:26,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 47 [2021-11-21 00:16:26,989 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 49 for LOIs [2021-11-21 00:16:27,084 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 6 for LOIs [2021-11-21 00:16:27,096 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:16:34,443 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:16:34,444 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:16:34,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 19] total 57 [2021-11-21 00:16:34,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155286931] [2021-11-21 00:16:34,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:16:34,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-21 00:16:34,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:16:34,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-21 00:16:34,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=4870, Unknown=29, NotChecked=730, Total=6006 [2021-11-21 00:16:34,447 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 57 states, 50 states have (on average 1.36) internal successors, (68), 51 states have internal predecessors, (68), 4 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 00:16:36,510 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-21 00:16:38,834 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_#Ultimate.meminit_#ptr.base|))) (and (= |c_#memory_int| (store |c_old(#memory_int)| |c_#Ultimate.meminit_#ptr.base| .cse0)) (exists ((|v_ULTIMATE.start_main_#t~malloc15#1.base_BEFORE_CALL_52| Int)) (= (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc15#1.base_BEFORE_CALL_52|) 1)) (= ((as const (Array Int Int)) 0) .cse0) (forall ((|v_ULTIMATE.start_main_~i~1#1_69| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_14| Int) (|v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_26| Int) (|v_ULTIMATE.start_upsweep_~right~0#1_19| Int) (|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_28| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_downsweep_~space#1_35| Int) (|v_ULTIMATE.start_downsweep_~n#1_19| Int) (|v_ULTIMATE.start_upsweep_~left~0#1_48| Int)) (let ((.cse2 (store |c_#memory_int| |c_#Ultimate.meminit_#ptr.base| (let ((.cse10 (store (select |c_#memory_int| |c_#Ultimate.meminit_#ptr.base|) |ULTIMATE.start_main_~a0~0#1.offset| (select (select |c_#memory_int| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_28|) |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_26|))) (.cse11 (* |v_ULTIMATE.start_main_~i~1#1_69| 4))) (store .cse10 (+ .cse11 |ULTIMATE.start_main_~a0~0#1.offset|) (select (select (store |c_#memory_int| |c_#Ultimate.meminit_#ptr.base| .cse10) |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_28|) (+ .cse11 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_26|))))))) (let ((.cse3 (let ((.cse4 (store (let ((.cse9 (+ |v_ULTIMATE.start_upsweep_~a#1.offset_14| (* |v_ULTIMATE.start_upsweep_~right~0#1_19| 4))) (.cse8 (select .cse2 |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_28|))) (store .cse8 .cse9 (+ (select .cse8 .cse9) (select .cse8 (+ |v_ULTIMATE.start_upsweep_~a#1.offset_14| (* |v_ULTIMATE.start_upsweep_~left~0#1_48| 4)))))) (+ (* |v_ULTIMATE.start_downsweep_~n#1_19| 4) (- 4) |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_26|) 0)) (.cse5 (+ (- 4) |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_26| (* |v_ULTIMATE.start_downsweep_~space#1_35| 8)))) (let ((.cse6 (+ (* |v_ULTIMATE.start_downsweep_~space#1_35| 4) (- 4) |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_26|)) (.cse7 (select .cse4 .cse5))) (store (store .cse4 .cse5 (+ (select .cse4 .cse6) .cse7)) .cse6 .cse7))))) (let ((.cse1 (select .cse3 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_26|))) (or (< |v_ULTIMATE.start_main_~i~1#1_69| 1) (< |v_ULTIMATE.start_upsweep_~left~0#1_48| 0) (not (= .cse1 0)) (< |v_ULTIMATE.start_upsweep_~right~0#1_19| (+ |v_ULTIMATE.start_upsweep_~left~0#1_48| 1)) (< |v_ULTIMATE.start_upsweep_~a#1.offset_14| |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_26|) (= (+ .cse1 (select (select (store .cse2 |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_28| .cse3) |c_#Ultimate.meminit_#ptr.base|) |ULTIMATE.start_main_~a0~0#1.offset|)) (select .cse3 (+ |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_26| 4))) (<= |v_ULTIMATE.start_downsweep_~n#1_19| |v_ULTIMATE.start_main_~i~1#1_69|) (<= |v_ULTIMATE.start_downsweep_~space#1_35| 0) (< 1 |v_ULTIMATE.start_downsweep_~space#1_35|)))))))) is different from false [2021-11-21 00:16:40,909 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_#Ultimate.meminit_#ptr.base|))) (and (= |c_#memory_int| (store |c_old(#memory_int)| |c_#Ultimate.meminit_#ptr.base| .cse0)) (= ((as const (Array Int Int)) 0) .cse0) (forall ((|v_ULTIMATE.start_main_~i~1#1_69| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_14| Int) (|v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_26| Int) (|v_ULTIMATE.start_upsweep_~right~0#1_19| Int) (|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_28| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_downsweep_~space#1_35| Int) (|v_ULTIMATE.start_downsweep_~n#1_19| Int) (|v_ULTIMATE.start_upsweep_~left~0#1_48| Int)) (let ((.cse2 (store |c_#memory_int| |c_#Ultimate.meminit_#ptr.base| (let ((.cse10 (store (select |c_#memory_int| |c_#Ultimate.meminit_#ptr.base|) |ULTIMATE.start_main_~a0~0#1.offset| (select (select |c_#memory_int| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_28|) |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_26|))) (.cse11 (* |v_ULTIMATE.start_main_~i~1#1_69| 4))) (store .cse10 (+ .cse11 |ULTIMATE.start_main_~a0~0#1.offset|) (select (select (store |c_#memory_int| |c_#Ultimate.meminit_#ptr.base| .cse10) |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_28|) (+ .cse11 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_26|))))))) (let ((.cse3 (let ((.cse4 (store (let ((.cse9 (+ |v_ULTIMATE.start_upsweep_~a#1.offset_14| (* |v_ULTIMATE.start_upsweep_~right~0#1_19| 4))) (.cse8 (select .cse2 |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_28|))) (store .cse8 .cse9 (+ (select .cse8 .cse9) (select .cse8 (+ |v_ULTIMATE.start_upsweep_~a#1.offset_14| (* |v_ULTIMATE.start_upsweep_~left~0#1_48| 4)))))) (+ (* |v_ULTIMATE.start_downsweep_~n#1_19| 4) (- 4) |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_26|) 0)) (.cse5 (+ (- 4) |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_26| (* |v_ULTIMATE.start_downsweep_~space#1_35| 8)))) (let ((.cse6 (+ (* |v_ULTIMATE.start_downsweep_~space#1_35| 4) (- 4) |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_26|)) (.cse7 (select .cse4 .cse5))) (store (store .cse4 .cse5 (+ (select .cse4 .cse6) .cse7)) .cse6 .cse7))))) (let ((.cse1 (select .cse3 |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_26|))) (or (< |v_ULTIMATE.start_main_~i~1#1_69| 1) (< |v_ULTIMATE.start_upsweep_~left~0#1_48| 0) (not (= .cse1 0)) (< |v_ULTIMATE.start_upsweep_~right~0#1_19| (+ |v_ULTIMATE.start_upsweep_~left~0#1_48| 1)) (< |v_ULTIMATE.start_upsweep_~a#1.offset_14| |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_26|) (= (+ .cse1 (select (select (store .cse2 |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_28| .cse3) |c_#Ultimate.meminit_#ptr.base|) |ULTIMATE.start_main_~a0~0#1.offset|)) (select .cse3 (+ |v_ULTIMATE.start_main_~a~0#1.offset_BEFORE_CALL_26| 4))) (<= |v_ULTIMATE.start_downsweep_~n#1_19| |v_ULTIMATE.start_main_~i~1#1_69|) (<= |v_ULTIMATE.start_downsweep_~space#1_35| 0) (< 1 |v_ULTIMATE.start_downsweep_~space#1_35|)))))))) is different from false [2021-11-21 00:16:42,961 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= .cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base|)) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= |c_ULTIMATE.start_main_#t~malloc16#1.offset| 0) (= .cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (forall ((|v_ULTIMATE.start_main_~i~1#1_69| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_14| Int) (|v_ULTIMATE.start_upsweep_~right~0#1_19| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_downsweep_~space#1_35| Int) (|v_ULTIMATE.start_downsweep_~n#1_19| Int) (|v_ULTIMATE.start_upsweep_~left~0#1_48| Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| (let ((.cse10 (store (select |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base|) |ULTIMATE.start_main_~a0~0#1.offset| (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (.cse11 (* |v_ULTIMATE.start_main_~i~1#1_69| 4))) (store .cse10 (+ .cse11 |ULTIMATE.start_main_~a0~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse10) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse11))))))) (let ((.cse3 (let ((.cse4 (store (let ((.cse9 (+ |v_ULTIMATE.start_upsweep_~a#1.offset_14| (* |v_ULTIMATE.start_upsweep_~right~0#1_19| 4))) (.cse8 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|))) (store .cse8 .cse9 (+ (select .cse8 .cse9) (select .cse8 (+ |v_ULTIMATE.start_upsweep_~a#1.offset_14| (* |v_ULTIMATE.start_upsweep_~left~0#1_48| 4)))))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_downsweep_~n#1_19| 4) (- 4)) 0)) (.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 4) (* |v_ULTIMATE.start_downsweep_~space#1_35| 8)))) (let ((.cse6 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_downsweep_~space#1_35| 4) (- 4))) (.cse7 (select .cse4 .cse5))) (store (store .cse4 .cse5 (+ (select .cse4 .cse6) .cse7)) .cse6 .cse7))))) (let ((.cse1 (select .cse3 |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= (+ .cse1 (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| .cse3) |c_ULTIMATE.start_main_#t~malloc16#1.base|) |ULTIMATE.start_main_~a0~0#1.offset|)) (select .cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (< |v_ULTIMATE.start_upsweep_~a#1.offset_14| |c_ULTIMATE.start_main_~a~0#1.offset|) (< |v_ULTIMATE.start_main_~i~1#1_69| 1) (< |v_ULTIMATE.start_upsweep_~left~0#1_48| 0) (< |v_ULTIMATE.start_upsweep_~right~0#1_19| (+ |v_ULTIMATE.start_upsweep_~left~0#1_48| 1)) (<= |v_ULTIMATE.start_downsweep_~n#1_19| |v_ULTIMATE.start_main_~i~1#1_69|) (<= |v_ULTIMATE.start_downsweep_~space#1_35| 0) (< 1 |v_ULTIMATE.start_downsweep_~space#1_35|) (not (= .cse1 0))))))) (not (= |c_ULTIMATE.start_main_#t~malloc16#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)))) is different from false [2021-11-21 00:16:44,978 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= |c_ULTIMATE.start_main_~a0~0#1.offset| 0) (= .cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (= |c_ULTIMATE.start_main_~i~1#1| 0) (= .cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base|)) (not (= |c_ULTIMATE.start_main_~a0~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (forall ((|v_ULTIMATE.start_main_~i~1#1_69| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_14| Int) (|v_ULTIMATE.start_upsweep_~right~0#1_19| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_downsweep_~space#1_35| Int) (|v_ULTIMATE.start_downsweep_~n#1_19| Int) (|v_ULTIMATE.start_upsweep_~left~0#1_48| Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| (let ((.cse10 (let ((.cse12 (* |c_ULTIMATE.start_main_~i~1#1| 4))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base|) (+ .cse12 |ULTIMATE.start_main_~a0~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse12))))) (.cse11 (* |v_ULTIMATE.start_main_~i~1#1_69| 4))) (store .cse10 (+ .cse11 |ULTIMATE.start_main_~a0~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| .cse10) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse11))))))) (let ((.cse2 (let ((.cse4 (store (let ((.cse8 (select .cse3 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse9 (+ |v_ULTIMATE.start_upsweep_~a#1.offset_14| (* |v_ULTIMATE.start_upsweep_~right~0#1_19| 4)))) (store .cse8 .cse9 (+ (select .cse8 (+ |v_ULTIMATE.start_upsweep_~a#1.offset_14| (* |v_ULTIMATE.start_upsweep_~left~0#1_48| 4))) (select .cse8 .cse9)))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_downsweep_~n#1_19| 4) (- 4)) 0)) (.