./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/revcpyswp2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_477cb2f5-8872-4596-8271-84d9eab479c9/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_477cb2f5-8872-4596-8271-84d9eab479c9/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_477cb2f5-8872-4596-8271-84d9eab479c9/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_477cb2f5-8872-4596-8271-84d9eab479c9/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/revcpyswp2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_477cb2f5-8872-4596-8271-84d9eab479c9/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_477cb2f5-8872-4596-8271-84d9eab479c9/bin/utaipan-EQgc7hIp5V --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 e5d836305a9654c4a87b407d535438bc329bb78fc0805b3b823600303a7df507 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:27:37,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:27:37,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:27:37,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:27:37,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:27:37,389 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:27:37,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:27:37,396 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:27:37,398 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:27:37,404 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:27:37,406 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:27:37,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:27:37,408 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:27:37,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:27:37,414 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:27:37,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:27:37,420 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:27:37,422 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:27:37,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:27:37,435 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:27:37,437 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:27:37,439 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:27:37,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:27:37,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:27:37,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:27:37,448 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:27:37,448 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:27:37,450 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:27:37,451 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:27:37,452 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:27:37,453 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:27:37,454 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:27:37,456 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:27:37,458 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:27:37,459 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:27:37,460 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:27:37,460 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:27:37,461 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:27:37,461 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:27:37,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:27:37,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:27:37,463 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_477cb2f5-8872-4596-8271-84d9eab479c9/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:27:37,509 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:27:37,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:27:37,510 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:27:37,510 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:27:37,517 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:27:37,518 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:27:37,518 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:27:37,518 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:27:37,519 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:27:37,519 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:27:37,520 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:27:37,520 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:27:37,520 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:27:37,521 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:27:37,521 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:27:37,521 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:27:37,521 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:27:37,521 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:27:37,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:27:37,522 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:27:37,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:27:37,523 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:27:37,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:27:37,523 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:27:37,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:27:37,524 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:27:37,524 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:27:37,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:27:37,525 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:27:37,525 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:27:37,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:27:37,526 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:27:37,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:27:37,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:27:37,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:27:37,526 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:27:37,527 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:27:37,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:27:37,527 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:27:37,527 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:27:37,528 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:27:37,528 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_477cb2f5-8872-4596-8271-84d9eab479c9/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_477cb2f5-8872-4596-8271-84d9eab479c9/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e5d836305a9654c4a87b407d535438bc329bb78fc0805b3b823600303a7df507 [2021-11-23 02:27:37,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:27:37,810 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:27:37,812 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:27:37,814 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:27:37,816 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:27:37,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_477cb2f5-8872-4596-8271-84d9eab479c9/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-tiling/revcpyswp2.c [2021-11-23 02:27:37,894 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_477cb2f5-8872-4596-8271-84d9eab479c9/bin/utaipan-EQgc7hIp5V/data/a779f8ca2/f7cd7f5a93b649ce893c1bfec9783ef6/FLAG88deb8894 [2021-11-23 02:27:38,371 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:27:38,372 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_477cb2f5-8872-4596-8271-84d9eab479c9/sv-benchmarks/c/array-tiling/revcpyswp2.c [2021-11-23 02:27:38,382 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_477cb2f5-8872-4596-8271-84d9eab479c9/bin/utaipan-EQgc7hIp5V/data/a779f8ca2/f7cd7f5a93b649ce893c1bfec9783ef6/FLAG88deb8894 [2021-11-23 02:27:38,769 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_477cb2f5-8872-4596-8271-84d9eab479c9/bin/utaipan-EQgc7hIp5V/data/a779f8ca2/f7cd7f5a93b649ce893c1bfec9783ef6 [2021-11-23 02:27:38,771 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:27:38,772 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:27:38,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:27:38,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:27:38,800 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:27:38,800 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:27:38" (1/1) ... [2021-11-23 02:27:38,801 