./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy6_ground-2.i --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_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/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_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy6_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/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_d390f5e8-4342-403b-a2f7-efeec9415e6d/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 f9e86f2555d2c0682f4edf4cb7d0ea92e4bc79b6db041eb754ceacfe5541e219 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:55:22,317 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:55:22,319 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:55:22,371 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:55:22,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:55:22,376 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:55:22,378 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:55:22,383 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:55:22,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:55:22,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:55:22,393 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:55:22,395 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:55:22,396 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:55:22,399 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:55:22,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:55:22,407 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:55:22,409 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:55:22,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:55:22,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:55:22,422 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:55:22,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:55:22,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:55:22,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:55:22,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:55:22,439 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:55:22,440 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:55:22,441 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:55:22,443 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:55:22,443 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:55:22,445 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:55:22,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:55:22,447 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:55:22,449 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:55:22,451 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:55:22,452 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:55:22,452 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:55:22,453 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:55:22,454 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:55:22,454 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:55:22,455 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:55:22,456 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:55:22,457 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:55:22,500 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:55:22,500 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:55:22,501 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:55:22,501 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:55:22,509 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:55:22,509 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:55:22,509 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:55:22,510 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:55:22,510 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:55:22,510 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:55:22,511 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:55:22,512 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:55:22,512 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:55:22,512 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:55:22,512 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:55:22,512 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:55:22,513 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:55:22,513 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:55:22,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:55:22,514 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:55:22,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:55:22,514 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:55:22,515 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:55:22,515 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:55:22,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:55:22,515 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:55:22,517 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:55:22,517 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:55:22,517 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:55:22,517 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:55:22,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:55:22,518 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:55:22,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:55:22,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:55:22,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:55:22,519 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:55:22,519 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:55:22,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:55:22,520 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:55:22,520 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:55:22,520 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:55:22,520 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_d390f5e8-4342-403b-a2f7-efeec9415e6d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9e86f2555d2c0682f4edf4cb7d0ea92e4bc79b6db041eb754ceacfe5541e219 [2021-11-23 03:55:22,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:55:22,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:55:22,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:55:22,833 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:55:22,833 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:55:22,835 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-examples/standard_copy6_ground-2.i [2021-11-23 03:55:22,910 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/data/b21f3f93a/a3d4a6fd20f849608b1651a950eb5c91/FLAG3be8b1e51 [2021-11-23 03:55:23,459 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:55:23,459 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/sv-benchmarks/c/array-examples/standard_copy6_ground-2.i [2021-11-23 03:55:23,474 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/data/b21f3f93a/a3d4a6fd20f849608b1651a950eb5c91/FLAG3be8b1e51 [2021-11-23 03:55:23,793 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/data/b21f3f93a/a3d4a6fd20f849608b1651a950eb5c91 [2021-11-23 03:55:23,795 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:55:23,797 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:55:23,799 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:55:23,799 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:55:23,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:55:23,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:55:23" (1/1) ... [2021-11-23 03:55:23,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72cabe2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:55:23, skipping insertion in model container [2021-11-23 03:55:23,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:55:23" (1/1) ... [2021-11-23 03:55:23,814 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:55:23,830 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:55:24,014 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_d390f5e8-4342-403b-a2f7-efeec9415e6d/sv-benchmarks/c/array-examples/standard_copy6_ground-2.i[816,829] [2021-11-23 03:55:24,037 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:55:24,044 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:55:24,057 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_d390f5e8-4342-403b-a2f7-efeec9415e6d/sv-benchmarks/c/array-examples/standard_copy6_ground-2.i[816,829] [2021-11-23 03:55:24,069 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:55:24,082 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:55:24,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:55:24 WrapperNode [2021-11-23 03:55:24,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:55:24,084 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:55:24,084 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:55:24,085 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:55:24,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:55:24" (1/1) ... [2021-11-23 03:55:24,115 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:55:24" (1/1) ... [2021-11-23 03:55:24,153 INFO L137 Inliner]: procedures = 16, calls = 43, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 144 [2021-11-23 03:55:24,156 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:55:24,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:55:24,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:55:24,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:55:24,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:55:24" (1/1) ... [2021-11-23 03:55:24,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:55:24" (1/1) ... [2021-11-23 03:55:24,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:55:24" (1/1) ... [2021-11-23 03:55:24,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:55:24" (1/1) ... [2021-11-23 03:55:24,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:55:24" (1/1) ... [2021-11-23 03:55:24,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:55:24" (1/1) ... [2021-11-23 03:55:24,212 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:55:24" (1/1) ... [2021-11-23 03:55:24,214 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:55:24,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:55:24,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:55:24,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:55:24,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:55:24" (1/1) ... [2021-11-23 03:55:24,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:55:24,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:55:24,257 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:55:24,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:55:24,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:55:24,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:55:24,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:55:24,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:55:24,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:55:24,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:55:24,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:55:24,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:55:24,384 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:55:24,386 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:55:24,602 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:55:24,666 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:55:24,666 INFO L301 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-23 03:55:24,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:55:24 BoogieIcfgContainer [2021-11-23 03:55:24,669 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:55:24,670 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:55:24,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:55:24,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:55:24,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:55:23" (1/3) ... [2021-11-23 03:55:24,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74dbf072 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:55:24, skipping insertion in model container [2021-11-23 03:55:24,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:55:24" (2/3) ... [2021-11-23 03:55:24,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74dbf072 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:55:24, skipping insertion in model container [2021-11-23 03:55:24,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:55:24" (3/3) ... [2021-11-23 03:55:24,700 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy6_ground-2.i [2021-11-23 03:55:24,705 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:55:24,706 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:55:24,777 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:55:24,787 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 03:55:24,788 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:55:24,816 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 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 03:55:24,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 03:55:24,821 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:55:24,822 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:55:24,822 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:55:24,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:55:24,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1366277802, now seen corresponding path program 1 times [2021-11-23 03:55:24,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:55:24,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779340946] [2021-11-23 03:55:24,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:55:24,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:55:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:55:25,115 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 03:55:25,115 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:55:25,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779340946] [2021-11-23 03:55:25,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779340946] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:55:25,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:55:25,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:55:25,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589530303] [2021-11-23 03:55:25,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:55:25,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:55:25,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:55:25,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:55:25,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:55:25,167 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:55:25,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:55:25,256 INFO L93 Difference]: Finished difference Result 27 states and 43 transitions. [2021-11-23 03:55:25,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:55:25,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 03:55:25,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:55:25,267 INFO L225 Difference]: With dead ends: 27 [2021-11-23 03:55:25,267 INFO L226 Difference]: Without dead ends: 14 [2021-11-23 03:55:25,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 03:55:25,284 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:55:25,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:55:25,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-23 03:55:25,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-23 03:55:25,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:55:25,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 21 transitions. [2021-11-23 03:55:25,328 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 21 transitions. Word has length 11 [2021-11-23 03:55:25,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:55:25,352 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 21 transitions. [2021-11-23 03:55:25,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:55:25,353 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 21 transitions. [2021-11-23 03:55:25,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 03:55:25,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:55:25,354 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:55:25,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:55:25,356 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:55:25,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:55:25,358 INFO L85 PathProgramCache]: Analyzing trace with hash 649307915, now seen corresponding path program 1 times [2021-11-23 03:55:25,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:55:25,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402773097] [2021-11-23 03:55:25,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:55:25,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:55:25,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:55:25,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:55:25,453 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:55:25,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402773097] [2021-11-23 03:55:25,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402773097] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:55:25,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555351032] [2021-11-23 03:55:25,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:55:25,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:55:25,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:55:25,456 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:55:25,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:55:25,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:55:25,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:55:25,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:55:25,565 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 03:55:25,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:55:25,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555351032] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:55:25,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:55:25,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 03:55:25,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035183135] [2021-11-23 03:55:25,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:55:25,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:55:25,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:55:25,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:55:25,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:55:25,575 INFO L87 Difference]: Start difference. First operand 14 states and 21 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 03:55:25,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:55:25,648 INFO L93 Difference]: Finished difference Result 30 states and 48 transitions. [2021-11-23 03:55:25,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:55:25,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 03:55:25,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:55:25,652 INFO L225 Difference]: With dead ends: 30 [2021-11-23 03:55:25,652 INFO L226 Difference]: Without dead ends: 20 [2021-11-23 03:55:25,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:55:25,662 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:55:25,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:55:25,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-23 03:55:25,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-23 03:55:25,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:55:25,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2021-11-23 03:55:25,674 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 12 [2021-11-23 03:55:25,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:55:25,674 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2021-11-23 03:55:25,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 03:55:25,675 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2021-11-23 03:55:25,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 03:55:25,676 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:55:25,676 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:55:25,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:55:25,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-23 03:55:25,877 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:55:25,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:55:25,878 INFO L85 PathProgramCache]: Analyzing trace with hash -2133447112, now seen corresponding path program 1 times [2021-11-23 03:55:25,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:55:25,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176877581] [2021-11-23 03:55:25,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:55:25,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:55:25,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:55:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 03:55:25,926 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:55:25,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176877581] [2021-11-23 03:55:25,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176877581] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:55:25,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308254296] [2021-11-23 03:55:25,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:55:25,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:55:25,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:55:25,928 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:55:25,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:55:25,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:55:25,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:55:25,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:55:26,053 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 03:55:26,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:55:26,109 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 03:55:26,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308254296] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:55:26,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1837214040] [2021-11-23 03:55:26,130 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 03:55:26,130 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:55:26,135 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:55:26,140 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:55:26,141 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:55:26,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:26,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:26,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:26,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:26,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:26,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:26,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:26,874 INFO L354 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2021-11-23 03:55:26,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2021-11-23 03:55:26,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:26,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:26,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:26,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:26,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:26,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:26,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:26,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 43 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 52 [2021-11-23 03:55:27,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:27,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 03:55:27,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:27,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:27,713 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 03:55:27,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 654 treesize of output 653 [2021-11-23 03:55:28,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:55:28,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:28,750 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:28,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:28,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:28,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:28,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:28,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:28,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:28,836 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:55:28,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:55:28,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:28,911 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:28,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:28,949 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:55:28,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:55:29,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:29,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:29,083 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 03:55:29,084 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 100 treesize of output 129 [2021-11-23 03:55:29,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:29,182 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:29,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:29,224 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:55:29,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:55:29,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:29,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:29,337 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 03:55:29,337 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 100 treesize of output 119 [2021-11-23 03:55:29,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:29,440 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:29,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:29,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:29,482 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:29,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:29,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:29,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:29,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:29,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:29,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:29,569 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:55:29,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:55:29,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:29,622 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:29,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:29,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:29,661 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:29,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:29,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:29,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:29,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:29,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:29,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:29,732 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:55:29,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:55:29,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:29,786 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:29,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:29,824 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:55:29,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:55:29,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:29,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:29,912 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 03:55:29,913 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 100 treesize of output 119 [2021-11-23 03:55:29,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:30,016 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:30,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:30,063 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:55:30,329 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '319#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:55:30,329 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:55:30,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:55:30,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-23 03:55:30,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591188483] [2021-11-23 03:55:30,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:55:30,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:55:30,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:55:30,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:55:30,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:55:30,333 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 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 03:55:30,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:55:30,391 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2021-11-23 03:55:30,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:55:30,392 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-23 03:55:30,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:55:30,392 INFO L225 Difference]: With dead ends: 40 [2021-11-23 03:55:30,393 INFO L226 Difference]: Without dead ends: 23 [2021-11-23 03:55:30,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:55:30,395 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:55:30,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:55:30,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-23 03:55:30,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-23 03:55:30,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:55:30,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2021-11-23 03:55:30,401 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 18 [2021-11-23 03:55:30,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:55:30,401 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2021-11-23 03:55:30,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 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 03:55:30,402 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2021-11-23 03:55:30,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 03:55:30,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:55:30,403 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:55:30,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:55:30,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:55:30,630 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:55:30,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:55:30,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1638401661, now seen corresponding path program 2 times [2021-11-23 03:55:30,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:55:30,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006292236] [2021-11-23 03:55:30,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:55:30,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:55:30,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:55:30,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 03:55:30,688 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:55:30,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006292236] [2021-11-23 03:55:30,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006292236] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:55:30,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509755700] [2021-11-23 03:55:30,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:55:30,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:55:30,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:55:30,690 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:55:30,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:55:30,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 03:55:30,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:55:30,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:55:30,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:55:30,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 03:55:30,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:55:30,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 03:55:30,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509755700] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:55:30,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1130532470] [2021-11-23 03:55:30,875 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 03:55:30,875 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:55:30,876 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:55:30,876 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:55:30,876 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:55:30,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:30,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:30,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:30,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:30,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:30,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:30,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:31,379 INFO L354 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2021-11-23 03:55:31,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2021-11-23 03:55:31,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:31,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:31,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:31,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:31,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:31,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:31,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:31,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 43 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 52 [2021-11-23 03:55:31,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:31,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 03:55:31,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:31,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:31,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:31,801 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 03:55:31,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 664 treesize of output 652 [2021-11-23 03:55:31,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:55:32,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:32,022 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:32,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:32,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:32,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:32,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:32,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:32,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:32,091 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:55:32,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:55:32,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:32,151 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:32,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:32,189 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:55:32,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:55:32,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:32,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:32,292 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 03:55:32,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 129 [2021-11-23 03:55:32,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:32,385 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:32,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:32,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:32,420 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:32,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:32,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:32,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:32,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:32,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:32,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:32,497 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:55:32,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:55:32,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:32,545 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:32,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:32,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:32,585 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:32,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:32,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:32,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:32,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:32,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:32,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:32,646 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:55:32,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:55:32,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:32,743 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:32,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:32,780 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:55:32,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:55:32,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:32,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:32,896 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 03:55:32,896 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 100 treesize of output 129 [2021-11-23 03:55:32,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:32,993 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:32,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:33,026 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:55:33,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:55:33,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:33,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:33,153 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 03:55:33,153 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 100 treesize of output 119 [2021-11-23 03:55:33,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:33,267 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:33,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:33,298 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:55:33,570 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '563#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:55:33,570 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:55:33,570 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:55:33,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 03:55:33,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683242137] [2021-11-23 03:55:33,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:55:33,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:55:33,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:55:33,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:55:33,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:55:33,572 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:55:33,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:55:33,662 INFO L93 Difference]: Finished difference Result 56 states and 86 transitions. [2021-11-23 03:55:33,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:55:33,663 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-23 03:55:33,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:55:33,664 INFO L225 Difference]: With dead ends: 56 [2021-11-23 03:55:33,664 INFO L226 Difference]: Without dead ends: 41 [2021-11-23 03:55:33,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:55:33,666 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:55:33,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:55:33,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-23 03:55:33,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-11-23 03:55:33,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.2) internal successors, (48), 40 states have internal predecessors, (48), 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 03:55:33,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2021-11-23 03:55:33,673 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 21 [2021-11-23 03:55:33,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:55:33,674 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2021-11-23 03:55:33,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:55:33,674 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2021-11-23 03:55:33,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 03:55:33,675 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:55:33,676 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:55:33,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:55:33,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:55:33,902 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:55:33,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:55:33,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1651690538, now seen corresponding path program 3 times [2021-11-23 03:55:33,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:55:33,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069702133] [2021-11-23 03:55:33,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:55:33,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:55:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:55:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 03:55:34,009 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:55:34,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069702133] [2021-11-23 03:55:34,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069702133] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:55:34,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980151099] [2021-11-23 03:55:34,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:55:34,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:55:34,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:55:34,013 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:55:34,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:55:34,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:55:34,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:55:34,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:55:34,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:55:34,158 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 03:55:34,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:55:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 03:55:34,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980151099] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:55:34,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1894348399] [2021-11-23 03:55:34,267 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 03:55:34,268 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:55:34,268 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:55:34,268 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:55:34,268 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:55:34,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:34,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:34,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:34,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:34,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:34,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:34,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:34,573 INFO L354 Elim1Store]: treesize reduction 517, result has 10.1 percent of original size [2021-11-23 03:55:34,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 74 [2021-11-23 03:55:34,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:34,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:34,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:34,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:34,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:34,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:34,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:35,015 INFO L354 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2021-11-23 03:55:35,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2021-11-23 03:55:35,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:35,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 03:55:35,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:35,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:35,396 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 03:55:35,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 654 treesize of output 653 [2021-11-23 03:55:35,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:55:35,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:35,743 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:35,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:35,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:35,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:35,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:35,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:35,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:35,834 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:55:35,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:55:35,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:35,881 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:35,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:35,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:35,916 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:35,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:35,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:35,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:35,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:35,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:35,983 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:55:35,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:55:36,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:36,033 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:36,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:36,067 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:55:36,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:55:36,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:36,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:36,171 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 03:55:36,171 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 100 treesize of output 129 [2021-11-23 03:55:36,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:36,259 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:36,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:36,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:36,291 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:36,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:36,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:36,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:36,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:36,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:36,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:36,352 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:55:36,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:55:36,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:36,416 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:36,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:36,452 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:55:36,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:55:36,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:36,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:36,573 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 03:55:36,574 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 100 treesize of output 129 [2021-11-23 03:55:36,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:36,643 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:36,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:36,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:36,674 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:36,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:36,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:36,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:36,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:36,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:36,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:36,744 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:55:36,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:55:36,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:36,797 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:36,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:36,834 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:55:37,096 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '989#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:55:37,096 