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 4) (* |v_ULTIMATE.start_downsweep_~space#1_35| 8)))) (let ((.cse7 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_downsweep_~space#1_35| 4) (- 4))) (.cse6 (select .cse4 .cse5))) (store (store .cse4 .cse5 (+ .cse6 (select .cse4 .cse7))) .cse7 .cse6))))) (let ((.cse1 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (< |v_ULTIMATE.start_upsweep_~a#1.offset_14| |c_ULTIMATE.start_main_~a~0#1.offset|) (not (= .cse1 0)) (< |v_ULTIMATE.start_upsweep_~left~0#1_48| 0) (< |v_ULTIMATE.start_upsweep_~right~0#1_19| (+ |v_ULTIMATE.start_upsweep_~left~0#1_48| 1)) (= (select .cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (+ (select (select (store .cse3 |c_ULTIMATE.start_main_~a~0#1.base| .cse2) |c_ULTIMATE.start_main_~a0~0#1.base|) |ULTIMATE.start_main_~a0~0#1.offset|) .cse1)) (< |v_ULTIMATE.start_main_~i~1#1_69| (+ |c_ULTIMATE.start_main_~i~1#1| 1)) (<= |v_ULTIMATE.start_downsweep_~n#1_19| |v_ULTIMATE.start_main_~i~1#1_69|) (<= |v_ULTIMATE.start_downsweep_~space#1_35| 0) (< 1 |v_ULTIMATE.start_downsweep_~space#1_35|)))))))) is different from false [2021-11-21 00:16:46,999 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse12 (select |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base|)) (.cse0 ((as const (Array Int Int)) 0))) (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse13 (@diff .cse12 .cse0))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= |c_ULTIMATE.start_main_~a0~0#1.offset| 0) (= .cse0 .cse1) (forall ((|v_ULTIMATE.start_upsweep_~a#1.offset_14| Int) (|v_ULTIMATE.start_upsweep_~right~0#1_19| Int) (|v_ULTIMATE.start_downsweep_~space#1_35| Int) (|v_ULTIMATE.start_downsweep_~n#1_19| Int) (|v_ULTIMATE.start_upsweep_~left~0#1_48| Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| (let ((.cse11 (* |c_ULTIMATE.start_main_~i~1#1| 4))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base|) (+ .cse11 |c_ULTIMATE.start_main_~a0~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse11))))))) (let ((.cse2 (let ((.cse5 (store (let ((.cse9 (select .cse3 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse10 (+ |v_ULTIMATE.start_upsweep_~a#1.offset_14| (* |v_ULTIMATE.start_upsweep_~right~0#1_19| 4)))) (store .cse9 .cse10 (+ (select .cse9 (+ |v_ULTIMATE.start_upsweep_~a#1.offset_14| (* |v_ULTIMATE.start_upsweep_~left~0#1_48| 4))) (select .cse9 .cse10)))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_downsweep_~n#1_19| 4) (- 4)) 0)) (.cse6 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 4) (* |v_ULTIMATE.start_downsweep_~space#1_35| 8)))) (let ((.cse8 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_downsweep_~space#1_35| 4) (- 4))) (.cse7 (select .cse5 .cse6))) (store (store .cse5 .cse6 (+ .cse7 (select .cse5 .cse8))) .cse8 .cse7))))) (let ((.cse4 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (= (select .cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (+ (select (select (store .cse3 |c_ULTIMATE.start_main_~a~0#1.base| .cse2) |c_ULTIMATE.start_main_~a0~0#1.base|) |c_ULTIMATE.start_main_~a0~0#1.offset|) .cse4)) (< |v_ULTIMATE.start_upsweep_~a#1.offset_14| |c_ULTIMATE.start_main_~a~0#1.offset|) (< |v_ULTIMATE.start_upsweep_~left~0#1_48| 0) (<= |v_ULTIMATE.start_downsweep_~n#1_19| |c_ULTIMATE.start_main_~i~1#1|) (< |v_ULTIMATE.start_upsweep_~right~0#1_19| (+ |v_ULTIMATE.start_upsweep_~left~0#1_48| 1)) (not (= .cse4 0)) (<= |v_ULTIMATE.start_downsweep_~space#1_35| 0) (< 1 |v_ULTIMATE.start_downsweep_~space#1_35|)))))) (= (store .cse12 .cse13 0) .cse0) (<= |c_ULTIMATE.start_main_~i~1#1| 1) (= 0 (select (let ((.cse14 (* |c_ULTIMATE.start_main_~i~1#1| 4))) (store .cse12 (+ .cse14 |c_ULTIMATE.start_main_~a0~0#1.offset|) (select .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse14)))) .cse13)) (not (= |c_ULTIMATE.start_main_~a0~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (<= 1 |c_ULTIMATE.start_main_~i~1#1|) (= .cse12 (store .cse0 |c_ULTIMATE.start_main_~a0~0#1.offset| (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|)))))) is different from false [2021-11-21 00:17:04,719 WARN L227 SmtUtils]: Spent 17.57s on a formula simplification. DAG size of input: 95 DAG size of output: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:17:13,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:17:13,186 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2021-11-21 00:17:13,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-21 00:17:13,187 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 50 states have (on average 1.36) internal successors, (68), 51 states have internal predecessors, (68), 4 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 36 [2021-11-21 00:17:13,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:17:13,188 INFO L225 Difference]: With dead ends: 65 [2021-11-21 