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24159b68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:38, skipping insertion in model container [2021-11-23 02:27:38,802 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:27:38" (1/1) ... [2021-11-23 02:27:38,821 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:27:38,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:27:39,029 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_477cb2f5-8872-4596-8271-84d9eab479c9/sv-benchmarks/c/array-tiling/revcpyswp2.c[432,445] [2021-11-23 02:27:39,052 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:27:39,061 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:27:39,073 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_477cb2f5-8872-4596-8271-84d9eab479c9/sv-benchmarks/c/array-tiling/revcpyswp2.c[432,445] [2021-11-23 02:27:39,085 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:27:39,100 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:27:39,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:39 WrapperNode [2021-11-23 02:27:39,101 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:27:39,102 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:27:39,102 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:27:39,102 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:27:39,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:39" (1/1) ... [2021-11-23 02:27:39,120 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:39" (1/1) ... [2021-11-23 02:27:39,160 INFO L137 Inliner]: procedures = 16, calls = 28, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 108 [2021-11-23 02:27:39,160 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:27:39,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:27:39,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:27:39,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:27:39,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:39" (1/1) ... [2021-11-23 02:27:39,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:39" (1/1) ... [2021-11-23 02:27:39,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:39" (1/1) ... [2021-11-23 02:27:39,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:39" (1/1) ... [2021-11-23 02:27:39,207 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:39" (1/1) ... [2021-11-23 02:27:39,217 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:39" (1/1) ... [2021-11-23 02:27:39,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:39" (1/1) ... [2021-11-23 02:27:39,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:27:39,230 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:27:39,230 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:27:39,230 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:27:39,231 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:39" (1/1) ... [2021-11-23 02:27:39,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:27:39,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_477cb2f5-8872-4596-8271-84d9eab479c9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:27:39,275 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_477cb2f5-8872-4596-8271-84d9eab479c9/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:27:39,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_477cb2f5-8872-4596-8271-84d9eab479c9/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:27:39,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:27:39,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:27:39,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:27:39,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:27:39,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:27:39,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:27:39,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:27:39,414 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:27:39,415 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:27:39,589 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:27:39,623 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:27:39,623 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-23 02:27:39,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:27:39 BoogieIcfgContainer [2021-11-23 02:27:39,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:27:39,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:27:39,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:27:39,631 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:27:39,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:27:38" (1/3) ... [2021-11-23 02:27:39,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f40491 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:27:39, skipping insertion in model container [2021-11-23 02:27:39,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:39" (2/3) ... [2021-11-23 02:27:39,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f40491 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:27:39, skipping insertion in model container [2021-11-23 02:27:39,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:27:39" (3/3) ... [2021-11-23 02:27:39,634 INFO L111 eAbstractionObserver]: Analyzing ICFG revcpyswp2.c [2021-11-23 02:27:39,640 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:27:39,640 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:27:39,691 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:27:39,699 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 [2021-11-23 02:27:39,700 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:27:39,715 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:39,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 02:27:39,720 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:39,721 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:39,721 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:39,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:39,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1725272608, now seen corresponding path program 1 times [2021-11-23 02:27:39,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:39,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343184419] [2021-11-23 02:27:39,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:39,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:39,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:39,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:27:39,914 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:39,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343184419] [2021-11-23 02:27:39,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343184419] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:39,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:39,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:27:39,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89488809] [2021-11-23 02:27:39,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:39,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:27:39,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:39,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:27:39,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:27:39,954 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:40,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:40,014 INFO L93 Difference]: Finished difference Result 24 states and 35 transitions. [2021-11-23 02:27:40,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:27:40,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 02:27:40,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:40,026 INFO L225 Difference]: With dead ends: 24 [2021-11-23 02:27:40,026 INFO L226 Difference]: Without dead ends: 12 [2021-11-23 02:27:40,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:27:40,034 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:40,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:27:40,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-23 02:27:40,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-23 02:27:40,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:40,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2021-11-23 02:27:40,071 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2021-11-23 02:27:40,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:40,072 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2021-11-23 02:27:40,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:40,073 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2021-11-23 02:27:40,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 02:27:40,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:40,073 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:40,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:27:40,074 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:40,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:40,075 INFO L85 PathProgramCache]: Analyzing trace with hash -442098293, now seen corresponding path program 1 times [2021-11-23 02:27:40,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:40,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599255124] [2021-11-23 02:27:40,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:40,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:40,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:27:40,155 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:40,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599255124] [2021-11-23 02:27:40,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599255124] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:40,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:40,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:27:40,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265311943] [2021-11-23 02:27:40,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:40,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:27:40,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:40,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:27:40,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:27:40,173 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:40,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:40,240 INFO L93 Difference]: Finished difference Result 27 states and 36 transitions. [2021-11-23 02:27:40,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:27:40,241 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 02:27:40,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:40,242 INFO L225 Difference]: With dead ends: 27 [2021-11-23 02:27:40,242 INFO L226 Difference]: Without dead ends: 20 [2021-11-23 02:27:40,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:27:40,245 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:40,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 7 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:27:40,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-23 02:27:40,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2021-11-23 02:27:40,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:40,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2021-11-23 02:27:40,253 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 10 [2021-11-23 02:27:40,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:40,254 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2021-11-23 02:27:40,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:40,254 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2021-11-23 02:27:40,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 02:27:40,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:40,255 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:40,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:27:40,256 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:40,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:40,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1461741124, now seen corresponding path program 1 times [2021-11-23 02:27:40,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:40,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313459911] [2021-11-23 02:27:40,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:40,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:40,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:40,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 02:27:40,381 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:40,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313459911] [2021-11-23 02:27:40,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313459911] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:27:40,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542417183] [2021-11-23 02:27:40,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:40,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:40,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_477cb2f5-8872-4596-8271-84d9eab479c9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:27:40,397 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_477cb2f5-8872-4596-8271-84d9eab479c9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:27:40,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_477cb2f5-8872-4596-8271-84d9eab479c9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:27:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:40,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:27:40,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:40,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 02:27:40,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 02:27:40,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542417183] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:27:40,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [991507756] [2021-11-23 02:27:40,723 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:27:40,723 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:27:40,731 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:27:40,737 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:27:40,738 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:27:41,156 INFO L354 Elim1Store]: treesize reduction 303, result has 20.1 percent of original size [2021-11-23 02:27:41,157 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 6 case distinctions, treesize of input 39 treesize of output 92 [2021-11-23 02:27:41,611 INFO L354 Elim1Store]: treesize reduction 402, result has 16.4 percent of original size [2021-11-23 02:27:41,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 27 case distinctions, treesize of input 80 treesize of output 137 [2021-11-23 02:27:41,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:41,719 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 02:27:41,719 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 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-23 02:27:41,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:41,870 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 02:27:41,870 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 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-23 02:27:41,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:41,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:42,111 INFO L354 Elim1Store]: treesize reduction 483, result has 24.9 percent of original size [2021-11-23 02:27:42,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 192 treesize of output 232 [2021-11-23 02:27:42,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:42,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 62 [2021-11-23 02:27:42,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:42,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 62 [2021-11-23 02:27:42,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:42,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:42,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 76 [2021-11-23 02:27:42,430 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:27:42,476 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:27:42,545 WARN L220 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:27:42,577 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:27:42,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:42,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:42,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:42,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 62 [2021-11-23 02:27:42,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:42,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:42,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:42,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:42,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 79 [2021-11-23 02:27:42,900 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:27:42,942 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:27:43,053 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:27:43,084 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:27:43,121 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:27:43,144 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:27:43,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:43,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:43,334 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-11-23 02:27:43,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 336 treesize of output 238 [2021-11-23 02:27:43,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:43,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:43,380 INFO L354 Elim1Store]: treesize reduction 110, result has 2.7 percent of original size [2021-11-23 02:27:43,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 174 treesize of output 93 [2021-11-23 02:27:43,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:43,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:43,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:43,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:43,425 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:27:43,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 149 treesize of output 73 [2021-11-23 02:27:43,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:43,482 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-23 02:27:43,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 290 treesize of output 214 [2021-11-23 02:27:43,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:43,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:43,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:43,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 61 [2021-11-23 02:27:43,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:43,573 INFO L354 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2021-11-23 02:27:43,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 151 treesize of output 99 [2021-11-23 02:27:43,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:43,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:43,905 INFO L354 Elim1Store]: treesize reduction 483, result has 24.9 percent of original size [2021-11-23 02:27:43,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 192 treesize of output 232 [2021-11-23 02:27:43,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:43,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:27:43,970 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 112 treesize of output 93 [2021-11-23 02:27:44,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:44,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:44,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:44,025 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-11-23 02:27:44,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 107 [2021-11-23 02:27:44,091 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:27:44,120 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:27:44,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:44,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:44,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:44,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:44,216 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-11-23 02:27:44,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 158 treesize of output 90 [2021-11-23 02:27:44,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:44,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:44,295 INFO L354 Elim1Store]: treesize reduction 92, result has 18.6 percent of original size [2021-11-23 02:27:44,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 183 treesize of output 120 [2021-11-23 02:27:44,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:44,364 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 02:27:44,365 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 43 treesize of output 18 [2021-11-23 02:27:44,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:44,441 INFO L354 Elim1Store]: treesize reduction 110, result has 24.7 percent of original size [2021-11-23 02:27:44,442 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 88 treesize of output 62 [2021-11-23 02:27:44,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:44,509 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:27:44,510 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 73 treesize of output 28 [2021-11-23 02:27:44,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:44,551 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 02:27:44,552 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 43 treesize of output 18 [2021-11-23 02:27:44,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:44,638 INFO L354 Elim1Store]: treesize reduction 110, result has 24.7 percent of original size [2021-11-23 02:27:44,638 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 88 treesize of output 62 [2021-11-23 02:27:44,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:44,707 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:27:44,707 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 73 treesize of output 28 [2021-11-23 02:27:44,741 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:27:45,089 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '220#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~b~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 100000 ~MAX~0) (<= ~SIZE~0 100000) (= (select (select |#memory_int| |ULTIMATE.start_main_~a_copy~0#1.base|) (+ (* ~SIZE~0 4) |ULTIMATE.start_main_~a_copy~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (- 4)) (- 4))) |ULTIMATE.start_main_#t~mem23#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem22#1|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~a_copy~0#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~b_copy~0#1.offset|) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a_copy~0#1.offset| 0) (<= |ULTIMATE.start_main_~b_copy~0#1.offset| 0) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~MAX~0 100000))' at error location [2021-11-23 02:27:45,090 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:27:45,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:27:45,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 02:27:45,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090231215] [2021-11-23 02:27:45,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:27:45,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:27:45,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:45,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:27:45,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:27:45,092 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:45,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:45,148 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2021-11-23 02:27:45,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:27:45,149 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 02:27:45,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:45,150 INFO L225 Difference]: With dead ends: 27 [2021-11-23 02:27:45,150 INFO L226 Difference]: Without dead ends: 16 [2021-11-23 02:27:45,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:27:45,152 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:45,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 17 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:27:45,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-23 02:27:45,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-23 02:27:45,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:45,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-11-23 02:27:45,157 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 13 [2021-11-23 02:27:45,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:45,157 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-11-23 02:27:45,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:45,158 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-11-23 02:27:45,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 02:27:45,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:45,158 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:45,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_477cb2f5-8872-4596-8271-84d9eab479c9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:27:45,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_477cb2f5-8872-4596-8271-84d9eab479c9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:45,359 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:45,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:45,360 INFO L85 PathProgramCache]: Analyzing trace with hash -346719257, now seen corresponding path program 2 times [2021-11-23 02:27:45,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:45,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61845465] [2021-11-23 02:27:45,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:45,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:45,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:45,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 02:27:45,439 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:45,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61845465] [2021-11-23 02:27:45,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61845465] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:27:45,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705068362] [2021-11-23 02:27:45,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:27:45,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:45,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_477cb2f5-8872-4596-8271-84d9eab479c9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:27:45,456 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_477cb2f5-8872-4596-8271-84d9eab479c9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:27:45,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_477cb2f5-8872-4596-8271-84d9eab479c9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:27:45,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 02:27:45,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:27:45,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:27:45,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:45,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 02:27:45,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:27:45,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 02:27:45,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705068362] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:27:45,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1211953145] [2021-11-23 02:27:45,614 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-23 02:27:45,614 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:27:45,614 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:27:45,614 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:27:45,614 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:27:45,895 INFO L354 Elim1Store]: treesize reduction 402, result has 16.4 percent of original size [2021-11-23 02:27:45,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 27 case distinctions, treesize of input 80 treesize of output 137 [2021-11-23 02:27:45,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 25 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 02:27:46,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-11-23 02:27:46,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:46,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:46,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:46,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:46,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:46,310 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-23 02:27:46,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 554 treesize of output 544 [2021-11-23 02:27:46,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:46,771 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 02:27:46,775 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 1 case distinctions, treesize of input 59 treesize of output 45 [2021-11-23 02:27:46,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:46,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:46,930 INFO L354 Elim1Store]: treesize reduction 483, result has 24.9 percent of original size [2021-11-23 02:27:46,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 192 treesize of output 232 [2021-11-23 02:27:46,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:46,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:46,988 INFO L354 Elim1Store]: treesize reduction 92, result has 18.6 percent of original size [2021-11-23 02:27:46,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 175 treesize of output 120 [2021-11-23 02:27:47,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:47,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:47,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:47,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:47,056 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:27:47,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 152 treesize of output 82 [2021-11-23 02:27:47,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:47,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:47,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:47,129 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-11-23 02:27:47,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 115 treesize of output 82 [2021-11-23 02:27:47,189 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:27:47,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:47,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:47,407 INFO L354 Elim1Store]: treesize reduction 483, result has 24.9 percent of original size [2021-11-23 02:27:47,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 192 treesize of output 232 [2021-11-23 02:27:47,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:47,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:47,478 INFO L354 Elim1Store]: treesize reduction 92, result has 18.6 percent of original size [2021-11-23 02:27:47,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 200 treesize of output 137 [2021-11-23 02:27:47,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:47,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:47,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:47,700 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-11-23 02:27:47,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 121 treesize of output 80 [2021-11-23 02:27:47,765 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:27:47,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:47,835 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:27:47,836 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 73 treesize of output 28 [2021-11-23 02:27:47,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:47,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:47,879 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:27:47,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 136 treesize of output 94 [2021-11-23 02:27:47,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:47,923 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:27:47,923 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 73 treesize of output 28 [2021-11-23 02:27:47,948 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 02:27:47,949 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 43 treesize of output 18 [2021-11-23 02:27:47,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:48,007 INFO L354 Elim1Store]: treesize reduction 110, result has 24.7 percent of original size [2021-11-23 02:27:48,008 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 131 treesize of output 105 [2021-11-23 02:27:48,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:27:48,090 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:27:48,090 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 73 treesize of output 28 [2021-11-23 02:27:48,192 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:27:48,585 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '381#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= ~MAX~0 100000) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= (select (select |#memory_int| |ULTIMATE.start_main_~a_copy~0#1.base|) (+ (* ~SIZE~0 4) |ULTIMATE.start_main_~a_copy~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (- 4)) (- 4))) |ULTIMATE.start_main_#t~mem23#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem22#1|) (<= 0 |ULTIMATE.start_main_~a_copy~0#1.offset|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~b_copy~0#1.offset|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a_copy~0#1.offset| 0) (<= |ULTIMATE.start_main_~b_copy~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 02:27:48,585 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:27:48,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:27:48,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-11-23 02:27:48,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590040870] [2021-11-23 02:27:48,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:27:48,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:27:48,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:48,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:27:48,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:27:48,587 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:48,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:48,654 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2021-11-23 02:27:48,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:27:48,654 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 02:27:48,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:48,655 INFO L225 Difference]: With dead ends: 38 [2021-11-23 02:27:48,655 INFO L226 Difference]: Without dead ends: 29 [2021-11-23 02:27:48,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:27:48,657 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 38 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:48,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 10 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:27:48,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-23 02:27:48,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2021-11-23 02:27:48,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:48,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-23 02:27:48,663 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 14 [2021-11-23 02:27:48,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:48,663 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-23 02:27:48,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:48,664 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-23 02:27:48,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 02:27:48,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:48,665 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:48,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_477cb2f5-8872-4596-8271-84d9eab479c9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:27:48,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_477cb2f5-8872-4596-8271-84d9eab479c9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:48,873 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:48,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:48,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1872217504, now seen corresponding path program 3 times [2021-11-23 02:27:48,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:48,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073748844] [2021-11-23 02:27:48,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:48,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:49,743 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:27:49,743 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:49,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073748844] [2021-11-23 02:27:49,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073748844] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:27:49,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058152651] [2021-11-23 02:27:49,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:27:49,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:27:49,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_477cb2f5-8872-4596-8271-84d9eab479c9/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:27:49,744 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_477cb2f5-8872-4596-8271-84d9eab479c9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:27:49,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_477cb2f5-8872-4596-8271-84d9eab479c9/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:27:49,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:27:49,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:27:49,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 02:27:49,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:27:49,830 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:27:49,831 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 23 treesize of output 19 [2021-11-23 02:27:50,001 INFO L354 Elim1Store]: treesize reduction 159, result has 29.3 percent of original size [2021-11-23 02:27:50,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 152 [2021-11-23 02:27:50,045 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:27:50,132 INFO L354 Elim1Store]: treesize reduction 39, result has 31.6 percent of original size [2021-11-23 02:27:50,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 47 [2021-11-23 02:27:50,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 22 [2021-11-23 02:27:50,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 47 [2021-11-23 02:27:50,611 INFO L354 Elim1Store]: treesize reduction 690, result has 21.0 percent of original size [2021-11-23 02:27:50,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 228 treesize of output 338 [2021-11-23 02:27:51,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:51,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:51,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:51,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:51,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:51,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 134 [2021-11-23 02:27:51,679 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:27:53,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:53,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:53,075 INFO L354 Elim1Store]: treesize reduction 264, result has 14.0 percent of original size [2021-11-23 02:27:53,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 5 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 277 treesize of output 191 [2021-11-23 02:27:54,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:54,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:54,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:54,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 116 [2021-11-23 02:27:54,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:54,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:54,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:27:54,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 116 [2021-11-23 02:27:55,055 INFO L354 Elim1Store]: treesize reduction 548, result has 26.6 percent of original size [2021-11-23 02:27:55,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 25 case distinctions, treesize of input 311 treesize of output 290 [2021-11-23 02:28:56,714 WARN L227 SmtUtils]: Spent 28.08s on a formula simplification. DAG size of input: 1460 DAG size of output: 915 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-23 02:28:56,731 INFO L354 Elim1Store]: treesize reduction 6391, result has 40.7 percent of original size [2021-11-23 02:28:56,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 28 select indices, 28 select index equivalence classes, 3 disjoint index pairs (out of 378 index pairs), introduced 28 new quantified variables, introduced 382 case distinctions, treesize of input 1953 treesize of output 4875