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:55:37,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:55:37,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-23 03:55:37,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051188704] [2021-11-23 03:55:37,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:55:37,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 03:55:37,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:55:37,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 03:55:37,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:55:37,098 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:55:37,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:55:37,173 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2021-11-23 03:55:37,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:55:37,174 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-23 03:55:37,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:55:37,174 INFO L225 Difference]: With dead ends: 82 [2021-11-23 03:55:37,174 INFO L226 Difference]: Without dead ends: 47 [2021-11-23 03:55:37,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:55:37,176 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:55:37,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:55:37,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-23 03:55:37,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-23 03:55:37,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 states have internal predecessors, (54), 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 03:55:37,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-11-23 03:55:37,183 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 39 [2021-11-23 03:55:37,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:55:37,183 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-11-23 03:55:37,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:55:37,184 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-11-23 03:55:37,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-23 03:55:37,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:55:37,185 INFO L514 BasicCegarLoop]: trace histogram [10, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:55:37,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:55:37,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:55:37,386 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:55:37,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:55:37,386 INFO L85 PathProgramCache]: Analyzing trace with hash 277696438, now seen corresponding path program 4 times [2021-11-23 03:55:37,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:55:37,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777365040] [2021-11-23 03:55:37,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:55:37,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:55:37,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:55:37,539 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 03:55:37,539 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:55:37,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777365040] [2021-11-23 03:55:37,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777365040] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:55:37,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138556142] [2021-11-23 03:55:37,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:55:37,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:55:37,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:55:37,541 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:55:37,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:55:37,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:55:37,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 03:55:37,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:55:37,701 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 03:55:37,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:55:37,922 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 03:55:37,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138556142] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:55:37,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [747829382] [2021-11-23 03:55:37,924 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 03:55:37,925 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:55:37,925 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:55:37,925 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:55:37,926 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:55:38,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:38,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:38,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:38,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:38,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:38,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:38,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:38,326 INFO L354 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2021-11-23 03:55:38,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2021-11-23 03:55:38,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:38,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:38,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:38,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:38,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:38,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:38,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:38,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 43 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 52 [2021-11-23 03:55:38,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:38,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 03:55:38,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:38,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:38,702 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 03:55:38,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 654 treesize of output 653 [2021-11-23 03:55:38,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:55:38,940 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:55:38,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:55:38,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:38,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:39,037 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 03:55:39,037 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 100 treesize of output 119 [2021-11-23 03:55:39,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:39,112 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:39,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:39,143 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:55:39,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:55:39,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:39,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:39,246 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 03:55:39,247 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 100 treesize of output 119 [2021-11-23 03:55:39,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:39,347 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:39,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:39,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:39,380 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:39,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:39,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:39,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:39,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:39,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:39,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:39,443 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:55:39,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:55:39,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:39,486 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:39,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:39,514 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:55:39,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:55:39,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:39,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:39,600 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 03:55:39,600 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 100 treesize of output 129 [2021-11-23 03:55:39,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:39,692 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:39,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:39,738 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:55:39,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:55:39,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:39,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:39,831 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 03:55:39,832 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 100 treesize of output 119 [2021-11-23 03:55:39,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:39,919 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:39,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:39,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:39,948 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:39,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:39,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:39,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:39,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:39,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:39,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:40,003 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:55:40,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:55:40,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:40,046 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:40,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:40,070 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:55:40,304 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1527#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:55:40,304 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:55:40,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:55:40,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2021-11-23 03:55:40,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881977610] [2021-11-23 03:55:40,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:55:40,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 03:55:40,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:55:40,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 03:55:40,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2021-11-23 03:55:40,306 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 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 03:55:40,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:55:40,387 INFO L93 Difference]: Finished difference Result 94 states and 119 transitions. [2021-11-23 03:55:40,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 03:55:40,388 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 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 45 [2021-11-23 03:55:40,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:55:40,389 INFO L225 Difference]: With dead ends: 94 [2021-11-23 03:55:40,389 INFO L226 Difference]: Without dead ends: 59 [2021-11-23 03:55:40,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2021-11-23 03:55:40,391 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:55:40,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:55:40,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-23 03:55:40,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-23 03:55:40,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 58 states have internal predecessors, (66), 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 03:55:40,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-11-23 03:55:40,399 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 45 [2021-11-23 03:55:40,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:55:40,399 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-11-23 03:55:40,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 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 03:55:40,400 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-11-23 03:55:40,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-23 03:55:40,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:55:40,401 INFO L514 BasicCegarLoop]: trace histogram [22, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:55:40,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-23 03:55:40,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:55:40,614 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:55:40,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:55:40,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1284919158, now seen corresponding path program 5 times [2021-11-23 03:55:40,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:55:40,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756293921] [2021-11-23 03:55:40,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:55:40,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:55:40,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:55:40,986 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 03:55:40,987 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:55:40,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756293921] [2021-11-23 03:55:40,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756293921] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:55:40,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819853055] [2021-11-23 03:55:40,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:55:40,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:55:40,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:55:40,988 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:55:40,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:55:41,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:55:41,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:55:41,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:55:41,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:55:41,279 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2021-11-23 03:55:41,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:55:41,436 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2021-11-23 03:55:41,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819853055] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:55:41,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [687474345] [2021-11-23 03:55:41,439 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 03:55:41,439 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:55:41,440 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:55:41,440 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:55:41,440 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:55:41,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:41,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:41,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:41,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:41,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:41,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:41,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:41,719 INFO L354 Elim1Store]: treesize reduction 517, result has 10.1 percent of original size [2021-11-23 03:55:41,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 74 [2021-11-23 03:55:41,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:41,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:41,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:41,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:41,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:41,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:41,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:42,070 INFO L354 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2021-11-23 03:55:42,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2021-11-23 03:55:42,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:42,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 03:55:42,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:42,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:42,431 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 03:55:42,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 654 treesize of output 653 [2021-11-23 03:55:42,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:55:42,835 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:55:42,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:55:42,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:42,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:42,929 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 03:55:42,930 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 100 treesize of output 129 [2021-11-23 03:55:43,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:43,013 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:43,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:43,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:43,046 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:43,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:43,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:43,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:43,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:43,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:43,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:43,104 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:55:43,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:55:43,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:43,147 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:43,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:43,179 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:55:43,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:55:43,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:43,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:43,282 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 03:55:43,283 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 100 treesize of output 119 [2021-11-23 03:55:43,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:43,347 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:43,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:43,378 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:55:43,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:55:43,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:43,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:43,479 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 03:55:43,479 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 100 treesize of output 129 [2021-11-23 03:55:43,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:43,576 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:43,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:43,606 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:55:43,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:55:43,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:43,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:43,670 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 03:55:43,671 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 100 treesize of output 119 [2021-11-23 03:55:43,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:43,763 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:43,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:43,791 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:55:43,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:55:43,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:43,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:43,881 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 03:55:43,881 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 100 treesize of output 129 [2021-11-23 03:55:43,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:43,953 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:43,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:43,983 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:55:44,301 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2195#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:55:44,302 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:55:44,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:55:44,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2021-11-23 03:55:44,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276517712] [2021-11-23 03:55:44,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:55:44,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-23 03:55:44,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:55:44,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-23 03:55:44,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 03:55:44,304 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 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 03:55:44,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:55:44,538 INFO L93 Difference]: Finished difference Result 131 states and 181 transitions. [2021-11-23 03:55:44,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-23 03:55:44,539 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 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 57 [2021-11-23 03:55:44,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:55:44,540 INFO L225 Difference]: With dead ends: 131 [2021-11-23 03:55:44,540 INFO L226 Difference]: Without dead ends: 96 [2021-11-23 03:55:44,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 03:55:44,542 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:55:44,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:55:44,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-23 03:55:44,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-11-23 03:55:44,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 95 states have internal predecessors, (103), 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 03:55:44,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2021-11-23 03:55:44,553 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 57 [2021-11-23 03:55:44,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:55:44,553 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2021-11-23 03:55:44,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 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 03:55:44,554 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2021-11-23 03:55:44,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-23 03:55:44,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:55:44,555 INFO L514 BasicCegarLoop]: trace histogram [23, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:55:44,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:55:44,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 03:55:44,776 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:55:44,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:55:44,776 INFO L85 PathProgramCache]: Analyzing trace with hash 549872075, now seen corresponding path program 6 times [2021-11-23 03:55:44,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:55:44,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866256808] [2021-11-23 03:55:44,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:55:44,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:55:44,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:55:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-23 03:55:45,252 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:55:45,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866256808] [2021-11-23 03:55:45,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866256808] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:55:45,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467852001] [2021-11-23 03:55:45,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:55:45,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:55:45,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:55:45,257 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:55:45,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:55:45,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:55:45,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:55:45,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 03:55:45,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:55:45,540 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-23 03:55:45,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:55:46,464 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-23 03:55:46,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467852001] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:55:46,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [261567087] [2021-11-23 03:55:46,467 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 03:55:46,467 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:55:46,467 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:55:46,467 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:55:46,467 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:55:46,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:46,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:46,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:46,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:46,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:46,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:46,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:46,745 INFO L354 Elim1Store]: treesize reduction 517, result has 10.1 percent of original size [2021-11-23 03:55:46,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 74 [2021-11-23 03:55:46,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:46,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:46,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:46,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:46,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:46,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:46,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:47,116 INFO L354 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2021-11-23 03:55:47,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2021-11-23 03:55:47,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:47,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 03:55:47,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:47,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:47,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:47,425 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 03:55:47,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 664 treesize of output 652 [2021-11-23 03:55:47,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:55:47,610 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:55:47,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:55:47,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:47,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:47,696 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 03:55:47,697 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 100 treesize of output 119 [2021-11-23 03:55:47,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:47,779 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:47,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:47,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:47,815 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:47,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:47,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:47,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:47,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:47,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:47,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:47,883 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:55:47,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:55:47,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:47,931 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:47,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:47,964 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:55:47,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:55:48,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:48,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:48,046 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 03:55:48,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 119 [2021-11-23 03:55:48,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:48,103 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:48,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:48,137 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:55:48,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:55:48,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:48,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:48,209 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 03:55:48,209 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 100 treesize of output 129 [2021-11-23 03:55:48,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:48,265 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:48,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:48,301 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:55:48,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:55:48,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:48,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:48,380 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 03:55:48,381 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 100 treesize of output 119 [2021-11-23 03:55:48,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:48,439 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:48,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:48,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:48,487 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:48,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:48,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:48,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:48,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:48,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:48,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:48,553 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:55:48,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:55:48,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:48,623 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:48,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:48,646 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:55:48,956 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3249#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:55:48,956 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:55:48,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:55:48,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2021-11-23 03:55:48,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991879784] [2021-11-23 03:55:48,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:55:48,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-23 03:55:48,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:55:48,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-23 03:55:48,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 03:55:48,960 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:55:49,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:55:49,098 INFO L93 Difference]: Finished difference Result 192 states and 230 transitions. [2021-11-23 03:55:49,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-23 03:55:49,099 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-23 03:55:49,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:55:49,100 INFO L225 Difference]: With dead ends: 192 [2021-11-23 03:55:49,100 INFO L226 Difference]: Without dead ends: 121 [2021-11-23 03:55:49,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 03:55:49,103 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:55:49,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:55:49,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-23 03:55:49,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-11-23 03:55:49,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0666666666666667) internal successors, (128), 120 states have internal predecessors, (128), 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 03:55:49,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 128 transitions. [2021-11-23 03:55:49,114 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 128 transitions. Word has length 94 [2021-11-23 03:55:49,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:55:49,115 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 128 transitions. [2021-11-23 03:55:49,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 50 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:55:49,115 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 128 transitions. [2021-11-23 03:55:49,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-23 03:55:49,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:55:49,118 INFO L514 BasicCegarLoop]: trace histogram [48, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:55:49,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:55:49,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-23 03:55:49,338 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:55:49,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:55:49,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1695148682, now seen corresponding path program 7 times [2021-11-23 03:55:49,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:55:49,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874471452] [2021-11-23 03:55:49,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:55:49,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:55:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:55:50,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-23 03:55:50,625 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:55:50,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874471452] [2021-11-23 03:55:50,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874471452] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:55:50,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051348790] [2021-11-23 03:55:50,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:55:50,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:55:50,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:55:50,627 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:55:50,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 03:55:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:55:50,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-23 03:55:50,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:55:51,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-23 03:55:51,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:55:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-23 03:55:53,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051348790] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:55:53,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [553760781] [2021-11-23 03:55:53,609 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 03:55:53,609 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:55:53,609 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:55:53,610 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:55:53,610 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:55:53,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:53,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:53,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:53,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:53,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:53,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:53,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:53,897 INFO L354 Elim1Store]: treesize reduction 517, result has 10.1 percent of original size [2021-11-23 03:55:53,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 74 [2021-11-23 03:55:53,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:53,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:53,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:53,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:53,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:53,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:53,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:54,275 INFO L354 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2021-11-23 03:55:54,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2021-11-23 03:55:54,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:54,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 03:55:54,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:54,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:54,600 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 03:55:54,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 654 treesize of output 653 [2021-11-23 03:55:54,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:55:54,921 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:55:54,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:55:54,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:54,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:55,011 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 03:55:55,012 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 100 treesize of output 129 [2021-11-23 03:55:55,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:55,073 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:55,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:55,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:55,105 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:55,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:55,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:55,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:55,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:55,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:55,164 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:55:55,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:55:55,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:55,205 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:55,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:55,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:55,240 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:55,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:55,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:55,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:55,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:55,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:55,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:55,282 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:55:55,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:55:55,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:55,333 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:55,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:55,358 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:55:55,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:55:55,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:55,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:55,448 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 03:55:55,449 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 100 treesize of output 129 [2021-11-23 03:55:55,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:55,504 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:55,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:55,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:55,574 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:55,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:55,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:55,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:55,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:55,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:55,629 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:55:55,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:55:55,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:55,690 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:55,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:55,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:55,729 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:55,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:55,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:55,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:55,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:55,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:55,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:55,787 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:55:55,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:55:55,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:55:55,834 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:55:55,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:55:55,862 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:55:56,291 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4675#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:55:56,291 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:55:56,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:55:56,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2021-11-23 03:55:56,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21834195] [2021-11-23 03:55:56,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:55:56,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-11-23 03:55:56,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:55:56,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-11-23 03:55:56,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2021-11-23 03:55:56,300 INFO L87 Difference]: Start difference. First operand 121 states and 128 transitions. Second operand has 101 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 100 states have internal predecessors, (117), 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 03:55:56,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:55:56,535 INFO L93 Difference]: Finished difference Result 242 states and 305 transitions. [2021-11-23 03:55:56,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-23 03:55:56,536 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 100 states have internal predecessors, (117), 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 119 [2021-11-23 03:55:56,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:55:56,538 INFO L225 Difference]: With dead ends: 242 [2021-11-23 03:55:56,538 INFO L226 Difference]: Without dead ends: 171 [2021-11-23 03:55:56,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2021-11-23 03:55:56,543 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:55:56,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:55:56,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-23 03:55:56,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2021-11-23 03:55:56,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.0470588235294118) internal successors, (178), 170 states have internal predecessors, (178), 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 03:55:56,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 178 transitions. [2021-11-23 03:55:56,558 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 178 transitions. Word has length 119 [2021-11-23 03:55:56,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:55:56,558 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 178 transitions. [2021-11-23 03:55:56,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 100 states have internal predecessors, (117), 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 03:55:56,559 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 178 transitions. [2021-11-23 03:55:56,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-23 03:55:56,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:55:56,562 INFO L514 BasicCegarLoop]: trace histogram [98, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:55:56,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 03:55:56,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:55:56,786 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:55:56,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:55:56,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1457906922, now seen corresponding path program 8 times [2021-11-23 03:55:56,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:55:56,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406707058] [2021-11-23 03:55:56,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:55:56,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:55:56,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:56:00,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5181 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-23 03:56:00,613 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:56:00,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406707058] [2021-11-23 03:56:00,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406707058] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:56:00,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190484029] [2021-11-23 03:56:00,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:56:00,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:56:00,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:56:00,616 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:56:00,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 03:56:12,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-23 03:56:12,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:56:12,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 03:56:12,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:56:13,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5181 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5126 trivial. 0 not checked. [2021-11-23 03:56:13,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:56:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5181 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5126 trivial. 0 not checked. [2021-11-23 03:56:14,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190484029] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:56:14,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [267673432] [2021-11-23 03:56:14,146 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 03:56:14,146 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:56:14,147 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:56:14,147 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:56:14,147 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:56:14,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:14,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:14,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:14,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:14,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:14,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:14,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:14,557 INFO L354 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2021-11-23 03:56:14,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2021-11-23 03:56:14,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:14,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:14,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:14,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:14,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:14,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:14,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:14,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 43 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 52 [2021-11-23 03:56:14,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:14,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 03:56:14,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:14,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:14,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:14,883 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 03:56:14,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 664 treesize of output 652 [2021-11-23 03:56:15,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:56:15,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:15,034 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:56:15,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:56:15,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:15,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:15,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:15,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:15,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:15,075 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:56:15,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:56:15,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:15,146 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:56:15,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:56:15,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:15,179 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:56:15,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:56:15,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:15,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:15,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:15,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:15,235 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:56:15,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:56:15,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:15,275 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:56:15,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:56:15,307 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:56:15,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:56:15,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:15,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:15,402 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 03:56:15,402 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 100 treesize of output 119 [2021-11-23 03:56:15,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:15,459 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:56:15,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:56:15,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:15,491 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:56:15,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:56:15,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:15,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:15,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:15,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:15,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:15,555 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:56:15,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:56:15,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:15,601 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:56:15,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:56:15,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:15,636 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:56:15,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:56:15,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:15,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:15,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:15,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:15,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:15,687 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:56:15,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:56:15,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:15,744 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:56:15,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:56:15,770 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:56:15,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:56:15,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:15,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:15,835 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 03:56:15,836 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 100 treesize of output 119 [2021-11-23 03:56:15,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:15,886 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:56:15,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:56:15,908 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:56:16,447 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6623#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:56:16,448 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:56:16,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:56:16,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2021-11-23 03:56:16,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770501815] [2021-11-23 03:56:16,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:56:16,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2021-11-23 03:56:16,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:56:16,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-11-23 03:56:16,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2021-11-23 03:56:16,455 INFO L87 Difference]: Start difference. First operand 171 states and 178 transitions. Second operand has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 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 03:56:17,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:56:17,007 INFO L93 Difference]: Finished difference Result 315 states and 401 transitions. [2021-11-23 03:56:17,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-11-23 03:56:17,008 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 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 169 [2021-11-23 03:56:17,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:56:17,010 INFO L225 Difference]: With dead ends: 315 [2021-11-23 03:56:17,010 INFO L226 Difference]: Without dead ends: 244 [2021-11-23 03:56:17,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2021-11-23 03:56:17,016 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 459 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 459 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:56:17,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [459 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:56:17,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-23 03:56:17,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2021-11-23 03:56:17,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.0329218106995885) internal successors, (251), 243 states have internal predecessors, (251), 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 03:56:17,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 251 transitions. [2021-11-23 03:56:17,038 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 251 transitions. Word has length 169 [2021-11-23 03:56:17,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:56:17,039 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 251 transitions. [2021-11-23 03:56:17,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 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 03:56:17,039 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 251 transitions. [2021-11-23 03:56:17,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-11-23 03:56:17,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:56:17,043 INFO L514 BasicCegarLoop]: trace histogram [99, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:56:17,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 03:56:17,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:56:17,270 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:56:17,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:56:17,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1254912203, now seen corresponding path program 9 times [2021-11-23 03:56:17,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:56:17,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912933927] [2021-11-23 03:56:17,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:56:17,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:56:17,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:56:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6468 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2021-11-23 03:56:21,021 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:56:21,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912933927] [2021-11-23 03:56:21,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912933927] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:56:21,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127229826] [2021-11-23 03:56:21,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:56:21,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:56:21,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:56:21,028 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:56:21,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 03:56:21,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:56:21,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:56:21,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 1222 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-23 03:56:21,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:56:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6468 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2021-11-23 03:56:21,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:56:31,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6468 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2021-11-23 03:56:31,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127229826] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:56:31,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1485292141] [2021-11-23 03:56:31,692 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 03:56:31,692 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:56:31,692 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:56:31,693 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:56:31,693 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:56:31,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:31,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:31,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:31,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:31,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:31,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:31,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:32,037 INFO L354 Elim1Store]: treesize reduction 517, result has 10.1 percent of original size [2021-11-23 03:56:32,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 74 [2021-11-23 03:56:32,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:32,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:32,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:32,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:32,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:32,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:32,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:32,476 INFO L354 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2021-11-23 03:56:32,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2021-11-23 03:56:32,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:32,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 03:56:32,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:32,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:32,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:32,871 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 03:56:32,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 664 treesize of output 652 [2021-11-23 03:56:33,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:56:33,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:33,045 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:56:33,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:56:33,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:33,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:33,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:33,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:33,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:33,105 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:56:33,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:56:33,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:33,164 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:56:33,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:56:33,198 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:56:33,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:56:33,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:33,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:33,308 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 03:56:33,309 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 100 treesize of output 129 [2021-11-23 03:56:33,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:33,413 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:56:33,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:56:33,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:33,443 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:56:33,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:56:33,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:33,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:33,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:33,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:33,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:33,507 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:56:33,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:56:33,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:33,556 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:56:33,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:56:33,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:33,594 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:56:33,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:56:33,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:33,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:33,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:33,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:33,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:33,652 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:56:33,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:56:33,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:33,705 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:56:33,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:56:33,732 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:56:33,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:56:33,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:33,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:33,829 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 03:56:33,829 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 100 treesize of output 129 [2021-11-23 03:56:33,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:33,908 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:56:33,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:56:33,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:33,939 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:56:33,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:56:33,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:33,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:33,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:33,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:33,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:34,001 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:56:34,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:56:34,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:56:34,043 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:56:34,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:56:34,064 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:56:34,633 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9381#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:56:34,633 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:56:34,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:56:34,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2021-11-23 03:56:34,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116065960] [2021-11-23 03:56:34,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:56:34,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2021-11-23 03:56:34,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:56:34,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2021-11-23 03:56:34,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2021-11-23 03:56:34,644 INFO L87 Difference]: Start difference. First operand 244 states and 251 transitions. Second operand has 203 states, 203 states have (on average 1.0788177339901477) internal successors, (219), 202 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:56:35,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:56:35,273 INFO L93 Difference]: Finished difference Result 488 states and 602 transitions. [2021-11-23 03:56:35,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-11-23 03:56:35,274 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0788177339901477) internal successors, (219), 202 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2021-11-23 03:56:35,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:56:35,277 INFO L225 Difference]: With dead ends: 488 [2021-11-23 03:56:35,277 INFO L226 Difference]: Without dead ends: 345 [2021-11-23 03:56:35,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 825 GetRequests, 619 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2021-11-23 03:56:35,282 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:56:35,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:56:35,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-11-23 03:56:35,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 345. [2021-11-23 03:56:35,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.0232558139534884) internal successors, (352), 344 states have internal predecessors, (352), 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 03:56:35,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 352 transitions. [2021-11-23 03:56:35,298 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 352 transitions. Word has length 242 [2021-11-23 03:56:35,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:56:35,299 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 352 transitions. [2021-11-23 03:56:35,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0788177339901477) internal successors, (219), 202 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:56:35,299 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 352 transitions. [2021-11-23 03:56:35,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2021-11-23 03:56:35,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:56:35,306 INFO L514 BasicCegarLoop]: trace histogram [200, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:56:35,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 03:56:35,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-23 03:56:35,526 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:56:35,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:56:35,526 INFO L85 PathProgramCache]: Analyzing trace with hash -843369290, now seen corresponding path program 10 times [2021-11-23 03:56:35,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:56:35,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258982152] [2021-11-23 03:56:35,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:56:35,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:56:35,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:56:49,579 INFO L134 CoverageAnalysis]: Checked inductivity of 21618 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2021-11-23 03:56:49,579 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:56:49,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258982152] [2021-11-23 03:56:49,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258982152] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:56:49,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667305877] [2021-11-23 03:56:49,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 03:56:49,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:56:49,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:56:49,582 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:56:49,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 03:56:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:56:49,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 1828 conjuncts, 202 conjunts are in the unsatisfiable core [2021-11-23 03:56:49,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:56:50,600 INFO L134 CoverageAnalysis]: Checked inductivity of 21618 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2021-11-23 03:56:50,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:57:30,660 INFO L134 CoverageAnalysis]: Checked inductivity of 21618 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2021-11-23 03:57:30,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667305877] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:57:30,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1146518365] [2021-11-23 03:57:30,663 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 03:57:30,663 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:57:30,664 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:57:30,664 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:57:30,664 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:57:30,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:57:30,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:57:30,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:57:30,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:57:30,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:57:30,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:57:30,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:57:30,981 INFO L354 Elim1Store]: treesize reduction 517, result has 10.1 percent of original size [2021-11-23 03:57:30,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 15 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 74 [2021-11-23 03:57:31,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:57:31,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:57:31,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:57:31,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:57:31,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:57:31,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:57:31,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:57:31,397 INFO L354 Elim1Store]: treesize reduction 735, result has 8.0 percent of original size [2021-11-23 03:57:31,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 41 case distinctions, treesize of input 159 treesize of output 193 [2021-11-23 03:57:31,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:57:31,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 03:57:31,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:57:31,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:57:31,679 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 03:57:31,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 654 treesize of output 653 [2021-11-23 03:57:32,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:57:32,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:57:32,205 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:57:32,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:57:32,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:57:32,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:57:32,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:57:32,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:57:32,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:57:32,264 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:57:32,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:57:32,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:57:32,313 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:57:32,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:57:32,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:57:32,341 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:57:32,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:57:32,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:57:32,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:57:32,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:57:32,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:57:32,401 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:57:32,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:57:32,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:57:32,443 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:57:32,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:57:32,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:57:32,471 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:57:32,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:57:32,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:57:32,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:57:32,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:57:32,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:57:32,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:57:32,539 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 03:57:32,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 115 [2021-11-23 03:57:32,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:57:32,592 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:57:32,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:57:32,621 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:57:32,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:57:32,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:57:32,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:57:32,708 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 03:57:32,708 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 100 treesize of output 119 [2021-11-23 03:57:32,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:57:32,772 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:57:32,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:57:32,804 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:57:32,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:57:32,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:57:32,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:57:32,887 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 03:57:32,888 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 100 treesize of output 129 [2021-11-23 03:57:32,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:57:32,953 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:57:32,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:57:32,986 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:57:32,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:57:33,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:57:33,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:57:33,066 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 03:57:33,066 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 100 treesize of output 119 [2021-11-23 03:57:33,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:57:33,156 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 03:57:33,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 03:57:33,183 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:57:39,022 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13495#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a7~0#1.base|) (+ |ULTIMATE.start_main_~#a7~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| |ULTIMATE.start_main_#t~mem16#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:57:39,022 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:57:39,022 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:57:39,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2021-11-23 03:57:39,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293496487] [2021-11-23 03:57:39,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:57:39,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2021-11-23 03:57:39,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:57:39,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2021-11-23 03:57:39,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2021-11-23 03:57:39,044 INFO L87 Difference]: Start difference. First operand 345 states and 352 transitions. Second operand has 405 states, 405 states have (on average 1.039506172839506) internal successors, (421), 404 states have internal predecessors, (421), 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 03:57:41,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:57:41,724 INFO L93 Difference]: Finished difference Result 690 states and 905 transitions. [2021-11-23 03:57:41,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2021-11-23 03:57:41,724 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.039506172839506) internal successors, (421), 404 states have internal predecessors, (421), 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 343 [2021-11-23 03:57:41,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:57:41,727 INFO L225 Difference]: With dead ends: 690 [2021-11-23 03:57:41,728 INFO L226 Difference]: Without dead ends: 547 [2021-11-23 03:57:41,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1229 GetRequests, 798 SyntacticMatches, 23 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17684 ImplicationChecksByTransitivity, 58.4s TimeCoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2021-11-23 03:57:41,737 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:57:41,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:57:41,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-11-23 03:57:41,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 547. [2021-11-23 03:57:41,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 1.0146520146520146) internal successors, (554), 546 states have internal predecessors, (554), 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 03:57:41,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 554 transitions. [2021-11-23 03:57:41,759 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 554 transitions. Word has length 343 [2021-11-23 03:57:41,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:57:41,760 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 554 transitions. [2021-11-23 03:57:41,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.039506172839506) internal successors, (421), 404 states have internal predecessors, (421), 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 03:57:41,761 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 554 transitions. [2021-11-23 03:57:41,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2021-11-23 03:57:41,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:57:41,766 INFO L514 BasicCegarLoop]: trace histogram [402, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:57:41,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 03:57:41,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 03:57:41,974 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:57:41,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:57:41,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1817148970, now seen corresponding path program 11 times [2021-11-23 03:57:41,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:57:41,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057161254] [2021-11-23 03:57:41,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:57:41,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:57:43,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:58:35,845 INFO L134 CoverageAnalysis]: Checked inductivity of 82521 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2021-11-23 03:58:35,846 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:58:35,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057161254] [2021-11-23 03:58:35,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057161254] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:58:35,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886808042] [2021-11-23 03:58:35,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:58:35,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:58:35,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:58:35,854 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:58:35,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d390f5e8-4342-403b-a2f7-efeec9415e6d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process