00:17:13,188 INFO L226 Difference]: Without dead ends: 63 [2021-11-21 00:17:13,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 1995 ImplicationChecksByTransitivity, 117.4s TimeCoverageRelationStatistics Valid=499, Invalid=5987, Unknown=34, NotChecked=1670, Total=8190 [2021-11-21 00:17:13,191 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:17:13,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 176 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 1 Unknown, 98 Unchecked, 2.3s Time] [2021-11-21 00:17:13,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-21 00:17:13,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2021-11-21 00:17:13,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.425531914893617) internal successors, (67), 47 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:17:13,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 75 transitions. [2021-11-21 00:17:13,210 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 75 transitions. Word has length 36 [2021-11-21 00:17:13,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:17:13,210 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 75 transitions. [2021-11-21 00:17:13,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 50 states have (on average 1.36) internal successors, (68), 51 states have internal predecessors, (68), 4 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 00:17:13,211 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 75 transitions. [2021-11-21 00:17:13,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-21 00:17:13,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:17:13,212 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:17:13,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 00:17:13,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:17:13,418 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:17:13,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:17:13,418 INFO L85 PathProgramCache]: Analyzing trace with hash -225723473, now seen corresponding path program 2 times [2021-11-21 00:17:13,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:17:13,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145848830] [2021-11-21 00:17:13,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:17:13,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:17:13,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:17:13,558 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 00:17:13,559 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:17:13,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145848830] [2021-11-21 00:17:13,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145848830] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:17:13,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280151318] [2021-11-21 00:17:13,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:17:13,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:17:13,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:17:13,560 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:17:13,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb44ff2a-324f-4be0-b8db-6637c0e1ce48/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 00:17:13,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 00:17:13,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:17:13,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 00:17:13,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:17:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:17:13,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:17:13,877 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:17:13,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280151318] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:17:13,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1337237069] [2021-11-21 00:17:13,880 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-21 00:17:13,880 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:17:13,880 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:17:13,881 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:17:13,881 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs